| Large number of landslides, collapse, debris flow, rockfall and other secondary geological disasters were induced by Wenchuan earthquake, and a large number of high and steep slope and loose deposits were turned up which caused great damage to the ecological environment. These disasters are the focus of revegetation work after earthquake. Rapid evaluation of the security and stability of the damaged forest landis extremely important before carrying out revegetation work. This studybased on Beichuan Country constructed a system by qualitative analysis and semi-quantitative analysis which was suitable for forest land security and stability fast evaluation after earthquake damage.The main findings were as follows:(1)This study took qualitative analysis on the stability of damaged forest and influence factors according to the wild geological investigation data combined with the previous researches results. Also itsemi-quantitatively defined the weight of stability rapid evaluation factors such as slope, slope height, rock mass strength, characteristics of structural face,rock mass structure type by interactionrelated matrix and valued the indexes. What’s more, this study analyzed the probability of debris flow using corresponding technical standard.(2)It constructed damaged forest slope stability index rapid evaluation system using quality analysis combing with semi-quantitative analysis. The stability of damaged forest was divided into four grades;stability, sub-stability, sub-unstability, unstability.(3)The study constructed security and stability rapid evaluation system of damaged forest and raised the method of security and stability rapid evaluation system of damaged forest according the research. |
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