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利用GIS技术,基于高分辨率DEM数据,讨论流域数字河网提取方法与过程,并通过乌鲁木齐河流域的应用实例,获得出山口英雄桥水文站以上山区流域的地形坡度、流域边界和数字河网等相关流域特征信息及其空间分布特征,讨论在不同汇流累积阈值条件下数字河网提取相关信息的变化情况,提供河网空间分布图,为更直观、更系统地认识乌鲁木齐河上游山区流域水系分布特征提供科学参考。
Using GIS technology, based on high-resolution DEM data, discusses the method and process of river network digital river network extraction, and through the application examples of Urumqi River Basin, obtains the terrain gradient, watershed boundary and digital river network And other related characteristics of the watershed and its spatial distribution characteristics, discusses the changes of digital river network extraction information under different confluence cumulative threshold conditions, provides the river network spatial distribution map, in order to more intuitively and systematically understand the upper reaches of the Urumqi River basin watershed Distribution features provide a scientific reference.