环渤海陆源水污染输出分区研究

he purpose of this paper was to solve the spatial partition problem that land-origin water pollution affects the marine environment. A nested hierarchy and multi-scale output partition method was employed for analyzing land-origin water pollution. A multi-scale output partition of land-origin water pollution in Bohai Rim was accomplished by Arc Hydro Tools with 30 m horizontal resolution DEM data and vector stream data. Results show that drainage extraction based on known streams with high resolution DEM data could solve the extraction problems in flat areas. Watershed partition units covered most space of land-origin water pollution sources that could determine the key positions where land-origin water pollution affects marine environment. The coastal area is also important area affected by land-origin water pollution. Key positions in coastal area have been gradually determined through the multi-scale partition workflow in which the coastal area is divided into watershed partition units and coastline partition units. The borders of multi-scale watershed partition units and coastline partition units are nested and hierarchical.