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Estimation of Agricultural Water Quality Using Classification Maps of Water Chemical components in Seonakdong River Watershed
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 Title & Authors
Estimation of Agricultural Water Quality Using Classification Maps of Water Chemical components in Seonakdong River Watershed
Ko, Jee-Yeon; Lee, Jae-Sang; Kim, Choon-Song; Jeong, Ki-Yeol; Choi, Young-Dae; Yun, Eul-Soo; Park, Seong-Tae; Kang, Hwang-Won; Kim, Bok-Jin;
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 Abstract
To understand the status of water quality and work out a suitable countermeasures in Seonakdong watershed which has poor agro- environmental condition because of severe point and non-point source pollution by popularized city and near sea, we investigated the pollution sources and water quality from '03 and '05 and the result were mapped with GIS and RS for end-users's convenient comprehense and conjunction of water quality and geological data. The most degraded tributary was Hogeo stream which was affected directly by highly popularized Gimhae city, the main pollution source of the watershed. The pollution of tributaries in watershed increased the T-N of main body that reached over 4 mg/L during dry season. Pyeonggang stream and the lower part of main water way were suffered from high salt contents induced near sea and the EC value of those area were increased to 2.25 dS/m. The delivered loads of T-N and T-P were largest in Joman river as 56% and 61% of total delivered loads 1mm tributaries because of lots of stream flow. When Management mandate for irrigation water in Seonakdong river watershed was mapped for estimating integrated water quality as the basis of classification of EC and T-N contents in water, Hogeo and Shineo catchments were showed the requiring countermeasures none against nutrients hazard and Pyeonggang catchment was the vulnerable zone against nutrients and salts hazard. As the result, Seonakdong watershed had very various status of water quality by characteristics of catchments and countermeasures for improving water quality and crop productivity safely should changed depend on that.
 Keywords
Seonakdong watershed;water quality;classification map;T-N;EC;
 Language
Korean
 Cited by
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