Open Access
Global hydrological cycles and world water resources
Taikan Oki
- 10 Oct 2011
- Vol. 80, Iss: 10, pp 862-867
2.3K
TL;DR: Climate change is expected to accelerate water cycles and thereby increase the available RFWR, which would slow down the increase of people living under water stress; however, changes in seasonal patterns and increasing probability of extreme events may offset this effect.
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Abstract: Water is a naturally circulating resource that is constantly recharged. Therefore, even though the stocks of water in natural and artificial reservoirs are helpful to increase the available water resources for human society, the flow of water should be the main focus in water resources assessments. The climate system puts an upper limit on the circulation rate of available renewable freshwater resources (RFWR). Although current global withdrawals are well below the upper limit, more than two billion people live in highly water-stressed areas because of the uneven distribution of RFWR in time and space. Climate change is expected to accelerate water cycles and thereby increase the available RFWR. This would slow down the increase of people living under water stress; however, changes in seasonal patterns and increasing probability of extreme events may offset this effect. Reducing current vulnerability will be the first step to prepare for such anticipated changes.
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References
Global Water Resources: Vulnerability from Climate Change and Population Growth
TL;DR: Numerical experiments combining climate model outputs, water budgets, and socioeconomic information along digitized river networks demonstrate that (i) a large proportion of the world's population is currently experiencing water stress and (ii) rising water demands greatly outweigh greenhouse warming in defining the state of global water systems to 2025.
5.1K
Geology of mankind
TL;DR: It seems appropriate to assign the term ‘Anthropocene’ to the present, in many ways human-dominated, geological epoch, supplementing the Holocene—the warm period of the past 10–12 millennia.
Fragmentation and flow regulation of the world's large river systems
Christer Nilsson,Christer Nilsson,Catherine A. Reidy,Catherine A. Reidy,Mats Dynesius,Mats Dynesius,Carmen Revenga,Carmen Revenga +7 more
TL;DR: A global overview of dam-based impacts on large river systems shows that over half (172 out of 292) are affected by dams, including the eight most biogeographically diverse catchments, which can be used to identify ecological risks associated with further impacts onLarge river systems.
Global pattern of trends in streamflow and water availability in a changing climate
TL;DR: This work shows that an ensemble of 12 climate models exhibits qualitative and statistically significant skill in simulating observed regional patterns of twentieth-century multidecadal changes in streamflow, and projects changes in sustainable water availability by the year 2050.
Human Appropriation of Renewable Fresh Water
TL;DR: In this paper, the authors show that increased use of evapotranspiration will confer minimal benefits globally because most land suitable for rain-fed agriculture is already in production. And they also show that new dam construction could increase accessible runoff by about 10 percent over the next 30 years, whereas population is projected to increase by more than 45 percent during that period.
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