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鉴于淮河流域地下水储量变化规律研究对区域生态坏境和经济社会建设等具有重要意义,以淮河流域2002~2009年逐月GRACE时变重力场模型GRC_CSR_RL04数据为例,通过1 000km高斯平滑滤波反演,获得淮河流域陆地水储量的时空变化。同时采用同期GLDAS模型中土壤水和90眼地下水观测井实测地下水埋深数据推算淮河流域地下水储量的时空变化,并用另外31眼观测井数据对结果进行检验。研究反演了淮河流域2003~2009年地下水储量的变化过程,结果表明淮河流域水资源量多年平均增幅为0.13cm/a;地下水储量以约0.28cm/a趋势递增,全流域地下水年增长量约为0.756km3/a。
In view of the great significance of the research on the variation of groundwater reserves in the Huaihe River Basin to the regional ecological environment and economic and social construction, taking the monthly GRACE GRC_CSR_RL04 data of the GRACE time-varying gravimetric model from 2002 to 2009 in the Huaihe River Basin as an example, the 1000km Gaussian smoothing filter inversion , Obtain the temporal and spatial variation of terrestrial water reserves in Huaihe River Basin. At the same time, the temporal and spatial variations of groundwater reserves in Huaihe River Basin were calculated by using the soil water in the GLDAS model and the groundwater depths measured in 90 groundwater observation wells in the same period. The results were verified by 31 additional well observation data. The results show that the average annual increase of water resources in the Huaihe River Basin is 0.13cm / a; the groundwater reserves increase at a rate of about 0.28cm / a; the annual increase of groundwater in the whole basin is about 0.756km3 / a.