| It was strongly hit in5-12earthquake, and its surface subjected to the intense damage。After the earthquake, along with a variety of secondary geological disasters, a large number of non-forest land appeared。In this study,39sites of non-forest land were choesd to carry out the investigations in beichuan。 By using principal component analysis,cluster analysis and AHP, The classification and evaluation of site conditions were given。We had the results as follows:(1) According to the study, forestland sites damaged of landslide are divided into8categories, forestland sites damaged of debris flow are divided into3categories, forestland sites damaged of other disasters are divided into6types.(2) Landslide disaster damaged woodland type group, site quality plots to1,9,12,13, be suitable for afforestation by sorting on the score, the evaluation results:a small number of the site of several plots of medium qualityneed to carry out major input to afforestation,67%of the sample quality rated as excellent, only a small amount of input or not to invest on the appropriate afforestation; debris flows damaged woodland type groups, and other disaster damage in the group of woodland types,site quality is good overall, rated as excellent, suitable for a small amount invested or not invested directly afforestation. |
PDF Full Text Request