Abstract

The purpose of this study was to analyze the water quality spatial characteristics for depleted downstreams of agricultural reservoir. The Bonghyun and Hai reservoirs, located in Hai-myeon, which is in the city of Gosung in the Gyeongnam Province, were selected for stream and watershed study. The stream flow monitoring was conducted eight times from March October, 2013. The stream flow was measured in eight stations downstream from the two reservoirs. Stream depletion was found in most of the reservoirs downstream for the non-irrigation periods, and even in the irrigation periods when there were a lot of antecedent precipitation. The correlation analysis for water quality spatial data indicated that the correlation between Bonghyun downstreams were highest for the reservoirs. Continuous monitoring of rural streams located downstream from reservoirs are required to quantify the status of stream flow depletion, as well as to determine the amount of environmental flow.

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