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REMOTE ESTIMATION OF WATER STORAGE VARIATION OF LAKES IN TIBETAN PLATEAU OVER THE PAST 20 YEARS

机译:近20年来藏高原湖泊储水变化的远程估算

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Changes in water storage of the lakes at the Tibetan Plateau are regarded as one of the most critical indicators of regional hydrological response to climate change. Different to the conventional hydrological approaches, in this study, we investigate the storage change of four lakes basing on a conceptual lake storage model and the most recent (2001-2016) available satellite observation that cover the lakes. The water surface areas and water levels are derived from MODIS and LEGOS altimetry data, respectively. Based on the regression function between water level and lake area, the net water budgets of the four lakes are estimated for the period. The results show that the storage of Ziling Co rose the fastest at the rate of 8.24 billion m~3/a in the past decades, and the rising rate of Qinghai lake has also reached 4.5billion m~3/a. The Ngoring Lake which located in the same region with Qinghai Lake changed fluctuatingly, but the water storage has risen 4.9 billion m~3 from 2001 to 2016. The water storage of Dogaicoring QC increased steadily at the rate of 1.2 billion m~3/a.
机译:西藏高原湖泊储水的变化被认为是对气候变化的区域水文反应最关键的指标之一。不同于传统的水文方法,在这项研究中,我们探讨四个湖基础上的概念湖存储模型和最近(2001年至2016年)提供的卫星覆盖湖泊观测的收纳变化。水面积和水平分别来自MODIS和LEGOS高度数据。基于水位与湖区之间的回归功能,该期间估计了四个湖泊的净水预算。结果表明,Ziling Co的储存在过去几十年中以824亿m〜3 / A的速度最快,青海湖的上升率也达到45亿m〜3 / a。位于与青海湖的同一个地区的Ngoring Lake发生了波动,但储水量从2001年到2016年升起了49亿毫升。独裁化QC的储水量稳定地增加了12亿m〜3 / a的速度。

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