InVEST Model-Based Spatiotemporal Analysis of Water Supply Services in the Zhangcheng District

The Zhangcheng District is critically responsible for protecting water resources, preserving sand sources, and improving the ecological environment in Beijing. Quantitative evaluation research on ecosystem supply services this area are beneficial developing conservation planning establishing compensation mechanisms areas. In paper, based land use, meteorological, soil, field observation data of area, InVEST yield model used to estimate District. quantitatively analyzes spatiotemporal distribution characteristics basin influence different topographic factors. results show that average approximately 45 mm, there a degree spatial heterogeneity. total relatively small. resource southwest small, rainfall mountainous forest areas southeast high, its higher, high. high-value mainly distributed at 1500 3500 m 15°~40°; sunny slope greater than shady slope. With increase altitude slope, tends first then decrease.