北京师范大学学报（自然科学版）2016，Vol.52Issue(4)：458-465,8.DOI:10.16360/j.cnki.jbnuns.2016.04.010
黄河十大孔兑流域林草植被覆盖度的遥感估算及其动态研究∗
Study on shrubs-herbs-arbor vegetation coverage and dynamic changes in the ten tributaries of Yellow River in Inner Mongolia by remote sensing method
摘要
Abstract
A series of water and soil conservation measures and river regulation proj ects were vigorously promoted and implemented in the ten tributaries of Yellow River in Inner Mongolia in recent decades.These include returning farmland to forest and grass,planting trees and grass,which led to significant changes in vegetation cover of underlying surface. Dimidiate pixel model based on NDVI was adopted to calculate vegetation coverage in 1980,1998,2010 and 2014 using multi-source remote sensing data,spatial and temporal variations of shrubs-herbs-arbor vegetation coverage were analyzed.It has been found that from 1980 2014, the shrubs-herbs-arbor vegetation coverage in the ten tributaries showed a consistent growth trend from 9.29%in 1980 to 37.80% in 2014.The increase rate of shrubs-herbs-arbor vegetation coverage was significantly faster in the whole basin after 1998.The main feature of coverage restoration was that the area ratio of medium vegetation coverage increased.In the past 35 years,complete recovery type and stable type were the main vegetation change types.The three vegetation changing types that contain complete recovery,recovery and slight recovery types have accounted for 73.09% in the whole basin.Total areas of serious degradation, degradation and slight degradation types accounted for 2.72%.From 1980 2014,the shrubs-herbs-arbor vegetation coverage in all typical geographical units in the ten tributaries showed an increasing trend.The increasing rate of shrubs-herbs-arbor vegetation coverage was significantly faster,with exception of coverage downstream after 1998. In 1980, order of shrubs-herbs-arbor vegetation coverage in different typical geographical units of the ten tributaries was:western upstream> eastern upstream> downstream> eastern midstream> western midstream.From 1998 2014,the order changed to:eastern midstream> eastern upstream> western upstream> western midstream> downstream.Returning farmland to forest and grass was the main reason to increase vegetation coverage of the ten tributaries after 1998.关键词
林草植被覆盖度/像元二分模型/动态变化/十大孔兑Key words
shrubs-herbs-arbor vegetation coverage/dimidiate pixel model/dynamic change/the ten tributaries分类
资源环境引用本文复制引用
管亚兵,杨胜天,周旭,刘晓林,陈珂,王志伟..黄河十大孔兑流域林草植被覆盖度的遥感估算及其动态研究∗[J].北京师范大学学报（自然科学版）,2016,52(4):458-465,8.基金项目
国家“十二五”科技支撑计划资助项目(2012BAB02B00) （2012BAB02B00）
国家自然科学基金资助项目(41271414) （41271414）
中央高校基本科研业务费专项资助项目 （）
