PROPOSAL OF CRITERIA TO EVALUATE CLIMATE CHANGE AND RESERVOIR SEDIMENTATION IMPACTS ON FLOOD CONTROL AND WATER UTILIZATION FUNCTIONS OF DAMS

2019 ◽  
Vol 75 (2) ◽  
pp. I_91-I_96
Author(s):  
Hiroyuki KOJIMA ◽  
Gen NAGATANI ◽  
Ikuo KAWAMURA ◽  
Yuichi TANIWAKI ◽  
Makoto KURAHASHI ◽  
...  
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Reservoir Sedimentation ◽  
Water Utilization

PROPOSAL OF CRITERIA TO EVALUATE CLIMATE CHANGE IMPACTS ON FLOOD CONTROL AND WATER UTILIZATION FUNCTIONS OF DAMS

2018 ◽  
Vol 74 (5) ◽  
pp. I_1333-I_1338
Author(s):  
Hiroyuki KOJIMA ◽  
Gen NAGATANI ◽  
Makoto KURAHASHI ◽  
Ikuo KAWAMURA ◽  
Yoshinobu SATO ◽  
...  
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Climate Change Impacts ◽  
Water Utilization

scholarly journals QUANTITATIVE AND QUALITATIVE EVIDENCE OF ANTHROPOGENIC FINGERPRINT IN FLOODING IN TARABA STATE OF NIGERIA

2021 ◽  
Vol 2 (1) ◽  
pp. 01-19
Author(s):  
T. G. Adelalu ◽  
A. Ibrahim ◽  
E. B. Benjamin ◽  
G. C. Yakubu
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Land Use Change ◽  
Vegetation Cover ◽  
Flood Control ◽  
The State ◽  
Flow Coefficient ◽  
Climatic Data ◽  
Hazard Management ◽  
River Basin Development

Anthropogenic nexus of environmental change is a vital issue in flood control and hazard management. While it is true that some will loom in flood and others in drought, it is no longer valid to argue the authenticity of climate change. Though climate change alters our physical veracities, the problem of yearly flooding is more a human than a natural one in Taraba State. This paper provides technical proof of anthropogenic impression in the incessant flooding in the area. Both spatial and hydro-climatic data were used for this study in addition to designed questionnaire. Hydro and climatic data were collected from Upper Benue River Basin Development Agency, Yola. Correlation matrix was used to show the extent of climatic variation and GIS depicts the land use change. Rainfall has not related well with excess channel flow. Coefficient of variation in rainfall and runoff is not pronounced. R- Factor in all the gauging stations is very low. Built up area occupied just 2.8% of the area accounting for 806.9 hectares. Cultivated area and the bare land was about 13146.2 hectares. This accounts for about 46.3% of the area. Vegetation cover occupied more than half of the study area. This accounts for 50.1% of the land mass of the catchment area under study. Owing to the occurrence of good vegetation cover, which is more than 50% of the basin area, generally one would have expected low occurrence of flooding in the study area. The farmers’ assessment agreed with the scientific analysis. The runoff volumes that traverse the state three decades ago without much disturbance now pose a serious ache. Though Inter catchment link and discharge thereof is a factor, the cogwheel pinpoints land use change and encroachment of floodplain. Parastatals involved in the land survey and planning of the state should wake up to the challenge.

scholarly journals Exploring trade-offs between SDGs for Indus River Dolphin conservation and human water security in the regulated Beas River, India

2021 ◽  
Author(s):  
Andrea Momblanch ◽  
Nachiket Kelkar ◽  
Gill Braulik ◽  
Jagdish Krishnaswamy ◽  
Ian P. Holman
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Extinction Risk ◽  
Freshwater Ecosystems ◽  
Low Flow ◽  
Conservation Strategies ◽  
Climate Change Scenarios ◽  
Indus River ◽  
Systems Model ◽  
Trade Offs

AbstractIn India’s Indo-Gangetic plains, river flows are strongly altered by dams, barrages and water diversions for irrigation, urban supply, hydropower production and flood control. Human demands for freshwater are likely to intensify with climatic and socio-economic changes, exacerbating trade-offs between different sustainable development goals (SDGs) dependent on freshwater (e.g. SDG2, SDG6, SDG7, SDG11 and SDG15). Freshwater ecosystems and endangered aquatic species are not explicitly addressed in the SDGs, but only nested as targets within SDG6 and SDG15. Thus, there is high risk that decisions to advance other SDGs may overlook impacts on them. In this study, we link a water resource systems model and a forecast extinction risk model to analyze how alternative conservation strategies in the regulated Beas River (India) affect the likelihood of survival of the only remaining population of endangered Indus River Dolphins (IRD) in India in the face of climate change-induced impacts on river hydrology and human water demands, explicitly accounting for potential trade-offs between related SDGs. We find that the frequency of low flow released from the main reservoir may increase under some climate change scenarios, significantly affecting the IRD population. The strongest trade-offs exist between the persistence of IRD, urban water supply and hydropower generation. The establishment of ecologically informed reservoir releases combined with IRD population supplementation enhances the probability of survival of the IRD and is compatible with improving the status of relevant SDGs. This will require water managers, conservation scientists, and other stakeholders to continue collaborating to develop holistic water management strategies.

scholarly journals Risks of inundation by tide in Ho Chi Minh City in the context of climate change and sea level rise

2020 ◽  
Vol 2 (6) ◽  
pp. 182-191
Author(s):  
Le Ngoc Tuan ◽  
Tran Thi Kim ◽  
Nguyen Ky Phung
Keyword(s):  
Climate Change ◽  
Sustainable Development ◽  
Sea Level ◽  
Flood Control ◽  
Sustainable Development Goals ◽  
Ho Chi Minh City ◽  
Development Goals ◽  
Flooded Area ◽  
Gis Methods ◽  
Important Basis

This work aimed to assess the risk of inundation by tide in Ho Chi Minh City (HCMC) in the context of climate change by 2100 under scenarios of RCP4.5 and RCP8.5. By modeling and GIS methods, results showed the southern area suffered the most, especially in CanGio, NhaBe and BinhChanh districts. By 2050, the inundated area in these localities would be approximately 3518ha, 677ha, 1576ha under RCP4.5 and 3561ha, 709ha, 1618ha under RCP8.5. The corresponding figures at the end of this century would be 12246ha, 2085ha, 3724ha under RCP4.5, and 14713ha, 2320ha, 4355ha under RCP8.5. This work also simulated the case of considering some flood control projects, thereby, tidal flooding in HCMC would be reduced, especially in BinhChanh, NhaBe, and District 7. In 2025 and 2100 (RCP8.5), as compared with those in the former case (without works), flooded area in NhaBe would decrease 16ha and 3.21ha, respectively. The corresponding figures for Binh Chanh would be 8.71ha and 1.62ha; and for District 7 would be 6.22ha and 2.35ha. The research results provide an important basis for planning suitable adaptation solutions, contributing to sustainable development goals of the local.

scholarly journals Willingness to Pay for Public Benefit Functions of Daecheong Dam Operation: Moderating Effects of Climate Change Perceptions

2021 ◽  
Vol 13 (24) ◽  
pp. 14060
Author(s):  
Heekyun Oh ◽  
Seongjun Yun ◽  
Heechan Lee
Keyword(s):  
Climate Change ◽  
Willingness To Pay ◽  
Flood Control ◽  
Economic Value ◽  
Water Quality Monitoring ◽  
High Involvement ◽  
Change Perception ◽  
Change Perceptions ◽  
Climate Change Perception ◽  
Dam Operation

This study estimates the economic value of the Daecheong Dam for the public function of responding to climate change. It examines the moderating effect of climate change perceptions on value estimates by applying choice experiments (CE). The study specifies three dam function attributes—drought management (DM), flood control (FC), and water quality monitoring (WM)—subdivided into three levels to improve the existing conditions. Survey data from 603 households living in Daejeon, Chungbuk, and Chungnam have been collected to perform the CE. Subsequently, two clusters—high-involvement and low-involvement groups—have been extracted, based on the climate change perception index. The main results of comparing the marginal willingness-to-pay between the two clusters are as follows. The attributes and price variable significantly affected the choice probability to benefit from improvements in the rational signs of the coefficients. This does not violate the independence of the irrelevant alternatives assumption. The improvement values of high-involvement and low-involvement groups are estimated as KRW 21,570 and KRW 14,572 a year per household, respectively. Both show the same value intensities in the order of WM, DM, and FC.

scholarly journals Ghana's Akosombo Dam, Volta Lake Fisheries & Climate Change

Daedalus ◽  
2021 ◽  
Vol 150 (4) ◽  
pp. 124-142
Author(s):  
Stephan F. Miescher
Keyword(s):  
Climate Change ◽  
Flood Control ◽  
Social Scientists ◽  
Planning Stage ◽  
Local Agriculture ◽  
Volta Lake ◽  
Hydroelectric Dam ◽  
New Nation ◽  
Government Records ◽  
Water Issues

Abstract In Ghana, the Pwalugu Dam in the Upper East is in the final planning stage. Whereas promoters of Ghana's first dams emphasized the need for generating electricity to modernize and industrialize the new nation, the planners of Pwalugu have focused on water issues. Due to climate change, droughts have had a devastating impact on local agriculture. The dam's primary purpose is an irrigation scheme and flood control. This essay historicizes these concerns by revisiting the Akosombo Dam, Ghana's largest hydroelectric dam, completed in 1965. The discussion juxtaposes personal recollections of dam-affected communities with reports by administrators, biologists, and social scientists. The essay draws on government records, scientific studies about Volta Lake, and oral histories. Ultimately, it argues, builders and administrators of the Akosombo Dam failed to address most water issues, despite ample knowledge about their existence. One hopes that these shortcomings will not be repeated in the Pwalugu project.

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