Analysis of Ecological Factors Affecting Beijing City Based on Geographical Detector

Remote-sensing-technology can evaluate ecological environment quickly, objectively and quantitatively. This paper used the remote-sensing ecological model to inverse ecological indexes based on satellite images and basic geographic data in Beijing, China. And then explained causes of such above ecological environment from seven factors, consisting of elevation, land use, geomorphic, soil, gridded population, gridded GDP and administrative division, respectively and their interactions using geographical detector. Results showed that land use, elevation and geomorphic type attributed mostly to such ecological index, whose values is 0.455, 0.446 and 0.407, respectively. Moreover, all pairwise interactions among seven factors nonlinearly enhanced effects on ecological indexes. It indicated that interactions among factors attributed ecological index largely.