Temporal and spatial variation of water storage in Huang-Huai-Hai area during 2003-2014 based on GRACE satellite data
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Abstract:
We obtained the variation of water storage in Huang-Huai-Hai area from 2003 to 2014 by using the monthly gravity field dat a from GRACE satellite data. Then we compared it with the precipitation data in the same period to analyze its interannual and annual temporal and spatial variation characteristics. The results indicated that: temporally , the water storage in the Huang-Huai-Hai area decreased by 0.42 mm/month in 2003-2014, and that in Haihe and Huaihe river sub-basins decreased by 0.52 mm/ month and 0.28 mm/ month respectively. Within a year, the water storage was in surplus only in February,September and December, reaching the maximum in September to 9.86mm; the maximum water deficit occurred in June at 56.65 mm. Spatially, the water storage decreased from south to north. The water deficit in Haihe river basin was more serious than that in Huaihe river basin. But as the season changes, the water deficit was relieved from south to north, and switched to surplus in winter. The spatial variation of water storage was mainly affected by precipitation, and also affected by regional agricultural layout and crop irrigation. GRACE data can facilitate the study of water storage variation in the Huang-Huai-H ai area and can provide basis for the scientific management and planning of regional water resources.
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