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Water Supply Reserve Account -Grant Application Form
<br />Form Revised May 2007
<br />Stream-aquifer interaction is a difficult process to address in a river basin-scale model. Simplified,
<br />lumped stream-aquifer response models are generally incorporated into river basin models, but fail
<br />to adequately capture the complex dynamic and spatial characteristics. An innovative methodology
<br />has been developed to represent the basin-scale stream-aquifer interaction modeling based on
<br />detailed regional-scale groundwater modeling2. This methodology trains ANNs to find relationships
<br />between spatially-distributed system state variables that can be measured/estimated at the basin-
<br />scale and the spatially distributed aquifer response to stresses as embodied in the regional-scale
<br />GMS groundwater model. The relationships found with this methodology incorporate management
<br />scenario results of the regional-scale GMS model into the GeoDSS for evaluating management
<br />options over the lower Arkansas basin3. The GMS software package links the MODFLOW4
<br />groundwater flow model and the MT3DMS5 contaminant transport model for solving finite-difference
<br />approximations of the flow and salt transport equations within aspatially-referenced GIS6. The
<br />model has been amended to include analysis of soil water content, salinity, and subsurface
<br />drainage. Details of model development, calibration, and application are provided in Burkhalter and
<br />Gates (2006). GMS is being used to systematically predict water table depth and salinity, soil water
<br />salinity, crop yield, rate and concentration of groundwater return flows, and non-beneficial
<br />consumptive use under fallow land in response to a suite of discrete improvement alternatives that
<br />could be adopted in subregions within both of the modeled study regions.
<br />The MODSIM object-oriented network flow modeling approach provides the foundation for creation
<br />of a geo-referenced water resources modeling system (GeoMODSIM). GeoMODSIM is embedded
<br />in ArcGISTM, bringing together the powerful MODSIM modeling capabilities with the extensive geo-
<br />processing and analysis capabilities of GIS. Geometric Networks constructed in ArcGISTM
<br />representing the water resources elements and their connectivity, are processed to become the geo-
<br />referenced MODSIM network. MODSIM allows development of custom applications in the Microsoft
<br />.NET framework in which modules can be attached and integrated with the model engine and
<br />solution algorithm. The GeoDSS implements the ANN Utility Module for stream-aquifer interaction
<br />modeling, a Reservoir Water Quality Transport Module, and a Water Quality Module (WQM) for
<br />solute transport modeling.
<br />' Fredericks, J., J. Labadie, and J. Altenhofen, "Decision Support System for Conjunctive Stream-aquifer
<br />Management," Journal of Water Resources Planning and Management, ASCE, 124 (2), 69-78,1998.
<br />2 Triana, E., J. Labadie, and T. Gates, "Application of GeoMODSIM to Water Quantity and Quality Management in
<br />the Lower Arkansas River Basin, Colorado." Proceedings of the Geographic Information Systems and Water
<br />Resources IV Spring Specialty Conference, American Water Resources Association, Houston, TX, 2006.
<br />3 Triana, E., "A Spatial Decision Support System for Basin Scale Assessment of Improved Management of Water
<br />Quantity and Quality in Stream-Aquifer Systems," Ph.D Dissertation, Department of Civil and Environmental
<br />Engineering, Colorado State University, Fort Collins, CO, Spring, 2008.
<br />4 McDonald, M. and A. Harbaugh, "A Modular Three-dimensional Finite-difference Ground-water Flow Model,"
<br />Techniques of Water Resources Investigations of the United States Geological Survey, Book 6, Chapter A1, USGS,
<br />Denver, CO, 1988.
<br />5 Zheng, C. and P. Wang, "A Modular Three-dimensional Multispecies Transport Model for Simulation of Advection,
<br />Dispersion and Chemical Reactions of Contaminants in Groundwater Systems: Documentation and User's Guide,"
<br />Contract Report No. SERDP-99-1, U. S. Army Engineer Research and Development Center, Vicksburg, MS, 1999.
<br />6 Brigham Young University, The Department of Defense Groundwater Modeling System: GMS v 3.0 Reference
<br />Manual, Environmental Modeling Research Laboratory, Provo, UT, 1999.
<br />Burkhalter, J. and T. Gates, "Evaluating Regional Solutions to Salinization and Waterlogging in an Irrigated River
<br />Valley." Journal of Irrigation and Drainage Engineering, ASCE, 132(1), 21- 30, 2006.
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