Bulletin of Surveying and Mapping ›› 2022, Vol. 0 ›› Issue (3): 121-126.doi: 10.13474/j.cnki.11-2246.2022.0089

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Groundwater storage data inversion and spatiotemporal evolution analysis in Henan province using GRACE and GLDAS data

LI Mingyu1,2, CHEN Lijun3, LIU Guoxiang2,4, MAO Wenfei2, XIANG Wei2, CAI Jialun2, ZHANG Bo2, ZHANG Rui2,4   

  1. 1. Henan College of Surveying and Mapping, Zhengzhou 451464, China;
    2. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;
    3. National Geomatics Center of China, Beijing 100830, China;
    4. State-Province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety, Chengdu 611756, China
  • Received:2021-04-01 Online:2022-03-25 Published:2022-04-01

Abstract: Traditional monitoring methods are difficult to acquire groundwater storage observation in large-scale and long-term.Thus,the groundwater storage data inversion has become a hot topic based on the GRACE gravity satellite.This paper uses the GRACE RL06 monthly data released by CSR during the period of 2012 to 2016 to produce terrestrial water storage changes.Later,subtract surface water storages changes calculated by the GLDAS hydrological model over the same period.Finally,the time series results of groundwater storage changes in Henan province are obtained.Considering the verification between the produced results and the measured groundwater level data,the calculated correlation coefficients are all at the significance level of 0.01,which indicates that the groundwater storage change monitoring method in this paper is highly reliable.From the least squares linear fitting change rate results,it can be seen that the main loss area of groundwater in the province is the northern region with the maximum rate exceeding 26 mm/a,and the main surplus area is located in the central and eastern regions with the maximum rate exceeding 16 mm/a.These mentioned results are basically consistent with existed researches as well as the main groundwater overexploitation areas announced by the Henan provincial Water Resources Bureau.The research results in this paper are aimed at using GRACE gravity satellite data and GLDAS hydrological model to obtain the spatial distribution difference and evolution trend of groundwater storage changes in Henan province.While providing data support for the rational use and protection of groundwater resources,it also offers reference for the protection and reasonable use of groundwater resources in the area.

Key words: GRACE;GLDAS;groundwater storage;data inversion;Henan province

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