간접하수재이용에 따른 논에서의 수질 및 토양환경 영향 분석
Effects of Indirect Wastewater Reuse on Water Quality and Soil Environment in Paddy Fields
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초록
The objectives of this study were to monitor and assess the environmental impacts of indirect wastewater reuse on water qualityand soil in paddy fields. Yongin monitoring site (YI) irrigated from agricultural reservoir and Osan monitoring site (OS) irrigatedwith treated wastewater diluted with stream water were selected as control and treatment, respectively. Monitoring results forirrigation water quality showed a significant statistical difference in salinity, exchangeable cation and nutrients. Pond water qualityshowed a similar tendency with irrigation water except for the decreased difference in nutrients due to the fertilization impact. Soilchemical properties mainly influenced by fertilization activity such as T-N, T-P, and P2O5 were changed similarly in soil profiles ofboth monitoring sites, while the properties, EC, Ca, Mg, and Na, mainly effected by irrigation water quality showed a considerablechange with time and soil depth in treatment plots. Heavy metal contents in paddy soil of both control and treatment did notexceed the soil contamination warning standards. This study could contribute to suggest the irrigation water quality standards andproper agricultural practices including fertilization for indirect wastewater reuse, although long-term monitoring is needed to get morescientific results.
Abstract
The objectives of this study were to monitor and assess the environmental impacts of indirect wastewater reuse on water qualityand soil in paddy fields. Yongin monitoring site (YI) irrigated from agricultural reservoir and Osan monitoring site (OS) irrigatedwith treated wastewater diluted with stream water were selected as control and treatment, respectively. Monitoring results forirrigation water quality showed a significant statistical difference in salinity, exchangeable cation and nutrients. Pond water qualityshowed a similar tendency with irrigation water except for the decreased difference in nutrients due to the fertilization impact. Soilchemical properties mainly influenced by fertilization activity such as T-N, T-P, and P2O5 were changed similarly in soil profiles ofboth monitoring sites, while the properties, EC, Ca, Mg, and Na, mainly effected by irrigation water quality showed a considerablechange with time and soil depth in treatment plots. Heavy metal contents in paddy soil of both control and treatment did notexceed the soil contamination warning standards. This study could contribute to suggest the irrigation water quality standards andproper agricultural practices including fertilization for indirect wastewater reuse, although long-term monitoring is needed to get morescientific results.
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