The application of GIS in Mapping Landslide Susceptibility in Măhăceni Tableland

<p>As a first step forward in regional hazard management, the likelihood frequency ratio model was<br />used to produce a landslide susceptibility map in Mahaceni tableland. We constructed the<br />essential spatial database of landslides using GIS techniques. Landslide inventory followed<br />measurements on 73 new and partial stabilized landslides, using a Magellan Explorist 600 Gps<br />with a 3m precision on field. Landslide data was then processed in GIS and we realized a<br />present-day susceptibility map in Măhăceni Tableland. The map was then verified on field and<br />the results were validated. The affecting factors such as lithology, slope angle, elevation,<br />aspect, land use, distance to stream network, fragmentation depth and slope curvature are<br />recognized. The relationship between the factors and the landslides were calculated using<br />frequency ratio model. The relationships were overlaid to determine each factor’s rating for<br />landslide susceptibility mapping. By combining each factor’s weighted values, we could<br />realize the landslide susceptibility map for Măhăceni Tableland. Information on susceptibility<br />map could be useful for explaining the known existing landslides, making emergency<br />decisions and relieving the efforts on the avoidance and mitigation of future landslide hazards.