1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Total Nitrogen LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 113 NUMBER OF UNCENSORED OBS.: 113 CALIBRATION DATA PERIOD OF RECORD: 1978 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3673. 53. 275. 556. 1840. 3890. 9472. 26800. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 2.5911E+01 + 3.0607E+00 LN(FLOW) - 1.1941E-01 LN(FLOW)**2 + 1.2207E-01 SIN(DECTIME) + 1.6786E-01 COS(DECTIME) - 1.5680E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.258 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 34.61 ( 19 DF) PROBABILITY LEVEL = 0.016 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 2.5911E+01 + 3.0607E+00 LN(FLOW) - 1.1941E-01 LN(FLOW)**2 + 1.2207E-01 SIN(DECTIME) + 1.6786E-01 COS(DECTIME) - 1.5680E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.258 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 2.4489E+01 + 3.1303E+00 LN(FLOW) - 1.2340E-01 LN(FLOW)**2 + 5.4206E-02 SIN(DECTIME) + 8.6887E-02 COS(DECTIME) - 1.5074E-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: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 61. 110. 59. 38. 40. STD DEV LOAD (TON/DAY) 5. 10. 6. 4. 4. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 4. 6. 8. 9. 9. 10. 11. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 6. 26. 78. 176. 253. 401. 652. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 60. 110. 57. 38. 39. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 4. 6. 8. 9. 9. 10. 11. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 6. 26. 77. 172. 248. 396. 655. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 60. 100. 63. 39. 36. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 4. 6. 8. 8. 9. 9. 10. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 6. 25. 77. 178. 251. 393. 633. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 58. 1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Total Nitrate + Nitrite LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 118 NUMBER OF UNCENSORED OBS.: 105 CALIBRATION DATA PERIOD OF RECORD: 1977 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3844. 53. 283. 605. 1905. 4115. 9964. 26800. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.6519E+01 + 5.6115E+00 LN(FLOW) - 2.6673E-01 LN(FLOW)**2 + 3.0477E-01 SIN(DECTIME) + 5.2482E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 1.493 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 57.80 ( 20 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.4572E+01 + 5.1475E+00 LN(FLOW) - 2.3942E-01 LN(FLOW)**2 + 2.8708E-01 SIN(DECTIME) + 4.9383E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 1.382 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 1.2875E+01 + 4.9424E+00 LN(FLOW) - 2.3638E-01 LN(FLOW)**2 + 1.1608E-01 SIN(DECTIME) + 2.2125E-01 COS(DECTIME) WARNING: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 80. 150. 52. 45. 68. STD DEV LOAD (TON/DAY) 15. 35. 12. 11. 15. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 2. 6. 10. 15. 17. 19. 21. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 27. 110. 225. 330. 552. 708. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 66. 130. 45. 38. 55. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 2. 5. 9. 12. 13. 15. 16. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 23. 89. 189. 274. 468. 632. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 49. 85. 45. 32. 35. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 5. 7. 8. 9. 9. 10. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 4. 23. 73. 146. 187. 254. 297. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 41. 1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Dissolved Ammonia LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 96 NUMBER OF UNCENSORED OBS.: 88 CALIBRATION DATA PERIOD OF RECORD: 1979 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 4031. 53. 264. 543. 1945. 4423. 13840. 26800. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.0303E+02 + 1.2660E+00 LN(FLOW) + 6.2181E-01 SIN(DECTIME) + 7.5877E-01 COS(DECTIME) - 5.3349E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 1.183 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 19.28 ( 16 DF) PROBABILITY LEVEL = 0.254 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 9.9160E+01 + 1.2487E+00 LN(FLOW) + 5.5132E-01 SIN(DECTIME) + 7.2082E-01 COS(DECTIME) - 5.1308E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 1.149 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 1.0033E+02 + 1.3939E+00 LN(FLOW) + 3.2211E-01 SIN(DECTIME) + 8.3399E-01 COS(DECTIME) - 5.2493E-02 DECTIME 1 STATION: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.00 4.50 0.83 0.74 1.70 STD DEV LOAD (TON/DAY) 0.39 1.00 0.19 0.18 0.38 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. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 2. 4. 8. 25. 64. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.00 4.60 0.94 0.85 1.80 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. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 2. 5. 8. 25. 66. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.60 5.40 1.20 1.40 2.40 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 2. 6. 11. 34. 91. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 1.7 1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Total Phosphorus LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 115 NUMBER OF UNCENSORED OBS.: 115 CALIBRATION DATA PERIOD OF RECORD: 1977 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3659. 53. 278. 576. 1840. 3880. 9428. 26800. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.3014E+01 + 1.3139E+00 LN(FLOW) - 8.1050E-02 SIN(DECTIME) - 2.1857E-01 COS(DECTIME) - 2.7745E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.230 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 12.23 ( 20 DF) PROBABILITY LEVEL = 0.908 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.3014E+01 + 1.3139E+00 LN(FLOW) - 8.1050E-02 SIN(DECTIME) - 2.1857E-01 COS(DECTIME) - 2.7745E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.230 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 5.3199E+01 + 1.3043E+00 LN(FLOW) - 1.1110E-01 SIN(DECTIME) - 1.9959E-01 COS(DECTIME) - 2.7798E-02 DECTIME 1 STATION: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 3.70 6.00 5.20 2.30 1.40 STD DEV LOAD (TON/DAY) 0.28 0.51 0.51 0.22 0.12 PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 0. 0. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 3. 10. 17. 41. 102. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 3.80 6.10 5.20 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. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 3. 10. 17. 41. 103. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 3.70 5.80 5.10 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. 1. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 1. 3. 10. 17. 39. 97. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 3.7 1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Soluble Reactive Phosphorus (measured as Dissolved Orthophosphate) LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 82 NUMBER OF UNCENSORED OBS.: 76 CALIBRATION DATA PERIOD OF RECORD: 1981 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 4195. 53. 253. 505. 2190. 4268. 14650. 26800. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 7.0857E+00 + 2.2954E+00 LN(FLOW) - 6.1509E-02 LN(FLOW)**2 ESTIMATED RESIDUAL VARIANCE = 0.485 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 31.11 ( 13 DF) PROBABILITY LEVEL = 0.003 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 6.5038E+00 + 2.1581E+00 LN(FLOW) - 5.3483E-02 LN(FLOW)**2 ESTIMATED RESIDUAL VARIANCE = 0.459 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 7.9658E+00 + 2.6081E+00 LN(FLOW) - 8.4920E-02 LN(FLOW)**2 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: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.20 2.00 1.50 0.77 0.60 STD DEV LOAD (TON/DAY) 0.16 0.27 0.21 0.09 0.06 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. 0. 1. 4. 6. 11. 21. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.20 2.10 1.50 0.78 0.60 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. 0. 1. 4. 6. 12. 23. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.20 1.90 1.40 0.75 0.59 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. 0. 1. 3. 5. 9. 16. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- 1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Total Suspended Sediment LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 150 NUMBER OF UNCENSORED OBS.: 150 CALIBRATION DATA PERIOD OF RECORD: 1976 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 5920. 66. 374. 732. 2745. 7998. 16840. 42400. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 8.0997E-02 + 1.9471E+00 LN(FLOW) - 3.3467E-02 SIN(DECTIME) - 7.4722E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 1.106 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 48.93 ( 27 DF) PROBABILITY LEVEL = 0.006 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 8.0997E-02 + 1.9471E+00 LN(FLOW) - 3.3467E-02 SIN(DECTIME) - 7.4722E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 1.106 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 5.6067E-01 + 2.0030E+00 LN(FLOW) - 5.3228E-02 SIN(DECTIME) - 5.9138E-01 COS(DECTIME) WARNING: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. WARNING: MAXIMUM PREDICTED CONCENTRATION EXCEEDS 100000 UG/L 1 STATION: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 21000. 31000. 43000. 7300. 2900. STD DEV LOAD (TON/DAY) 3300. 4800. 8000. 1600. 570. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 92. 277. 813. 2064. 3164. 6282. 15816. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 131. 1069. 7433. 45358. 101349. 364842. 1953685. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 20000. 29000. 40000. 6900. 2700. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 86. 257. 751. 1908. 2932. 5838. 14830. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 122. 988. 6872. 42177. 94039. 339296. 1831852. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 21000. 31000. 41000. 8000. 3400. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 85. 260. 753. 1959. 2971. 6072. 15611. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 123. 1004. 7027. 43436. 100922. 358827. 1928282. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 18000. 1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Dissolved Chloride LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 115 NUMBER OF UNCENSORED OBS.: 115 CALIBRATION DATA PERIOD OF RECORD: 1977 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3659. 53. 278. 576. 1840. 3880. 9428. 26800. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 4.9374E+00 + 1.0913E+00 LN(FLOW) - 1.7816E-02 LN(FLOW)**2 + 1.0678E-02 SIN(DECTIME) + 1.0776E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.059 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 18.22 ( 20 DF) PROBABILITY LEVEL = 0.573 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 4.9374E+00 + 1.0913E+00 LN(FLOW) - 1.7816E-02 LN(FLOW)**2 + 1.0678E-02 SIN(DECTIME) + 1.0776E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.059 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 4.9256E+00 + 1.0818E+00 LN(FLOW) - 1.6273E-02 LN(FLOW)**2 + 7.3310E-02 SIN(DECTIME) + 1.3960E-01 COS(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: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 130. 190. 130. 95. 90. STD DEV LOAD (TON/DAY) 4. 8. 6. 4. 4. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 8. 17. 20. 24. 27. 29. 31. 33. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 33. 79. 163. 316. 429. 686. 1003. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 130. 190. 130. 95. 91. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 8. 17. 20. 24. 27. 29. 32. 33. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 34. 79. 164. 317. 430. 690. 1012. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 130. 210. 130. 92. 95. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 8. 17. 20. 23. 27. 29. 32. 34. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 33. 79. 167. 329. 450. 731. 1093. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 120. 1 STATION NAME: Skunk River at Augusta, IA STATION NUMBER: 05474000 DRAINAGE AREA: 4303.0 SQUARE MILES CONSTITUENT: Dissolved Silica (The values represented here are for SiO2. Values for loads and concentrations have been converted to represent elemental Si. Si = 0.46744 * SiO2 ) LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 115 NUMBER OF UNCENSORED OBS.: 114 CALIBRATION DATA PERIOD OF RECORD: 1977 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3659. 53. 278. 576. 1840. 3880. 9428. 26800. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3182. 22. 194. 523. 1450. 3560. 8510. 45800. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 7.5842E+00 + 3.8267E+00 LN(FLOW) - 1.6810E-01 LN(FLOW)**2 - 2.9840E-01 SIN(DECTIME) + 2.3878E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.633 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 57.11 ( 20 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 7.5874E+00 + 3.8292E+00 LN(FLOW) - 1.6834E-01 LN(FLOW)**2 - 2.9580E-01 SIN(DECTIME) + 2.3734E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.628 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 7.0731E+00 + 3.8434E+00 LN(FLOW) - 1.7674E-01 LN(FLOW)**2 - 1.5515E-01 SIN(DECTIME) + 3.2777E-02 COS(DECTIME) 1 STATION: Skunk River at Augusta, IA (CONTINUED) STATION NUMBER: 05474000 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 120. 160. 130. 120. 86. STD DEV LOAD (TON/DAY) 14. 22. 20. 19. 12. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 8. 13. 16. 22. 25. 27. 27. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 12. 59. 168. 340. 469. 711. 1051. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 120. 150. 120. 110. 81. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 8. 12. 15. 21. 23. 25. 25. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 12. 55. 159. 322. 445. 679. 1024. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 100. 140. 120. 84. 63. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 8. 12. 14. 17. 18. 18. 19. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 13. 56. 148. 288. 366. 486. 600. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 96.