检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
出 处:《四川林业科技》2009年第4期82-85,共4页Journal of Sichuan Forestry Science and Technology
摘 要:按照干旱河谷划分的技术标准,采用遥感技术结合地面调查的方法,调查界定了四川干旱河谷的分布与面积。四川干旱河谷分布于川西地区,涉及金沙江、雅砻江、安宁河、大渡河、岷江、白龙江的干流及部分支流,涵盖攀枝花市、凉山州、甘孜州、阿坝州、雅安市的40个县(市、区),面积达950 885.3 hm2。In accordance with the technical standards of the division of arid valleys, using methods of remote sensing technology combined with ground survey, the investigation work was done to the area and distribution of the arid valley in Sichuan Province. The arid valley in Sichuan Province was located in western Sichuan region,including the main streams and some tributaries of the Jinsha River, the Yalong River, the Anning River, the Dadu River,the Minjiang River and the Bailong River, covering of about 40 counties ( cities, districts) of Panzhihua, Liangshan, Ganzi, Aba, Ya'an, etc. cities (prefectures) totaling an area of 950 885.3 hm^2.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.117