• Title/Summary/Keyword: Agriculture drainage

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A Study on Selection Method of Management Watershed for Total Pollution Load Control at Tributary (지류총량관리를 위한 관리유역 선정 방법에 관한 연구)

  • Hwang, Ha Sun;Lee, Sung Jun;Ryu, Jichul;Park, Ji Hyung;Kim, Yong Seok;Ahn, Ki Hong
    • Journal of Korean Society on Water Environment
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    • v.32 no.6
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    • pp.528-536
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    • 2016
  • The purpose of Total Pollution Load Control at Tributary is to obtain maximum improvement effect of water quality through finding the most impaired section of water-body and establishing the proper control measure of pollutant load. This study was implemented to determine the optimal management of reach, period, condition, watershed, and pollution source and propose appropriate reduction practices using the Load duration curve (LDC) and field monitoring data. With the data of measurement, LDC analysis shows that the most impaired condition is reach V (G4~G5), E group (flow exceedance percentile 90~100%) and winter season. For this reason, winter season and low flow condition should be preferentially considered to restore water quality. The result of pollution analysis for the priority reach and period shows that agricultural nonpoint source loads from onion and garlic culture are most polluting. Therefore, it is concluded that agricultural reuse of surface effluent (storm-water runoff with non-point sources) and low impact farming that includes reducing fertilization and controlling the height of drainage outlet are efficient water quality management for this study watershed.