Climate Change Effects on the Water Supply in Some Major River Basins

2005 ◽  
pp. 147-172
Author(s):  
Ranjan Muttiah ◽  
Ralph Wurbs
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
River Basins ◽  
Climate Change Effects ◽  
Major River

Historical and projected climate change over three major river basins in China from CMIP5 and CMIP6 models

2021 ◽  
Author(s):  
Xian Zhu ◽  
Zhenming Ji ◽  
Xiaohang Wen ◽  
Shao‐Yi Lee ◽  
Zhigang Wei ◽  
...  
Keyword(s):  
Climate Change ◽  
River Basins ◽  
Major River

scholarly journals Potential impacts of stratospheric aerosol injection on drought risk managements over major river basins in Africa

2021 ◽  
Vol 169 (3-4) ◽  
Author(s):  
Babatunde J. Abiodun ◽  
Romaric C. Odoulami ◽  
Windmanagda Sawadogo ◽  
Olumuyiwa A. Oloniyo ◽  
Abayomi A. Abatan ◽  
...  
Keyword(s):  
Climate Change ◽  
River Basins ◽  
Stratospheric Aerosol ◽  
Drought Risk ◽  
Drought Management ◽  
Drought Frequency ◽  
Evaporative Demand ◽  
Major River ◽  
Stratospheric Aerosol Injection ◽  
Impacts Of Climate Change

AbstractMost socio-economic activities in Africa depend on the continent’s river basins, but effectively managing drought risks over the basins in response to climate change remains a big challenge. While studies have shown that the stratospheric aerosol injection (SAI) intervention could mitigate temperature-related climate change impacts over Africa, there is a dearth of information on how the SAI intervention could influence drought characteristics and drought risk managements over the river basins. The present study thus examines the potential impacts of climate change and the SAI intervention on droughts and drought management over the major river basins in Africa. Multi-ensemble climate simulation datasets from the Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) Project were analysed for the study. The Standardized Precipitation Evapotranspiration Index (SPEI) and the Standardized Precipitation Index (SPI) were used to characterize the upper and lower limits of future drought severity, respectively, over the basins. The SPEI is a function of rainfall and potential evapotranspiration, whereas the SPI is only a function of rainfall, so the difference between the two indices is influenced by atmospheric evaporative demand. The results of the study show that, while the SAI intervention, as simulated in GLENS, may offset the impacts of climate change on temperature and atmospheric evaporative demand, the level of SAI that compensates for temperature change would overcompensate for the impacts on precipitation and therefore impose a climate water balance deficit in the tropics. SAI would narrow the gaps between SPEI and SPI projections over the basins by reducing SPEI drought frequency through reduced temperature and atmospheric evaporative demand while increasing SPI drought frequency through reduced rainfall. The narrowing of this gap lowers the level of uncertainty regarding future changes in drought frequency, but nonetheless has implications for future drought management in the basins, because while SAI lowers the upper limit of the future drought stress, it also raises the lower limit of the drought stress.

Climate change decisive for Asia’s snow meltwater supply

2020 ◽  
Author(s):  
Philip Kraaijenbrink ◽  
Emmy Stigter ◽  
Tandong Yao ◽  
Walter Immerzeel
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
Large Scale ◽  
Snow Water Equivalent ◽  
River Basins ◽  
Large River ◽  
Future Climate Change ◽  
Seasonal Snow ◽  
Temperature And Precipitation ◽  
Snow Model

<p>Meltwater from seasonal snow provides a substantial amount of runoff to many of the rivers that originate in the high mountains of Asia, yet the importance of snow in the region as streamflow component, its changes over the past decades, and its sensitivity to future climatic changes are relatively unknown. To understand future changes in the water supply to the millions of people living downstream, a better understanding of snow dynamics at large scale is key. Using a novel snow model, forced by ERA5 climate reanalysis and calibrated by MODIS remote sensing observations, we generate daily snow water equivalent output at 0.05° resolution covering all major river basins in Asia. We show that between 1979 and 2018 significant and spatially variable changes have occurred in snow meltwater availability and its timing, with melt peaks attenuating and/or advancing in time, and snowmelt seasons shortening. Additionally, our results reveal that snowmelt is a much more important contributor to streamflow than glacier melt in many of Asia's large river basins. In a bottom-up elasticity analysis we project strong changes in snowmelt in the future under changing temperature and precipitation. Sensitivity of snowmelt to climate change varies among basins, however, and actual losses are strongly dependent on the degree of future climate change. Limiting climate change in the current century is therefore crucial in order to sustain the role of seasonal snow packs in Asia’s water supply.</p>

Climate change effects on the hydrological regime of small non-perennial river basins

2016 ◽  
Vol 542 ◽  
pp. 76-92 ◽  
Author(s):  
Dario Pumo ◽  
Domenico Caracciolo ◽  
Francesco Viola ◽  
Leonardo V. Noto
Keyword(s):  
Climate Change ◽  
Hydrological Regime ◽  
River Basins ◽  
Climate Change Effects
Sign in / Sign up

Export Citation Format

Share Document