1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 SQUARE MILES CONSTITUENT: Total Nitrogen LOAD ESTIMATES FOR 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 88 NUMBER OF UNCENSORED OBS.: 88 CALIBRATION DATA PERIOD OF RECORD: 1975 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 1599. 40. 147. 257. 657. 2098. 3254. 12000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. WARNING: THE RATIO OF LARGEST PREDICTION DATA SET STEAMFLOW AND LARGEST CALIBRATION DATA SET STREAMFLOW EXCEEDS 2.0 MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.0685E+00 + 1.3670E+00 LN(FLOW) + 8.9213E-02 SIN(DECTIME) + 1.3876E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.260 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 23.04 ( 14 DF) PROBABILITY LEVEL = 0.060 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.0685E+00 + 1.3670E+00 LN(FLOW) + 8.9213E-02 SIN(DECTIME) + 1.3876E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.260 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 9.2952E-01 + 1.4013E+00 LN(FLOW) - 7.6480E-03 SIN(DECTIME) + 1.0935E-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: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 80. 150. 100. 30. 31. STD DEV LOAD (TON/DAY) 9. 18. 13. 4. 4. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 5. 8. 11. 14. 17. 21. 29. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 5. 20. 68. 203. 381. 816. 4487. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 80. 150. 100. 30. 32. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 5. 8. 11. 14. 17. 21. 29. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 5. 20. 68. 204. 384. 822. 4566. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 84. 150. 120. 34. 31. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 5. 8. 11. 15. 18. 22. 36. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 5. 20. 71. 208. 395. 888. 5529. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 58. 1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 SQUARE MILES CONSTITUENT: Total Nitrate + Nitrite LOAD ESTIMATES FOR 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 93 NUMBER OF UNCENSORED OBS.: 91 CALIBRATION DATA PERIOD OF RECORD: 1975 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 1726. 40. 149. 288. 790. 2260. 3612. 12000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. WARNING: THE RATIO OF LARGEST PREDICTION DATA SET STEAMFLOW AND LARGEST CALIBRATION DATA SET STREAMFLOW EXCEEDS 2.0 MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.1985E+00 + 1.6458E+00 LN(FLOW) - 8.5941E-03 SIN(DECTIME) + 4.6353E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.685 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 38.16 ( 15 DF) PROBABILITY LEVEL = 0.001 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.1564E+00 + 1.6400E+00 LN(FLOW) - 5.6911E-03 SIN(DECTIME) + 4.5553E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.671 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 1.8797E-02 + 1.5081E+00 LN(FLOW) - 1.2796E-02 SIN(DECTIME) + 2.9368E-01 COS(DECTIME) WARNING: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 100. 200. 130. 42. 47. STD DEV LOAD (TON/DAY) 19. 38. 27. 9. 10. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 4. 7. 12. 18. 23. 34. 61. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 18. 74. 243. 500. 1261. 8695. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 96. 180. 120. 39. 43. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 3. 6. 11. 17. 21. 32. 56. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 16. 68. 223. 461. 1163. 8184. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 73. 140. 94. 30. 31. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 1. 4. 6. 9. 13. 16. 21. 34. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 3. 15. 58. 178. 345. 810. 5349. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 52. 1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 SQUARE MILES CONSTITUENT: Dissolved Ammonia LOAD ESTIMATES FOR 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 49 NUMBER OF UNCENSORED OBS.: 47 CALIBRATION DATA PERIOD OF RECORD: 1986 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2350. 114. 220. 448. 1070. 2460. 8600. 12000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. WARNING: THE RATIO OF LARGEST PREDICTION DATA SET STEAMFLOW AND LARGEST CALIBRATION DATA SET STREAMFLOW EXCEEDS 2.0 MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.5768E+00 + 1.0160E+00 LN(FLOW) + 4.5455E-01 SIN(DECTIME) + 5.0848E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.995 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 9.94 ( 6 DF) PROBABILITY LEVEL = 0.127 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 1.5720E+00 + 1.0176E+00 LN(FLOW) + 4.5792E-01 SIN(DECTIME) + 4.7690E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.969 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 2.0710E+00 + 1.0559E+00 LN(FLOW) + 3.0676E-01 SIN(DECTIME) + 3.1394E-01 COS(DECTIME) 1 STATION: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 0.42 0.89 0.31 0.16 0.31 STD DEV LOAD (TON/DAY) 0.09 0.24 0.09 0.04 0.09 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. 0. 1. 2. 3. 9. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 0.48 1.00 0.37 0.18 0.34 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. 1. 2. 4. 10. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 0.49 1.00 0.47 0.20 0.30 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. 1. 2. 4. 11. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 0.55 - 0.56 1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 SQUARE MILES CONSTITUENT: Total Phosphorus LOAD ESTIMATES FOR 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 87 NUMBER OF UNCENSORED OBS.: 87 CALIBRATION DATA PERIOD OF RECORD: 1975 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 1611. 40. 145. 250. 753. 2110. 3308. 12000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. WARNING: THE RATIO OF LARGEST PREDICTION DATA SET STEAMFLOW AND LARGEST CALIBRATION DATA SET STREAMFLOW EXCEEDS 2.0 MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 6.7520E+01 + 1.8038E-01 LN(FLOW) + 6.7390E-02 LN(FLOW)**2 + 9.9234E-02 SIN(DECTIME) - 2.0852E-01 COS(DECTIME) - 3.2834E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.408 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 16.57 ( 14 DF) PROBABILITY LEVEL = 0.280 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 6.7520E+01 + 1.8038E-01 LN(FLOW) + 6.7390E-02 LN(FLOW)**2 + 9.9234E-02 SIN(DECTIME) - 2.0852E-01 COS(DECTIME) - 3.2834E-02 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.408 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 6.3720E+01 + 5.9985E-01 LN(FLOW) + 3.9849E-02 LN(FLOW)**2 + 1.7128E-01 SIN(DECTIME) - 9.9131E-02 COS(DECTIME) - 3.1716E-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: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.90 3.40 2.80 0.63 0.55 STD DEV LOAD (TON/DAY) 0.35 0.67 0.65 0.10 0.08 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. 0. 2. 4. 9. 19. 112. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.00 3.70 3.10 0.68 0.58 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. 9. 21. 145. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 2.10 4.10 2.90 0.72 0.72 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. 10. 22. 109. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 1.6 1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 SQUARE MILES CONSTITUENT: Soluble Reactive Phosphorus (measured as Dissolved Orthophosphate) LOAD ESTIMATES FOR 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 49 NUMBER OF UNCENSORED OBS.: 43 CALIBRATION DATA PERIOD OF RECORD: 1986 TO 1995 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2350. 114. 220. 448. 1070. 2460. 8600. 12000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. WARNING: THE RATIO OF LARGEST PREDICTION DATA SET STEAMFLOW AND LARGEST CALIBRATION DATA SET STREAMFLOW EXCEEDS 2.0 MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 2.9865E+00 - 6.0448E-01 LN(FLOW) + 1.4133E-01 LN(FLOW)**2 + 2.9452E-01 SIN(DECTIME) + 7.1816E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.971 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 16.03 ( 6 DF) PROBABILITY LEVEL = 0.014 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 2.4871E+00 - 4.1681E-01 LN(FLOW) + 1.2619E-01 LN(FLOW)**2 + 2.7598E-01 SIN(DECTIME) + 6.3934E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.887 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 5.1541E+00 - 1.2235E+00 LN(FLOW) + 1.8345E-01 LN(FLOW)**2 + 9.8764E-02 SIN(DECTIME) + 7.1100E-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: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. 1 STATION: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.30 2.90 1.20 0.36 0.69 STD DEV LOAD (TON/DAY) 0.44 1.00 0.59 0.11 0.20 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. 0. 1. 3. 6. 19. 115. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.30 2.90 1.50 0.38 0.67 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. 0. 1. 3. 6. 19. 190. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 1.60 3.10 2.10 0.48 0.72 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. 3. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 0. 0. 1. 3. 6. 22. 418. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 0.80 1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 SQUARE MILES CONSTITUENT: Total Suspended Sediment LOAD ESTIMATES FOR 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 41 NUMBER OF UNCENSORED OBS.: 41 CALIBRATION DATA PERIOD OF RECORD: 1986 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 3098. 114. 223. 421. 959. 2560. 9096. 38300. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.5667E+00 + 1.7260E+00 LN(FLOW) + 1.5321E-02 SIN(DECTIME) - 4.5834E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.518 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 10.06 ( 5 DF) PROBABILITY LEVEL = 0.074 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = + 1.5667E+00 + 1.7260E+00 LN(FLOW) + 1.5321E-02 SIN(DECTIME) - 4.5834E-01 COS(DECTIME) ESTIMATED RESIDUAL VARIANCE = 0.518 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 1.1162E+00 + 1.7799E+00 LN(FLOW) + 9.5078E-02 SIN(DECTIME) - 3.2280E-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: THE MAXIMUM PREDICTED CONCENTRATION EXCEEDS TWICE THE MAXIMUM OBSERVED SAMPLE CONCENTRATION. WARNING: MAXIMUM PREDICTED CONCENTRATION EXCEEDS 100000 UG/L 1 STATION: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 4600. 7700. 9100. 980. 640. STD DEV LOAD (TON/DAY) 1000. 1700. 2300. 240. 150. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 13. 72. 158. 362. 716. 991. 1638. 4802. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 71. 420. 2257. 9992. 21534. 64497. 744723. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 5000. 8200. 9900. 1100. 680. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 14. 76. 168. 385. 762. 1054. 1761. 5350. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 76. 444. 2392. 10652. 22982. 69179. 829731. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 5600. 9800. 10000. 1100. 880. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 15. 77. 175. 401. 823. 1177. 1940. 5953. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 72. 459. 2521. 11685. 25958. 75838. 923159. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 8300. 1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 SQUARE MILES CONSTITUENT: Dissolved Chloride LOAD ESTIMATES FOR 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 87 NUMBER OF UNCENSORED OBS.: 87 CALIBRATION DATA PERIOD OF RECORD: 1975 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 1593. 40. 145. 250. 560. 2110. 3308. 12000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. WARNING: THE RATIO OF LARGEST PREDICTION DATA SET STEAMFLOW AND LARGEST CALIBRATION DATA SET STREAMFLOW EXCEEDS 2.0 MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 9.5253E+00 + 9.1065E-01 LN(FLOW) + 7.5194E-03 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.084 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 14.97 ( 14 DF) PROBABILITY LEVEL = 0.380 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 9.5253E+00 + 9.1065E-01 LN(FLOW) + 7.5194E-03 DECTIME ESTIMATED RESIDUAL VARIANCE = 0.084 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = + 4.6122E-01 + 9.5640E-01 LN(FLOW) + 2.3335E-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: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 120. 190. 150. 67. 59. STD DEV LOAD (TON/DAY) 6. 11. 9. 3. 2. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 16. 21. 23. 25. 27. 27. 28. 29. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 24. 61. 139. 292. 439. 746. 2644. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 120. 190. 150. 67. 59. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 16. 21. 23. 25. 27. 27. 28. 30. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 24. 62. 140. 292. 441. 750. 2662. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 130. 210. 160. 69. 61. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 20. 23. 24. 25. 25. 25. 26. 26. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 23. 62. 146. 315. 483. 854. 3109. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 120. 1 STATION NAME: Raccoon River at Van Meter, IA STATION NUMBER: 05484500 DRAINAGE AREA: 3441.0 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 19750701 TO 19950630 TOTAL NUMBER OF OBS.: 45 NUMBER OF UNCENSORED OBS.: 45 CALIBRATION DATA PERIOD OF RECORD: 1986 TO 1994 CALIBRATION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2208. 114. 212. 399. 959. 2460. 8252. 12000. PREDICTION DATA SET STREAMFLOW SUMMARY STATISTICS MEAN MINIMUM 10TH PCT 25TH PCT MEDIAN 75TH PCT 90TH PCT MAXIMUM 2116. 43. 189. 350. 975. 2390. 5320. 57500. WARNING: THE RATIO OF LARGEST PREDICTION DATA SET STEAMFLOW AND LARGEST CALIBRATION DATA SET STREAMFLOW EXCEEDS 2.0 MAXIMUM LIKELIHOOD ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 2.4972E+00 + 2.6578E+00 LN(FLOW) - 9.5986E-02 LN(FLOW)**2 ESTIMATED RESIDUAL VARIANCE = 0.335 TURNBULL-WEISS LIKELIHOOD RATIO NORMALITY TEST STATISTIC = 19.43 ( 6 DF) PROBABILITY LEVEL = 0.004 LINEAR ATTRIBUTION ESTIMATE OF BEST FIT MODEL --------------------------------------------- LN(LOAD) = - 2.4972E+00 + 2.6578E+00 LN(FLOW) - 9.5986E-02 LN(FLOW)**2 ESTIMATED RESIDUAL VARIANCE = 0.335 LEAST ABSOLUTE DEVIATION ESTIMATE OF BEST FIT MODEL --------------------------------------------------- LN(LOAD) = - 1.2222E+00 + 2.4461E+00 LN(FLOW) - 8.8845E-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: Raccoon River at Van Meter, IA (CONTINUED) STATION NUMBER: 05484500 LOADS ESTIMATED BY RATING CURVE METHOD (MAXIMUM LIKELIHOOD PARAM. EST.) ----------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 120. 200. 150. 58. 50. STD DEV LOAD (TON/DAY) 17. 34. 26. 6. 5. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 11. 17. 21. 23. 23. 23. 23. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 10. 45. 138. 329. 505. 811. 1600. LOADS ESTIMATED BY RATING CURVE METHOD (LINEAR ATTRIBUTION PARAM. EST.) ---------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 110. 200. 150. 55. 47. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 2. 10. 16. 20. 21. 22. 22. 22. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 10. 43. 131. 312. 484. 803. 2012. LOADS ESTIMATED BY RATING CURVE METHOD (LEAST ABSOLUTE DEVIATION PARAM. EST.) ----------------------------------------------------------------------------- ANNUAL SPRING SUMMER FALL WINTER AVERAGE LOAD (TON/DAY) 96. 160. 120. 50. 44. PREDICTED CONCENTRATION SUMMARY STATISTICS (MG/L) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 3. 12. 16. 18. 18. 19. 19. 19. PREDICTED LOAD SUMMARY STATISTICS (TON/DAY) MINIMUM 25TH PCT MEDIAN 75TH PCT 90TH PCT 95TH PCT 99TH PCT MAXIMUM 0. 11. 42. 118. 262. 390. 619. 1420. LOAD ESTIMATED BY BEALE RATIO ESTIMATOR --------------------------------------- AVERAGE ANNUAL LOAD (TON/DAY): 100.