ISWC OpenIR  > 水保所知识产出(1956---)
近 50 年来王茂沟流域侵蚀沟变化及其影响因素
杨力华1,3; 庞国伟2,4; 杨勤科1,2,4; 裴志林1,3; 王雷2,4
Source Publication水土保持学报

基于 1968 年、 2004 年和 2018 年 3 期高分遥感影像,以王茂沟流域为典型研究区,提取了 3 个时间点
的沟沿线、土地利用、水土保持措施、植被覆盖度和 LS 因子,对近 50 年侵蚀沟时空变化特征及其影响因
素进行了分析。结果表明:( 1 )用遥感方法采集的信息,可基本满足侵蚀沟中长期变化分析;(
2 ) 50 年来王
茂沟流域侵蚀沟一直处于变化中,时间上变化速度逐渐减缓,前期和后期沟头年均前进速率分别为0. 30 ,
0. 27m / a ,沟壁年均扩张速率分别为0.009 , 0.004 m / a ;空间上2个时期年均侵蚀沟变化密度大于 200
m /( km
2 · a )的值分别占比 26.
89% , 7. 07% ,且多分布在流域中下游;( 3 ) 1968 — 2004 年侵蚀沟变化主要受
到土地利用变化和水土保持措施增加的影响, 2005 — 2018 年,侵蚀沟变化主要受到植被覆盖度进一步提高

Other Abstract

The spatiotemporal variations and influencing factors of erosion gully in the last 50years in
Wangmaogou Watershed were studied by extracting some information like shoulder line
, land use , soil and
water conservation measures , vegetation coverage and LS from the three high - resolution remote sensing
images of 1968 , 2004and 2018.The results showed that :( 1 ) The information collected by remote sensing
could basically satisfy
the analysis of medium and long - term change in the erosion gully.

2 )
erosion in
Wangmaogou Watershed was developing all the time , but this change tempered gradually
in the past 50
years.Specifically , the average advance rate of gully head were 0. 30m / a and 0. 27m / a respectively in early
stage and the late stage , and the average expansion rate of gully wall were 0. 009m / a and 0. 004m / a.Spatially ,
the proportion of the variation density of erosion gully above 200 m
/( km
2 · a )
in the two periods were
26. 89%and 7. 07%respectively , which mainly distributed in the middle and lower reaches of the watershed.

3 ) In 1968 — 2004 , the dominant factors affecting the development of erosion gully were land use changes
and increased soil and water conservation measures , while erosion gully changes were mainly affected by the
further improvement of vegetation coverage and land use diversity in 2005 — 2018.The study could help
quantify and analyze the development of erosion gully
and its influencing factors for many years in the
management process , and could also provide an important reference for ecological benefit evaluation of
erosion gully before and after the implementation of “
Grain - for - Green Program ”

Keyword沟沿线 侵蚀沟 黄土高原 土地利用 退耕还林
Indexed By中文核心期刊要目总览
Document Type期刊论文
Recommended Citation
GB/T 7714
杨力华,庞国伟,杨勤科,等. 近 50 年来王茂沟流域侵蚀沟变化及其影响因素[J]. 水土保持学报,2020,34(2):64-70.
APA 杨力华,庞国伟,杨勤科,裴志林,&王雷.(2020).近 50 年来王茂沟流域侵蚀沟变化及其影响因素.水土保持学报,34(2),64-70.
MLA 杨力华,et al."近 50 年来王茂沟流域侵蚀沟变化及其影响因素".水土保持学报 34.2(2020):64-70.
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