Sediment in the Trinity River Basin

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Virginia SmithCE397 Spring 2009Sediment in the Trinity River Basin1Virginia Smith CE 397OutlineThe Trinity River Basin Sediment DataTrends of the Main ChannelTrends of the CatchmentsConclusions2Virginia Smith CE 397The Trinity River BasinLarge population and growingLots of agriculture80-90% of the basins water supply is from surface water28 water supply reservoirsThe first was in 1911The master planning has 13 remaining reservoirs to built

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Sediment Data in the Basin

4Virginia Smith CE 397Tested at gage 8052700 using Wilcoxon Signed Rank Test through SAS. Its called the Univariate procedure.4Classifying the Gages

5Virginia Smith CE 3974 mainstream, 8 smaller catchments5Mainstream Sediment Gages

6Virginia Smith CE 397Sediment Rating Curves

7Virginia Smith CE 397Dam Influence

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Dam Influence

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9Catchment Sediment Gages

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12Virginia Smith CE 397Delineating Catchments

13Virginia Smith CE 397Natural Regions

14Virginia Smith CE 397Land Cover

15Virginia Smith CE 397Data Attached to Counties

16Virginia Smith CE 397RegressionVariables CollectedHill slopeStorm DepthVegetation DensityPrecipitationPrecipitation IntensityUrban LandAgricultural LandForested LandVariance Inflation Factors17Virginia Smith CE 397CorrelationPrecipitation / Precipitation Intensity / Vegetation Cover DensityHill slope/Erosion RateAgriculture and Forest Land18Virginia Smith CE 397HillslopeAvg Flood DepthErosions Vegetation Precipitation Precip Intensity UrbanAgricultureForestHillslope1Average Flood Depth0.0496180271Erosions (Tons/year)-0.945676986-0.1802319231Vegetation Cover Density0.0806619810.437504042-0.248314311Precipitation (mm/month)0.2945485910.535482799-0.4052056220.9355888421Precipitation Intensity (mm/month)0.2114154130.614652211-0.3129900390.9268534570.9879107611Urban-0.674306514-0.629634540.787740771-0.123992128-0.300847371-0.2728271881Agriculture-0.267466777-0.5151510670.246934188-0.636449602-0.75880502-0.7901643590.2411002671Forest0.1218453420.454508258-0.1554172630.8584824470.8376302660.87813502-0.033591021-0.7723902921RegressionSASConc. = Hill slope*(5.16) t=5.16 R2=0.792p-value = 0.0013 F = 26.65Excel matched the results of SAS19Virginia Smith CE 397

ConclusionsVirginia Smith CE 39720Sediment Rating Curves: a greater slope means a higher concentrationDams have influenced the transport of sediment in the main channelHill slope is the main influence of sediment in the Trinity River BasinQuestionsVirginia Smith CE 39721

Mainstream Flow Duration Curves

22Virginia Smith CE 397SAS Regression DataVirginia Smith CE 39723

Excel Regression DataVirginia Smith CE 39724SUMMARY OUTPUTRegression StatisticsMultiple R0.889925R Square0.791967Adjusted R Square0.64911Standard Error0.725048Observations8ANOVAdfSSMSFSignificance FRegression114.0089914.0089926.64850.00209Residual73.6798660.525695Total817.68885CoefficientsStandard Errort StatP-valueLower 95%Upper 95%Lower 95.0%Upper 95.0%Intercept0#N/A#N/A#N/A#N/A#N/A#N/A#N/AHillslope0.0102860.0019935.1622190.0013060.0055750.0149980.0055750.014998Storm DepthDataVirginia Smith CE 39725Storm DepthRainfall depth during a stormL moment statisticsBased on hourly rainfall during the storm durationDataData by countyData in inches

CorrelationVirginia Smith CE 39726Spearmans RhoHillslopeAvg Flood DepthErosions Vegetation Precipitation Precip Intensity UrbanAgricultureForestHillslope1Average Flood Depth-0.309521Erosions (Tons/year)-0.42860.333331Vegetation Cover Density-0.03615-0.09639-0.289181Precipitation (mm/month)0.469910.14459-0.405970.634151Precipitation Intensity (mm/month)0.3560.31917-0.50330.484560.906991Urban-0.571430.428570.73810.12049-0.09639-0.257791Agriculture-0.21429-0.619050.07143-0.27713-0.6627-0.61379-0.33331Forest-0.285710.571430.285710.481960.481960.392820.7619-0.642861Kendall's TauHillslopeAvg Flood DepthErosions Vegetation Precipitation Precip Intensity UrbanAgricultureForestHillslope1Average Flood Depth-0.214291Erosions (Tons/year)-0.571430.214291Vegetation Cover Density-0.07412-0.14825-0.148251Precipitation (mm/month)0.370620.14825-0.29650.538461Precipitation Intensity (mm/month)0.231460.30861-0.385760.360290.840671Urban-0.50.428570.642860.07412-0.07412-0.15431Agriculture-0.146286-0.357140-0.22237-0.51887-0.46291-0.214291Forest-0.214290.28570.357140.370620.370620.308610.57143-0.642861NCRS Dams

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