Global Hydrological Cycles and World Water Resources

  title={Global Hydrological Cycles and World Water Resources},
  author={Taikan Oki and Shinjiro Kanae},
  pages={1068 - 1072}
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… 

Current Situation and Future Perspectives on Global Hydrologic Cycles, Water Balances, and World Freshwater Resources

Water is a naturally circulating resource that is constantly recharged. Therefore, even though stocks of water in natural and artificial reservoirs help increase water resources available to human


A global water resources model was developed to assess the impact of climate change on water resources. The model consists of six modules, namely, land surface, river, agriculture, reservoir

Human–water interface in hydrological modelling : current status and future directions

Over recent decades, the global population has been rapidly increasing and human activities have altered terrestrial water fluxes to an unprecedented extent. The phenomenal growth of the human

World Water Resources at Stake

  • T. Oki
  • Environmental Science
    Human Geoscience
  • 2019
Overviews on the basic human needs on water and world water withdrawals are introduced, and the reason why we should concern on the availability is explained by its uneven distribution seasonally and

State of future water regimes in the world’s river basins: balancing the water between society and nature

  • G. Kattel
  • Environmental Science
    Critical Reviews in Environmental Science and Technology
  • 2019
Abstract Global freshwater resources have faced critical water security challenges during the 21st century in the world’s river basins. Shortages of water have impaired economic development by

Modelling global water stress of the recent past: on the relative importance of trends in water demand and climate variability

Abstract. During the past decades, human water use has more than doubled, yet available freshwater resources are finite. As a result, water scarcity has been prevalent in various regions of the

What about reservoirs? Questioning anthropogenic and climatic interferences on water availability

Water resources in semi‐arid regions like the Mediterranean Basin are highly vulnerable because of the high variability of weather systems. Additionally, climate change is altering the timing and

Rainfall-Runoff Modelling for Sustainable Water Resources Management: SWAT Model Review in Australia

Water is considered as a vital resource for survival, development and ecological needs. In a world of increasing water demand, planning for a sustainable system satisfying the demands of present and

Global perspective on hydrology, water balance, and water resources management in arid basins

Arid and semiarid regions comprise a large part of the world's terrestrial area and are home to hundreds of millions of people. Water resources in arid regions are rare and critical to society and to



Global water resources: vulnerability from climate change and population growth.

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.

Global pattern of trends in streamflow and water availability in a changing climate

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.

Global Freshwater Resources: Soft-Path Solutions for the 21st Century

A transition is under way to a “soft path” that complements centralized physical infrastructure with lower cost community-scale systems, decentralized and open decision-making, water markets and equitable pricing, application of efficient technology, and environmental protection.

Balancing Water for Humans and Nature: The New Approach in Ecohydrology

Part I: Water Functions in the Life-support System * Water: The Bloodstream of the Biosphere * Water Availability: Expanding the Perspective * Human Water Requirements * Incorporating Water for

Fragmentation and Flow Regulation of the World's Large River Systems

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.

A water resources threshold and its implications for food security.

A water resources threshold with respect to cereal import is estimated on the basis of data for countries in Asia and Africa to see if many poor and populous countries dropping below the threshold in association with their rapid population growth and the depletion of fossil groundwater.

Hydrology 2020: An Integrating Science to Meet World Water Challenges

A group of 12 younger hydrologists, with experience across the full spectrum of hydrology, was commissioned by the International Association of Hydrological Sciences (IAHS) in 2001 to look to the

Detection of a direct carbon dioxide effect in continental river runoff records

A mechanistic land-surface model and optimal fingerprinting statistical techniques are used to attribute observational runoff changes into contributions due to climate change and variability, and find that the trends are consistent with a suppression of plant transpiration due to CO2-induced stomatal closure.