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Title: MODELING MANURE-BORNE PATHOGEN TRANSPORT WITH RUNOFF AND INFILTRATION

Author
item ROODSARI, REZA - U. OF MD STUDENT
item Pachepsky, Yakov
item Shelton, Daniel
item SHIRMOHAMMADI, PROFESSOR - U. OF MARYLAND
item Sadeghi, Ali
item Starr, James

Submitted to: ASAE Annual International Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 6/1/2003
Publication Date: 7/27/2003
Citation: Roodsari, R., Pachepsky, Y.A., Shelton, D.R., Shirmohammadi, P., Sadeghi, A.M., Starr, J.L. 2003. Modeling manure-borne pathogen transport with runoff and infiltration. [Abstract]. ASAE Annual International Meeting. p. 174.

Interpretive Summary:

Technical Abstract: Two kinematic wave models for surface runoff and subsurface flow were coupled with the Green-Ampt infiltration model to simulate surface and subsurface transport of manure-borne FC. Finite difference and method of characteristic were used to solve transport equations of overland and subsurface flow, respectively. Green & Ampt, Philip, and Schmid (modified Green & Ampt) infiltration models were also applied to vertical water flow movement. Because of more reasonable predictions, Green & Ampt was selected to couple a one-dimensional kinematic wave model for simulation of FC concentrations. Model simulations were compared to the experimental data collected from lysimeter-scale (6.7m X 7.3 m) site. Only low concentrations of fecal coliforms were available for surface transport when the runoff was initiated. The model simulated the spatial and temporal distribution of FC in runoff assuming an exponential release fo FC from manure. Simulations of subsurface concentrations showed a delay indicating possible need for two-dimensional description of subsurface flow.