The water resources quantity of the second assessment is less than that of the first assessment due to the comprehensive influence of climate and human activity.

与第一次评价相比，第二次评价水资源量有所减少，这是气候与人类活动综合作用的结果。

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This volume contains case studies from diverse aquifer systems, scientific methods, and climatic settings that have been conducted globally under the framework of the UNESCO-IHP project Groundwater Resources Assessment under the Pressures of Humanity and Climate Change ( GRAPHIC).

UNESCO: Climate Change Effects on Groundwater Resources: A Global Synthesis of Findings and Recommendations | United Nations Educational, Scientific and Cultural Organization