基于Arc Hydro Tools的涪江流域特征自动提取分析

发布时间：2018-02-12 20:06

本文关键词： Arc Hydro Tools DEM 自动提取流域特征坡度地形标准差　出处：《西南师范大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：以涪江流域为例,基于1∶5万和1∶25万两种比例尺数字高程模型(DEM),利用Arc Hydro Tools对DEM预处理后进行流域提取,分析通过不同方案提取的河网、流域面积等相关参数,同时针对不同分辨率河网出现差异地段的地形坡度和地形标准差进行分析.实验结果表明:提取结果的精度在总体上是符合要求的,但是在地势平坦区域人类活动干扰较大的地区,提取的结果与实际相差较大.从提取的效率和实验结果的精度两方面来看,基于Arc Hydro Tools的流域特征自动提取是切实可行的.
[Abstract]:Taking Fujiang River Basin as an example, based on two scale digital elevation models of 1: 50 000 and 1:25 000, this paper uses Arc Hydro Tools to extract DEM from the river basin after pretreatment, and analyzes the relevant parameters such as river network and basin area extracted by different schemes. At the same time, the topographic slope and topographic standard deviation of different sections of river network with different resolutions are analyzed. The experimental results show that the accuracy of the extraction results is in accordance with the requirements in general. However, in areas where human activities are more disturbed in flat terrain, the extraction results are quite different from the actual ones. The automatic extraction of watershed features based on Arc Hydro Tools is feasible from the two aspects of extraction efficiency and precision of experimental results.
【作者单位】：重庆市气候中心;
【基金】：中国气象局公益性行业(气象)科研专项(GYHY201506014)
【分类号】：P208;P333

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