Application of GIS technology on slope registration for the prevention of landslide
Woo, Chi Pong
There are about 58,000 registered man-made slopes in the Hong Kong Special Administrative Region (with an area of 1,100 Km2). As most of these slopes are situated in densely populated areas, management tools must be employed to collect information of the slopes in order to monitor their stability. The Civil Engineering and Development Department (CEDD) developed a computerized Slope Information System (SIS) containing data on all of those slopes. The SIS is a geographic information system which integrates different types of slope information linked to geographic and textual databases. It provides valuable information to geotechnical engineers, property owners, management companies and the general public. To support the SIS, the Survey Division of CEDD is commissioned to maintain and update a database of the registered slopes by the Computerized Slope Registration & Location Plan (CSRLP) System. The system was firstly introduced in 1996 and has been recently revamped in 2006. Besides supporting the SIS, CSRLP System also supports the Squatter Control Warning System involving analysis of slope, land status and dwellings which are susceptible to landslide hazard. The author would like to share with the readers the experience of revamping the CSRLP System and the future development.
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