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http://dx.doi.org/10.15681/KSWE.2011.27.2.3

Land Use Characteristics in the Kyungan Watershed by Analyzing Long-Term Land Cover Data  

Han, Mideok (Department of Environmental Engineering and Biotechnology, Myongji University)
Kim, Jichan (Hydrological Survey Center)
Chung, Wookjin (Department of Environmental Engineering and Biotechnology, Myongji University)
Publication Information
Journal of Korean Society on Water Environment / v.27, no.2, 2011 , pp. 159-166 More about this Journal
Abstract
The use of land cover was sharply changed during 1975~2007 in the Kyungan watershed $(561.12 km^2)$. The changes occurred over an area of more than $227.65 km^2$ during the overall period at changing rates of 1.04% per year for water area, 1.79% per year for residential area, 2.99% per year for bare area, 3.03% per year for wetland area, 3.04% per year for grass area, 0.87% per year for forest and 2.32% per year for agriculture area. Water, residential, bare and wetland areas increased, while grass, forest and agriculture areas decreased during the last 32 years. BOD concentrations of representative sites for each sub-watershed continuously increased until the early 2000s as residential area increased with the highest discharged load, but decreased after the mid 2000s except upper Kyungan watershed. Such decline appears to be associated with the planning of Total Maximum Daily Load management for Gwangju city and expansion of waste water treatment plant. It is necessary to control land use/cover changes of the upper watershed and to prepare appropriate watershed management system for improvement in river environment including water quality, stream flow and bio-diversity.
Keywords
Geographic Information System (GIS); Kyungan watershed; LULC change; TMDL management system; Water quality;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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