江河源区生态环境类型TM影像解译标志的建立

江河源区是近年来西部生态环境研究的重要地区之一 ,也是我国两大河流上游的水源涵养区。基于 RS和 GIS对该地区两个不同时期 (1986和 2 0 0 0年 )生态环境进行对比分析。采用 TM影像在同一个分类系统下进行信息提取。分类系统共分 8类 34个类型 ,原则是根据地域特点来划分的 ,主要有 :(1)地域差异原则 ;(2 )分区与分类相结合的原则 ;(3)综合因素与主导因子结合的原则。通过建立操作性较强的影像解译标志 ,利于今后对江河源区生态环境进一步研究和和监测

Establishing Interpretation Marks of TM Image for Environmental Type of the Source Area of Yangtze River and Yellow River

Recently, the source area of the Yangtze river and the Yellow river is one of the important areas being researched on environment in the west China, as well as the water conservation on upper reaches of the two rivers. Researching environment must take them into account, because the directly affects the improvement of environment, such as landform, soil, temperature, moisture and erosion etc. Contrasting to the former that took much account on the land use/land cover in the area, the study contrast state by means of remote sensing, utilizing TM images to extract information through the same classification system. The system is divided into eight classes and thirty four types. According to characteristics of the region, the system contains:(1) area diversity principle; (2) combination principle between regionalization and class classification; (3) combination principle between synthetically and dominant factors. It is necessary to establish superior manipulative ability of interpretation marks on the studied area, and beneficial to make further monitor and research.