1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 SQUARE MILES CONSTITUENT: Total Nitrogen LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 114 NUMBER OF UNCENSORED OBS.: 114 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 11408. 900. 2480. 4210. 8020. 13650. 25050. 78100. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 9.9450E+00 + 3.7568E+00 LN(FLOW) - 1.3813E-01 LN(FLOW)**2 + 5.5025E-02 SIN(DECTIME) + 2.0205E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.122 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 31.96 ( 19 DF) PROBABILITY LEVEL = 0.032 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 9.9450E+00 + 3.7568E+00 LN(FLOW) - 1.3813E-01 LN(FLOW)**2 + 5.5025E-02 SIN(DECTIME) + 2.0205E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.122 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 1.0055E+01 + 3.8553E+00 LN(FLOW) - 1.4710E-01 LN(FLOW)**2 + 1.2136E-01 SIN(DECTIME) + 1.3897E-01 COS(DECTIME) 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 200. 330. 220. 140. 130. STD DEV LOAD (TON/DAY) 9. 20. 15. 8. 8. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 5. 7. 8. 9. 10. 10. 11. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 48. 130. 270. 522. 693. 1059. 1440. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 200. 330. 220. 140. 130. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 5. 7. 8. 9. 10. 10. 11. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 48. 129. 269. 519. 689. 1060. 1447. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 200. 330. 210. 120. 120. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 6. 7. 8. 9. 9. 10. 10. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 50. 129. 265. 503. 658. 962. 1303. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 200. 1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 SQUARE MILES CONSTITUENT: Total Nitrate + Nitrite LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 117 NUMBER OF UNCENSORED OBS.: 113 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 11977. 900. 2498. 4400. 8060. 13700. 25200. 85300. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 2.9968E+01 + 7.6736E+00 LN(FLOW) - 3.3028E-01 LN(FLOW)**2 + 8.5765E-02 SIN(DECTIME) + 5.8405E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.461 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 46.04 ( 20 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 2.8911E+01 + 7.4581E+00 LN(FLOW) - 3.1940E-01 LN(FLOW)**2 + 8.9437E-02 SIN(DECTIME) + 5.6521E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.449 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 2.8970E+01 + 7.5658E+00 LN(FLOW) - 3.2958E-01 LN(FLOW)**2 + 6.4528E-02 SIN(DECTIME) + 3.7091E-01 COS(DECTIME) WARNING: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 190. 330. 150. 130. 150. STD DEV LOAD (TON/DAY) 17. 39. 19. 15. 17. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 5. 8. 11. 12. 15. 17. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 24. 99. 249. 527. 720. 1102. 1504. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 180. 320. 150. 120. 140. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 5. 7. 10. 12. 14. 16. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 24. 96. 241. 509. 708. 1063. 1461. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 170. 290. 160. 120. 120. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 5. 7. 9. 10. 11. 12. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 24. 98. 239. 483. 638. 864. 1123. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 150. 1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 SQUARE MILES CONSTITUENT: Dissolved Ammonia LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 96 NUMBER OF UNCENSORED OBS.: 82 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 11771. 900. 2228. 4030. 7720. 14775. 25250. 85300. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.7038E+02 - 2.6502E+00 LN(FLOW) + 2.1609E-01 LN(FLOW)**2 + 8.1472E-01 SIN(DECTIME) + 9.7575E-01 COS(DECTIME) - 7.8654E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 1.247 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 29.22 ( 16 DF) PROBABILITY LEVEL = 0.023 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.5865E+02 - 2.4086E+00 LN(FLOW) + 2.0257E-01 LN(FLOW)**2 + 7.3508E-01 SIN(DECTIME) + 9.7090E-01 COS(DECTIME) - 7.3249E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 1.148 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 1.6106E+02 - 2.6289E+00 LN(FLOW) + 2.1445E-01 LN(FLOW)**2 + 7.6942E-01 SIN(DECTIME) + 9.8859E-01 COS(DECTIME) - 7.3887E-02 DECTIME WARNING: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 6. 13. 2. 2. 5. STD DEV LOAD (TON/DAY) 1. 4. 1. 0. 1. 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. 2. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 5. 12. 21. 59. 274. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 6. 13. 2. 2. 5. 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. 2. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 5. 12. 21. 57. 282. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 6. 13. 2. 2. 6. 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. 2. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 5. 12. 22. 60. 300. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 4.0 - 4.1 1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 SQUARE MILES CONSTITUENT: Total Phosphorus LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 116 NUMBER OF UNCENSORED OBS.: 116 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 11344. 900. 2492. 4350. 7970. 13600. 25030. 78100. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.6501E+01 - 1.0549E+00 LN(FLOW) + 1.1713E-01 LN(FLOW)**2 - 2.3774E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.255 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 25.81 ( 20 DF) PROBABILITY LEVEL = 0.172 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 5.6501E+01 - 1.0549E+00 LN(FLOW) + 1.1713E-01 LN(FLOW)**2 - 2.3774E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.255 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 5.0619E+01 - 9.7618E-01 LN(FLOW) + 1.1393E-01 LN(FLOW)**2 - 2.1033E-02 DECTIME 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 9. 13. 11. 5. 4. STD DEV LOAD (TON/DAY) 1. 1. 1. 0. 0. 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 1. 3. 5. 10. 20. 29. 61. 158. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 9. 13. 11. 5. 4. 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 1. 3. 5. 9. 20. 28. 62. 164. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 9. 13. 12. 5. 4. 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 1. 3. 5. 10. 20. 29. 64. 174. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 8.5 1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 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.: 75 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 12445. 900. 1605. 3903. 7830. 17800. 26090. 85300. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 2.0068E+01 - 3.9821E+00 LN(FLOW) + 2.9233E-01 LN(FLOW)**2 + 1.7905E-01 SIN(DECTIME) + 5.1780E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.808 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 34.20 ( 13 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.9328E+01 - 3.7917E+00 LN(FLOW) + 2.8078E-01 LN(FLOW)**2 + 1.5139E-01 SIN(DECTIME) + 5.0565E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.750 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 1.9422E+01 - 3.6609E+00 LN(FLOW) + 2.6700E-01 LN(FLOW)**2 + 1.1066E-01 SIN(DECTIME) + 5.1311E-01 COS(DECTIME) WARNING: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 4.40 7.60 5.20 2.10 2.70 STD DEV LOAD (TON/DAY) 0.78 1.60 1.50 0.39 0.49 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. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 3. 10. 17. 52. 190. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 4.30 7.20 5.10 2.20 2.60 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. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 3. 9. 16. 49. 194. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 3.70 6.00 4.10 2.10 2.60 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. 1. 1. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 1. 2. 3. 8. 13. 37. 131. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 3.2 1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 SQUARE MILES CONSTITUENT: Total Suspended Sediment LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 129 NUMBER OF UNCENSORED OBS.: 129 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 14201. 937. 2610. 4750. 9440. 19500. 27400. 106000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 7.6164E+00 + 3.6238E+00 LN(FLOW) - 1.1468E-01 LN(FLOW)**2 + 6.0395E-02 SIN(DECTIME) - 8.3512E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.826 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 21.46 ( 22 DF) PROBABILITY LEVEL = 0.492 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 7.6164E+00 + 3.6238E+00 LN(FLOW) - 1.1468E-01 LN(FLOW)**2 + 6.0395E-02 SIN(DECTIME) - 8.3512E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.826 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 7.5808E+00 + 3.6951E+00 LN(FLOW) - 1.2355E-01 LN(FLOW)**2 + 3.8070E-02 SIN(DECTIME) - 6.6563E-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. WARNING: MAXIMUM PREDICTED CONCENTRATION EXCEEDS 100000 UG/L 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 11000. 17000. 23000. 3900. 1700. STD DEV LOAD (TON/DAY) 1400. 2400. 3600. 640. 270. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 7. 89. 171. 380. 625. 729. 897. 994. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 9. 818. 3044. 11738. 32069. 49373. 107994. 271988. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 12000. 18000. 24000. 4100. 1800. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 9. 93. 178. 396. 649. 756. 941. 1066. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 11. 854. 3174. 12223. 33299. 51382. 113338. 303575. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 11000. 16000. 19000. 4300. 2100. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 13. 114. 196. 374. 561. 631. 726. 768. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 16. 1039. 3550. 11910. 29041. 43532. 88170. 206113. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 12000. 1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 SQUARE MILES CONSTITUENT: Dissolved Chloride LOAD ESTIMATES FOR 19760101 TO 19951231 TOTAL NUMBER OF OBS.: 116 NUMBER OF UNCENSORED OBS.: 116 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 11344. 900. 2492. 4350. 7970. 13600. 25030. 78100. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.2588E+01 - 4.5673E-01 LN(FLOW) + 6.5718E-02 LN(FLOW)**2 + 8.7592E-03 SIN(DECTIME) + 8.7640E-02 COS(DECTIME) + 1.2700E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.074 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 35.12 ( 20 DF) PROBABILITY LEVEL = 0.019 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.2588E+01 - 4.5673E-01 LN(FLOW) + 6.5718E-02 LN(FLOW)**2 + 8.7592E-03 SIN(DECTIME) + 8.7640E-02 COS(DECTIME) + 1.2700E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.074 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 1.0913E+01 - 1.8746E-01 LN(FLOW) + 4.7955E-02 LN(FLOW)**2 + 5.2194E-02 SIN(DECTIME) + 4.8786E-02 COS(DECTIME) + 1.1347E-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. WARNING: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 600. 820. 680. 470. 430. STD DEV LOAD (TON/DAY) 18. 36. 34. 20. 19. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 16. 22. 27. 34. 46. 58. 78. 90. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 109. 295. 459. 721. 1186. 1559. 2627. 5310. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 610. 830. 690. 470. 430. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 16. 22. 27. 34. 47. 59. 78. 91. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 111. 295. 460. 723. 1190. 1565. 2646. 5396. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 600. 830. 670. 450. 430. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 15. 22. 27. 35. 49. 59. 79. 90. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 112. 305. 466. 721. 1157. 1489. 2367. 4382. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 610. 1 STATION NAME: Iowa River at Wapello, IA STATION NUMBER: 05465500 DRAINAGE AREA: 12499.0 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.: 114 NUMBER OF UNCENSORED OBS.: 112 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 11478. 900. 2480. 4450. 8110. 13650. 25050. 78100. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 9802. 460. 1420. 3250. 6400. 12100. 22300. 106000. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 8.3106E+01 + 4.6579E+00 LN(FLOW) - 1.5537E-01 LN(FLOW)**2 - 1.7500E-01 SIN(DECTIME) + 5.0608E-01 COS(DECTIME) - 5.0275E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 1.379 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 65.44 ( 19 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 8.2889E+01 + 4.5355E+00 LN(FLOW) - 1.4895E-01 LN(FLOW)**2 - 1.7626E-01 SIN(DECTIME) + 5.1444E-01 COS(DECTIME) - 4.9873E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 1.357 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 8.2750E+01 + 4.4980E+00 LN(FLOW) - 1.5362E-01 LN(FLOW)**2 - 1.7358E-01 SIN(DECTIME) + 5.0256E-01 COS(DECTIME) - 4.9383E-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. WARNING: MAXIMUM PREDICTED CONCENTRATION EXCEEDS 100000 UG/L 1 STATION: Iowa River at Wapello, IA (CONTINUED) STATION NUMBER: 05465500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 470. 750. 470. 360. 300. STD DEV LOAD (TON/DAY) 87. 170. 120. 78. 64. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 5. 11. 17. 25. 30. 41. 59. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 49. 196. 562. 1279. 1947. 3544. 7690. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1100. 1800. 1100. 840. 710. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 12. 25. 40. 57. 70. 97. 143. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 117. 461. 1300. 2997. 4601. 9063. 20374. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 870. 1300. 860. 690. 590. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 12. 22. 33. 47. 56. 73. 104. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 112. 412. 1074. 2311. 3445. 6249. 13535. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 270.