基于DEM 的小流域信息提取技术 在生态治理中的应用 -以天津市蓟县黄土梁子为例

针对天津市北部山区蓟县黄土梁子小流域, 通过1 B10 000 地形图的等高线内插形成DEM, 提取了小流域的 边界、坡度、植被类型、植被盖度、土地利用现状、土壤侵蚀等信息。根据三道防线的划分原则和指标, 运用GIS 的空 间分析和空间叠加方法, 结合现场调查, 确定了小流域的生态治理范围, 并进行了小流域治理措施的合理配置。将 DEM 信息提取运用于小流域生态治理, 为水土保持治理措施与成效分析以及水文特征研究提供了成熟的技术 体系。 Thro ug h the interpolation method o f the elevatio n contours in the 1: 10 000 to pog r aphic map to form the DEM, the bo unda ry, slo pe, vegetat ion type, v egetation co verag e, land use, and soil ero sion informatio n of the small water shed in Huangtu2 liangzi o f Jinx ian County lo cat ed in the no rthern mountain area of Tianjin w ere extr acted. Accor ding to the division pr inciple and index for t he three lines o f defense, the spatial analysis and spat ial o verlay methods in GIS and field investig atio n w ere used to determ ine the scope of ecolog ical manag ement in the small w atershed and t he reasonable allo cation o f manag ement measures. The research applies DEM information ex tr act ion to the eco lo gical management o f small water sheds, w hich can pr ov ide a matur e technical sy st em fo r the management and research of so il and water conserv ation, effect analy sis, and hydro log ic char acter istics. 天津市水务科技项目/ 生态清洁型小流域建设技术模式研究( KY20072 12)