Foundational Study on Water Use and Flood Control Effect by the Large Scale Reservoir

The risk inevitably exists in the process of flood control operation and decision-making of reservoir group, due to the hydrologic and hydraulic uncertain factors. In this study different stochastic simulation methods were applied to simulate these uncertainties in multi-reservoir flood control operation, and the risk caused by different uncertainties was evaluated from the mean value, extreme value and discrete degree of reservoir occupied storage capacity under uncertain conditions. In order to solve the conflict between risk assessment indexes and evaluate the comprehensive risk of different reservoirs in flood control operation schemes, the subjective weight and objective weight were used to construct the comprehensive risk assessment index, and the improved Mahalanobis distance TOPSIS method was used to select the optimal flood control operation scheme. The proposed method was applied to the flood control operation system in the mainstream and its tributaries of upper reaches of the Yangtze River basin, and 14 cascade reservoirs were selected as a case study. The results indicate that proposed method can evaluate the risk of multi-reservoir flood control operation from all perspectives and provide a new method for multi-criteria decision-making of reservoir flood control operation, and it breaks the limitation of the traditional risk analysis method which only evaluated by risk rate and cannot evaluate the risk of the multi-reservoir flood control operation system.

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The application of environmental governance for sustainable watershed-based management

Asia-Pacific Journal of Regional Science ◽

10.1007/s41685-020-00185-1 ◽

2021 ◽

Author(s):

Seiichi Kagaya ◽

Tetsuya Wada

Keyword(s):

Environmental Protection ◽

River Basin ◽

Watershed Management ◽

Water Use ◽

Flood Control ◽

Environmental Governance ◽

Planning Process ◽

Environment Assessment ◽

Control Water

AbstractIn recent years, it has become popular for some of countries and regions to adapt the system of governance to varied and complex issues concerned with regional development and the environment. Watershed management is possibly the best example of this. It involves flood control, water use management and river environment simultaneously. Therefore, comprehensive watershed-based management should be aimed at balancing those aims. The objectives of this study are to introduce the notion of environmental governance into the planning process, to establish a method for assessing the alternatives and to develop a procedure for determining the most appropriate plan for environmental governance. The planning process here is based on strategic environment assessment (SEA). To verify the hypothetical approach, the middle river basin in the Tokachi River, Japan was selected as a case study. In practice, after workshop discussions, it was found to have the appropriate degree of consensus based on the balance of flood control and environmental protection in the watershed.

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Understanding Water Use Conflicts to Advance Collaborative Planning: Lessons Learned from Lake Diefenbaker, Canada

Water ◽

10.3390/w13131756 ◽

2021 ◽

Vol 13 (13) ◽

pp. 1756

Author(s):

Jania Chilima ◽

Jill Blakley ◽

Harry Diaz ◽

Lalita Bharadwaj

Keyword(s):

Water Use ◽

Flood Control ◽

Collaborative Planning ◽

Lessons Learned ◽

Canadian Prairie ◽

Water Users ◽

Management Procedures ◽

Lake Diefenbaker ◽

Regulatory Instruments ◽

Water Uses

Conflicts around the multi-purpose water uses of Lake Diefenbaker (LD) in Saskatchewan, Canada need to be addressed to meet rapidly expanding water demands in the arid Canadian prairie region. This study explores these conflicts to advance collaborative planning as a means for improving the current water governance and management of this lake. Qualitative methodology that employed a wide participatory approach was used to collect focus group data from 92 individuals, who formed a community of water users. Results indicate that the community of water users is unified in wanting to maintain water quality and quantity, preserving the lake’s aesthetics, and reducing water source vulnerability. Results also show these users are faced with water resource conflicts resulting from lack of coherence of regulatory instruments in the current governance regime, and acceptable management procedures of both consumptive and contemporary water uses that are interlinked in seven areas of: irrigation, industrial, and recreational water uses; reservoir water level for flood control and hydroelectricity production; wastewater and lagoon management; fish farm operations; and regional water development projects. As a means of advancing collaborative planning, improvements in water allocation and regulatory instruments could be made to dissipate consumptive use conflicts and fill the under-regulation void that exists for contemporary water uses. Additionally, a comprehensive LD water use master plan, as a shared vision to improve participation in governance, could be developed to direct the water uses that have emerged over time. This study suggests that these three areas are practical starting conditions that would enable successful collaborative planning for the seven areas of water uses. Focusing on these three areas would ensure the current and future needs of the community of water users are met, while avoiding reactive ways of solving water problems in the LD region, especially as the water crisis in the Canadian Prairie region where LD is located is expected to intensify.

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On an improved sub-regional water resources management representation for integration into earth system models

Hydrology and Earth System Sciences ◽

10.5194/hess-17-3605-2013 ◽

2013 ◽

Vol 17 (9) ◽

pp. 3605-3622 ◽

Cited By ~ 61

Author(s):

N. Voisin ◽

H. Li ◽

D. Ward ◽

M. Huang ◽

M. Wigmosta ◽

...

Keyword(s):

Water Resources ◽

Flood Control ◽

Large Scale ◽

Regulation System ◽

Earth System ◽

Mean Flow ◽

System Models ◽

Operating Rules ◽

Reservoir Models ◽

Earth System Models

Abstract. Human influence on the hydrologic cycle includes regulation and storage, consumptive use and overall redistribution of water resources in space and time. Representing these processes is essential for applications of earth system models in hydrologic and climate predictions, as well as impact studies at regional to global scales. Emerging large-scale research reservoir models use generic operating rules that are flexible for coupling with earth system models. Those generic operating rules have been successful in reproducing the overall regulated flow at large basin scales. This study investigates the uncertainties of the reservoir models from different implementations of the generic operating rules using the complex multi-objective Columbia River Regulation System in northwestern United States as an example to understand their effects on not only regulated flow but also reservoir storage and fraction of the demand that is met. Numerical experiments are designed to test new generic operating rules that combine storage and releases targets for multi-purpose reservoirs and to compare the use of reservoir usage priorities and predictors (withdrawals vs. consumptive demands, as well as natural vs. regulated mean flow) for configuring operating rules. Overall the best performing implementation is with combined priorities rules (flood control storage targets and irrigation release targets) set up with mean annual natural flow and mean monthly withdrawals. The options of not accounting for groundwater withdrawals, or on the contrary, of assuming that all remaining demand is met through groundwater extractions, are discussed.

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MEDICAL AND ENVIRONMENTAL ASPECTS OF THE DEGRADATION OF THE PERMAFROST ZONE: PROBLEM OF PALEOVIRAL CONTAMINATION

Hygiene and Sanitation ◽

10.18821/0016-9900-2017-96-8-706-711 ◽

2019 ◽

Vol 96 (8) ◽

pp. 706-711

Author(s):

Leonid I. Elpiner ◽

A. V. Dzyuba

Keyword(s):

Surface Water ◽

Groundwater Contamination ◽

Water Use ◽

Large Scale ◽

Permafrost Zone ◽

Environmental Aspects ◽

Drinking Purposes

We present the concept of a possible global viral infestation associated with the processes of permafrost melting and probability of groundwater contamination with paleoviruses. The most realistic mechanism of the development of this process is considered, as well as possible ways of forming of a new epidemic situation, depending on characteristics of groundwater and surface water use for drinking purposes by the population of the permafrost zone (permafrost). The necessity of in-depth development of large-scale multi-disciplinary researches in order to clarify the pathogenetic significance of paleoviruses in the permafrost zone and assess the need of the development of the composition and the nature of the complex environmental and anti-epidemic measures is substantiated.

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A novel framework of deriving joint impoundment rules for large-scale reservoir system based on a classification-aggregation-decomposition approach

10.5194/hess-2019-586 ◽

2020 ◽

Author(s):

Shaokun He ◽

Shenglian Guo ◽

Chong-Yu Xu ◽

Kebing Chen ◽

Zhen Liao ◽

...

Keyword(s):

Flood Control ◽

Large Scale ◽

Geographical Location ◽

Nsga Ii ◽

Decomposition Approach ◽

Flood Prevention ◽

Reservoir System ◽

Upper Yangtze River ◽

The Upper Yangtze River ◽

Progressive Optimization

Abstract. Joint and optimal impoundment operation of the large-scale reservoir system has become more crucial for modern water management. Since the existing techniques fail to optimize the large-scale multi-objective impoundment operation due to the complex inflow stochasticity and high dimensionality, we develop a novel combination of parameter simulation optimization and classification-aggregation-decomposition approach here to overcome these obstacles. There are four main steps involved in our proposed framework: (1) reservoirs classification based on geographical location and flood prevention targets; (2) assumption of a hypothetical single reservoir in the same pool; (3) the derivation of the initial impoundment policies by the non-dominated sorting genetic algorithm-II (NSGA-II); (4) further improvement of the impoundment policies via Parallel Progressive Optimization Algorithm (PPOA). The framework potential is performed on China's mixed 30-reservoir system in the upper Yangtze River. Results indicate that our method can provide a series of schemes to refer to different flood event scenarios. The best scheme outperforms the conventional operating rule, as it increases impoundment efficiency from 89.50 % to 94.16 % and hydropower generation by 7.70 billion kWh (or increase 3.79 %) while flood control risk is less than 0.06.

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Freshwater, Fish and the Future: Proceedings of the Global Cross-Sectoral Conference

Freshwater, Fish and the Future: Proceedings of the Global Cross-Sectoral Conference ◽

10.47886/9789251092637.ch20 ◽

2016 ◽

Keyword(s):

Puerto Rico ◽

Freshwater Fish ◽

Water Use ◽

Large Scale ◽

River Flow ◽

Fish Assemblages ◽

Physical Habitat ◽

Resource Exploitation ◽

Ecological Processes ◽

Tropical Island

<em>Abstract.</em> —Freshwater tropical island environments support a variety of fishes that provide cultural, economic, and ecological services for humans but receive limited scientific, conservation, and public attention. Puerto Rico is a Caribbean tropical island that may serve as a model to illustrate the interactions between humans and natural resources in such complex ecosystems. The native freshwater fish assemblage of Puerto Rico is distinct from mainland assemblages in that the assemblage is not diverse, all species are diadromous, and they may be exploited at multiple life stages (e.g., postlarva, juvenile, adult). Primary large-scale drivers of recent water-use policy include economic growth, human population density, and urbanization, with climate change as an overarching influence. Watershed and riparian land use, water quality, river flow and instream physical habitat, river habitat connectivity, exotic species, and aquatic resource exploitation are important proximate factors affecting the ecosystem and fisheries. Research on ecological processes and components of the stream and river fish assemblages has expanded the knowledge base in the past decade with the goal of providing critical information for guiding the conservation and management of the lotic resource to optimize ecosystem function and services. The greatest challenge facing Caribbean island society is developing policies that balance the needs for human water use and associated activities with maintaining aquatic biodiversity, ecological integrity and services, and sustainable fisheries. Achieving this goal will require broad cooperation and sustained commitment among public officials, agency administrators, biologists, and the public toward effective resource management.

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Evaluation of Environmental and Ecological Impacts of the Leading Large-Scale Reservoir on the Upper Reaches of the Yellow River

Sustainability ◽

10.3390/su11143818 ◽

2019 ◽

Vol 11 (14) ◽

pp. 3818

Author(s):

Jun Qiu ◽

Tie-Jian Li ◽

Fang-Fang Li

Keyword(s):

Flood Control ◽

Large Scale ◽

Yellow River ◽

Yellow River Basin ◽

Water Area ◽

Economic Benefits ◽

Control Area ◽

Ecological Impacts ◽

The Yellow River ◽

Water Demands

Large-scale reservoirs have played a significant role in meeting various water demands and socio-economic development, while they also lead to undeniable impacts on the environment and ecology. The Longyangxia reservoir located on the Yellow River is the first large-scale reservoir on the upper Yellow River with a control area of 18% of the entire Yellow River Basin. Since it was put into operation in 1987, it has made great contributions to the national economy for over 30 years. In this study, the socio-economic benefits of the Longyangxia reservoir in power generation, water supply, flood control, and ice prevention are investigated. More importantly, its impacts on the ecology and environment are also presented and analyzed, such as the impacts on river morphology, flow regimes, peak flow, fish, phytoplankton, and zooplankton. It can be concluded that the construction of the Longyangxia reservoir contributes greatly to socio-economic benefits, the water area nearby has formed a new ecological environment, and the trophic level of the aquatic environment has probably increased.

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