Manuscript Number : SISRRJ18123

Slope failure become major issues and problem in Selangor State, especially involve with the development in a specific area. This research study conducted using GIS in determined the environmental sensitivity development based slope failure. GIS techniques required several data for analysis, namely elevation data and contour maps, land used map data, original map data, and vegetation map data; which can be received from government department or agencies, height and topographic data maps, data from internet sources, and data from documentation includes publications. The selected area for this research study is Selangor State, which highlighted rapid development of land used for human activities. Accordingly, the first step will be entering all data into database, which involve with the physical and environment components; while the second step will be identification and preparation based on the data layers that required in the research study; and the third step are storing data into database for designed. The storage is referring to non-spatial data elements and geographical data. Results indicate the sensitivity slope with normal sensitive area covers 1.7% and most sensitive area covers 5.7%, which lies in East towards Ulu Selahgor, Gombak, and Ulu Langat. Continuously, the prohibited development area is covering about 7.4% of sensitive area in the 25% to 40% degree of steepness in the area, which represents a critical area of 603 km2 of the 8154 km2 area in Selangor State. Build up activities within slope area can be categorized as industrial, institutional and facilities, residential, business and services, and open space and recreational; while the steepness parameter determined 0 % to 15 % is no risk area for slope failure, while 15 % to 25 % are less risk area for slope failure, 25 % to 40 % are moderate risk area for slope failure, and more that 40 % are high risk area for slope failure. Majority residential area is located at Gombak and Hulu Langat with slope sensitivity is between 25 % to 40 % degree of steepness, which is at high risk of slope failure.