Abstract
Abstract. Water storage in regions with the weather hot and arid or semi-arid such as Iran have many uses. Including these water storage, can be referred to groundwater. Groundwater is one of the sources of sweet waters in the world, and one of the factors is economical and social development. Hence, monitoring its changes in water resources management is of great importance. On the other hand, precipitation is one of the factors directly affecting the water storage level and groundwater level changes. In this study, water storage changes with GRACE satellite data and total annual precipitation with CHIRPS data in the Google Earth Engine system investigated for Iran during 2003–2017. The results obtained from the GRACE satellite data indicate over 10 cm reducing of the water storage levels in Iran during the period between 2008 to 2017. Also, the chart obtained from the CHIRPS data for the total annual precipitation shows that the amount of rainfall since 2008 has decreased in this region.
Highlights
Accurate monitoring and appropriate water storage changes in spatial and temporal dimensions for water resources management in countries with the weather arid and semi-arid such as Iran would be useful (Joodaki, 2014)
3.1 Results of water storage changes with GRACE data The monthly water level changes calculated with the following relation: (1)
The average water storage level changes for Iran using data produced by CSR, GFZ, and JPL institutions after processing with the Google Earth Engine online system are as following: In this study, using the of CHIRPS data, the total annual precipitation was calculated for Iran during 2003-2017
Summary
Accurate monitoring and appropriate water storage changes in spatial and temporal dimensions for water resources management in countries with the weather arid and semi-arid such as Iran would be useful (Joodaki, 2014). A part of the surface water and rainfalls enter the underneath layers of the earth (Wahr et al, 2004a) In this way, the parameter that directly affects water storage, and the groundwater level changes are precipitation. The country of Iran selected and using the Google Earth Engine online system, the water storage changes by GRACE satellite data and annual precipitation in the region reviewed with CHIRPS data.
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