scholarly journals Optimal operation of Hoa Binh reservoir for flood control on Hong-Thai Binh river system

2008 ◽  
Vol 30 (3) ◽  
Author(s):  
Ngo Huy Can ◽  
Nguyen Thanh Don ◽  
Nguyen Hong Phong ◽  
Nguyen Tuan Anh ◽  
Nguyen Van Que
Keyword(s):  
Water Level ◽  
Flood Control ◽  
River System ◽  
Optimal Operation ◽  
Flood Season ◽  
The Mean ◽  
Hoa Binh

In the paper the optimal operation of Hoabinh reservoir for flood control on Hong–Thai Binh river system is presented. The findings show that in the flood season in 1996 if the operation of gates and outlets of Hoa Binh reservoir was made base on the calculated release, the water level at Hanoi would be 12.3 m and the water level of Hoa Binh reservoir would be 98 m. So the calculated release from Hoabinh reservoir in August 1996 can be considered as optimal in the mean that the water level at Hanoi can be controlled and the Hoabinh reservoir still have necessary pool for controlling the next floods.

scholarly journals Optimal Operation of Floodwater Resources Utilization of Lakes in South-to-North Water Transfer Eastern Route Project

2021 ◽  
Vol 13 (9) ◽  
pp. 4857
Author(s):  
Zitong Yang ◽  
Xianfeng Huang ◽  
Jiao Liu ◽  
Guohua Fang
Keyword(s):  
Water Level ◽  
Resource Utilization ◽  
Flood Control ◽  
Optimal Operation ◽  
Water Transfer ◽  
Water Levels ◽  
Reservoir Storage ◽  
Flood Season ◽  
Hongze Lake ◽  
North Water

In order to meet the demand of emergency water supply in the northern region without affecting normal water transfer, considering the use of the existing South-to-North Water Transfer eastern route project to explore the potential of floodwater resource utilization in the flood season of Hongze Lake and Luoma Lake in Jiangsu Province, this paper carried out relevant optimal operating research. First, the hydraulic linkages between the lakes were generalized, then the water resources allocation mode and the scale of existing projects were clarified. After that, the actual available amount of flood resources in the lakes was evaluated. The average annual available floodwater resources in 2003–2017 was 1.49 billion m3, and the maximum available capacity was 30.84 billion m3. Then, using the floodwater resource utilization method of multi period flood limited water levels, the research period was divided into the main flood season (15 July to 15 August) and the later flood season (16 August to 10 September, 11 September to 30 September) by the Systematic Clustering Analysis method. After the flood control calculation, the limited water level of Hongze Lake in the later flood season can be raised from 12.5 m to 13.0 m, and the capacity of reservoir storage can increase to 696 million m3. The limited water level of Luoma Lake can be raised from 22.5 m to 23.0 m (16 August to 10 September), 23.5 m (11 September to 30 September), and the capacity of reservoir storage can increase from 150 to 300 million m3. Finally, establishing the floodwater resource optimization model of the lake group with the goals of maximizing the floodwater transfer amount and minimizing the flood control risk rate, the optimal water allocation scheme is obtained through the optimization algorithm.

scholarly journals Research and Application of Key Technologies for Dynamic Control of Reservoir Water Level in Flood Season

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3576
Author(s):  
Jun Zhang ◽  
Yaowu Min ◽  
Baofei Feng ◽  
Weixin Duan
Keyword(s):  
Water Supply ◽  
Water Level ◽  
Real Time ◽  
Flood Control ◽  
Dynamic Control ◽  
Water Levels ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Danjiangkou Reservoir ◽  
Flood Season

In today’s reservoir operation study, it is urgent to solve the issues on improving flood resource utilization, maximizing reservoir impoundment, and guaranteeing water supply through real-time regulation optimization under the premise of ensuring flood control safety and taking risks properly. Based on previous studies, the key real-time operation technologies for dynamic control of reservoir water levels in flood season are summarized. The Danjiangkou Reservoir was taken as an example, the division of flood stages, reservoir water level requirements for improving water supply guarantee, dynamic control indexes of reservoir water level for beneficial use in stages during the flood season, and flood control dispatching indexes are proposed. Moreover, a practicable real-time flood forecast operation scheme for Danjiangkou Reservoir was compiled. Its application in 2017 indicated that the established scheme can provide strong technical support to ensure the overall benefits of Danjiangkou Reservoir, including flood control, water supply, and power generation.

scholarly journals Forecasting the discharge into Hoa Binh reservoir by applying the connecting model marine - imech1D

2008 ◽  
Vol 30 (3) ◽  
Author(s):  
Nguyen Tien Cuong ◽  
Trinh Thu Phuong
Keyword(s):  
Hydrological Model ◽  
River System ◽  
The Other ◽  
Hydrological Models ◽  
Flood Season ◽  
The Difference ◽  
Three Rivers ◽  
Hoa Binh

Da river is the biggest one of three rivers: Da, Thao and Lo which flow into Hong river, so calculating and forecasting correctly the discharge to Hoa Binh reservoir take an important role in managing the task of flood preventing in the Hong - Thai Binh river system. In this paper, a connected hydraulic-hydrological model is developed. The model was applied to forecast the discharge into Hoa Binh reservoir in the flood season 2006. The difference of this connected hydraulic-hydrological model in comparison with the other hydrological models is using the complete Saint-Venant 1D to simulate flow in rivers. Results of verification of the model show that it is good enough for practice.

scholarly journals Application of Marginal Rate of Transformation in Decision Making of Multi-Objective Reservoir Optimal Operation Scheme

2021 ◽  
Vol 13 (3) ◽  
pp. 1488
Author(s):  
Yueqiu Wu ◽  
Liping Wang ◽  
Yanke Zhang ◽  
Jiajie Wu ◽  
Qiumei Ma ◽  
...  
Keyword(s):  
Power Generation ◽  
Decision Making ◽  
Water Level ◽  
Level Scheme ◽  
Flood Control ◽  
Forecast Error ◽  
Optimal Operation ◽  
Total Power ◽  
Marginal Rate ◽  
Multi Objective

For reservoirs with combined storage capacity for flood control and beneficial purposes, there tends to be potential benefit loss when the flood control limited water level is used in medium and small floods. How to find the optimal water level scheme for profit-making and pursue the optimization of comprehensive benefits has always been a difficult problem in multi-objective reservoir optimal operation. Based on the principle of the maximum benefit obtained by the product conversion curve and the isorevenue line in microeconomics, taking flood control and power generation as two products of a reservoir, a multi-objective optimal operation scheme decision-making model is established to seek the highest water level scheme that can produce the maximum comprehensive benefits of flood control and power generation. A case study of the Three Gorges reservoir in the early flood season of a dry year shows that on the one hand, under the condition of deterministic inflow, the model can work out the optimal water level and the corresponding best equilibrium point for both flood control and power generation, and it can increase the total power output by 4.48% without reducing the flood control benefits; on the other hand, it can also obtain the dynamic control area of the maximum allowable water level for power generation considering inflow forecast error, which provides a theoretical reference for determining the starting water level in medium and small floods and utilizing flood resources.

Determining the Flood Control Level of Small Reservoirs with Fuzzy Decision by Stages

2013 ◽  
Vol 838-841 ◽  
pp. 1753-1758
Author(s):  
Zhi Qi Liu ◽  
Jin Xi Lu ◽  
Jian Jiao ◽  
Qing Zhang
Keyword(s):  
Water Resources ◽  
Water Level ◽  
Flood Control ◽  
Control Level ◽  
Economic Benefits ◽  
Fuzzy Decision ◽  
Small Reservoir ◽  
Flood Season ◽  
Precipitation Characteristics ◽  
Average Annual Precipitation

The limited water level of reservoir by stage, fully consider the seasonal variations of the average annual precipitation characteristics in every reservoirs control catchment. Its not only ensuring the rational use of water resources, increasing economic and social benefits to the reservoir, but also ensuring the safety of flood control reservoir flood season, to protect people's lives and property. Determine flood limit level for small reservoir by installments should consider the balance between the economic benefits from improving the water level and the consumption of human and financial resources caused by the installments flood water level adjustment. At the same time, the water resources should be intelligent used in order to let the level of reservoir get in normal. This paper, according to the characteristics of small reservoir, calculated on the reservoir storage capacity can be increased basis of the existing flood control capacity through calculating the value of membership function during reservoir flood season. So that the new limited water level can be obtained after calculating the reservoir capacity increase according to the capacity-water level graph.

scholarly journals Dynamic change of water level in flood season and sediment regulation in the Three Gorges Reservoir

2018 ◽  
Vol 246 ◽  
pp. 01116
Author(s):  
Man Zhou ◽  
Yangfan Xiao ◽  
Chunming Fang ◽  
Ting Hu
Keyword(s):  
Water Level ◽  
Flood Control ◽  
Dynamic Change ◽  
Flood Season ◽  
Capacity Loss ◽  
Water And Sediment ◽  
Reservoir Siltation ◽  
Sedimentation Volume ◽  
Sediment Reduction ◽  
And Storage

Based on the operation requirements of flood control, navigation, power generation, flood resource utilization and sediment reduction, this paper developed the schemes with dynamic change of water level at different periods in flood season, and focused on the response relationship between the different schemes with dynamic change of water level in flood season and the change of sediment erosion under the new water and sediment and the measured water and sediment conditions. The results indicate that the total sedimentation volume and the sedimentation volume above elevation 145m are basically about twice that of the new water and sediment series, since the amount of sand entering the reservoir in 2003-2012 is basically twice that of the new flow water and sediment series. Regardless of the type of water and sediment series, the scheme with dynamic change of water level is better than the preliminary design expectation in terms of reservoir siltation and storage capacity loss.

scholarly journals Analytical approach for determining the mean water level profile in an estuary with substantial fresh water discharge

2015 ◽  
Vol 12 (8) ◽  
pp. 8381-8417 ◽  
Author(s):  
H. Cai ◽  
H. H. G. Savenije ◽  
C. Jiang ◽  
L. Zhao ◽  
Q. Yang
Keyword(s):  
Water Level ◽  
Fresh Water ◽  
Flood Control ◽  
Analytical Approach ◽  
Water Discharge ◽  
Water Levels ◽  
Wide Range ◽  
Mean Water Level ◽  
The Mean ◽  
Fresh Water Discharge

Abstract. Although modestly, the mean water level in estuaries rises in landward direction induced by a combination of the salinity gradient, the tidal asymmetry, and the backwater effect. The water level slope is increased by the fresh water discharge. However, the interactions between tide and river flow and their individual contributions to the rise of the mean water level along the estuary are not yet completely understood. In this study, we adopt an analytical approach to describe the tidal wave propagation under the influence of fresh water discharge, in which the friction term is approximated by a Chebyshev polynomials approach. The analytical model is used to quantify the contributions made by tide, river, and tide–river interaction to the water level slope along the estuary. Subsequently, the method is applied to the Yangtze estuary under a wide range of river discharge conditions and the influence of tidal amplitude and fresh water discharge on the longitudinal variation of mean water level is explored. The proposed method is particularly useful for accurately predicting water levels and the frequency of extreme high water, relevant for water management and flood control.

scholarly journals Risk and benefit analysis of multifunctional reservoir staged operating

2021 ◽  
Author(s):  
Chongxun Mo ◽  
Yifan Wu ◽  
Yuli Ruan ◽  
Shutan Zhao ◽  
Juliang Jin
Keyword(s):  
Flood Control ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Electrical Energy ◽  
Fuzzy Comprehensive Evaluation ◽  
Scientific Basis ◽  
Optimal Operation ◽  
Flood Season ◽  
River Reservoir ◽  
Effective Use

Abstract An optimal flood-limiting water level (FLWL) is needed to solve the contradiction between flood control safety measures and utilizable benefits. Therefore, this paper took the Chengbi River reservoir as an example, applied the Monte Carlo stochastic simulation and water consumption rate per unit of electrical energy methods to calculate the flood control risks and benefits associated with raising the FLWL in stages, and used the fuzzy comprehensive evaluation method to select the optimal FLWL for each stage of the flood season, which provided a scientific basis for the effective use of rainfall and flood data in the reservoir. The major outcomes of the study are as follows: (1) The reservoir flood season can be divided into a preflood season (April to May), a main flood season (June to August), and a later flood season (September to October). (2) The flood risks and power generation benefits of the reservoir are calculated after raising the FLWL, the optimal FLWL for the main flood season is 185.5 m, and the optimal FLWL for the later flood season is 187.50 m, while the FLWL in the preflood season should be kept at 185.0 m. The above results can provide scientific support for flood control safety planning and the optimal operation of reservoirs.

Study on Flood Pre-Discharged Rule-Making for Xihe Reservoir Flood Control

2013 ◽  
Vol 864-867 ◽  
pp. 2428-2432
Author(s):  
Zhao Liu ◽  
Qing Wang ◽  
Qiu Yi Xi ◽  
Zhi Feng Jia ◽  
Chun Yan Xu
Keyword(s):  
Power Generation ◽  
High Risk ◽  
Water Level ◽  
Reservoir Operation ◽  
Flood Control ◽  
Control Level ◽  
Hydropower Station ◽  
Flood Season ◽  
Rule Application ◽  
Rule Making

In order to increase power generation of hydropower station,a higher flood control level was favorable for most of the hydropower station in flood season,but this could bring about high risk for reservoir operation sometimes.Taken Xihe reservoir for example in this paper,by analyzing the long series of the flood characters on damsite,storage and discharge capability of the reservoir,a feasible flood control level was put forward in the premise of ensuring flood control safety.Moreover,the pre-discharged rule was figured out on the basis of formulated pre-discharged index,pre-discharged flow and scheme comparison, finally, the safety of the rule application was confirmed by flood routing.It is expected that more power could be generated in flood season as a result of risen water level before the dam.

scholarly journals Evaluating Simple Methodology for Piezoelectric Level Sensors Protection

Proceedings ◽  
2019 ◽  
Vol 48 (1) ◽  
pp. 30
Author(s):  
Luis Hamilton Pospissil Garbossa ◽  
Argeu Vanz ◽  
Matias Guilherme Boll ◽  
Hamilton Justino Vieira
Keyword(s):  
Water Level ◽  
Flood Control ◽  
Low Cost ◽  
Solid Particles ◽  
Storm Events ◽  
Sewer Systems ◽  
Continuous Monitor ◽  
Level Monitoring ◽  
Water Level Monitoring

The increasing frequency of extreme storm events has implications for the operation of sewer systems, storm water, flood control monitoring and tide level variations. Accurate and continuous monitor water level monitoring is demanded in different environments. Piezoelectric sensors are widely used for water level monitoring and work submerged in waters subject to the presence of solid particles, biological fouling and saltwater oxidation. This work aimed to develop a simple, low-cost methodology to protect sensors over long-term deployment. The results show that simple actions, costing less than 2 EUR, can protect and extend the lifecycle of equipment worth over 2000 EUR, ensuring continuous monitoring and maintaining quality measurements.

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