Climate change impacts on irrigation water resource in Switzerland

Mapping Intimacies ◽

10.5194/egusphere-egu21-14990 ◽

2021 ◽

Author(s):

Zoe Linder ◽

Annelie Holzkämper ◽

Massimiliano Zappa

Keyword(s):

Climate Change ◽

Water Resources ◽

Irrigation Water ◽

Water Scarcity ◽

Agricultural Practices ◽

Climate Change Impacts ◽

Climate Projections ◽

Irrigation Water Demand ◽

Irrigation Potential ◽

Efficient Water Use

According to climate projections, rainfall rates and summer discharge from snow and glacier melt in Switzerland are expected to decrease by the end of the 21st century. This may lead to limited water availability for irrigation in agriculture in the future and high irrigation water demand especially during the summer months, which consequently enhances the problem of water scarcity for agriculture.These predicted changes make the identification of timescales, frequencies, and geographical pattern of water scarcity a fundamental concern for future agricultural practices. Therefore, the main aim of this work is to investigate climate change impacts on water resources and the consequences on irrigation water supply in Switzerland. By creating maps of the geographic distribution of natural water resources available according to climate projections until the end of the 21st century using ArcGIS, the severity of water scarcity is quantified, while regional differences and the most affected areas can be revealed.The expected outcomes are increasing days of water scarcity per year over the course of the 21st century, while those regions furthest away from melt water sources and lakes will be most affected. This in turn might lead to restricted irrigation potential, making more efficient water use indispensable in Switzerland, while creating general shifts to more water-resistant crops in Swiss agricultural practices.

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Simulating Climate Change Impacts on Surface Water Resources Within a Lake‐Affected Region Using Regional Climate Projections

Water Resources Research ◽

10.1029/2018wr024381 ◽

2019 ◽

Vol 55 (1) ◽

pp. 130-155 ◽

Cited By ~ 14

Author(s):

Andre R. Erler ◽

Steven K. Frey ◽

Omar Khader ◽

Marc d'Orgeville ◽

Young‐Jin Park ◽

...

Keyword(s):

Climate Change ◽

Surface Water ◽

Water Resources ◽

Regional Climate ◽

Climate Change Impacts ◽

Climate Projections ◽

Surface Water Resources ◽

Regional Climate Projections

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Modeling the impacts of increase in temperature on irrigation water requirements in Palakkad district: a case study in humid tropical Kerala

Journal of Water and Climate Change ◽

10.2166/wcc.2014.108 ◽

2014 ◽

Vol 5 (3) ◽

pp. 472-485 ◽

Cited By ~ 13

Author(s):

U. Surendran ◽

C. M. Sushanth ◽

George Mammen ◽

E. J. Joseph

Keyword(s):

Climate Change ◽

Water Resources ◽

Irrigation Water ◽

Water Demand ◽

Wide Spectrum ◽

Climate Scenario ◽

Water Requirement ◽

Climate Change Scenarios ◽

Ecological Zones ◽

Irrigation Water Demand

Rise in temperature is one of the predicted impacts of climate change with significant implications on water resources management. An attempt has been made to calculate the water requirement of crops in different agro-ecological zones of Palakkad district in humid tropical Kerala using the CROPWAT 8.0 model. Sensitivity analysis was done for a simulated rise in temperature from 0.5 to 3.0 °C keeping other parameters the same. The analysis showed that the total crop water requirement of all the major crops, like coconut, paddy and banana, increased with rising temperature thereby increasing the simulated irrigation water demand. The gross water demand inclusive of irrigation, domestic and industries will be 1,496 Mm3. The simulated gross water demand for an increase in temperature of 0.5, 1.0, 2.0 and 3.0 °C will be 1,523, 1,791, 1,822 and 1,853 Mm3, respectively. The maximum utilizable water resource available in the district is only 1,579 Mm3 and better water management, focusing particularly on improving the irrigation efficiency, has to be adopted to cater for the demands of the user sectors under changing climate scenario. A wide spectrum of climate change scenarios is also discussed in the paper along with guidelines for the future management of water resources.

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Assessment of the climate change impacts on the water resources of the Luni region, India

Global NEST Journal ◽

10.30955/gnj.001370 ◽

2015 ◽

Vol 17 (1) ◽

pp. 29-40 ◽

Cited By ~ 7

Keyword(s):

Climate Change ◽

Water Resources ◽

Climate Change Impacts ◽

Change Scenario ◽

Climate Projections ◽

Strong Impact ◽

Moisture Deficit ◽

Hydro Climatology ◽

The Impact

<div> Climate change is expected to have a strong impact on water resources at the local, regional and global scales. In this study, the impact of climate change on the hydro-climatology of the Luni region, India, is investigated by comparing statistics of current and projected future fluxes resulting from three representative concentration pathways (RCP2.6, RCP4.5, and RCP8.5). The use of different scenarios allows for the estimation of uncertainty of future impacts. The projections are based on the CORDEX-South Asia framework and are bias-corrected using the DBS method before being entered into the HYPE (HYdrological Predictions for the Environment) hydrological model to generate predictions of runoff, evapotranspiration, soil moisture deficit, and applied irrigation water to soil. Overall, the high uncertainty in the climate projections is propagated in the impact model, and as a result the spatiotemporal distribution of change is subject to the climate change scenario. In general, for all scenarios, results show a -20 to +20% change in the long-term average precipitation and evapotranspiration, whereas more pronounced impacts are expected for runoff (-40 to +40% change). Climate change can also affect other hydro-climatic components, however, at a lower impact. Finally, the flow dynamics in the Luni River are substantially affected in terms of shape and magnitude. </div>

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Assessment of climate change impacts on water resources of the Purus Basin in the southwestern Amazon

Acta Amazonica ◽

10.1590/1809-4392201601993 ◽

2017 ◽

Vol 47 (3) ◽

pp. 213-226 ◽

Cited By ~ 7

Author(s):

Ricardo DALAGNOL ◽

Laura de Simone BORMA ◽

Pedro MATEUS ◽

Daniel Andres RODRIGUEZ

Keyword(s):

Climate Change ◽

Water Resources ◽

21St Century ◽

Forest Cover ◽

Climate Adaptation ◽

Climate Change Impacts ◽

Climate Projections ◽

Natural Ecosystem ◽

Distributed Hydrological Model ◽

Wet Season

ABSTRACT Knowledge about water resources is critical for climate adaptation in face of long-term changes and more frequent extreme events occurrence. During the major droughts of 2005 and 2010, a large epicenter was located in the southwestern Amazon over the Purus River Basin. In this sense, we conducted a hydrological simulation in this basin to assess the climate change impacts on its water resources throughout the 21st century. The water balance was simulated using the Distributed Hydrological Model (MHD-INPE). The future climate projections were simulated by the regional ETA-INPE model driven by a 4-member HadCM3 global model regarding the A1B-AR4/IPCC scenario of greenhouse gases emissions. As simulated by the ETA-INPE/HadCM3, the 4-members mean response for the A1B scenario represents a rainfall reduction of up to 11.1%, a temperature increase of up to 4.4 °C, and a wind speed increase of up to 8.4% in the Purus Basin by the end of 21st century. Under these conditions, the discharge projections represent an overall 27% decrease in the Purus Basin with different patterns between dry and wet season, as well as changes in seasonality trends. The consequences of projected climate change are severe and will probably have a great impact upon natural ecosystem maintenance and human subsistence. In a climate change adaptation process, the preservation of the natural forest cover of the Purus Basin may have great importance in water retention.

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Amplified Impact of Climate Change on Fine-Sediment Delivery to a Subsiding Coast, Humboldt Bay, California

Estuaries and Coasts ◽

10.1007/s12237-021-00938-x ◽

2021 ◽

Author(s):

Jennifer A. Curtis ◽

Lorraine E. Flint ◽

Michelle A. Stern ◽

Jack Lewis ◽

Randy D. Klein

Keyword(s):

Climate Change ◽

Climate Change Impacts ◽

Baseline Period ◽

Climate Impacts ◽

Sediment Supply ◽

Balance Model ◽

Climate Projections ◽

Sediment Delivery ◽

Beneficial Reuse ◽

Coastal Margin

AbstractIn Humboldt Bay, tectonic subsidence exacerbates sea-level rise (SLR). To build surface elevations and to keep pace with SLR, the sediment demand created by subsidence and SLR must be balanced by an adequate sediment supply. This study used an ensemble of plausible future scenarios to predict potential climate change impacts on suspended-sediment discharge (Qss) from fluvial sources. Streamflow was simulated using a deterministic water-balance model, and Qss was computed using statistical sediment-transport models. Changes relative to a baseline period (1981–2010) were used to assess climate impacts. For local basins that discharge directly to the bay, the ensemble means projected increases in Qss of 27% for the mid-century (2040–2069) and 58% for the end-of-century (2070–2099). For the Eel River, a regional sediment source that discharges sediment-laden plumes to the coastal margin, the ensemble means projected increases in Qss of 53% for the mid-century and 99% for the end-of-century. Climate projections of increased precipitation and streamflow produced amplified increases in the regional sediment supply that may partially or wholly mitigate sediment demand caused by the combined effects of subsidence and SLR. This finding has important implications for coastal resiliency. Coastal regions with an increasing sediment supply may be more resilient to SLR. In a broader context, an increasing sediment supply from fluvial sources has global relevance for communities threatened by SLR that are increasingly building resiliency to SLR using sediment-based solutions that include regional sediment management, beneficial reuse strategies, and marsh restoration.

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