GIS Evaluation on Groundwater Resources of Sanjiang Plain, China

By employing GIS data management and spatial analysis, established spatial database for groundwater and combined with dynamic balance method, accomplished 3D visualization of groundwater level, evaluated the spatial distribution of groundwater resources and the dynamic variation of groundwater level; The result shows that groundwater level continuously descended since 1997; the serious decadence of groundwater level is 5.8 m , and waned 6.89times10
⁸
m
³
to 2005. Relevant measures should be taken to mitigate the pressure in the region.