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Modflow Simulation on Savannah River

Modflow Simulation on Savannah River. GIS For Water Resources Term Project (CE 394). Seyoum Asemenaw. ModFlow. Defn:- Modflow is a 3-D finite difference GW flow model that solves the continuity equation (Mod flow 2000). Various mod flow packages:- BCF6 -- Block-Centered Flow Package

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Modflow Simulation on Savannah River

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  1. Modflow Simulation on Savannah River GIS For Water Resources Term Project (CE 394) Seyoum Asemenaw

  2. ModFlow Defn:- Modflow is a 3-D finite difference GW flow model that solves the continuity equation (Mod flow 2000). Various mod flow packages:- • BCF6 -- Block-Centered Flow Package • LPF1 -- Layer-Property Flow Package • RIV6 -- River Package • DRN6 -- Drain Package • WEL6 -- Well Package • GHB6 -- General Head Boundary Package • RCH6 -- Recharge Package • EVT6 -- Evapotranspiration Package • CHD6 -- Time-Variant Specified-Head Package • HFB6 -- Horizontal Flow Barrier Package • SIP5 -- Strongly Implicit Procedure Package

  3. Term Project Goals The major objectives are:- • To build a modflow interface geodatabase schema • To show the relationships between various feature classes • To show a time series analysis using Modpath ModPath:-calculate streamlines and travel times along streamlines within the ModFlow daomain. Data sources: • Savannah River Authority • USGS website • CRWR

  4. Savannah River Site

  5. Building a Modflow Mesh (Fishnet)

  6. Fishnet in Workstation Arc/Info Building Fishnet The fishnet prompts are: - Arc: generate f2 Generate: fishnet Origin Coordinate (x, y):437005,3681499 m Y-Axis coordinate (x,y) : 437005,3682990 m Cell Size (width, Height)91.44,91.44 m Number of Rows, columns: 15,22 Generate: quit Polygon construction Arc: build f2 Generate :quit

  7. Resulting Mesh in ArcMap

  8. Modflow Interface Data Model (Developed by Gil Strassberg)

  9. Modflow Schema in Visio 2000

  10. From Schema to Repository

  11. Applying the Schema to Savannah River Data

  12. ModFlow River Package

  13. ModFlow General Head Boundary

  14. ModFlow Well Package

  15. ModPath Simulation

  16. ModFlow Special thanks to:- • Gil Strassberg • Dr. David Maidment • CRWR crew

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