摘要
基于GF-1遥感卫星影像,利用植被覆盖度估算模型,定量研究了民勤绿洲2013—2015年植被覆盖时空变化的规律。结果表明:3年中民勤绿洲的植被覆盖度总体保持稳定,其中极低覆盖度植被(Ⅰ类)从2013年的76.9%增加到了2015年的83.9%,低覆盖度植被(Ⅱ类)和高覆盖度植被(Ⅳ类)则分别相对减少了6.8%和1.9%,中覆盖度植被(Ⅲ类)则增加了1.7%;在植被覆盖度总体稳定前提下,也有少数野生黑枸杞等名贵药材生长区由于受到人类活动的严重影响,植被覆盖度明显下降。
In this paper, the typical Minqin oasis were taken as research area. Based on GF-1 images as data sources, and using vegetation coverage estimation model, the vegetation coverage from 2013 to 2015 were estimated and classified, the spatio-temporal variation rules of different vegetation coverage were quantitative studied. Analysis showed that the vegetation coverage of Minqin Oasis remained stable during the 3 study years and that of the extremely low covered vegetation, called Class I, increased from 76.9% in 2013 to 83.9% in 2015. Low covered vegetation that called Class II and high covered vegetation that was defined as Class IV was respectively reduced by 6.8% and 1.9%. The intermediate covered vegetation, named Class III increased by 1.7%. In a whole, under the premise of the overall stability of vegetation coverage, due to the serious impact of human activities, a few parts of wild black Chinese wolfberry and other rare medicinal herbs growing areas′ vegetation coverage were decreased significantly.
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2017年第2期163-170,共8页
Journal of Southwest Forestry University：Natural Sciences
基金
国家重点基础研究发展计划(973计划)项目(2013CB733400)资助
西安科技大学博士启动基金项目(2014QDJ050)资助
作者简介
张兆鹏（1991-）,男,硕士生.研究方向：遥感图像处理.Email： 1848640771@qq.com.
李增元（1959-）,男,博士,研究员,数字林业研究方向首席专家,博士生导师.研究方向：环境遥感、信息共享、数字林业等.Email： zengyuan.li@caf.ac.cn.
