[U-04] Geospatial Applications for Societal Benefits

[U04-01] The state of groundwater level variability in the Arabian Peninsula Region and the associated socio-economic sustainability challenges

*Muhammad Usman¹、Kosuke Heki (1.Life and Environmental Science LES Department, Zayed University, Abu Dhabi, UAE)

キーワード：Satellite Gravimetry, Groundwater, Sustainability, Arabian Peninsula

Groundwater is an important resource for the Arabian Peninsula Region. The population increase, rise in agricultural activities, and GCC countries' inclination towards economic diversification and tourism promotion have heightened the freshwater demand. As a result of climate change and varying weather patterns, the situation has become more complicated. Due to arid conditions, recharge is mostly less than withdrawal which consequently results in underground water level decline with time. In the research, we have used Gravity Recovery and Climate Experiment (GRACE/GRACE-FO) MASCON solutions and Global Precipitation Measurement Mission’s rainfall data to observe the Equivalent Water Thickness (EWT) and rainfall patterns in this region for the past two decades. The results indicate that in Saudi Arabia the water level is declining nearly at a linear rate and the linear regression model fits well with the data (R² value, the coefficient of determination, for different cities of Saudi Arabia is greater than equal to 0.95). Also, in the recent data, one can see the higher seasonal amplitudes that are indicative of greater fluctuations in EWT data in recent times. Furthermore, the UAE cities (Dubai and Al-Ain) and Oman’s Masqat also indicate a declining trend. If water mining continues at the same pace, this important resource can become a rare commodity. Limited water supply can likely become a limiting factor for further social, agricultural, and industrial development. That’s why major reviews and shifts are necessary in the current policies related to water resource management and conservation.