摘要
在流域地貌特征提取中采用AGREE算法的关键技术,将水系形态特征融入数字高程模型形成水文数字高程模型。通过分析不同集水阈值(0.2km2、1km2、2km2、3km2、4km2、5km2)、不同比例尺(万分之一、5万分之一、25万分之一)、不同流域面积标准(0.2km2、1km2、2km2、3km2、4km2、5km2)下流域地貌参数,得出地貌参数的稳定性与河流分级有关,当河流级别达到5级时,参数不随比例尺、集水阈值、面积标准变化而变化。在缺资料地区洪水预报中,只要具备一定精度的地形数据及相应水系,即可满足流域地貌参数的获取。地貌瞬时单位线法相对较稳定,适用于无资料地区中小流域洪水预报。
In this paper, AGREE algorithm was applied to extract the geomorphic features. The system adjusts the surface elevation of the DEM to be consistent with a stream, which is formed hydrological digital elevation models integrate digital elevation models.Analysis was on the topography parameters derived from different catchment threshold（0.2km2, 1km2, 2km2, 3km2, 4km2, 5km2）,different scales（1：10000, 1：50000, 1：250000）, and different areas of the standard basin（0.2km2, 1km2, 2km2, 3km2, 4km2,5km2）. The result shows that the topography parameters do not change with catchment threshold, scales and area of the standard if the river orders is 5.
出处
《水文》
CSCD
北大核心
2015年第5期30-34,共5页
Journal of China Hydrology
基金
国务院第一次全国水利普查(GQ510003)
关键词
流域地貌参数
变阈值
多比例尺
不同流域面积标准
geomorphic parameters
different catchment threshold
different scales
standard of different basin areas
