内蒙古达里诺尔湖泊湿地动态的遥感监测

利用极轨气象卫星NOAA/AVHRR遥感监测资料,结合实地考察数据,绘制遥感影像图及植被指数图,统计了2000年至2005年,每年4月到9月达里诺尔湖的水域面积,分析了达里诺尔湖泊水体的年际变化,并结合1961年至2004年45年的气象数据,得出以下主要结论:(1)由于气候及人为因素,从2000年起至2003年达里诺尔湖泊的水域面积处于稳定波动状态,而2003年8月后湖泊面积减少,呈下降趋势。(2)在人为因素对环境的作用保持在1个较低水平时,研究区湖面变化与温度和降水的变化有较好的吻合关系,年均气温与湖面积之间存在负相关关系,降水量与湖泊面积之间基本呈正相关关系。(3)该地区气候的变化对湖区生态变化起着重要的作用,人类影响相对较弱,认为温度和降水是影响研究区湖泊面积和水位的主导因素。

THE DYNAMIC CHARACTERISTICS OF DALINUOER WETLAND IN INNER MONGOLIA BASED ON REMOTE SENSING

Remote sensing image and vegetation index map were made by using the synthetic data of NOAA-AVHRR,combined observational and invested data of Dalinuoer Wetland in Inner Mongolia.And lake area interannual variability was analyzed by statisticing Dalinuoer lake area in annual April to September from 2000 to 2005.After analyzing whether data from 1961 to 2004,the main results showed that:(1)Dalinuoer lake area was fluctuated stably from 2000 to 2003,and lake area was decreased a little from August 2003.Swamp wetland area around the lake was fluctuated largely,and increased obviously with the lake area decreased.(2)When the environmental function of the artificial factor is at a lower level, the lake area variety and was identical with variation of temperature and precipitation,there was negative relationship between annual average temperature and Lake area,there was positive relationship betweeen precipitation and Lake area.(3) The climatic variety play an important role in ecological charge,the temperature and precipitation was regarded as predominant factor that influence lake area and water level.