Abstract
This paper presents an overview of water resources issues in the context of world population growth, climate change, and variability, and provides examples of how these issues affect local and regional water policy concerns. Also discussed is the associated research of the international scientific community in regard to physically-based modeling of the hydrological cycle, with special focus on the Global Energy and Water cycle EXperiment (GEWEX) Programme. The critical role of precipitation measurements for climate model accuracy is emphasized, with a review of several satellite methods and strategies for improving precipitation measurements. Finally, the impact of semiarid regions on global hydrologic issues is underscored with a review of research conducted by SAHRA, the National Science Foundation Science and Technology Center dedicated to Sustainability of semi-Arid Hydrology and Riparian Areas.
Highlights
Water Policy ArticleRegional and global hydrology and water resources issues: The role of international and national programs
When one reviews a few basic facts about the Earth’s water resources, it becomes evident that water quality and quantity will present daunting challenges for scientists and water policy experts in the 21st Century
The two primary sources of fresh water used for human consumption are groundwater and surface water, yet the amount of fresh water on Earth is very limited
Summary
Regional and global hydrology and water resources issues: The role of international and national programs.
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