Optimal Allocation of Pollutant from Non-point Sources in Watershed

概要

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A linear programming model is developed to optimize the allocation of pollutant from non-point sources in a watershed. The use of Arc View GIS software is incorporated to calculate the flow length from each land management unit as a non-point source to the outlet of the watershed. The formulated model is applied to a subcatchment of Yasu river basin in Shiga prefecture, Japan. Optimization is carried out at different weight values depending on decision-maker's preference order of land management unit type with respect to mean load discharged from unit area. It is observed that optimum discharged load of total nitrogen changes with the change in preference order. This model can be useful for determining optimum discharged pollutant loads from different land management units of a watershed for different preference orders based on need of decision-makers.
日本雨水資源化システム学会の論文