Hydrologic Study Hydrologic Study of the Sandies & Elm of the Sandies & Elm Watershed Watershed Jessica L. Watts Jessica L. Watts
Feb 12, 2016
Hydrologic StudyHydrologic Studyof the Sandies & Elm of the Sandies & Elm
WatershedWatershed
Jessica L. WattsJessica L. Watts
Research Project BackgroundResearch Project Background
TCEQ TMDL Study– Bacteria– Low Dissolved Oxygen
Elm River
Sandies River
Semester Project OverviewSemester Project Overview
Tasks:Tasks:
Objective:Objective:To create an HSPF data model that To create an HSPF data model that simulates the gauging station flow for simulates the gauging station flow for the years 2000 through 2004.the years 2000 through 2004.
Arc Hydro Watershed DelineationArc Hydro Watershed DelineationArc Hydro To HSPFArc Hydro To HSPFHSPF Forcing DataHSPF Forcing Data
– Interpolation ComparisonInterpolation ComparisonHSPF Output CalibrationHSPF Output Calibration
Arc HydroArc HydroWatershed DelineationWatershed Delineation
Arc Hydro Input RequirementsArc Hydro Input RequirementsDigital Elevation ModelDigital Elevation Model– Seamless ( http://seamless.usgs.gov/ )Seamless ( http://seamless.usgs.gov/ )
United StatesUnited States– 1/3” National Elevation Dataset1/3” National Elevation Dataset
NHD FlowlinesNHD Flowlines– USGS – National Hydrography Dataset USGS – National Hydrography Dataset
( http://nhd.usgs.gov/data.html )( http://nhd.usgs.gov/data.html )High ResolutionHigh Resolution
Arc Hydro Subbasin DelineationArc Hydro Subbasin Delineation
Arc HydroArc HydroTerrain PreprocessingTerrain PreprocessingWatershed ProcessingWatershed Processing– 35 Subbasins35 Subbasins
(limited by HSPF)(limited by HSPF)
Arc Hydro to HSPFArc Hydro to HSPF
Arc Hydro to HSPFArc Hydro to HSPF
Tools and Models have been built to Tools and Models have been built to convert information from Arc Hydro into convert information from Arc Hydro into the HSPF format.the HSPF format.
Arc Hydro To HSPFModels and Tools
Created by Nate Johnson
Subbasin DelineationSubbasin DelineationFrom Arc HydroFrom Arc Hydro– SubwatershedSubwatershed
– With unique HydroID for each areaWith unique HydroID for each area
Drainage LinesDrainage LinesFrom Arc HydroFrom Arc Hydro– Drainage LinesDrainage Lines
– With DrainID of DrainageLine = HydroID of SubbasinWith DrainID of DrainageLine = HydroID of Subbasin
Land Use ShapefileLand Use Shapefile
1992 Land Use1992 Land Use– Downloaded from Downloaded from
SeamlessSeamless– Used ArcGIS ToolsUsed ArcGIS Tools
To Convert To Convert fromfromRaster to a PolygonRaster to a Polygon
To Clip Polygon into To Clip Polygon into shape of Watershedshape of Watershed
Land Use TablesLand Use Tables
Defines how each Defines how each type of land use is type of land use is treated in HSPFtreated in HSPF
HSPFHSPF
Forcing DataForcing Data
Precipitation DataPrecipitation Data
NCDC Daily Precipitation DataNCDC Daily Precipitation Data– Years 2000 through 2004Years 2000 through 2004
Evaporation DataEvaporation Data
NCDC Daily Evaporation DataNCDC Daily Evaporation Data– Years 2000 through 2004Years 2000 through 2004
Canyon Dam
SeaWorld SAT
Beeville 5 NE
Choke Canyon DAM
Coleto Creek Res.
Interpolation ComparisonInterpolation Comparison
NEXRAD, August 27, 2001NEXRAD, August 27, 2001
Data Interpolation ChoicesData Interpolation ChoicesNEXRADNEXRAD KrigingKriging
Data Interpolation ChoicesData Interpolation ChoicesNEXRADNEXRAD IDWIDW
When averaged over catchments there is a 61% average difference.
Data Interpolation ChoicesData Interpolation ChoicesNEXRADNEXRAD Spline - RegularSpline - Regular
Negative Negative Rain !!Rain !!When averaged over catchments there is a 35% average
difference.
HSPF Forcing DataHSPF Forcing Data
HSPFWDM File
NCDCMonthly
Data
Arc GISZonal
Statistics
HSPFHSPFOutput & CalibrationOutput & Calibration
HSPF OutputHSPF Output
HSPF OutputHSPF Output
Future Work• Calibration• Calibration• Calibration
Thanks…Thanks…
Nate JohnsonNate JohnsonJon GoodallJon Goodall
Gil StrassbergGil StrassbergCarrie GibsonCarrie Gibson
AndAnd
Dr. David MaidmentDr. David Maidment
Questions ?Questions ?