关于流域边界细化的探讨

Discussion on Watershed Boundary Refinement

文章通过分析已有的流域数据及其存在的问题,探讨了流域边界细化的必要性,提出了在现有流域分区的基础上,采用水文分析方法,借助高分辨率DEM和DOM,参考相关的专题资料和其他行业资料,对流域边界进行精细化的工作思路,可为流域区域性自然资源调查监测提供范围保障。以赤水河流域(云南段)为例,提取并细化了流域边界及其子流域边界,证明了流域边界细化方法的可行性,细化的流域边界综合考虑了流域的自然属性和社会属性,方便了政府的需求和管理,从影像上看,不仅减少了流域边界不合理走向,更符合客观性和现实性。

By analyzing the existing watershes data and its existing problems,the paper discusses the necessity of refining the watershed boundary,and proposes a refined working idea of watershed boundary dased on the existing watershed zoning,using the hydrological analysis method,with the help of high-resolution DEM and DOM,and referring to relevant thematic data and other industry data,which can provide scope guarantee for the regional natural resources survey and monitoring of the basin.Taking the Chishui River basin(Yunnan section)as an example,the watershed boundary and its sub-watershed boundary are extracted and refined,which proves the feasibility of the watershed boundary refinement method.The refined watershed boundary takes into account the natural and social attributes of the watershed comprehensively,which is convenient for the government s needs and management.From the perspective of image,the unreasonable direction of the boundary is reduced,which is more in line with the objectivity and reality.