The purpose of this study was to monitor the fl ow in the streams passing through rural regionsfor investigating the status of stream depletion located downstream from irrigation reservoirs.The Bonghyun and Hai reservoirs, located in Hai-myeon, which is in the city of Gosung inthe Gyeongnam Province, were selected for stream and watershed study. The stream fl owmonitoring was conducted seven times from March to September, 2011. The stream fl owwas measured at eight stations downstream from the two reservoirs. Stream depletion wasfound in most of the reservoirs downstream for the non-irrigation periods, and even in theirrigation periods when there were a lot of antecedent precipitation. The correlation analysisfor water quality data indicated that the correlation between BOD and T-N was highest forthe reservoirs. The correlation among BOD, T-N, and turbidity was high for both the Hai andBonghyeon reservoirs. Continuous monitoring of rural streams located downstream fromreservoirs are required to quantify the status of stream fl ow depletion, as well as to determinethe amount of environmental fl ow.
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