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
2020
Source Publication水土保持学报
Volume34Issue:2Pages:64-70
Abstract

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
和土地利用多样性的影响。研究有助于量化分析多年治理过程中侵蚀沟的变化及其影响因素,能对退耕
还林还草工程实施前后侵蚀沟治理的生态效益评价提供重要参考。

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 )
Gully
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
to
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
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/10042
Collection水保所知识产出(1956---)
Affiliation1.中国科学院教育部水土保持与生态环境研究中心
2.西北大学城市与环境学院
3.中国科学院大学
4.旱区生态水文与灾害防治国家林业局重点实验室
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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