scholarly journals Assessing the Impact of Climate Change on Water Supply and Flood Hazard in Ireland Using Statistical Downscaling and Hydrological Modelling Techniques

2006 ◽  
Vol 74 (4) ◽  
pp. 475-491 ◽  
Author(s):  
Rosemary Charlton ◽  
Rowan Fealy ◽  
Sonja Moore ◽  
John Sweeney ◽  
Conor Murphy
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
Statistical Downscaling ◽  
Flood Hazard ◽  
Hydrological Modelling ◽  
Impact Of Climate Change ◽  
Modelling Techniques ◽  
The Impact

Impact of climate change on abstraction for hydropower and public water supply in Wales, UK

2021 ◽  
Author(s):  
Richard Dallison ◽  
Sopan Patil
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
Hydrological Cycle ◽  
Mitigation Measures ◽  
Public Water Supply ◽  
Worst Case ◽  
Efficient Operation ◽  
Substantial Impact ◽  
Impact Of Climate Change ◽  
The Impact

<p>The impact of climate change on the hydrological cycle and catchment processes has been extensively studied. In Wales, such changes are projected to have a substantial impact on hydrological regimes. However, the impact on the water abstraction capability of key sectors in the country, such as hydropower (HP) and public water supply (PWS), is not yet fully understood. We use the Soil and Water Assessment Tool (SWAT) to generate future (2021-2054) daily streamflows under a worst-case scenario of greenhouse gas emissions (Representative Concentration Pathway 8.5) at two large catchments in Wales, the Conwy and Tywi. SWAT streamflow output is used to estimate the abstractable water resources, and therefore changes in the average generation characteristics for 25 run-of-river HP schemes across Conwy and Tywi and the total unmet demand for a single large PWS abstraction in the Tywi. This unmet PWS demand is assessed using the Water Evaluation And Planning (WEAP) system under increasing, static, and declining demand scenarios. Mann-Kendall trend analysis is performed to detect and characterise the trends for both sectors.</p><p>Results show greater seasonality in abstraction potential through the study period, with an overall decrease in annual abstraction volume due to summer and autumn streamflow declines outweighing increases seen in winter and spring. For HP, these trends result in a projected decline in annual power generation potential, despite an increasing number of days per year that maximum permitted abstraction is reached. For PWS, under all future demand scenarios, annually there is an increase in the number of days where demand is not met as well as the total shortfall volume of water. Our results suggest that currently installed HP schemes may not make optimal use of future flows, and that the planning of future schemes should take account of these to ensure the most efficient operation is achieved. Moreover, PWS supply sustainability is under threat and will require management and mitigation measures to be implemented to ensure future supplies. Overall, our study provides a novel perspective on the future water resource availability in Wales, giving context to management planning to ensure future HP generation efficiency and PWS sustainability.</p>

scholarly journals Investigating the impact of climate change on New York City’s primary water supply

2012 ◽  
Vol 116 (3-4) ◽  
pp. 437-456 ◽  
Author(s):  
Adão H. Matonse ◽  
Donald C. Pierson ◽  
Allan Frei ◽  
Mark S. Zion ◽  
Aavudai Anandhi ◽  
...  
Keyword(s):  
Climate Change ◽  
New York ◽  
Water Supply ◽  
Impact Of Climate Change ◽  
Primary Water ◽  
The Impact

scholarly journals The large-scale impact of climate change to Mississippi flood hazard in New Orleans

2013 ◽  
Vol 6 (2) ◽  
pp. 81-87 ◽  
Author(s):  
T. L. A. Driessen ◽  
M. van Ledden
Keyword(s):  
Climate Change ◽  
Sea Level Rise ◽  
New Orleans ◽  
Sea Level ◽  
Mississippi River ◽  
Flood Hazard ◽  
Water Levels ◽  
Impact Of Climate Change ◽  
High Flows ◽  
The Impact

Abstract. The objective of this paper was to describe the impact of climate change on the Mississippi River flood hazard in the New Orleans area. This city has a unique flood risk management challenge, heavily influenced by climate change, since it faces flood hazards from multiple geographical locations (e.g. Lake Pontchartrain and Mississippi River) and multiple sources (hurricane, river, rainfall). Also the low elevation and significant subsidence rate of the Greater New Orleans area poses a high risk and challenges the water management of this urban area. Its vulnerability to flooding became dramatically apparent during Hurricane Katrina in 2005 with huge economic losses and a large number of casualties. A SOBEK Rural 1DFLOW model was set up to simulate the general hydrodynamics. This model included the two important spillways that are operated during high flow conditions. A weighted multi-criteria calibration procedure was performed to calibrate the model for high flows. Validation for floods in 2011 indicated a reasonable performance for high flows and clearly demonstrated the influence of the spillways. 32 different scenarios were defined which included the relatively large sea level rise and the changing discharge regime that is expected due to climate change. The impact of these scenarios on the water levels near New Orleans were analysed by the hydrodynamic model. Results showed that during high flows New Orleans will not be affected by varying discharge regimes, since the presence of the spillways ensures a constant discharge through the city. In contrary, sea level rise is expected to push water levels upwards. The effect of sea level rise will be noticeable even more than 470 km upstream. Climate change impacts necessitate a more frequent use of the spillways and opening strategies that are based on stages.

scholarly journals Flood and Flash Flood Hazard Mapping Using the Frequency Ratio, Multilayer Perceptron and Their Hybrid Ensemble

Proceedings ◽  
2019 ◽  
Vol 48 (1) ◽  
pp. 6
Author(s):  
Mihnea Cristian Popa ◽  
Daniel Constantin Diaconu
Keyword(s):  
Climate Change ◽  
Frequency Ratio ◽  
Flash Flood ◽  
Flood Hazard ◽  
Fuzzy Theory ◽  
Regional Scale ◽  
Hazard Mapping ◽  
Scientific World ◽  
Modelling Techniques ◽  
The Impact

The importance of identifying the areas vulnerable for both floods and flash-floods is an important component of risk management. The assessment of vulnerable areas is a major challenge in the scientific world. Adaptation and mitigation have generally been treated as two separate issues, both in public politics and in practice, in which mitigation is seen as the attenuation of the cause, and studies of adaption look into dealing with the consequences of climate change. Studies on the impact of climate change on flood risk are mostly conducted at the river basin or regional scale. Remote sensing and GIS technologies, together with the latest modelling techniques, can contribute to our ability to predict and manage floods. Various methods are commonly used to map flood sensitivity. Recent methods such as multicriteria evaluation, decision tree analysis (DT), fuzzy theory, weight of samples (WoE), artificial neural networks (ANN), frequency ratio (FR) and logistic regression (LR) approaches have been widely used by many researchers.

Assessing the impact of climate change over the northwest of Iran: an overview of statistical downscaling methods

2020 ◽  
Vol 141 (3-4) ◽  
pp. 1135-1150 ◽  
Author(s):  
Aida Hosseini Baghanam ◽  
Mehdi Eslahi ◽  
Ali Sheikhbabaei ◽  
Arshia Jedary Seifi
Keyword(s):  
Climate Change ◽  
Statistical Downscaling ◽  
Impact Of Climate Change ◽  
Northwest Of Iran ◽  
The Impact

Climate change and reliability of urban water supply

2003 ◽  
Vol 47 (7-8) ◽  
pp. 101-108 ◽  
Author(s):  
S. Maheepala ◽  
C. Perera
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
Assessment Method ◽  
Water Supply Systems ◽  
Climate Change Scenarios ◽  
Urban Water ◽  
Urban Water Supply ◽  
Impact Of Climate Change ◽  
The Impact ◽  
Supply Systems

This paper describes a probability-based method for assessing the potential impact of climate change on urban water supply systems. Specifically, the assessment method uses probability distributions to place a confidence level on the plausible values of response variables. The Benalla water supply system has been used to demonstrate applicability of the proposed assessment method. For the application, the impact of the 2030 climate change scenarios on streamflows and system yield has been examined. The preliminary results have demonstrated that the proposed assessment method can provide valuable insights into the impact of climate change on water supply systems, allowing it to be incorporated into planning decisions.

scholarly journals Impact of Climate Change on Flood Hazard at Airports on Pacific Islands: A Case Study of Faleolo International Airport, Samoa

2021 ◽  
Vol 16 (3) ◽  
pp. 351-362
Author(s):  
Lianhui Wu ◽  
Kenji Taniguchi ◽  
Yoshimitsu Tajima ◽  
◽  
Keyword(s):  
Climate Change ◽  
Sea Level ◽  
Heavy Rainfall ◽  
Flood Hazard ◽  
Drainage System ◽  
Fringing Reef ◽  
Impact Of Climate Change ◽  
International Airport ◽  
The Impact

Climate change is believed to have increased the intensity and frequency of heavy rainfall, and also to have caused sea level rises over this century and beyond. There is widespread concern that small-island nations are particularly vulnerable to increasing risk of inland flood due to such climate change. Understanding the impact of climate change on flood hazard is of great importance for these countries for the development of better protection and adaptation strategies. This study conducted a case study focusing on the impact of climate change on flood hazard at Faleolo International Airport (FIA), Samoa. FIA is a typical small islands airport, located on the lowland along the coast fronted by a fringing reef. Annual maximum daily rainfalls for different return periods were first estimated for the present and future climate around FIA. The estimated rainfalls were input as the forcing of a two-dimensional flood inundation model to investigate the flooding behavior and effectiveness of probable drainage systems. Results showed that a part of the runway can be inundated under heavy rainfall. Construction of drainage pipes significantly contributes to reducing the flood hazard level. Sensitivity analysis showed that the astronomical tide level has relatively little influence on the performance of the drainage system, while the combination of sea level rise and the sea level anomaly induced by stormy waves on the fringing reef could have non-negligible impacts on the drainage system. Location of the drainage pipe is also important to effectively mitigate flooding. The time-concentration of torrential rainfall may also significantly impact the overall performance of the drainage system.

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