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KMID : 1024520140230010007
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Journal of the Environmental Sciences
2014 Volume.23 No. 1 p.7 ~ p.23
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Quantitative Assessment of Nonpoint Source Load in Nakdong River Basin
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Kwon Heon-Gak
Lee Jae-Woon
Cheon Se-Uk
Yi Youn-Jeong
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Abstract
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This study estimates unit for the nonpoint source(NPS), classified according to the existing Level-1(large scale) land cover map, by monitoring the measurement results from each Level-2(medium scale) land cover map, and verifies the applicability by comparison with previously calculated units using the Level-1 land cover map. The NPS pollutant loading for a basin is evaluated by applying the NPS pollutant unit to Dongcheon basin using the Level-2 land cover map. In addition, the BASINS/HSPF(Better Assessment Science Integrating point & Non-point Sources/ Hydrological Simulation Program-Fortran) model is used to evaluate the reliability of the NPS pollutant loading computation by comparing the loading during precipitation in the Dongcheon basin. The NPS pollutant unit for the Level-2 land cover map is computed based on precipitation measured by the Sangju observatory in the Nakdong River basin.
Finally, the feasibility of the NPS pollutant loading computation using a BASINS/HSPF model is evaluated by comparing and analyzing the NPS pollutant loading when estimated unit using the Level-2 land cover map and simulated using the BASINS/HSPF models.
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KEYWORD
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Nonpoint source , HSPF , Land cover map
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