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Characteristics of Non-point Pollutants Discharge in a Small Agricultural Watershed during Farming Season

영농기 농촌 소유역의 비점오염물질 유출 특성

  • Published : 2005.06.30

Abstract

This study was conducted to identify the characteristics of non-point pollutants discharge in a small agricultural watershed during farming season. for this purpose, the Neoungchon watershed in Goesangun was selected as a typical agricultural area. Runoff and water quality data in the stream, the domestic sewage and the precipitation of the watershed were analyzed periodically from June 1 to November 6 in 2004 and pollutant loads were estimated. As a result the mean concentrations of BOD, SS, TN and TP in the stream were 3.0, 76.7, 8.7, 0.16 mg/L in rainy season and 2.4, 10.0, 3.5, 0.11 mg/L in dry season respectively. Daily discharge of non-point pollutant occurred above of 95% in rainy period. Measured pollutant loads in the watershed were $26.63kg/km^2/day$ of T-N and $0.62kg/km^2/day$ of T-P, within the range of other research results. Effluent loads based on guideline of total pollutant to stream management of MOE (Ministry of Environment) were less than delivery loads since the guideline could not reflect the agricultural practices, geomorphic and meteorological characteristics in an agricultural watershed.

Keywords

non-point polluatants;agricultural watershed;pollutant loads

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Cited by

  1. Monitoring of Hydrological and Water Quality in Dongjin-River Hengjeong Bridge Watershed for Agricultural Watershed Non-Point Pollutant Sources Management vol.54, pp.4, 2012, https://doi.org/10.5389/KSAE.2012.54.4.055
  2. Characteristics of TN and TP in Runoff from Reclaimed Paddy Field of Fine Sandy Loam vol.46, pp.6, 2013, https://doi.org/10.7745/KJSSF.2013.46.6.417