【摘要】 针对环状灌区渠系与平原区高差变化不明显这两种因素交织作用下的灌区高精度河网提取难题,基于地表径流漫流模型基本原理,利用ArcSWAT平台的河网提取和流域划分模块,在原始DEM和实测河网的基础上,提出了河网提取的渠系分级挖深与预制流域耦合方法,并在具有耗散特性的玛纳斯河流域进行了应用。结果表明,该方法提高了灌区河网模拟和子流域划分精度,为分布式水文模型在灌区的推广应用提供了可供参考的前处理技术手段。更多还原

【Abstract】 In allusion to the problem of the extraction of river network with high precision from irrigation district under the effect composed of two factors,i.e.ring-shaped canal system in irrigation district and undistinguishable variation of the elevation difference in plain area,a method of river network extraction of coupling level-wise deepening for canal system with predefined watershed is put forward herein in accordance with the basic principle of the surface runoff model with the utilization of the modules for extraction of river networks and the division of watersheds based on ArcSWAT on the basis of both the original DEM and the measured river networks,and then it is applied to a dissipative river basin—Manas River Basin.The result shows that this method can not only enhance the precisions of both the simulation of river networks and the division of watersheds in irrigation district,but also can provide a reference for the preprocessing technology for the popularization and application of the distributed hydrological model in irrigation district.更多还原