摘要
由于青海湖地区的生态环境较为脆弱,且人类活动进一步加剧,人口、资源与环境的矛盾日渐突出,因此,近年来,青海湖及其周边地区的生态环境出现了明显变化,主要表现在水位下降及水域面积减小、草原退化、沙质荒漠化土地面积扩大等。文章采用1975年MSS卫星图像及1987、2000年TM卫星图像作为遥感信息源,并结合地理信息系统方法,旨在查明青海湖地区耕地、沙质荒漠化土地和水域等生态环境要素的时空演化规律,为青海湖地区实现资源开发与环境协调发展提供科学依据。监测结果表明,25a来,青海湖地区的耕地及沙质荒漠化土地面积出现明显的扩大,而水域面积出现明显缩小,同时由于湖周各河流土壤侵蚀的加剧,在部分河流入湖处泥沙淤积较为严重,生态环境出现明显恶化。
Using MSS satellite image data in 1975 and TM image data in 1987 and 2000 as remote sensing information source, combined with GIS analysis method, we study on the dynamic change rule of ecological environment factors as plantation, sandy desertification land and water area of Qinghai Lake area to provide scientific guidance for the continuable development of resource and environment in Qinghai Lake area. The result is that, in the last 25 years, the acreages of plantation and sandy desertification land increased clearly but water area acreage decreased. At the same time, for the aggravation of soil erosion of rivers around the lake, sand in the bayou of certain rivers filled up more seriously, and the ecological environment got into worsened distinctly.
出处
《中国地质灾害与防治学报》
CSCD
2005年第3期100-103,共4页
The Chinese Journal of Geological Hazard and Control
基金
科技部重大基础研究前期研究专项<干旱
半干旱地区的环境动力机制重大理论基础研究>资助项目(2003CCC01500)
关键词
青海湖
耕地
沙质荒漠化土地
水域
遥感
动态变化
Qinghai Lake
plantation
sandy desertification land
water body
remote sensing
dynamic change
