Analysis of geographic environmental factors on forest landscape dynamics of Yiluo River basin
地理环境因素对伊洛河流域森林景观的影响

Great attention has been paid to the forest landscape change,and the robust modeling of these processes is important for policy as well as academic concerns.The science of forest landscape change analysis is advancing rapidly,with the development of increasingly sophisticated,reliable and accessible tools and techniques.Perhaps the most effort has been devoted to the modeling of deforestation processes including agricultural expansion.This paper concerns a relatively small area of Yiluo River Basin where considerable national and international attention has been paid to slow down the expansion of land for non-forests into the remaining natural forests.In the present study,we reconstructed the former forest landscape structure and elucidated the landscape change from 1983 to 1999.Two sets of maps were used for analyses: forest resources distribution maps of 1983 and 1999.The result showed that there was an increase in the area of the forest landscape from 960.34 km2 in 1983 to 1175 km2 in 1999.Then the approach adopted here is to examine the degree to which forest landscape conversion can be attributed to a set of factors that have been identified as significant at broader scales,namely topography,distribution of the village clusters(centroids),distance from villages(centroids) and forest edge(1983).By using "spatial analysis" in Arc/gis 8.3,the correlation on forest landscape change and driving factors were constructed.The study finds that forest landscape conversion in the concerned area is largely explained by elevation,slope,and village proximity.