水土保持学报2025，Vol.39Issue(3)：27-33,7.DOI:10.13870/j.cnki.stbcxb.2025.03.032
东北典型黑土区不同级别沟道形态特征分析
Analysis of the Morphological Characteristics of Channels at Different Levels in a Typical Black Soil Region of Northeast China
摘要
Abstract
[Objective]This study aimed to analyze the channel characteristics in a typical small watershed in the black soil region in northeast China,and to explore the methods for distinguishing gullies and stream channels.[Methods]A small watershed(14.59 km²)in the typical black soil region of Bin County,Heilongjiang Province,was selected as the study area.Based on drone imagery and the high-resolution digital elevation model,the Strahler's stream order method was used to classify permanent channels.[Results]The channel density in the watershed was 3.87 km/km²,and the number of channels in the small watershed decreased exponentially as the stream order increased.The proportion of level 1 channels was the highest(64.60%),while the length and area of level 2 channels accounted for the largest proportion,37.62%and 29.57%,respectively.Channels at levels 4 and above had significantly greater width,length,and area than those at lower levels.Channel depth gradually increased from level 4 to level 6.The cross sections of channels at levels 1 to 3 were primarily"V"-shaped or"V"-"U"-shaped.All level 1 to 3 channels were classified as erosion gullies,and level 5 and 6 channels were classified as steam channels,while level 4 channels exhibited characteristics of both.[Conclusion]The Strahler stream order method is applicable for classifying channels in small watersheds of black soil regions.Erosion gullies and stream channels show distinct morphological differences.The findings provide a reference for erosion classification and management.关键词
河网分级/沟道/切沟/河道/黑土区Key words
river network classification/channel/erosion gully/stream channel/black soil region分类
农业科学引用本文复制引用
邢慧淼,张岩,郭海燕,欧俊杉,杨润泽..东北典型黑土区不同级别沟道形态特征分析[J].水土保持学报,2025,39(3):27-33,7.基金项目
国家重点研发计划项目(2024YFD1501200) （2024YFD1501200）
