State Water Resources Research Institute Program

Project ID: 2008DC96B
Title: Gradual Variation Analysis for Groundwater Flow in the District of Columbia (Phase II)
Project Type: Research
Start Date: 3/01/2008
End Date: 2/28/2009
Congressional District: District of Columbia
Focus Categories: Groundwater, Models, Methods
Keywords: Groundwater flow, gradual variation, analysis, computer simulation, real data processing, MODFLOW
Principal Investigator: Chen, Li
Federal Funds: $ 15,000
Non-Federal Matching Funds: $ 38,740
Abstract: In last year's proposal, we have established a connection to use gradually varied functions in groundwater research. We have accomplished three tasks: (1) extracting of real data from databases of DC areas, (2) storing the data into local database, (3) reconstructing the water-head surfaces for time sequences using gradually varied surface fitting. We have also completed the design of the combined gradually varied fitting with finite difference method. We expect to finish the coding and testing before the end of February 2008. We have planed to run the comparison with MODFLOW, and we would like to accomplish it in this proposal.

In this proposal, we plan to complete two major tasks: (1) compare acquired data with MODFLOW processing, (2) Develop a mix method using gradually varied surfaces and the finite element method. Our method established a true 3D simulation model based on gradually varied functions. The testing result is already showing great promise. These functions do not rely on a rectangular Cartesian coordinate system. A gradually varied function can be defined in a general graph or network. Gradually varied functions are suitable for arbitrarily shaped aquifers.

Progress/Completion Report, PDF

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