Modeling Phosphorus Transport in Grass Buffer Strips
Publication: Journal of Environmental Engineering
Volume 115, Issue 2
Abstract
An event‐based computer model, GRAPH, was developed to simulate phosphorus (P) transport in grass buffer strips (GBS) by incorporating submodels into SEDIMOT II, a stormwater and sediment transport model developed for strip mine reclamation. GRAPH considers the effects of advection processes, infiltration, biological uptake, P desorption from the land surface to runoff, adsorption of dissolved P to suspended solids in runoff, and the effects of changes in sediment size distribution on P transport. Required input data include: rainfall intensity and duration, an inflow hydrograph, a sediment graph, sediment size distribution, GBS dimensions and hydraulic characteristics, inflow graphs for dissolved P, P desorption and adsorption reaction coefficients for soil and plant matter, and the P content of each soil particle size class. GRAPH simulates time varying infiltration, runoff discharge, sediment yield, particle size distribution, and dissolved and sedimentbound P discharge along with sediment and P trapping efficiencies in GBS. GRAPH was verified using data from experimental field plots. Model predictions and observed P transport in the GBS compared favorably.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 115 • Issue 2 • April 1989
Pages: 409 - 427
Copyright
Copyright © 1989 ASCE.
History
Published online: Apr 1, 1989
Published in print: Apr 1989
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