Effects of ecological environmental protection in Qinghai Lake basin based on PSR model

Due to human activities and the effects of natural factors such as environmental changes, ecological environmental regulation and self-recovery capability in Qinghai Lake basin, the ecological security problem was become seriously. Using MODIS NDVI product, meteorological data of four counties in Qinghai Lake basin and social data in 2010, this study built a “pressure-state-response (PSR)” model to evaluate the effect of the ecological environment protection of Qinghai Lake basin between 2002 and 2010. On this basis, this study extracted 11 natural resources and social resources data in Qinghai Lake basin to analyze the composite index by the analytic hierarchy process. The main conclusions are as follows. The ecological environment protection of Qinghai Lake basin was in serious condition, vegetation degradation area was more than 2 times of vegetation restoration area between 2002 and 2010. After the implementation of environmental engineering from 2008 to 2010, the situation was on the turn and the deterioration area reduced to the same as the vegetation restoration area. The ecological environment of Qinghai Lake basin had improved, but the regional ecological environment was still in degradation, or even worsen. The 3 415.36 km2 area of Tianjun County was in alert status. The 2 324.57 km2 area of Gonghe County was in alert status. They occupied a land area of 25% and 38%, respectively. More serious situation was found in Haiyan County, where 284.98 km2 area region was in severe danger of ecological security and occupying a land area of 18%, the rest was in a state of mild risk. Finally, according to the results of evaluation, we put forward some suggestions to slow the progress of the ecological environment deterioration and improve the environmental governance planning advice.