青海可可西里主要湖泊湖底地貌研究

Study on Sublacustrine Morphology of Main Lakes in Hoh Xil Region

中文关键词:  可可西里  湖泊  遥感  湖底地貌

英文关键词:Hoh Xil  Lake  Remote sensing  Lake bottom topograph

中文摘要:

      应用阅值法对青海可可西里地区主要湖泊的遥感影像进行水体信息提取，根据水体与其它地物在ETM＋的5波段具有很好的区分效果，经反复尝试在该波段找到了适合各个湖泊的分离阈值。通过目视解读，并与相关地形图对比检验，湖泊水体可较为准确提取出。利用ENVI软件得到包含湖底信息的合成图像，选择其中信息丰富的假彩色合成图像进行解译，根据其色调并结合近岸地形信息初步判断出了湖底的地形地势，并在永红湖底发现了一个特殊的环状构造。

英文摘要:

      The threshold method was used to extract the information of lake water bodies in Hoh Xil region.Lake water bodies can be distinguished perfectly from other landforms in ETM+ 5 band,so the messages of main lakes in Hoh Xil region were extracted by remote sensing image and appropriate threshold values determined by threshold method.By visual interpretation and the comparison with topographic map,the lake water infermation was exactly gained.And by ENVI software image compounding,the pseudcolor images in combi...