Study on Ecological Services Evaluation of Water Conservation using Multi-source Remote Sensing Products

Water conservation is one of the ecological service functions of terrestrial ecosystem, which is of great significance for monitoring and protecting the ecological environment using remote sensing methods. Danjiangkou ecological area is an important ecological service function region of water conservation in China. Aimed at the distribution and dynamic change of water conservation function, this paper quantitatively evaluates the regional water conservation capacity based on the water balance principle in 2015 and 2020. The remote sensing products such as Terra, Landsat Satellite data, SRTM and so on are used. Based on the results, combined with the changes of land use, precipitation and temperature, the spatial difference and interannual variation are analyzed. The results show that the type of land use plays a decisive role for the maintaining and improving of regional water conservation, and the climatic conditions such as precipitation and temperature have a great impact on the fluctuation of water conservation capacity.