人民黄河2018，Vol.40Issue(5)：103-106,4.DOI:10.3969/j.issn.1000-1379.2018.05.022
近40 a河龙间西北片林草植被变化及其驱动力
Vegetation Change and its Driving Forces in the Northwest Area from Hekouzhen to Longmen of the Yellow River Basin in the Last 40 Years
摘要
Abstract
The sediment yield from the Northwest part of Hekouzhen-Longmen region in the Yellow River basin has decreased by about 94%since 1999,so it is of important significant to analyze the vegetation variation and its driving forces which would be helpful to understand the causes of sediment decrease. Based on the remote sensing survey data,this paper analyzed the degree of vegetation variation and its changing process of the area from 1978 to 2017 and the driving forces of the vegetation variation during this period. The research shows that the vegeta-tion had been continuously improving in the past 40 years and the period from 1998 to 2017 contributed nearly 80%. In 2016,the vegetation coverage of grass forest land in the study area reached 59.7% and the percentage of effective vegetation in the area reached 48.8%,which are three times of them in 1978. Before 2000,human destruction on the grass-forest vegetation was the decisive factor to the area's vegetation status. But after 2000,human destruction was slight and the rainfall degree has become the key factor to affect the vegetation status.关键词
植被/变化/驱动力/河龙区间/黄土高原Key words
vegetation/variation/driving force/Hekouzhen-Longmen region/Loess Plateau分类
农业科技引用本文复制引用
马思远,刘晓燕,董国涛,高云飞..近40 a河龙间西北片林草植被变化及其驱动力[J].人民黄河,2018,40(5):103-106,4.基金项目
国家重点研发计划项目(2016YFC0402403) （2016YFC0402403）
国家自然科学基金资助项目(51779099) （51779099）
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2017-10). （HKY-JBYW-2017-10）
