水土保持通报2012，Vol.32Issue(5)：122-127,6.
渭河流域相对湿度与植被覆盖变化及其响应关系
Changes of Relative Humidity and Vegetation Coverage and Their Reciprocal Response in Weihe River Basin
摘要
Abstract
Changes of relative humidity and vegetation coverage in Weihe River basin were studied and the effects of vegetation restoration on air relative humidity were analyzed quantitatively by using GIS,remote sensing technology and statistical methods.It was observed that:(1) The relative humidity had a latitude zonal distribution character,increased from north to south.The overall average relative humidity of Weihe River basin declined gradually and presented an upward trend during the last 10 years.(2) The overall vegetation coverage was improved,while the local vegetation coverage presented a bad trend.Nearly a third of basin was stable.Counties(cities) with an obviously improving trend were mainly located along the main stream as well as in the upper reaches of Jinghe River and Malian River and the middle reaches of Beiluo River.Counties(cities) with a degrading trend were mainly located in the middle and lower reaches of Weihe River and the middle and the upper reaches of Jinghe River.(3) Before the implementation of vegetation restoration,the main influence factors were precipitation,sunshine and temperature.After the implementation of vegetation restoration,the relative humidity increased or decreased with the vegetation cover condition improving or degrading.(4) The NDVI in Wuqi County was negatively correlated with the winter relative humidity and yearly averaged relative humidity.There was a significant positive correlation between the NDVI and the relative humidity in spring and summer.During the period from 1982 to 2006,vegetation condition in summer had the same trend as relative humidity.Vegetation condition was better or worse when relative humidity was high or low.关键词
渭河流域/相对湿度/植被恢复/归一化植被指数（NDVI）Key words
Weihe River basin/relative humidity/vegetation restoration/normalized difference vegetation index(NDVI)分类
农业科技引用本文复制引用
蒋冲,王飞,穆兴民..渭河流域相对湿度与植被覆盖变化及其响应关系[J].水土保持通报,2012,32(5):122-127,6.基金项目
国家自然科学基金项目“基于相同气候条件的人类活动对河流水沙影响定量评价：以黄土高原延河流域为例” （）
中国科学院水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目“北方旱区表层土壤水分遥感监测试验研究” （）
中荷联合主题研究项目“渭河流域水环境问题综合治理对策研究” （）
