The Impact of Ecological Restoration on the Surrounding Environment in Saihanba Area

Abstract

In order to study the impact of ecological restoration of Saihanba on the environment, based on the data of Saihanba from 1962 to 2021, including forest coverage area, forest volume, water storage, carbon dioxide absorption and oxygen release, the ecological environment evaluation system of Saihanba was constructed. By consulting the relevant literature, the relevant parameters are determined as the indexes of forest environment evaluation. The entropy weight method is used to give the index weight, and the TOPSIS method is used to analyze the advantages and disadvantages of the indexes. Because the score after restoration is significantly higher than that before restoration, the restoration effect of Saihanba ecological area is remarkable. The forest area of Saihanba was selected as an index to affect the surrounding environment, and the data of forest area of Saihanba from 2010 to 2020, as well as the data of dust weather days, gale days and green area in Beijing Statistical Yearbook in the same period were selected. Using the DEA-CCR model, the target rate of return is obtained, that is, the impact of the increase in the forest area of Saihanba on Beijing 's dust prevention capacity. The results show that with the increase of the forest area of Saihanba, the ability of wind and sand prevention in Beijing area is gradually enhanced.