中小河流的河道多级单元网格划分研究

Study on Multi-Level Element Grids Division of River Channels in Small and Medium Rivers

科学合理的河道管理对于维护良好的水生态环境具有重要作用。以甘肃省定西市境内的一条中小河流关川河为例,采用河道分段网格划分方式进行多级单元网格划分,依据岸线功能区对东河、西河交汇口—红岘儿河段进行了一级网格划分,共划分了11个4类岸线功能区网格,依据岸线控制线对巉口水文站—称钩河汇合口河段进行了二级网格划分,并根据临水控制线与外缘控制线间的带状区域确定了二级网格面积,单元网格划分结果与河道实际情况相符合。依据单元网格划分结果进行河道监测设施布设可以及时掌握河道的动态信息,为河道精细化管理提供技术支撑。

Scientific and reasonable river channels management plays an important role in maintaining a good water ecological environment.Taking Guanchuan River,a small and medium-sized river in Dingxi City of Gansu Province as an example,multi-level element grids division was conducted by the river channel segmented grid division method. According to the shoreline function area,the primary grid division was carried out on the Hongxianer section located on the confluence of Donghe and Xihe,which was divided into 11 grids of 4 types of shoreline function zones. According to the shoreline control line,the section from Chankou Hydrological Station to the Chengou River confluence was divided into secondary grid,and the secondary grid area was determined according to the band-shaped area between the waterfront control line and the outer edge control line. The results of the element grids division are consistent with the actual situation of the river channels. The layout of the river monitoring facilities according to the element grids division results can grasp the dynamic information of the river channels in time and provide technical support for the fine management of the river channels.