大伙房库区近30年来植被覆盖变化分析

Vegetation Cover Changing Analysis of Dahuofang Reservoir in Recent 30 Years

根据像元二分模型原理,利用1983年、2000年、2011年大伙房库区遥感影像数据提取植被覆盖遥感信息,结合植被指数计算植被覆盖度,分析比较大伙房库区不同时期植被覆盖的变化,研究大伙房库区这三个时期植被覆盖动态变化规律,为大伙房库区的生态建设和可持续发展提供决策支持。结果显示:1近30年以来,大伙房库区植被覆盖等级分布不均衡,高植被覆盖区过分集中在北部地带,西部则多为低植被覆盖区;2大伙房库区高植被覆盖面积在减少、低植被覆盖面积在增加;3大伙房库区植被覆盖总面积在下降,库区的生态环境已经遭到了破坏;4政策建议:加强监测与监管力度,合理开发利用矿产资源,积极响应国家"退耕还林、退耕还草"号召。

According to the pixel two model principle, in order to provide decision support environment for the construction of Dahuofang reservoir and sustainable development, this paper uses the 1983, 2000 and 2011 of Dahuofang reservoir area of remote sensing image data to extract vegetation remote sensing information, calculates the vegetation coverage combined with vegetation index, analyzes and compares the Dahuofang reservoir characteristics of vegetation cover change in different period and dynamic changes of vegetation coverage in these 3 periods of Dahuofang, The results showed that：（1） in recent 30 years, Dahuofang Reservoir vegetation coverage grade distribution are not balanced, high vegetation covered area too concentrated in the northern region, the west is more low vegetation coverage area; （2） the Dahuofang reservoir high vegetation coverage is reducing, low vegetation coverage is increased;（3） Dahuofang Reservoir vegetation coverage area is on the decline, the ecological environment in the area had been damaged; （4） the policy recommendations： to strengthen monitoring and supervision, rational development and utilization of mineral resources, respond to the national＂returning farmland to forest and Grassland＂call actively.