1. Water Quality Assessment of Osage Creek & West Fork, White and Kings Rivers 2008 & ½ 2009 Marc Nelson PhD, PE Nelson Engineering

2. Funding provided by: Arkansas Natural Resources Commission, EPA 319 Grant Program To : Northwest Arkansas Conservation Authority - Osage City Of Fayetteville - West Fork Beaver Water District - White Kings River Watershed Partnership - Kings

3. Summarize Water Quality Assessment Four watersheds NWA 2008 and first half of 2009 results Phosphorus Trends Watershed comparisons

4. Osage Creek West Fork of White River White River @ 45 Bridge Kings River Northwest Arkansas Water Quality Monitoring Sites

6. Water Quality Sampling Grab samples every two weeks Auto-sampler samples all storm events > trigger level Flow-weighted composite samples (except White) SO 4, Cl -, NH 4, NO 3/ NO 2, T-N, T-P, sPO 4, and TSS Concentrations assigned to all times USGS discharge for all times Loads calculated by multiplying and summing for the year Sondes reading turbidity, conductivity and temp (except Kings River)

9. Kings River near Berryville 2008 Loads and Mean Concentrations ParameterTotal Discharge Total Load (m 3 /yr)(kg/yr) 796,964,238 SO 4 3,680,000 Cl - 2,265,835 NO 3 /NO 2 -N 524,321 TP 217,473 NH 4 -N 49,313 TN 1,048,175 sPO 4 -P 28,059 TSS 166,344,864

10. Kings River near Berryville 2008 Loads and Mean Concentrations ParameterTotal Discharge Total LoadAverage Discharge Mean (m 3 /yr)(kg/yr)(m 3 /s)Concentrations (mg/l) 796,964,238 25.3 SO 4 3,680,000 4.62 Cl - 2,265,835 2.84 NO 3 /NO 2 -N 524,321 0.66 TP 217,473 0.27 NH 4 -N 49,313 0.06 TN 1,048,175 1.32 sPO 4 -P 28,059 0.04 TSS 166,344,864 208.72

11. Kings River near Berryville 2008 Storm and Base-flow Loads and Mean Concentrations Parameter Storm LoadsBase Loads Storm Concentrations (mg/l) Base Concentrations (mg/l) (kg) Discharge (m 3 )510,695,939286,268,299 SO 4 1,976,6921,703,3083.875.95 Cl - 1,083,4261,182,4082.124.13 NO 3 /NO 2 -N318,395205,9250.620.72 TP203,84113,6320.400.05 NH 4 -N44,0405,2730.090.02 TN780,366267,8091.530.94 sPO 4 -P18,5429,5160.040.03 TSS165,148,9111,195,953323.384.18

12. Kings River near Berryville First Half of 2009 Storm and Base-flow Loads and Mean Concentrations Parameter Storm LoadsBase Loads Storm Concentrations (mg/l) Base Concentrations (mg/l) (kg) Discharge (m 3 )283,881,933216,878,594 SO 4 1,220,1221,062,5754.304.90 Cl - 689,341674,9902.433.11 NO 3 /NO 2 -N160,241133,5270.560.62 TP39,3558,9360.140.04 NH 4 -N5,1033,4420.02 TN418,119175,0551.470.81 sPO 4 -P5,7165,8500.020.03 TSS31,103,4911,603,502109.567.39

13. Kings River P trends

16. Parameter Storm LoadsBase Loads Storm Concentrations (mg/l) Base Concentrations (mg/l) (kg) Discharge (M3)352,003,22775,214,118 SO 4 2,412,067883,7146.8511.75 Cl - 783,554373,6612.234.97 NO3/NO2- N130,16754,9500.370.73 T-P256,0025,6900.730.08 NH4-N53,8752,4690.150.03 T-N403,79374,9071.151.00 sPO 4 -P11,2466260.030.01 TSS168,910,0691,324,206479.8517.61 White River near Goshen 2008 Storm and Base-flow Loads and Mean Concentrations

17. White River near Goshen

19. Storm LoadsBase Loads Storm Concentr ations (mg/l) Base Concentr ations (mg/l) (kg) Discharge (M3)148,229,762119,349,947 SO 4 1,806,8112,485,78412.1920.83 Cl - 1,520,0402,433,80310.2520.39 NO3/NO2 -N460,819507,2353.114.25 T-P65,66516,1080.440.13 NH4-N12,3572,9300.080.02 T-N566,285530,2923.824.44 sPO 4 -P16,70611,3190.110.09 TSS42,376,0562,130,036285.8817.85 Osage Creek near Elm Springs 2008 Storm and Base-flow Loads and Mean Concentrations

20. Osage Creek near Elm Springs

22. West Fork near Baldwin 2008 Storm and Base-flow Loads and Mean Concentrations Parameter Storm LoadsBase Loads Storm Concentrations (mg/l) Base Concentrations (mg/l) (kg) Discharge (M3)199,282,24944,218,901 SO 4 2,528,2361,162,18112.6926.28 Cl - 559,928214,0052.814.84 NO3/NO2- N83,99522,1720.420.50 T-P89,2941,5860.450.036 NH4-N40,3221,0250.200.02 T-N198,83429,5301.000.67 sPO 4 -P5,8513760.030.009 TSS46,775,101573,090234.7212.96

23. West Fork near Elm Springs

24. Watershed comparison

27. Questions?