摘要
利用 1987年和 2 0 0 0年美国陆地卫星TM数据资料 ,对青海省龙羊峡库区 13年来草地的面积、分布、发展和演变情况进行了调查 ,发现龙羊峡库区天然草地面积 13年中减少了6 984 .0 9hm2 ,平均年递减速率为 0 .14 % ,草地盖度、高度、产量等方面均有不同程度的下降 ,草地盖度平均下降 5 %～ 10 % ,牧草高度下降 3～ 2 8cm 。
Grassland area,distribution,developing and changing of Longyang Xia reservoir region in Qinghai province were investigated by using TM data of 1987 and 2000.The results indicated that the grassland area decreased 6984.09hm 2 in 13 years,annual decreasing rate is 0.14 percent,grass coverage,height,yield and so on have changed in different degree,grass coverage declined 5 to 10 percent,grass height declined 3～28cm,and yield took on a declining tendency.
出处
《中国草地》
CSCD
2003年第1期13-17,共5页
Grassland of China
基金
国家重点科技项目 (攻关 )计划西部大开发科技专项 (2 0 0 0 -K0 1- 0 6 - 0 3)
关键词
青海
龙羊峡库区
草地资源
遥感调查研究
Grassland resource
Remote sensing investigation
Longyang Xia reservoir region
