Upper Midwest Environmental Sciences Center
WATER QUALITY LIABILITY DISCLAIMER AND FORMAT DESCRIPTION Disclaimer These data have been generated by State agencies under contract with the Department of the Interior and the Upper Midwest Environmental Sciences Center (UMESC). Although these data have been processed successfully on a computer system at the UMESC, no warranty, expressed or implied, is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Error correction is a continuing process, and UMESC corrects data data errors routinely when a correct value can be determined. UMESC does not delete questionable data when the correct value cannot be determined, but attempts to mark such data with an appropriate flag. Users are strongly cautioned to check the accuracy of any data obtained and to report suspected values to UMESC. Methods, purposes, and conditions can vary dramatically among data-collecting efforts and these data should not be combined with other datasets from the UMESC or other sources unless the user fully understands the procedures and purposes used to create each set of data and can verify that data are comparable across sources. ------------------------------------------------------------------------------- Crediting Language These data are a product of the U.S. Army Corps of Engineers' Upper Mississippi River Restoration Program (UMRR) Long Term Resource Monitoring (LTRM) element implemented by the U.S. Geological Survey in collaboration with the five Upper Mississippi River System (UMRS) states of Illinois, Iowa, Minnesota, Missouri, and Wisconsin. The U.S. Army Corps of Engineers (Corps) provides guidance and has overall program responsibility. ------------------------------------------------------------------------------- WATER QUALITY TREND ANALYSIS DATA The Long Term Resource Monitoring Program (LTRMP) sampling effort has evolved steadily since its inception in 1988. Three LTRMP field stations began taking limnological measurements in Pools 8, 13, and 26 of the Upper Mississippi River in the summer of 1988. Sampling in La Grange Pool of the Illinois River began in September 1989. A few months later (January 1990), LTRMP water quality sampling commenced in Pool 4 (Lake Pepin), and a year later (March 1991), sampling was begun on the open river reach near Cape Girardeau, Missouri. All six field stations have operated continuously since joining the LTRMP. As the LTRMP field stations have grown, the parameters measured in water quality monitoring have gradually expanded. From 1988 to 1991, the LTRMP limnological sampling effort was limited to a basic suite of field measurements that required no laboratory analysis. A limited suite of laboratory analyses was added to the water quality effort in 1991 (these samples were analyzed by the U.S. Army Corps of Engineers Waterways Experiment Station, in Vicksburg, Mississippi). In 1993, the LTRMP developed an interna analytical lab, and the list of parameters was further expanded. Some reduction in parameters is possible in 1996, but this decision is still pending. ------------------------------------------------------------------------------- FOREWARD Use of LTRMP Trend Data for Water Quality Monitoring The LTRMP performs basic limnological field measurements in the Upper Mississippi River System (UMRS). Correct interpretation of the resulting measurements requires that the user understand the design, intent, and history of the sampling effort. Some of the necessary information is provided below, but all users of LTRMP limnological data are strongly encouraged to read and understand the Water Quality section of the LTRMP Procedures Manual (Soballe et al. 1995), which describes in greater detail both historical and current procedures. This document is accessible by request from: Water Quality Coordinator Upper Midwest Environmental Sciences Center U.S. Geological Survey 2630 Fanta Reed Road La Crosse, WI 54603 USA Tel: (608) 781-6216, ext. 126 Fax: (608) 783-6066 ------------------------------------------------------------------------------- SUMMARY LTRMP Water Quality Sampling Design The basic design of the sampling effort was revised in 1993. From July 1988 through June 1993, the LTRMP performed weekly limnological measurements at 15-30 permanently fixed sampling locations in each study area. These sampling locations were chosen without randomization (or replicaton) to represent 23 general habitat types and typical river reaches in the UMRS. This approach did not meet the needs of the program, and in June 1993, a new sampling design was implemented which incorporated both fixed-site sampling (at a revised set of sampling sites on a bi-weekly basis), stratified random sampling (on a quarterly basis), and an expanded set of measurements. Fixed-site sampling is now used to monitor tributaries, headwaters, tailwaters, and other points of special interest. Randomized sampling is used to characterize broad aquatic (habitat) areas. Special care is required to combine current data with data from the period prior to this design change. Interpretation of the stratified random sampling data collected after June 1993 also requires additional information. Users are strongly encouraged to consult the LTRMP procedures manual(s) and UMESC staff to determine the applicability of these data to specific applications. ------------------------------------------------------------------------------- REFERENCES Soballe, D. M., R. Burkhardt, K. Lubinski, R. Burdis, T. Clemment, J. Fischer, L. Hodge-Richardson, L. Conaway, J. Frazier, D. Gould, M. Steuck, E. Ratcliff, M. Sitzes, S. Stenzel, and R. Wright. 1995. Long Term Resoure Monitoring Program Procedures: Water Quality Monitoring. U.S. Geological Survey, Biological Resources Divsion, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin (in press). ------------------------------------------------------------------------------- WATER QUALITY FIXED FORMAT FILE DOWNLOAD FILE The fixed format file has all the data aligned to a specific column within the dataset. Every field will start and end exactly in the same location. No field names are specified in this format. ------------------------------------------------------------------------------- THE "FORMAT" COLUMN CONTAINS THE FOLLOWING FORMAT SPECIFIERS: "a": alpha character (always UPPER case); "b": a blank space; "blank": a missing value; "c": alpha character/symbol/digit; "c(xx)": character string where xx represents the maximum number of characters allowed; "9": any digit, 0 - 9; "MM/DD/YYYY": date format; ------------------------------------------------------------------------------- Field Name Short Name Format Value Range/Default Value Historical Info -------------------------------------------------------------------------------- BARCODE SHEETBAR 99999999 1 - 99999999 1993 TO PRESENT FIELD_STATION_NUMBER FLDNUM 9 1,2,3,4,5,6 1988 TO PRESENT DATE_TIME DATE MM/DD/YYYY 05/01/1992 - TO PRESENT 1988 TO PRESENT TIME_ONLY TIME HH:MI 00:00 - 23:59 1988 TO PRESENT NUMBER_OF_RECORDS NSAMPLES 9 1 - 6 1993 TO PRESENT PROJECT_CODE PROJCD c-ccc SEE FIELD DESCRIPTIONS 1993 TO PRESENT LOCATION_CODE LOCATCD a999.9a SEE FIELD DESCRIPTIONS 1988 TO PRESENT DBLKCD DATABLCK a999999 SEE FIELD DESCRIPTIONS 1989 TO PRESENT WAVE_HEIGHT WAVHI 999 0 - 999 1988 TO PRESENT WAVE_HEIGHT_QF WAVEHIQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT WATER_DEPTH WDP 99.99 0 - 99.99 1988 TO PRESENT WATER_DEPTH_QF ZMAXQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT ZMAX ZMAX 99.99 0 - 99.99 1988 TO PRESENT SECCHI_DISK SECCHI 999 0 - 999 1988 TO PRESENT SECCHI_DISK_QF SECCHIQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT WAVE_CODE WAVCD 9 0,1,2,3,4 1993 TO PRESENT ICE_DEPTH ZICE 999.9 0 - 999.9 1990 TO PRESENT ICE_DEPTH_QF ZICEQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT SUB_ICE_DEPTH ZSICE 999 0 - 999 1993 TO PRESENT SUB_ICE_DEPTH_QF ZSICEQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT ICE_COVER_PERCENT PICE 999 0 - 100 1990 TO PRESENT ICE_COVER_PERCENT_QF PICEQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT SNOW_DEPTH ZSNOW 999.9 0 - 999.9 1990 TO PRESENT SNOW_DEPTH_QF ZSNOWQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT SNOW_COVER_PERCENT PSNOW 999 0 - 100 1990 TO PRESENT SNOW_COVER_PERCENT_QF PSNOWQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT SITE_TYPE SITETYPE 9 0,1,2,3 1994 TO PRESENT STRATUM_TYPE STRATUM 9 1,2,3,4,5,6,7 1988 TO PRESENT SUMMARY_CODE SUMCD 9 1,2,3,4,5 1993 TO PRESENT SUBSTRATE_CODE SBSTRATE 9 0,1,2,3,4 1993 TO PRESENT COVERAGE_CODE VEGCOVER 9 0,1,2,3 1993 TO PRESENT VEG_DENSITY VEGDENS 9 1,2 1993 TO PRESENT VEG_TYPE VEGTYPE a S,E,B,C 1993 TO PRESENT METHOD METHOD 9 1,2,3,4 1993 TO PRESENT UTM_ZONE UTMZONE 99 15,16 1993 TO PRESENT COORDINATES_NORTH_SOUTH NORTHING 9999999 0 - 9999999 1993 TO PRESENT COORDINATES_EAST_WEST EASTING 9999999 0 - 9999999 1993 TO PRESENT GIS_GRID_CODE GRIDCODE 99999.99999 SEE FIELD DESCRIPTIONS 1988 TO PRESENT ZONE15_NORTH_SOUTH Z15NORTH 9999999 0 - 9999999 1988 TO PRESENT ZONE15_EAST_WEST Z15EAST 9999999 0 - 9999999 1988 TO PRESENT FIELD_DERIVED_EASTING FLDEAST 9999999 0 - 9999999 1993 TO PRESENT FIELD_DERIVED_NORTHING FLDNORTH 9999999 0 - 9999999 1993 TO PRESENT EMTC_DERIVED_EASTING DRVEAST 9999999 0 - 9999999 1993 TO PRESENT EMTC_DERIVED_NORTHING DRVNORTH 9999999 0 - 9999999 1993 TO PRESENT ACCURACY ACCURACY 999.9 0 - 999.9 1993 TO PRESENT SAMPLE_TYPE SAMPTYPE c blank,1 1992 TO PRESENT STAGE_READING STAGE 999.9 0 - 999.9 1993 TO PRESENT RECORDER_CODE RCRDCODE cccc SEE FIELD DESCRIPTIONS 1993 TO PRESENT CREW_LEADER_CODE LDRCODE cccc SEE FIELD DESCRIPTIONS 1988 TO PRESENT SITE_COMMENT COMMENT c(240) SEE FIELD DESCRIPTIONS 1988 TO PRESENT ROW_SEQUENCE_NUMBER ROWNUM 9 1 - 6 1992 TO PRESENT SAMPLE_DEPTH Z 99.9 0 - 99.9 1988 TO PRESENT SAMPLE_DEPTH_QF ZQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT SAMPLE_DEPTH_CODE SAMPZCD aa SF,BT,MD,OT 1988 TO PRESENT CALC_SAMPLE_DEPTH_CODE CALCZCD aa SF,BT,MD,OT 1988 TO PRESENT WATER_TEMP TEMP 99.9 0 - 99.9 1988 TO PRESENT WATER_TEMP_QF TEMPQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT DISLV_OXYGEN DO 99.9 0 - 99.9 1988 TO PRESENT DISLV_OXYGEN_QF DOQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT PH PH 99.99 0 - 99.9 1991 TO PRESENT PH_QF PHQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT TURBIDITY TURB 9999 0 - 9999 1988 TO PRESENT TURBIDITY_QF TURBQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT SPECIFIC_CONDUCTIVITY COND 9999 0 - 9999 1988 TO PRESENT SPECIFIC_CONDUCTIVITY_QF CONDQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT WATER_VEL VEL 9.99 0 - 9.99 1988 TO PRESENT WATER_VEL_QF VELQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT WATER_CURRENT_DIRECTION DIR 999 0 - 360 1989 TO PRESENT WATER_CURRENT_DIRECTION_QF DIRQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,1993 TO PRESENT SAMPLE_BARCODE SMPLBAR 99999999 0 - 99999999 1993 TO PRESENT SNP_SAMPLE_FLAG SNPCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT NOX_SAMPLE_FLAG NOXCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT MET_SAMPLE_FLAG METCODE c blank,1,4,5,6,7,8,A,H,X 1991 TO PRESENT CL_SAMPLE_FLAG CLCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT SS_SAMPLE_FLAG SSCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT CHS_SAMPLE_FLAG CHSCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT CHF_SAMPLE_FLAG CHFCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT PYT_SAMPLE_FLAG PYTCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT TNP_SAMPLE_FLAG TNPCODE c blank,1,4,5,6,7,8,A,H,X 1993 TO PRESENT REPORT_CODE RPTCODE 9 1 - 5 1988 TO PRESENT SOLUBLE_REACTIVE_PHOSPHORUS SRP 9999.999 0 - 9999.999 1991 TO PRESENT SOLUBLE_REACTIVE_PHOSPHORUS_QF SRPQF 99999 0 - 65536 1991 TO PRESENT TOTAL_SOLUBLE_PHOSPHORUS TSP 9999.999 0 - 9999.999 1991 TO PRESENT TOTAL_SOLUBLE_PHOSPHORUS_QF TSPQF 99999 0 - 65536 1991 TO PRESENT TOTAL_PHOSPHORUS TP 9999.999 0 - 9999.999 1991 TO PRESENT TOTAL_PHOSPHORUS_QF TPQF 99999 0 - 65536 1991 TO PRESENT TOTAL_N TN 9999.999 0 - 9999.999 1991 TO PRESENT TOTAL_N_QF TNQF 99999 0 - 65536 1991 TO PRESENT TOTAL_SOLUBLE_N TSN 9999.999 0 - 9999.999 1991 TO PRESENT TOTAL_SOLUBLE_N_QF TSNQF 99999 0 - 65536 1991 TO PRESENT SUSPENDED_SOLIDS SS 999999.99 0 - 999999.99 1991 TO PRESENT SUSPENDED_SOLIDS_QF SSQF 99999 0 - 65536 1991 TO PRESENT ORGANIC_MATTER ORG 9999.9 0 - 9999.9 1991 TO PRESENT ORGANIC_MATTER_QF ORGQF 99999 0 - 65536 1991 TO PRESENT CHLOROPHYLL_S CHLS 999999.99 0 - 999999.99 1991 TO PRESENT CHLOROPHYLL_S_QF CHLSQF 99999 0 - 65536 1991 TO PRESENT PHAEOPHYTIN PHAEO 999999.99 0 - 999999.99 1991 TO PRESENT PHAEOPHYTIN_QF PHAEOQF 99999 0 - 65536 1991 TO PRESENT AMMONIUM_N NHX 9999.999 0 - 9999.999 1991 TO PRESENT AMMONIUM_N_QF NHXQF 99999 0 - 65536 1991 TO PRESENT NITRATE_NITRITE_N NOX 9999.999 0 - 9999.999 1991 TO PRESENT NITRATE_NITRITE_N_QF NOXQF 99999 0 - 65536 1991 TO PRESENT SILICA SI 9999.999 0 - 9999.999 1991 TO PRESENT SILICA_QF SIQF 99999 0 - 65536 1991 TO PRESENT DISLV_CALCIUM CA 9999.999 0 - 9999.999 1991 TO PRESENT DISLV_CALCIUM_QF CAQF 99999 0 - 65536 1991 TO PRESENT DISLV_IRON FE 9999.999 0 - 9999.999 1991 TO PRESENT DISLV_IRON_QF FEQF 99999 0 - 65536 1991 TO PRESENT DISLV_MANGENESE MN 9999.999 0 - 9999.999 1991 TO PRESENT DISLV_MANGENESE_QF MNQF 99999 0 - 65536 1991 TO PRESENT DISLV_POTASSIUM K 9999.999 0 - 9999.999 1991 TO PRESENT DISLV_POTASSIUM_QF KQF 99999 0 - 65536 1991 TO PRESENT CHLORIDE CL 99999.999 0 - 99999.999 1991 TO PRESENT CHLORIDE_QF CLQF 99999 0 - 65536 1991 TO PRESENT VOLATILE_SUS_SOLIDS VSS 999999.99 0 - 999999.99 1991 TO PRESENT VOLATILE_SUS_SOLIDS_QF VSS_QF 99999 0 - 65536 1991 TO PRESENT CHLOROPHYLL_FL1 CHLF 999999.9 0 - 999999.9 1993 TO PRESENT CHLOROPHYLL_FL1_QF CHLFQF 99999 0 - 65536 2002 TO PRESENT CHLOROPHYLL_FLI1 CHLFI 99999.99 0 - 99999.99 1993 TO PRESENT CHLOROPHYLL_FLI1_QF CHLFIQF 99999 0 - 65536 2002 TO PRESENT SODIUM NA 99999.9 0 - 99999.9 1994 TO PRESENT SODIUM_QF NAQF 99999 0 - 65536 1991 TO PRESENT MAGNESIUM MG 99999.9 0 - 99999.9 1994 TO PRESENT MAGNESIUM_QF MGQF 99999 0 - 65536 1991 TO PRESENT SULFATE SO4 99999.9 0 - 99999.9 1994 TO PRESENT SULFATE_QF SO4QF 99999 0 - 65536 1991 TO PRESENT HABITAT_CLASS HABCLASS ccccc SEE FIELD DESCRIPTIONS 1988 TO PRESENT INSTRUMENT_CODE INSTCODE cccccccc SEE FIELD DESCRIPTIONS 2000 TO PRESENT CROSS_LINK_BARCODE LINKBAR 99999999 0 - 99999999 2000 TO PRESENT INSTRUMENT_READING RAWNTU 9999 0 - 9999 2000 TO PRESENT INSTRUMENT_READING_QF RAWNTUQF c blank,0,1,2,3,4,5,6,7,8,A,C,D,H,2000 TO PRESENT CHLOROPHYLL_CALIBRATED CHLcal 99999.99999 0-999999.9 1993 TO PRESENT -------------------------------------------------------------------------------- Field Positions Field Name Position ----------------------------------------------------------------------------- BARCODE 1:8 FIELD_STATION_NUMBER 9:9 DATE_TIME 10:19 TIME_ONLY 20:24 NUMBER_OF_RECORDS 25:25 PROJECT_CODE 26:30 LOCATION_CODE 31:37 DBLKCD 38:44 WAVE_HEIGHT 45:47 WAVE_HEIGHT_QF 48:48 WATER_DEPTH 49:53 WATER_DEPTH_QF 54:54 ZMAX 55:59 SECCHI_DISK 60:62 SECCHI_DISK_QF 63:63 WAVE_CODE 64:64 ICE_DEPTH 65:70 ICE_DEPTH_QF 71:71 SUB_ICE_DEPTH 72:74 SUB_ICE_DEPTH_QF 75:75 ICE_COVER_PERCENT 76:78 ICE_COVER_PERCENT_QF 79:79 SNOW_DEPTH 80:85 SNOW_DEPTH_QF 86:86 SNOW_COVER_PERCENT 87:89 SNOW_COVER_PERCENT_QF 90:90 SITE_TYPE 91:91 STRATUM_TYPE 92:92 SUMMARY_CODE 93:93 SUBSTRATE_CODE 94:94 COVERAGE_CODE 95:95 VEG_DENSITY 96:96 VEG_TYPE 97:97 METHOD 98:98 UTM_ZONE 99:100 COORDINATES_NORTH_SOUTH 101:107 COORDINATES_EAST_WEST 108:114 GIS_GRID_CODE 115:125 ZONE15_NORTH_SOUTH 126:132 ZONE15_EAST_WEST 133:139 FIELD_DERIVED_EASTING 140:146 FIELD_DERIVED_NORTHING 147:153 EMTC_DERIVED_EASTING 154:160 EMTC_DERIVED_NORTHING 161:167 ACCURACY 168:172 SAMPLE_TYPE 173:173 STAGE_READING 174:178 RECORDER_CODE 179:182 CREW_LEADER_CODE 183:186 SITE_COMMENT 187:426 ROW_SEQUENCE_NUMBER 427:427 SAMPLE_DEPTH 428:432 SAMPLE_DEPTH_QF 433:433 SAMPLE_DEPTH_CODE 434:435 CALC_SAMPLE_DEPTH_CODE 436:437 WATER_TEMP 438:441 WATER_TEMP_QF 442:442 DISLV_OXYGEN 443:446 DISLV_OXYGEN_QF 447:447 PH 448:452 PH_QF 453:453 TURBIDITY 454:457 TURBIDITY_QF 458:458 SPECIFIC_CONDUCTIVITY 459:462 SPECIFIC_CONDUCTIVITY_QF 463:463 WATER_VEL 464:467 WATER_VEL_QF 468:468 WATER_CURRENT_DIRECTION 469:471 WATER_CURRENT_DIRECTION_QF 472:472 SAMPLE_BARCODE 473:480 SNP_SAMPLE_FLAG 481:481 NOX_SAMPLE_FLAG 482:482 MET_SAMPLE_FLAG 483:483 CL_SAMPLE_FLAG 484:484 SS_SAMPLE_FLAG 485:485 CHS_SAMPLE_FLAG 486:486 CHF_SAMPLE_FLAG 487:487 PYT_SAMPLE_FLAG 488:488 TNP_SAMPLE_FLAG 489:489 REPORT_CODE 490:490 SOLUBLE_REACTIVE_PHOSPHORUS 491:498 SOLUBLE_REACTIVE_PHOSPHORUS_QF 499:503 TOTAL_SOLUBLE_PHOSPHORUS 504:511 TOTAL_SOLUBLE_PHOSPHORUS_QF 512:516 TOTAL_PHOSPHORUS 517:524 TOTAL_PHOSPHORUS_QF 525:529 TOTAL_N 530:537 TOTAL_N_QF 538:542 TOTAL_SOLUBLE_N 543:550 TOTAL_SOLUBLE_N_QF 551:555 SUSPENDED_SOLIDS 556:564 SUSPENDED_SOLIDS_QF 565:569 ORGANIC_MATTER 570:575 ORGANIC_MATTER_QF 576:580 CHLOROPHYLL_A 581:589 CHLOROPHYLL_A_QF 590:594 PHAEOPHYTIN 595:603 PHAEOPHYTIN_QF 604:608 AMMONIUM_N 609:616 AMMONIUM_N_QF 617:621 NITRATE_NITRITE_N 622:629 NITRATE_NITRITE_N_QF 630:634 SILICA 635:642 SILICA_QF 643:647 DISLV_CALCIUM 648:655 DISLV_CALCIUM_QF 656:660 DISLV_IRON 661:668 DISLV_IRON_QF 669:673 DISLV_MANGENESE 674:681 DISLV_MANGENESE_QF 682:686 DISLV_POTASSIUM 687:694 DISLV_POTASSIUM_QF 695:699 CHLORIDE 700:708 CHLORIDE_QF 709:713 VOLATILE_SUS_SOLIDS 714:722 VOLATILE_SUS_SOLIDS_QF 723:727 CHLOROPHYLL_FL1 728:735 CHLOROPHYLL_FL1_QF 736:740 CHLOROPHYLL_FLI1 741:748 CHLOROPHYLL_FLI1_QF 749:753 SODIUM 754:760 SODIUM_QF 761:765 MAGNESIUM 766:772 MAGNESIUM_QF 773:777 SULFATE 778:784 SULFATE_QF 785:789 HABITAT_CLASS 790:794 INSTRUMENT_CODE 795:802 CROSS_LINK_BARCODE 803:810 INSTRUMENT_READING 811:814 INSTRUMENT_READING_QF 815:815 CHLOROPHYLL_CAL 816:826 -------------------------------------------------------------------------------- Field Descriptions BARCODE Identifying barcode for water data sheets. FIELD STATION NUMBER Numeric code identifying the field station number. Listed below are the valid codes and their corresponding field station 1 = Lake City, MN 4 = Brighton, IL 2 = Onalaska, WI 5 = Jackson, MO 3 = Bellevue, IA 6 = Havana, IL DATE Date on which a sample collection was initiated. mm/dd/yyyy format, example April 1, 2000, is represented as 04/01/2000. TIME 2400-h (military) Central Standard Time (CST) at which a sample collection began. SAMPLES Number of samples collected at the site location. PROJECT CODE Alphanumeric LTRM project code. Format is A-nnn, where A is a letter describing project type and nnn is a special project number. Project types are as follows: M = RTA standardized resource monitoring B = HREP biological response monitoring E = Ad hoc exploratory sampling R = Special research project LOCATION CODE Alphanumeric code for LTRMP Location Code having the format annn.na or YYFTNNN. Permanent fixed sites use the annn.na format where the leading a designates the river (M = Mississippi and I = Illinois), nnn.n is the river mile (recorded to the nearest 0.1 mile), and the trailing a is an alphabetic code for the relative lateral position across the floodplain. Random sites use the YYFTNNN format. This format is described below. YYYY = Year the site was visited F = Field station number of site (see FIELD STATION NUMBER description) T = Time period code site was visited. Valid codes are as follows: 1 = March thru May 2 = June thru August 3 = September thru November 4 = December thru February NNN = Site number derived from a sampling map or site list. DATA BLOCK CODE Old administrative field used to help identify the location and time of a collection sample (stopped using June 1993). WAVE HEIGHT Vertical distance between the highest and lowest point on a wave form, using the Beaufort wind/sea-state scale. WAVE CODE replaced this field in mid-1993. WAVE HEIGHT QF Wave height measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional WATER DEPTH The vertical distance (to the nearest 0.1 m) between the substrate and the free water surface or, if ice exists, the vertical distance between the substrate and the lower surface of the ice. The same as ZMAX (see Below) when ice is not present. Z MAX QF Water depth measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional ZMAX The vertical distance (to the nearest 0.1 m) between the substrate and the free water surface. Same as Water Depth (see above) when ice is not present. Zmax is recorded as zero when the water is frozen to the substrate (no free water surface exists or cannot be reliably determined). SECCHI The vertical distance below the water surface at which a secchi disk disappears from view. Recorded in centimeters. SECCHI QF Secchi measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional WAVE CODE Visual determination of wave type using the Beaufort scale. Valid codes are as follows: 0 = Glass 1 = Ripple 2 = Wavelet 3 = White caps 4 = Rough Z ICE Vertical thickness of ice. Only the portion of the frozen block that represents the water column within the ice block is measured as ice depth. Reported in centimeters. Z ICE QF Ice thickness measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional Z S ICE Submerged thickness of ice measured to the nearest centimeter. Not recorded until mid-1993. Z S ICE QF Submerged ice thickness measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional % ICE Estimate of the percentage of water surface covered by ice within a 200 meter radius of the collection site. % ICE QF Ice percentage measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional Z SNOW Vertical thickness of snow on the ice reported in centimeters. Z SNOW QF Snow thickness measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement H = Hold Time Exceeded X = Parameter Optional D = Cal Off Excessive % SNOW Estimate of the percentage of water surface covered by snow within a 200 meter radius of the collection site. % SNOW F Snow percentage measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional SITE TYPE Identifies the physical type of collection site. Valid types are as follows: 0 = Primary 1 = Alternate 2 = Fixed 3 = Other STRATUM TYPE Aquatic area/Land use description code for the collection site. Valid codes are as follows: 1 = Main channel 2 = Side channel 3 = Backwater area contiguous to the main channel 4 = Lake Pepin or Swan Lake 5 = Impounded 6 = Isolated 7 = New Terrestrial 9 = Unexploded Ordinance Area - Pool 13 SUMMARY CODE Circumstances surrounding the decision to accept or reject a site sample (replaced by QF codes in mid-1993). Valid codes are as follows: 1 = One or more of the data values for this site sample are suspected or known to be in error. 2 = Possible equipment malfunction. 3 = Data potentially non-representative of that habitat type due to local, short-term conditions. 4 = Post-entry data analysis suggests that this observation may be atypical, but no reporting or transcription errors have been identified. 5 = No apparent problems. SUBSTRATE CODE A qualitative description code of substrate sediments. Started in mid-1993. Valid codes are as follows: 0 = Clay 1 = Silt 2 = Silt/Clay/Sand 3 = Sand 4 = Hard COVERAGE CODE Determination of the relative abundance of emergent and submergent aquatic vegetation, estimated as a percent. Valid codes are as follows: 0 = 0% 1 = 1 - 19% 2 = 20 - 49% 3 = >50% VEG DENSITY Subjective visual determination of the relative density of emergent and submergent aquatic vegetation. Valid codes are as follows: 1 = Sparse 2 = Dense VEG TYPE Determination of the type of emergent and/or submergent aquatic vegetation. Valid codes are as follows: S = Submergent E = Emergent F = Floating B = Both submergent and emergent C = Any combination of submergent, emergent, and floating METHOD Numeric code specifying the method used to locate the collection site, as follows: 1 = UTMs recorded from cross-reference between base map and site features 2 = UTMs recorded from GPS device (Magellan) 3 = Latitude (N/S coordinates; degrees, minutes, seconds) and longitude (E/W coordinates; degrees, minutes, seconds) recorded from GPS (Loran) 4 = Latitude and longitude recorded from cross-reference between base map and site features 5 = Differential GPS UTM ZONE Numeric field to record Global Positioning System (GPS) zone. LTRMP data resides in either zone 15 or 16. COORDINATES NORTH SOUTH Universal transverse mercator (UTM North American 1983 datum) northing coordinate for a water quality sampling site (in meters). Proper interpretation of this coordinaterequires reference to the appropriate UTM zone (15 or 16 for LTRM). This is the initially assigned and registered UTM northing for an LTRM sampling site. COORDINATES EAST WEST Universal transverse mercator (UTM North American 1983 datum) easting coordinate for a water quality sampling site (in meters). Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRM). This is the initially assigned and registered UTM easting for an LTRM sampling site. GIS GRID CODE Modified and concatenated utm coordinate pair used to generalize site locations within a 50 square meter area. ZONE15 NORTH SOUTH Universal transverse mercator (UTM North American 1983 datum) northing coordinate for a water quality sampling site (in meters) referenced to a single UTM zone (15). This value is calculated from coordinates_east_west and is particularly useful for LTRM areas that include both UTM zone 15 and UTM zone 16. ZONE15 EAST WEST Universal transverse mercator (UTM North American 1983 datum) easting coordinate for a water quality sampling site (in meters) referenced to a single UTM zone (15). This value is calculated from coordinates_east west and is particularly useful for LTRM areas that include both UTM zone 15 and UTM zone 16. FIELD DERIVED EASTING Universal transverse mercator (UTM North American 1983 datum) easting coordinate for a water quality sampling site (in meters) as reported from the field. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRM). LTRM procedures call for a value in this field only when a sample is collected at a location that differs significantly from the pre-assigned or registered coordinates. FIELD DERIVED NORTHING Universal transverse mercator (UTM North American 1983 datum) northing coordinate for a water quality sampling site (in meters) as reported from the field. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRM). LTRM procedures call for a value in this field only when a sample is collected at a location that differs significantly from the pre-assigned or registered coordinates. UMESC DERIVED EASTING Universal transverse mercator (UTM North American 1983 datum) easting coordinate for a water quality sampling site (in meters) as preassigned by UMESC. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRM). UMESC preassigns coordinates for stratified random sampling (SRS) only. For SRS sites, this coordinate is also the initial assignment for Coordinates east west. UMESC DERIVED NORTHING Universal transverse mercator (UTM North American 1983 datum) northing coordinate for a water quality sampling site (in meters) as preassigned by UMESC. Proper interpretation of this coordinate requires reference to the appropriate UTM zone (15 or 16 for LTRM). UMESC preassigns coordinates for stratified random sampling (SRS) only. For SRS sites, this coordinate is also the initial assignment for Coordinates north south. ACCURACY Numeric field to record a measure of positioning accuracy. Record Percent Dilution of Precision (PDOP) from GPS devices and the following codes for base map cross-reference and revisits to marked fixed sites: 000.1 = Almost certain accuracy within 100 m because of immediate proximity to uniquely identifiable features (undisturbed marker, wing dam, day mark, etc.). 000.2 = High confidence of accuracy within 100 m because of agreement between general site appearance and identifiable features on a base map. 000.3 = Other than above. SAMPLE TYPE Indicates the types of samples collected. Valid codes are as follows: Blank = Normal sampling 1 = QA sampling STAGE READING The height of the water surface above the National Geodetic Vertical Datum, and is controlled by dam operations. Measured in feet. RECORDER CODE Alphanumeric field to identify the LTRM recorder responsible for recording of this data. These codes are permanently assigned to LTRM staff at each station. CREW LEADER CODE Alphanumeric field to identify the LTRM Crew Leader responsible for recording of this data. These codes are permanently assigned to LTRM staff at each station. SITE COMMENT Two Hundred Forty-character field to record miscellaneous comments and observations. SAMPLE ROW NUMBER Numeric field to identify, isolate, and sort individual detail records. Z The vertical distance (to the nearest 0.1m) between the free water surface and the point of sample collection or ambient measurement. When ice is present, the following conventions are used to record Z: (1) samples collected more than 25 cm below the bottom of the ice are assigned a z value in the usual manner as described above, (2) samples collected 16-25 cm below the ice are assigned a z value of 0.2 m. (3) Samples collected between 0 and 14 cm below the ice are assigned a z value of 0.1m, and (4) samples collected above the lower level of the ice (i.e., in the access hole) are assigned a z value of zero. Z QF Sample depth measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional SAMPLE DEPTH CODE Subjective description of water depth at which sample depth was taken. Valid codes are as follows: SF = Surface MD = Middle BT = Bottom OT = Other CALCULATED SAMPLE DEPTH CODE Administrative field. Derived from comparing sample depth against Z MAX. Used as a comparison check against sample depth code. Valid codes are as follows: SF = Surface MD = Middle BT = Bottom OT = Other TEMP Water temperature for the sample measured in degrees Celsius. TEMP QF Water temperature measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional DO Amount of Dissolved Oxygen in the sample. Measured in milligrams/liter. DO QF Dissolved oxygen measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement H = Hold Time Exceeded X = Parameter Optional D = Cal Off Excessive PH pH measurement for the sample. Measured in pH units. PH QF pH measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional TURB Turbidity (water clarity) measurement for the sample. Measured in nephelometric turbidity to the nearest whole nephelometric techniques. TURB QF Turbidity measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional COND Conductivity (ability of the water to conduct an electric current) measurement for the sample. Measured to the nearest uS/cm. COND QF Conductivity measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional VEL Velocity of water current. Measured in meters per second. VEL QF Velocity measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional DIR Compass direction from which the water current is flowing. Measured in degrees. DIR QF Current direction measurement quality factor code. Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional SAMPLE BARCODE Identifying barcode for a water sample to be used for future chemical analysis. FILTERED SNP Code to indicate if future chemical analysis is to be done for soluble nitrogen and phosphorus. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED NOX Code to indicate if future chemical analysis is to be done for nitrate and/or nitrite. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED MET Code to indicate if future chemical analysis is to be done for metals. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED CL Code to indicate if future chemical analysis is to be done for chloride. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED SS Code to indicate if future chemical analysis is to be done for suspended solids. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED CHS Code to indicate if future chemical analysis is to be done for spectrophotometric chlorophylla. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional FILTERED CHF Code to indicate if future chemical analysis is to be done for fluorometric chlorophylla. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional UNFILTERED PYT Code to indicate if future chemical analysis is to be done for phytoplankton. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional UNFILTERED TNP Code to indicate if future chemical analysis is to be done for total nitrogen and phosphorus. Valid codes are as follows: Blank = No sample 1 = Sample OK 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample unrepresentative 7 = Sample possibly contaminated 8 = Sample Diluted A = Non-Standard Method H = Hold Time Exceeded X = Parameter Optional REPORT CODE Numeric code documenting the overall quality of a specific sample as described below: 1 = Gear failure; site may be re-sampled within time period 2 = Site cannot be sampled (i.e., site is dry or inaccessible) 3 = Sample collected under unusual environmental conditions 4 = Weighing equipment may be in error due to wind and waves 5 = Normally completed sample; all LTRMP procedures followed 6 = Non-critical gear modification (e.g., fyke net lead shortened) 7 = Pseudo-shoreline used for shoreline gear 8 = Minor gear damage or noncritical gear failure SOLUBLE REACTIVE PHOSPHORUS Soluble reactive phosphorus measurement for the sample. Reported as milligrams of phosphorus per liter. TOTAL SOLUBLE PHOSPHORUS Total soluble phosphorus measurement for the sample. Measured in milligrams per liter. TOTAL PHOSPHORUS The total amount of phosphorus (dissolved and particulate) in the sample determined using persulfate digestion. Reported as milligrams of phosphorus per liter. TOTAL NITROGEN The total nitrogen concentration (dissolved and particulate) in the sample. Reported as milligrams of nitrogen per liter. TOTAL SOLUBLE N The total soluble nitrogen concentration for the sample. Measured in milligrams per liter. SUSPENDED SOLIDS The total particulate material trapped by a glass fiber filter and dried at 105 degrees Centigrade. Reported as milligrams per liter. ORGANIC MATTER Organic matter measurement for the sample. This is not yet measured and units have not yet been determined. CHLOROPHYLL S The concentration of photosynthetic pigment chlorophyll-a, corrected for phaeophytin as determined by the spectrophotometric technique using 90% acetone extraction. Measured in micrograms per liter. PHAEOPHYTIN Phaeophytin is a degradation product of chlorophyll as detected by the spectrophotometric technique for the sample. Measured in micrograms per liter. AMMONIUM N The total amount of ammonia (ionized and non-ionized) for the sample. Measured in milligrams of nitrogen per liter. NITRATE NITRITE The total amount of nitrate plus nitrite for the sample. Measured in milligrams of nitrogen per liter. SILICA The total amount of silica for the sample. Measured in Si milligrams per liter. DISSOLVED CALCIUM The total amount of calcium for the sample. Measured in milligrams per liter. DISSOLVED IRON The total amount of iron for the sample. Measured in milligrams per liter. DISSOLVED MANGENESE The total amount of mangenese for the sample. Measured in milligrams per liter. DISSOLVED POTASSIUM The total amount of potassium for the sample. Measured in milligrams per liter. CHLORIDE The total amount of chloride for the sample. Measured in milligrams per liter. VOLATILE SUSPENDED SOLIDS The weight loss on combustion at 500 - 500 degrees Centigrade of the total suspended solids residue for the sample. Reported in milligrams per liter. CHLOROPHYLL FL1 Uncalibrated fluorometric chlorophyll. Values must be compared to spectrophotometric measurements of chlorophyll a (see above) to develop specific calibration factors. Approximate calibration equation is: Chlorophyll a = 1.9 + 0.9####FL1. Units of Chlorophyll and FL1 are both micrograms per liter. CHLOROPHYLL FLI1 Uncalibrated fluorometric reading after acidification - for determination of phaeophytin. Can be compared/combined with Chlorophyll FL1 (above) to assess phaeophytin concentration. SODIUM The concentration (milligrams/Liter) of sodium ions in the sample. MAGNESIUM The concentration (milligrams/Liter) of magnesium ions in the sample. SULFATE The concentration of sulfate (S04) ions in the sample expressed as milligrams per liter. HABITAT CLASS Alphabetic code LTRMP habitat class description: BWC-O = Backwater contiguous - open water BWC-V = Backwater contiguous - vegetated water BWI-O = Backwater isolated - open water BWI-V = Backwater isolated - vegetated water IMP-L = Impounded - lakelike IMP-O = Impounded - open water IMP-V = Impounded - vegetated water CBU = Main channel border unstructured CBW = Main channel border wingdam CTR = Main channel trough SCU = Side channel border unstructured SCT = Side channel trough TWB = Tailwater channel border TWW = Tailwater wingdam TRIB = Tributary TRBM = Tributary mouth UXO = Unexpoded Ordinance Instrument Code Serial number of instrument used for sample readings Cross Link Barocde Barcode used to link Water Quality data to other LTRMP components RAWTURB Turbidity reading prior to standardized dilution methods. Measured in nephelometric turbidity units. RAWTURB QF Valid codes are as follows: Blank = No problems 0 = Equipment inoperative 1 = Equipment questionable 2 = Reading Off-Scale Hi 3 = Reading Off-Scale Lo 4 = Sample Returned to Lab 5 = Sample Unusable or Unobtainable 6 = Sample Unrepresentative 7 = Sample Possibly Contaminated 8 = Sample Diluted A = Non-Standard Method C = Category Measurement D = Cal Off Excessive H = Hold Time Exceeded X = Parameter Optional CHLOROPHYLL Calibrated Calibrated fluorometric chlorophyll a. Fluorometric chlorophyll a values generated by calibration of fluorometric chlorophyll readings (“CHLF”) to season and year specific measurements of spectrophotometric chlorophyll (“CHLS”). Data from sites where CHLS and CHLF are both collected are used to build river-specific calibration curves for these data. Values are corrected for pheophytin. Units are micrograms per liter. CHLcal values are not available for "fixed" sampling sites prior to 1998, for which only CHLS was measured.