MODELLING THE IMPACT OF CLIMATE CHANGE ON DOMESTIC WATER DEMAND

Bhumibol Dam is the largest dam in the central region of Thailand and it serves as an important water resource. The dam’s operation relies on reservoir operating rules that were developed on the basis of the relationships among rainfall-inflow, water balance, and downstream water demand. However, due to climate change, changing rainfall variability is expected to render the reliability of the rule curves insecure. Therefore, this study investigated the impact of climate change on the reliability of the current reservoir operation rules of Bhumibol Dam. The future scenarios from 2000 to 2099 are based on EC-EARTH under RCP4.5 and RCP8.5 scenarios downscaled by RegCM4. MIKE11 HD was developed for the inflow simulation. The model generates the inflow well (R2=0.70). Generally, the trend of increasing inflow amounts is expected to continue in the dry seasons from 2000-2099, while large fluctuations of inflow are expected to be found in the wet seasons, reflecting high uncertainties. In the case of standard deviations, a larger deviation is predicted under the RCP8.5 scenario. For the reservoir’s operation in a climate change study, standard operating procedures were applied using historical release records to estimate daily reservoir release needed to serve downstream water demand in the future. It can be concluded that there is high risk of current reservoir operating rules towards the operation reliability under RCP4.5 (80% reliability), but the risk is lower under RCP8.5 (87% reliability) due to increased inflow amounts. The unmanageability occurs in the wet season, cautioning the need to redesign the rules.

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The impact of climate change mitigation on water demand for energy and food: An integrated analysis based on the Shared Socioeconomic Pathways

Environmental Science & Policy ◽

10.1016/j.envsci.2016.06.007 ◽

2016 ◽

Vol 64 ◽

pp. 48-58 ◽

Cited By ~ 39

Author(s):

Ioanna Mouratiadou ◽

Anne Biewald ◽

Michaja Pehl ◽

Markus Bonsch ◽

Lavinia Baumstark ◽

...

Keyword(s):

Climate Change ◽

Water Demand ◽

Climate Change Mitigation ◽

Integrated Analysis ◽

Impact Of Climate Change ◽

The Impact ◽

Change Mitigation

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Assessing the impact of climate change on urban water demand and related uncertainties: a case study of Neyshabur, Iran

Theoretical and Applied Climatology ◽

10.1007/s00704-021-03638-5 ◽

2021 ◽

Author(s):

Ahmad Sharafati ◽

Seyed Babak Haji Seyed Asadollah ◽

Armin Shahbazi

Keyword(s):

Climate Change ◽

Water Demand ◽

Urban Water ◽

Impact Of Climate Change ◽

Urban Water Demand ◽

The Impact

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Impact of Rapid Tourism Growth on Water Scarcity in Bali, Indonesia

Indonesian Journal of Limnology ◽

10.51264/inajl.v2i1.14 ◽

2021 ◽

Vol 2 (1) ◽

pp. 1-16

Author(s):

Eva Mia Siska Yamamoto ◽

Takahiro Sayama ◽

Kaoru Takara

Keyword(s):

Water Supply ◽

Water Scarcity ◽

Water Demand ◽

Supply And Demand ◽

Scientific Data ◽

Clean Water ◽

Domestic Water ◽

Domestic Water Demand ◽

Tourism Sector ◽

The Impact

Despite Bali’s dependency on tourism, concerns over the impact of tourism on water scarcity are increasing. The objective of this study is to analyze the clean water demand related to tourism growth and compare them with the available clean water supply. This study suggested that tourism water demand has increased by 20.8 million m3 (295%) from 1988 to 2013. Sixty-eight percent of the increase was concentrated in Badung Regency, where the tourism water demand ratio has increased from 31% to 46%. The study also suggested that rapid population growth has caused an increase in domestic water demand by 48.3 million m3 (48%). This study also shows that the capacity of clean water supply in Bali has increased significantly to meet these demands and the water supply coverage of domestic water demand has increased significantly from 13% in 1988 to 53% in 2013. The water supply coverage of tourism demand varies from year to year with an average of 28% in the study period. The increasing issues over water scarcity despite the improvement in the coverage of domestic water demand suggest further investigations. Yet, despite the large gap between supply and demand in the tourism sector the industry still can have undisrupted clean water throughout the year. This indicates the use of alternative clean water which can be obtained locally such as groundwater. Wise water management through the sharing of scientific data, including in the tourism sector is imperative in solving water scarcity in Bali. Keywords: clean water demand, water scarcity, Badung Regency

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Assessing the hydrologic regime alteration of a Wadi system as a proxy on initial ecological responses to climate change and growing water demand

10.5194/egusphere-egu21-580 ◽

2021 ◽

Author(s):

Nariman Mahmoodi ◽

Jens Kiesel ◽

Paul Wagner ◽

Nicola Fohrer

Keyword(s):

Climate Change ◽

Flow Regime ◽

Water Use ◽

Water Demand ◽

Swat Model ◽

Hydrologic Regime ◽

Impact Of Climate Change ◽

The Future ◽

The Impact ◽

Far Future

<p>Most Wadi systems of the world are threatened by climate change and unsustainable consumption through different water use systems (WUS) which can result in an alteration of the hydrologic regime, a deterioration of water resources, and their valuable ecosystems. The objective of this study is to assess the impact of climate change and growing water demand on the alteration of the Halilrood River&#8217;s flow regime and the associated impacts on the ecosystem of the Jazmorian wetland in central Iran. The Soil and Water Assessment Tool (SWAT) model is used to simulate the flow regime of the near and far future (2030-2059 and 2070-2099). Based on 32 Indicators of Hydrologic Alteration (IHA) in conjunction with the Range of Variability Approach (RVA) alterations in the flow regime are evaluated. Impacts of three scenarios for future water use (No-, Constant-, and Projected-WUS) are assessed. No-WUS assumes pristine conditions in the future when no water use system are included in the model (no demand) and we only account for the impact of climate change; Constant-WUS assumes unaltered groundwater demand in the future; and Projected-WUS corresponds to the increases in the number of water use systems in the future (increasing demand). Flow regime alteration assessment indicates that climate change will severely affect the magnitude of monthly and annual extreme flows, frequency and duration of high and low Pulses in the Halilrood Basin, especially in the far future. The comparison of model simulations under different scenarios shows that the impact of climate change was more intense when growing water demand in the future is taken into account. The result of the RVA test indicates moderate and high level of changes for 18 indicators, thus likely affecting the environmental flows required for the health of the downstream wetland.</p>

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