基于Arc Hydro Tools的广西小流域划分研究

发布时间：2019-01-05 01:43

【摘要】：为实现广西地区小流域的科学管理,加快水土保持信息化建设,以25 m分辨率DEM为基础,根据广西地形地貌特点,结合行政区划、水系分布等,对广西地区进行了小流域划分研究。为此,采用Arc Hydro Tools水文数据模型建立小流域自动划分模型进行初步划分,并针对平原区、海岸带等自动划分效果不理想的区域,利用人工处理方式对该区域进行修正。经过拓扑检查、属性编码和质量控制后,最终完成对全广西共计9 631条小流域边界的提取。结果表明:所提取小流域面积大多集中在10~50 km~2之间,无小于3 km~2和大于100 km~2的小流域,符合标准规范;自动化处理模型可对小流域进行快速划分,处理面积达到82.88%;有针对性的人工处理可提高划分精度,使得结果更为理想。研究成果对小流域信息化建设、水文模拟具有重要参考价值。
[Abstract]:In order to realize the scientific management of small watersheds in Guangxi and speed up the information construction of soil and water conservation, based on 25m resolution DEM, according to the characteristics of topography and geomorphology of Guangxi, combining with administrative division and water system distribution, etc. In this paper, the division of small watersheds in Guangxi is studied. Therefore, the Arc Hydro Tools hydrological data model is used to establish the automatic watershed division model for preliminary division, and the artificial processing method is used to correct the area which is not satisfactory in the plain area, coastal zone and other areas where the automatic division effect is not satisfactory. After topological examination, attribute coding and quality control, the extraction of 9,631 small watershed boundaries was completed. The results show that most of the extracted small watershed areas are between 10 ~ 50 km~2, and no small watershed with less than 3 km~2 and more than 100 km~2 conforms to the standard specification, and the automatic treatment model can divide the small watershed quickly, and the treatment area can reach 82.88%. The manual processing can improve the precision of division and make the result more ideal. The research results have important reference value for small watershed information construction and hydrological simulation.
【作者单位】：南宁市城规地理信息技术中心;广西师范学院北部湾资源利用与环境演变重点实验室;广西师范学院地理科学与规划学院;中国科学院水利部成都山地灾害与环境研究所;
【基金】：国家自然科学基金(41661043) 广西自然科学基金(2015GXNSFAA139234) 广西科技重点研发计划(AB16380318)
【分类号】：P208;P333

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