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Drainage Control and Prediction of Slope Stability by GIS-based Hydrological Modeling at the Large Scale Open Pit Mine  

SunWoo, Choon (한국지질자원연구원 지반안전연구부)
Choi, Yo-Soon (서울대학교 지구환경시스템공학부)
Park, Hyeong-Dong (서울대학교 지구환경시스템공학부)
Jung, Yong-Bok (한국지질자원연구원 지반안전연구부)
Publication Information
Tunnel and Underground Space / v.17, no.5, 2007 , pp. 360-371 More about this Journal
Abstract
This paper presents an application of drainage control and slope stability by GIS-based hydrological modeling to control the surface water from an operational point of view. This study was carried out on a region of Pasir open-pit coal mine, Indonesia. A detailed topographical survey was performed at the study area to generate a reliable DEM (Digital Elevation Model). Hydrology tools implemented in ArcGIS 9.1 were used to extract the characteristics of drainage system such as flow direction, flow accumulation and catchment area from DEM. The results of hydrological modeling and spatial analysis showed that current arrangement of pumping facility is not suitable and some vulnerable places to erosion exist on the bench face due to concentrated surface runoff. Finally, some practical measures were suggested to optimize the design of drainage system and to monitor the slope stability by the surface water management at the study region during heavy rainfall.
Keywords
Drainage control; Open pit; GIS; Digital Elevation Model; Slope stability;
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