因此，水利學者現在可以將GRACE 的資訊運用於影響區域水域管理的方法。「GRACE 資訊增加了我們對水循環的了解，以及土壤濕度的模擬狀態、雪和地下水的電腦模組等，」位於馬里蘭州太空總署古達（Goddard）太空飛行中心的水利專家羅岱爾（Matt Rodell）表示。「這是對全世界的天氣、河流、洪水、乾旱、水資源狀況的預測有更好掌控重要的一步。」
Recent space observations of freshwater storage by a pair of satellites are providing a new picture of how Earth's water resources are distributed globally and how water levels and distribution patterns are changing in more than 50 river basins that cover most of Earth's land area. The variations reflect changes in water stored in rivers, lakes, reservoirs; in flood plains as snow and ice; and underground in soils and aquifers.
"GRACE（Gravity Recovery and Climate Experiment） is providing a first ever look at the distribution of freshwater storage on the continents," said Jay Famiglietti, professor of Earth System Science, University of California, Irvine. "With longer time series, we can distinguish long-term trends from natural seasonal variations and track how water availability responds to natural climate variations and climate change."
Hydrologists are analyzing GRACE data to identify trends in precipitation changes, groundwater depletion and snow and glacier melt rates, and to understand their underlying causes.
African river basins, such as the Congo, Zambezi and Nile, have been drying over the past five years. At the same time in the United States, the Mississippi and Colorado River basins show water storage increases. This type of data can be used to make more informed regional water management decisions.
GRACE also is allowing scientists to estimate another key component of the water cycle for the first time - water discharged by freshwater streams from Earth's continents. Stream flow measurements are often not shared among nations for economic, political or national defense reasons. GRACE measurements of the total water discharged by continental streams are important for monitoring the availability of freshwater and understanding how surface water runoff from continents contributes to rises in global sea level.
As a result, hydrologists can now apply GRACE data in ways that will impact regional water management. "GRACE data improve our understanding of the water cycle and simulations of soil moisture, snow and groundwater in computer models," said Matt Rodell, a hydrologist at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "This is a key step toward better weather, stream flow, flood, drought and water resource forecasts worldwide."