Urban Storm-Water Urban Storm-Water Management Plan Utilizing Management Plan Utilizing

Arc View and HEC-HMSArc View and HEC-HMS

College Station, TexasCollege Station, Texas

Kara CorcoranCVEN 689

History of GIS and Water History of GIS and Water ResourcesResources

Early development Early development of spatial data of spatial data suited for the water suited for the water resources field.resources field.

Most of the work Most of the work has been focused has been focused on Natural Systems on Natural Systems Hydrology.Hydrology.

Why Use GIS for Storm-Why Use GIS for Storm-Water Management?Water Management?

Long-term Long-term planning tool that planning tool that can be easily can be easily updated as updated as development development occurs.occurs.

HEC-HMS SoftwareHEC-HMS Software Hydrologic Modeling Hydrologic Modeling

SystemSystem Developed by the Developed by the

Army Corps of Army Corps of Engineers, Engineers, Hydrologic Hydrologic Engineering CenterEngineering Center

Designed to simulate Designed to simulate the precipitation the precipitation runoff processes of runoff processes of dendritic watershed dendritic watershed systems.systems.

DataData

City of College Station, Land Use City of College Station, Land Use DataData

STATSGO Soil DataSTATSGO Soil Data USGS 30 Meter DEMUSGS 30 Meter DEM City of College Station, Creek Shape City of College Station, Creek Shape

filefile

ProcedureProcedure

Develop a SCS curve number based Develop a SCS curve number based on the STATSGO soils data and the on the STATSGO soils data and the City of College Station Land Use City of College Station Land Use Data.Data.

Delineate sub-watersheds located in Delineate sub-watersheds located in the City of College Station. Using the City of College Station. Using CRWR-PrePro.CRWR-PrePro.

Use HEC-HMS to develop hydrologic Use HEC-HMS to develop hydrologic model of the City of College Station.model of the City of College Station.

Development of Curve Development of Curve NumbersNumbers

Project all datasets into uniform Project all datasets into uniform projectionprojection

State Plane 1983, Texas CentralState Plane 1983, Texas Central

Develop a Land Use Code according to Develop a Land Use Code according to City’s description of Land UseCity’s description of Land Use

Anderson Level IIAnderson Level II

Calculate Curve Number based on Land Calculate Curve Number based on Land Use and Soil as done in CVEN 689 lab.Use and Soil as done in CVEN 689 lab.

Soils and Land Use DataSoils and Land Use Data

Curve Number GridCurve Number Grid

Sub-Watershed Sub-Watershed DelineationDelineation

Project 30 Meter DEM into State Project 30 Meter DEM into State Plane ProjectionPlane Projection

Burn Streams Using Creek Shape Burn Streams Using Creek Shape filefile

Fill SinksFill Sinks

Flow Direction GridFlow Direction Grid

Flow Direction GridFlow Direction Grid

Watershed DelineationWatershed Delineation Create Flow Accumulation GridCreate Flow Accumulation Grid

Create Stream GridCreate Stream Grid

Link Stream SegmentsLink Stream Segments

Determine Stream Outlets from LinksDetermine Stream Outlets from Links

Delineate WatershedsDelineate Watersheds

Outlet GridOutlet Grid

Watershed GridWatershed Grid

HEC-HMS ModelHEC-HMS Model

Vectorize Streams Vectorize Streams and Watershedsand Watersheds

Calculate Stream Calculate Stream and Watershed and Watershed Parameters using Parameters using CRWR-PreProCRWR-PrePro

HEC-HMS ModelHEC-HMS Model

Isolate Streams Isolate Streams and Watersheds and Watersheds common to College common to College Station City LimitsStation City Limits

HEC-HMSHEC-HMS

Write a Basin File Write a Basin File for HEC-HMS for HEC-HMS using CRWR-using CRWR-PreProPrePro

Import Basin File Import Basin File into HEC-HMSinto HEC-HMS

ProgressProgress

Create Precipitation ModelCreate Precipitation Model

Create Control SpecificationsCreate Control Specifications

Compare results with a HEC-HMS Compare results with a HEC-HMS model of College Station without the model of College Station without the use of GIS.use of GIS.

QuestionsQuestions