scholarly journals Naumore Storage Project Should be the Last Resort of Development on the Main Course of Rapti (West), Nepal

2016 ◽  
Vol 18 ◽  
pp. 1-5
Author(s):  
Hari Man Shrestha
Keyword(s):  
Flood Control ◽  
Flow Regulation ◽  
Essential Elements ◽  
Irrigated Agriculture ◽  
Medium Size ◽  
Hydropower Generation ◽  
Flood Water ◽  
River Waters ◽  
Dry Spell ◽  
Dam Site

Water, food and energy are three essential elements of life and, therefore, they need to be made internally secured in a long lasting manner. In the case of Nepal, river waters are the basic sources of all these elements and are the only resources available indigenously in Nepal for these purposes. Rapti (West), being medium size river of rain-fed nature, the dry spell continues long from December up to the end of May; at the same time the flood waters available particularly in July, August and September create havoc by flooding in the downstream reaches. The Kapilvastu area which can be commanded by the Rapti (West) river does not have other dependable sources for fulfilling its requirements. The only way to fulfill its requirements without affecting downstream users is, thus, to capture a portion of flood water of Rapti behind a storage dam aimed at diversion to Kapilvastu for use during dry season. An appropriate site for such purpose is located at Bhalubang. Hence, this site needs to be developed first to ensure the diversion to Kapilvastu and then a much higher storage dam site at Naumore could, later at appropriate time but within 25 to 30 years after development of Bhalubang site, be developed for increasing the flow regulation potential of the Rapti River so that the hydropower generation, flood control and intensification of irrigated agriculture at its commendable areas, could be maximized. HYDRO Nepal Journal of Water Energy and EnvironmentVolume- 18, 2016, JanuaryPage -1 to 5

Deriving reservoir operating rules considering ecological demands of multiple stations

2021 ◽  
pp. 1-59
Author(s):  
Chen Wu ◽  
Yibo Wang ◽  
Jing Ji ◽  
Pan Liu ◽  
Liping Li ◽  
...  
Keyword(s):  
Reservoir Operation ◽  
Flood Control ◽  
Optimization Models ◽  
Ecological Indicator ◽  
Generation Model ◽  
Hydropower Generation ◽  
Rule Curves ◽  
Constraints Model ◽  
Operating Rule ◽  
Operating Rule Curves

Reservoirs play important roles in hydropower generation, flood control, water supply, and navigation. However, the regulation of reservoirs is challenged due to their adverse influences on river ecosystems. This study uses ecoflow as an ecological indicator for reservoir operation to indicate the extent of natural flow alteration. Three reservoir optimization models are established to derive ecological operating rule curves. Model 1 only considers the maximization of average annual hydropower generation and the assurance rate of hydropower generation. Model 2 incorporates ecological objectives and constraints. Model 3 not only considers the hydropower objectives but also simulates the runoff and calculates the ecological indicator values of multiple downstream stations. The three models are optimized by a simulation-optimization framework. The reservoir ecological operating rule curves are derived for the case study of China's Three Gorges Reservoir. The results represent feasible schemes for reservoir operation by considering both hydropower and ecological demands. The average annual power generation and assurance rate of a preferred optimized scheme for Model 3 are increased by 1.06% and 2.50%, respectively. Furthermore, ecological benefits of the three hydrologic stations are also improved. In summary, the ecological indicator ecoflow and optimization models could be helpful for reservoir ecological operations.

scholarly journals Real-time optimisation of the Hoa Binh reservoir, Vietnam

2011 ◽  
Vol 42 (2-3) ◽  
pp. 217-228 ◽  
Author(s):  
Bertrand Richaud ◽  
Henrik Madsen ◽  
Dan Rosbjerg ◽  
Claus B. Pedersen ◽  
Long L. Ngo
Keyword(s):  
Real Time ◽  
Flood Control ◽  
Hydropower Generation ◽  
Operating Rules ◽  
Forecast Lead Time ◽  
Conflicting Objectives ◽  
Simulation Optimisation ◽  
On Line ◽  
Hoa Binh

Multi-purpose reservoirs often have to be managed according to conflicting objectives, which requires efficient tools for trading-off the objectives. This paper proposes a multi-objective simulation-optimisation approach that couples off-line rule curve optimisation with on-line real-time optimisation. First, the simulation-optimisation framework is applied for optimising reservoir operating rules. Secondly, real-time and forecast information is used for on-line optimisation that focuses on short-term goals, such as flood control or hydropower generation, without compromising the deviation of the long-term objectives from the optimised rule curves. The method is illustrated for optimisation of the Hoa Binh reservoir in Vietnam. The approach is proven efficient to trade-off conflicting objectives. Selected by a Pareto optimisation method, the preferred optimum is able to mitigate the floods in the downstream part of the Red River, and at the same time to increase hydropower generation and to save water for the dry season. The real-time optimisation procedure further improves the efficiency of the reservoir operation and enhances the flexibility for the decision-making. Finally, the quality of the forecast is addressed. The results illustrate the importance of a sufficient forecast lead time to start pre-releasing water in flood situations.

Optimal coordination strategies for flood control and hydropower generation of reservoir

2020 ◽  
Author(s):  
Lin Zhang ◽  
Wei Ding ◽  
Guoli Wang
Keyword(s):  
Water Level ◽  
Flood Control ◽  
Flood Damage ◽  
Hydropower Generation ◽  
Two Stage ◽  
Forecast Uncertainty ◽  
Streamflow Forecast ◽  
Trade Offs ◽  
Water Head ◽  
Optimal Coordination

<p>During flood seasons, the water head of the reservoir is kept in flood limited water level (FLWL) to satisfy the flood control objective, but this runs counter to the need for hydropower generation to maintain a high water-head. This paper focuses on the optimal hedging rules by setting an appropriate FLWL to maximize the benefit of hydropower without increasing the flood damage and raise the water level at the end of flood for non-flood season/future use. Two-stage hydropower functions considering the constraint conditions which include the downstream environmental flow and installed capacity are built. On the basis of studying the marginal utilities of the two-stage hydropower functions, the competitive and collaborative relationships between flood damage and hydropower benefit were analyzed qualitatively. A two-stage reservoir operation model with two objectives that are minimum flood damage and maximum hydropower generation is developed, which considers streamflow forecast uncertainty and acceptable flood risk. The derived OHR from the model can be used to make trade-offs between flood damage and hydropower benefit under different levels of streamflow forecast uncertainty or acceptable risk. Finally, the analysis is applied to the Nierji Reservoir in the north of China. The results indicate that the OHR can increase hydropower generation 1.57x106kw·h and decrease the volume of abandoned water30.04x106m3 average annual.</p>

scholarly journals Hydroecological monitoring of the quality of river waters of the Amudarya river basin in the territory of Uzbekistan

2019 ◽  
Vol 01 (01) ◽  
pp. 12-18
Author(s):  
CHembarisov Elmir Ismailovich ◽  
Mirzakobulov ZHahongir Bahtiyarovich ◽  
Rahimova Matluba Naimovna ◽  
Rasulov Bahadyr Olim ◽  
Tillaeva Zarina Umarovna
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Surface Waters ◽  
Irrigated Agriculture ◽  
Irrigation Water Quality ◽  
Quality Performance ◽  
River Waters ◽  
The Republic ◽  
Scientific Base

The article considers the problems of irrigation water quality in Central Asia through hydroecological monitoring. Practical and scientific recommendations for solving these problems are offered. There are noted the necessity of development of scientific base of researches on all aspects of water quality and protection of water resources; adoption of laws and administrative documents on protection of waters and improvement of their quality; performance of various engineering, technological actions. The hydroecological state of surface waters of large irrigated areas of the Amudarya river basin was studied for regieon: Surkhandarya, Kashkadarya, Khorezm and irrigated zones of the Republic of Karakalpakstan. It is noted that the process of salinization of irrigated lands is dangerous for the region. According to the calculations 50...55 million tons of various salts are came to irrigated annually fields. This is the reason for the deterioration of the hydrological state of irrigated agriculture in the region.

scholarly journals Study of the relation between hydraulic jump and the flood water level in the river on the downstream of a spillway

2019 ◽  
Vol 270 ◽  
pp. 04012 ◽  
Author(s):  
Dwiva Anbiya Taruna ◽  
Mohammad Bagus Adityawan ◽  
Joko Nugroho ◽  
Mohammad Farid ◽  
Arno Adi Kuntoro ◽  
...  
Keyword(s):  
Water Level ◽  
Hydraulic Jump ◽  
Flood Control ◽  
Jump Phenomenon ◽  
Design Standards ◽  
Flood Water ◽  
Stilling Basin ◽  
Closed Conduit ◽  
Downstream Area ◽  
Control Facility

Kuningan Dam which is located in Kuningan District, West Java has 21,8 km2 watershed area. This dam also acts as a flood control facility which functions supported by the reservoir’s topography and its spillway building. The spillway building releases excess water from the dam into the downstream area. In the downstream part of the spillway, usually, hydraulic jump phenomenon occurs which depends on the flood water level of the river. The hydraulic jump used in the designing process of stilling basin length. The stilling basin in the spillway building generally designed using Q100. The spillway in Kuningan Dam is designed as a closed conduit channel. In this study, the Kuningan Dam spillway is re-designed as an open channel using ogee type spillway. Based on the modeling result, the length of hydraulic jump that occurs when modeled with the return period discharge of Q25 is 21.54 m, Q50 is 16.65 m, and Q100 is 0.98 m. It is seen that in Q25 the jump was the furthest, so an elaborate study regarding hydraulic jump phenomenon and design standards of the spillway is required.

scholarly journals How does a nature-based solution for flood control compare to a technical solution? Case study evidence from Belgium

AMBIO ◽  
2021 ◽  
Author(s):  
Francis Turkelboom ◽  
Rolinde Demeyer ◽  
Liesbet Vranken ◽  
Piet De Becker ◽  
Filip Raymaekers ◽  
...  
Keyword(s):  
Flood Control ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Business Case ◽  
Technical Solution ◽  
Benefit Analysis ◽  
Flood Water ◽  
Case Study Analysis ◽  
Sufficient Space

AbstractThe strategy of reconnecting rivers with their floodplains currently gains popularity because it not only harnesses natural capacities of floodplains but also increases social co-benefits and biodiversity. In this paper, we present an example of a successfully implemented nature-based solution (NBS) in the Dijle valley in the centre of Belgium. The research objective is to retrospectively assess cost and benefit differences between a technical solution (storm basins) and an alternative NBS, here the restoration of the alluvial floodplain. The method is a comparative social cost–benefit analysis. The case study analysis reveals similar flood security, lower costs, more ecosystem services benefits and higher biodiversity values associated with the NBS option in comparison to the technical alternative. However, the business case for working with NBS depends substantially on the spatial and socio-ecological context. Chances for successful NBS implementation increase in conditions of sufficient space to retain flood water, when flood water is of sufficient quality, and when economic activity and housing in the floodplain is limited.

Shellmouth Dam Test Fill

1965 ◽  
Vol 2 (3) ◽  
pp. 198-211 ◽  
Author(s):  
P J Rivard ◽  
A Kohuska
Keyword(s):  
Pore Pressure ◽  
Flood Control ◽  
Clay Deposit ◽  
Stability Analyses ◽  
Dam Site ◽  
Settlement Studies ◽  
Alluvial Clay ◽  
Design Construction

The Shellmouth Dam on the Assiniboine River is a flood control project now being built by the federal and Manitoba governments. The upper 50 ft. of foundation at the dam site is a medium to highly plastic alluvial clay deposit containing sand layers and lenses. This is underlain by up to 100 ft. of sands and gravels to shale bedrock.This paper describes the design, construction, and instrumentation of a test fill built at the site of the proposed dam, and includes summaries of pore pressure and movement observations, settlement studies, and stability analyses.

scholarly journals Mosul Dam, NW Iraq: Is a Safe Dam??

2021 ◽  
Vol 5 (2) ◽  
pp. 56-61
Author(s):  
Varoojan Siskian ◽  
Nasrat Adamo ◽  
Nadhir Al-Ansari ◽  
Jan Laue ◽  
Aayda Abdulahad
Keyword(s):  
Flood Control ◽  
Northwestern Part ◽  
Hydropower Generation ◽  
Tigris River ◽  
Current Article ◽  
Grouting Materials ◽  
Earth Fill

Mosul Dam is located in the northwestern part of Iraq impounding the Tigris River; about 60 km north of Mosul city. This project is multipurpose project; to provide water for irrigation, flood control and hydropower generation. The dam is 113 m high and 3650 m long including the spillway. The dam is earth fill type with a mud core. The dam was designed to impound 11.11 km3 because it is based and underlain by gypsum beds alternated with limestone and marl. Therefore, it is planned to use continuous grouting to fill the karst caverns. The used quantity exceeded 95000 tons of solid grouting materials since 1986 up to 2014. After all, is the dam safe? The details are given in the current article.

Sign in / Sign up

Export Citation Format

Share Document