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수질오염총량 단위유역의 목표수질 달성여부 평가를 위한 부하지속곡선 적용성 연구
황하선 ( Ha Sun Hwang ),박배경 ( Bae Kyung Park ),김용석 ( Yong Seok Kim ),박기중 ( Ki Jung Park ),천세억 ( Se Uk Cheon ),이성준 ( Sung Jun Lee ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.6
The purpose of this study was evaluated on achievement of the Target water quality (TWQ) with Load Duration Curve (LDC) as well as materials collected through the implementation of Total Maximum Daily Load (TMDL), targeting 41 unit watersheds in the Nakdong River Basin in korea, and examines the adequacy of the LDC method to evaluate the TWQ by comparing methods through current regulations. It aims to provide basic materials for TMDL development in Korea. This determination resulted from the fact that the measured data placed on the LDC mean that they are beyond TWQ in a certain condition of water flow when actually measured load values were displayed in a form of LDC. In addition to water quality surveys, it is considered that information on the level of damage in a water body by water flow grade can be utilized as a basic material to identify compliance with the total admitted quantity, and establish rational plans to improve water quality. This information helps in the identification of the degree of damage in water quality according to water flow.
GeoWEPP을 이용한 침엽수림 지역 유출특성 예측 및 다양한 식생 피도에 따른 유출량 평가
최재완 ( Jae Wan Choi ),신민환 ( Min Hwan Shin ),천세억 ( Se Uk Cheon ),신동석 ( Dong Seok Shin ),이성준 ( Sung Jun Lee ),문선정 ( Sun Jung Moon ),류지철 ( Ji Cheol Ryu ),임경재 ( Kyoung Jae Lim ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.4
To control non-point source pollution at a watershed scale, rainfall-runoff characteristics from forest watersheds should be investigated since the forest is the dominant land use in Korea. Long-term monitoring would be an ideal method. However, computer models have been utilized due to limitations in cost and labor in performing long-term monitoring at the watersheds. In this study, the Geo-spatial interface to the Water Erosion Prediction Project (GeoWEPP) model was evaluated for its runoff prediction from a coniferous forest dominant watersheds. The R2 and the NSE for calibrated result comparisons were 0.77 and 0.63, validated result comparisons were 0.92, 0.89, respectively. These comparisons indicated that the GeoWEPP model can be used in evaluating rainfall-runoff characteristics. To estimate runoff changes from a coniferous forest watershed with various cover degree scenarios, ten cover degree scenarios (10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%) were run using the calibrated GeoWEPP model. It was found that runoff increases with decrease in cover degree. Runoff volume was the highest (206,218.66 m3) at 10% cover degree, whereas the lowest (134,074.58 m3) at 100% cover degree due to changes in evapotranspiration under various cover degrees at the forest. As shown in this study, GeoWEPP model could be efficiently used to investigate runoff characteristics from the coniferous forest watershed and effects of various cover degree scenarios on runoff generation.