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Ewing, Loyd K. Gingerich, Michael Allan 2011-05-07T13:06:24Z 2011-05-07T13:06:24Z 10000-01-01 1991 "Clean water is essential to agriculture, industry and urban development. Protecting clean water from pollution is an important goal. One category of water pollution is called ""Nonpoint Source Pollution"" (NPS). This category includes all sources that do not issue from a distinct pipe or outlet. Most of NPS pollution does migrate with surface and subsurface water from some location to water bodies. It is important that scientists and engineers study NPS pollution and develop models that can predict movement of the NPS pollution. One part of modelling the NPS pollution movement is modelling the interaction between surface and subsurface flow." A surface element concept was used to incorporate the Saint-Venant equations into a single energy-mass continuity equation similar to Richards equation for groundwater flow. The similarity of the equations was utilized by developing a single weighted residual equation for surface and subsurface flow that could be solved using a finite element analysis technique. The finite element algorithm was developed and coded in the 'C' language. The finite element program was used to simulate surface and subsurface flow in a laboratory model consisting of a soil bin and rainfall simulator. The simulation results were compared to measured responses of the laboratory model. The results of the simulation closely matched those of the laboratory model. A low water balance error was achieved. The surface water flow rate and soil pressure response predicted by the simulation were within the range of values produced by the laboratory model. Made available in DSpace on 2011-05-07T13:06:24Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9136600.pdf: 5682812 bytes, checksum: 2a2fe1db8db6080216598a35fad4c75c (MD5) Previous issue date: 1991 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:50:15Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:22:56-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9136600 (UMI)AAI9136600 http://hdl.handle.net/2142/21360 eng Copyright 1991 Gingerich, Michael Allan Hydrology Engineering, Agricultural Engineering, Civil Surface-subsurface interactive flow simulation using a surface element concept text Agricultural and Biological Engineering Agricultural Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.