1 STATION NAME: St. Croix River at railroad bridge at Hudson, WI STATION NUMBER: SC-17 DRAINAGE AREA: 7401.0 SQUARE MILES CONSTITUENT: Total Nitrogen LOAD ESTIMATES FOR 19670101 TO 19961231 TOTAL NUMBER OF OBS.: 141 NUMBER OF UNCENSORED OBS.: 141 CALIBRATION DATA PERIOD OF RECORD: 1979 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6339. 1305. 2370. 2989. 4127. 7478. 13212. 37952. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6014. 1063. 2206. 2835. 3985. 6831. 12334. 50405. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 2.0736E+01 + 1.0311E+00 LN(FLOW) + 4.0115E-02 SIN(DECTIME) + 4.6238E-02 COS(DECTIME) - 9.7469E-03 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.057 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 30.67 ( 25 DF) PROBABILITY LEVEL = 0.200 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 2.0736E+01 + 1.0311E+00 LN(FLOW) + 4.0115E-02 SIN(DECTIME) + 4.6238E-02 COS(DECTIME) - 9.7469E-03 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.057 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 2.0797E+01 + 1.0333E+00 LN(FLOW) + 3.2550E-02 SIN(DECTIME) + 6.2960E-02 COS(DECTIME) - 9.8066E-03 DECTIME NOTE: AIKAIKE INFORMATION CRITERION AND SCHWARZ POSTERIOR PROBABILITY CRITERIA DID NOT SELECT SAME BEST FIT MODEL. MODEL SELECTED ON BASIS OF AIKAIKE INFORMATION CRITERION. 1 STATION: St. Croix River at railroad bridge at Hudson, WI (CONTINUED) STATION NUMBER: SC-17 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 17. 29. 15. 15. 9. STD DEV LOAD (TON/DAY) 1. 1. 1. 1. 0. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 1. 1. 1. 1. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 8. 11. 19. 34. 49. 95. 166. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 17. 29. 15. 15. 9. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 1. 1. 1. 1. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 8. 11. 19. 35. 49. 95. 167. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 17. 29. 15. 15. 10. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 1. 1. 1. 1. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 8. 11. 19. 35. 49. 95. 166. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 16. 1 STATION NAME: St. Croix River at railroad bridge at Hudson, WI STATION NUMBER: SC-17 DRAINAGE AREA: 7401.0 SQUARE MILES CONSTITUENT: Nitrate + Nitrite LOAD ESTIMATES FOR 19670101 TO 19961231 TOTAL NUMBER OF OBS.: 181 NUMBER OF UNCENSORED OBS.: 181 CALIBRATION DATA PERIOD OF RECORD: 1976 TO 1996 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6210. 1305. 2161. 2858. 3985. 7205. 12808. 37952. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6014. 1063. 2206. 2835. 3985. 6831. 12334. 50405. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 2.3649E+01 + 6.3549E+00 LN(FLOW) - 3.0019E-01 LN(FLOW)**2 + 2.6280E-01 SIN(DECTIME) + 1.1322E+00 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.433 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 48.68 ( 33 DF) PROBABILITY LEVEL = 0.039 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 2.3649E+01 + 6.3549E+00 LN(FLOW) - 3.0019E-01 LN(FLOW)**2 + 2.6280E-01 SIN(DECTIME) + 1.1322E+00 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.433 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 2.3672E+01 + 6.3619E+00 LN(FLOW) - 3.0042E-01 LN(FLOW)**2 + 2.9462E-01 SIN(DECTIME) + 1.2036E+00 COS(DECTIME) 1 STATION: St. Croix River at railroad bridge at Hudson, WI (CONTINUED) STATION NUMBER: SC-17 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 4.40 6.10 1.30 4.40 5.90 STD DEV LOAD (TON/DAY) 0.31 0.58 0.10 0.46 0.59 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 1. 1. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 3. 6. 9. 12. 17. 26. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 4.40 6.00 1.30 4.30 5.80 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 1. 1. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 3. 6. 9. 12. 17. 25. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 4.60 6.30 1.20 4.50 6.30 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 1. 1. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 3. 7. 10. 12. 18. 28. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 3.6 1 STATION NAME: St. Croix River at railroad bridge at Hudson, WI STATION NUMBER: SC-17 DRAINAGE AREA: 7401.0 SQUARE MILES CONSTITUENT: Total Ammonia LOAD ESTIMATES FOR 19670101 TO 19961231 TOTAL NUMBER OF OBS.: 281 NUMBER OF UNCENSORED OBS.: 176 CALIBRATION DATA PERIOD OF RECORD: 1967 TO 1996 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6136. 1305. 2258. 2870. 3961. 7003. 12808. 37952. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6014. 1063. 2206. 2835. 3985. 6831. 12334. 50405. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 7.5609E+01 + 9.9121E-01 LN(FLOW) - 3.8433E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.369 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 95.76 ( 53 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.2061E+02 + 9.9549E-01 LN(FLOW) - 6.1067E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.339 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 1.0506E+02 + 9.7458E-01 LN(FLOW) - 5.3091E-02 DECTIME 1 STATION: St. Croix River at railroad bridge at Hudson, WI (CONTINUED) STATION NUMBER: SC-17 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.00 3.20 1.80 1.80 1.10 STD DEV LOAD (TON/DAY) 0.10 0.22 0.09 0.08 0.05 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 0. 0. 0. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 1. 2. 4. 6. 12. 24. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.70 4.40 2.50 2.40 1.50 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 0. 0. 0. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 3. 5. 8. 18. 41. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.50 4.10 2.40 2.30 1.40 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 0. 0. 0. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 3. 5. 7. 16. 35. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 1.4 - 2.5 1 STATION NAME: St. Croix River at railroad bridge at Hudson, WI STATION NUMBER: SC-17 DRAINAGE AREA: 7401.0 SQUARE MILES CONSTITUENT: Total Phosphorus LOAD ESTIMATES FOR 19670101 TO 19961231 TOTAL NUMBER OF OBS.: 269 NUMBER OF UNCENSORED OBS.: 266 CALIBRATION DATA PERIOD OF RECORD: 1967 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6039. 1305. 2218. 2847. 3961. 6992. 11979. 37952. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6014. 1063. 2206. 2835. 3985. 6831. 12334. 50405. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.7135E+01 + 2.8772E+00 LN(FLOW) - 9.5245E-02 LN(FLOW)**2 - 6.2049E-02 SIN(DECTIME) - 1.1677E-01 COS(DECTIME) - 3.3963E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.327 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 105.51 ( 50 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.6473E+01 + 2.8615E+00 LN(FLOW) - 9.4471E-02 LN(FLOW)**2 - 6.0368E-02 SIN(DECTIME) - 1.1658E-01 COS(DECTIME) - 3.3589E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.324 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 5.1626E+01 + 1.6556E+00 LN(FLOW) - 2.7930E-02 LN(FLOW)**2 - 8.8190E-02 SIN(DECTIME) - 1.2489E-01 COS(DECTIME) - 2.8427E-02 DECTIME NOTE: AIKAIKE INFORMATION CRITERION AND SCHWARZ POSTERIOR PROBABILITY CRITERIA DID NOT SELECT SAME BEST FIT MODEL. MODEL SELECTED ON BASIS OF AIKAIKE INFORMATION CRITERION. 1 STATION: St. Croix River at railroad bridge at Hudson, WI (CONTINUED) STATION NUMBER: SC-17 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.30 2.20 1.30 1.20 0.52 STD DEV LOAD (TON/DAY) 0.07 0.18 0.08 0.08 0.04 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 0. 0. 0. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 1. 3. 4. 8. 16. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.40 2.30 1.40 1.20 0.56 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 0. 0. 0. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 2. 3. 4. 9. 18. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.30 2.20 1.40 1.20 0.55 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 0. 0. 0. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 1. 1. 3. 4. 9. 20. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 1.4 1 STATION NAME: St. Croix River at railroad bridge at Hudson, WI STATION NUMBER: SC-17 DRAINAGE AREA: 7401.0 SQUARE MILES CONSTITUENT: Total Suspended Solids LOAD ESTIMATES FOR 19670101 TO 19961231 TOTAL NUMBER OF OBS.: 272 NUMBER OF UNCENSORED OBS.: 268 CALIBRATION DATA PERIOD OF RECORD: 1967 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6075. 1305. 2229. 2841. 3973. 7006. 12228. 37952. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 6014. 1063. 2206. 2835. 3985. 6831. 12334. 50405. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.2207E+01 + 1.1234E+00 LN(FLOW) - 2.9996E-01 SIN(DECTIME) - 5.6196E-01 COS(DECTIME) - 2.5277E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.496 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 63.89 ( 51 DF) PROBABILITY LEVEL = 0.106 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.2387E+01 + 1.1194E+00 LN(FLOW) - 2.9604E-01 SIN(DECTIME) - 5.5549E-01 COS(DECTIME) - 2.5348E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.491 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 5.2211E+01 + 1.0546E+00 LN(FLOW) - 2.6781E-01 SIN(DECTIME) - 4.7988E-01 COS(DECTIME) - 2.4959E-02 DECTIME 1 STATION: St. Croix River at railroad bridge at Hudson, WI (CONTINUED) STATION NUMBER: SC-17 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 110. 160. 150. 100. 28. STD DEV LOAD (TON/DAY) 7. 14. 11. 9. 2. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 4. 6. 8. 11. 12. 14. 18. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 8. 33. 66. 127. 240. 350. 716. 2387. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 110. 160. 160. 100. 29. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 4. 6. 9. 11. 12. 15. 18. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 8. 34. 68. 130. 246. 359. 733. 2440. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 110. 150. 140. 99. 32. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 4. 6. 8. 10. 12. 14. 15. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 10. 37. 68. 125. 227. 325. 643. 1945. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 110. 1 STATION NAME: St. Croix River at railroad bridge at Hudson, WI STATION NUMBER: SC-17 DRAINAGE AREA: 7401.0 SQUARE MILES CONSTITUENT: Total Chloride LOAD ESTIMATES FOR 19670101 TO 19771231 TOTAL NUMBER OF OBS.: 112 NUMBER OF UNCENSORED OBS.: 106 CALIBRATION DATA PERIOD OF RECORD: 1967 TO 1977 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 5669. 1566. 2087. 2615. 3801. 5963. 11652. 37003. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 5837. 1063. 2052. 2669. 3582. 5977. 12097. 50405. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.0529E+02 + 8.2253E-01 LN(FLOW) + 5.5635E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.335 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 34.68 ( 19 DF) PROBABILITY LEVEL = 0.015 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 9.7396E+01 + 8.3515E-01 LN(FLOW) + 5.1584E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.321 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 3.0976E+01 + 8.8250E-01 LN(FLOW) + 1.7735E-02 DECTIME 1 STATION: St. Croix River at railroad bridge at Hudson, WI (CONTINUED) STATION NUMBER: SC-17 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 60. 89. 56. 57. 38. STD DEV LOAD (TON/DAY) 4. 9. 4. 4. 2. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 4. 4. 5. 6. 6. 6. 7. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 13. 32. 43. 68. 115. 157. 275. 384. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 63. 94. 59. 59. 39. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 4. 4. 5. 6. 6. 7. 7. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 14. 33. 44. 71. 121. 167. 297. 411. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 65. 99. 61. 60. 39. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 4. 4. 5. 5. 5. 5. 6. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 16. 33. 44. 70. 129. 183. 326. 452. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 63. - 64.