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联合重力恢复和气候探测任务(gravity recovery and climate experiment,GRACE)确定的陆地水储量变化以及降水测量卫星任务(tropical rainfall measuring mission satellite,TRMM)提供的降水观测数据,探测局部地区发生洪水的可能性,是一种非常有用的遥测方法。本文提出了一种改进的方法来探测阿富汗陆地水储量能力及其发生洪水的可能性。首先,根据GRACE数据确定的陆地水储量变化获取改进的水储量不足,进而估计阿富汗水储量能力;其次,联合TRMM降水数据,建立阿富汗洪水因子模型;最后,将阿富汗洪水因子结果与中国气象局国家气候中心观测图进行对比。结果表明,洪水因子与中国气象局国家气候中心观测结果基本吻合,并从时间和空间角度真实地反应了阿富汗地区发生的洪水。因此,联合GRACE和TRMM卫星观测数据可探测阿富汗发生洪水的可能性,并为研究区域洪水预警提供了新的有利工具。
Precipitation observations from land-based water reserves, as determined by the Gravity Recovery and Climate Experiment (GRACE) mission and the tropical rainfall measuring mission satellite (TRMM), explore the possibility of flooding in localized areas , Is a very useful telemetry method. This paper presents an improved method to detect the capacity of land-based water reserves in Afghanistan and its probability of flooding. First of all, based on the change of terrestrial water reserves determined by GRACE data, we can obtain the improved water reserves, and then estimate the capacity of Afghanistan’s water reserves. Secondly, we combine the TRMM precipitation data to establish the flood factor model in Afghanistan. Finally, compare the results of flood factors in Afghanistan with those of China Meteorological Administration Climate Center observation map for comparison. The results show that the flood factor basically coincides with the observation results of the National Climate Center of China Meteorological Administration and truly reflects the floods in Afghanistan in terms of time and space. Therefore, the joint GRACE and TRMM satellite observations can detect the possibility of flooding in Afghanistan and provide new and advantageous tools for studying regional flood warning.