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湖泊水位的变化对区域气候变化响应敏感,可客观反映该地区水资源的时空变化,青藏高原的大部分湖泊缺乏实测水位资料,测高卫星的广泛应用为无资料区水位变化监测提供了一种新的有效技术手段。论文以扎日南木错为研究对象,利用多源卫星测高数据,获取该湖泊1992—2012年的水位序列,分析其20 a来水位的动态变化特征,并与其他数据源获取的水位序列对比。研究表明,1992—2012年,扎日南木错水位上涨了0.786 m,1999年前,水位以0.132 m/a速度下降,1999—2012年水位以0.144 m/a速度上升,总体呈现先下降后上升的趋势,与其他数据源获取的水位序列呈现的变化规律一致,且尤其是2000年后,扎日南木错春冬水位比夏秋水位变化幅度更剧烈。
The change of lake water level is sensitive to the regional climate change, which objectively reflects the spatio-temporal variation of water resources in the area. Most of the lakes in the Qinghai-Tibet Plateau lack the measured water level data. The wide application of altimetry satellites provides a New and effective technical means. In this paper, we took Namim fault in Tarim River as the research object, obtained the water level sequence of the lake from 1992 to 2012 by using multi-source satellite altimetry data, analyzed the dynamic change characteristics of the water level in the past 20 years and compared with the water level sequence obtained by other data sources Compared. The research shows that in 1992-2012, the water level of Namjak in Za Ri increased by 0.786 m, before 1999, the water level decreased by 0.132 m / a, and the water level increased by 0.144 m / a from 1999 to 2012, showing an overall decline The trend of rising is consistent with that of other data sources. Especially after 2000, the water level of spring and winter in Zajim Nam Co deviate more than that of summer and autumn.