Flood control ability of river-type reservoirs using stochastic flood simulation and dynamic capacity flood regulation

2020 ◽  
Vol 257 ◽  
pp. 120809 ◽  
Author(s):  
Zhu Jing ◽  
Wenjie An ◽  
Shanghong Zhang ◽  
Zhongxi Xia
Keyword(s):  
Flood Control ◽  
Flood Simulation ◽  
Dynamic Capacity ◽  
Flood Regulation ◽  
River Type

scholarly journals Inflow Flood Simulation and Risk Analysis of Cascade Reservoirs

2018 ◽  
Vol 246 ◽  
pp. 01106
Author(s):  
Jing Huang ◽  
Jiqing Li ◽  
Pengteng Liang
Keyword(s):  
Risk Analysis ◽  
Flood Control ◽  
Flood Routing ◽  
Three Gorges ◽  
Design Flood ◽  
Flood Simulation ◽  
Cascade Reservoirs ◽  
The Three Gorges ◽  
Flood Regulation ◽  
Risk Rate

The risk of flood control in cascade reservoirs reflects the possibility of unforeseen events in upstream reservoirs under certain space-time conditions during the operation of flood control. Using @RISK software and a stochastic simulation model to simulate the inflow flood of cascade reservoirs, the flood routing of cascade reservoirs and the risk analysis of the highest water level were carried out based on the flood regulation rules of Three Gorges-Gezhouba cascade reservoirs. The results of simulation calculations show that the risk rate of the Three Gorges-Gezhouba cascade reservoir is lower than its design flood standard, which can ensure the safety of flood control.

scholarly journals Development and Integration of Sub-Daily Flood Modelling Capability within the SWAT Model and a Comparison with XAJ Model

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1263 ◽  
Author(s):  
Dachen Li ◽  
Simin Qu ◽  
Peng Shi ◽  
Xueqiu Chen ◽  
Feng Xue ◽  
...  
Keyword(s):  
Time Scale ◽  
Flood Control ◽  
Assessment Tool ◽  
Spatial Scales ◽  
Swat Model ◽  
Flood Forecasting ◽  
Base Flow ◽  
Flood Simulation ◽  
Promising Tool ◽  
Daily Time

To date, floods have become one of the most severe natural disasters on Earth. Flood forecasting with hydrological models is an important non-engineering measure for flood control and disaster reduction. The Xin’anjiang (XAJ) model is the most widely used hydrological model in China for flood forecasting, while the Soil and Water Assessment Tool (SWAT) model is widely applied for daily and monthly simulation and has shown its potential for flood simulation. The objective of this paper is to evaluate the performance of the SWAT model in simulating floods at a sub-daily time-scale in a slightly larger basin and compare that with the XAJ model. Taking Qilijie Basin (southeast of China) as a study area, this paper developed the XAJ model and SWAT model at a sub-daily time-scale. The results showed that the XAJ model had a better performance than the sub-daily SWAT model regarding relative runoff error (RRE) but the SWAT model performed well according to relative peak discharge error (RPE) and error of occurrence time of peak flow (PTE). The SWAT model performed unsatisfactorily in simulating low flows due to the daily calculation of base flow but behaved quite well in simulating high flows. We also evaluated the effect of spatial scale on the SWAT model. The results showed that the SWAT model had a good applicability at different spatial scales. In conclusion, the sub-daily SWAT model is a promising tool for flood simulation though more improvements remain to be studied further.

scholarly journals Research and application of the flood simulation and operation model in Beijing

2020 ◽  
Vol 165 ◽  
pp. 04018
Author(s):  
Fuxin Chai ◽  
Shu Liu ◽  
Yang Sun ◽  
Fenglin Huo
Keyword(s):  
Flood Control ◽  
Economic Loss ◽  
Coupling Model ◽  
Scientific Basis ◽  
Operation System ◽  
Flood Simulation ◽  
Fundamental Information ◽  
Real Time Information ◽  
Downstream Area ◽  
Time Information

This study built a coupling model of hydrology and hydrodynamics for flood forecasting and reservoir-dam joint scheduling. And using HTML5, java, and WebGIS technology, developed a flood control operation system based on B/S framework for Beijing, integrated real-time information and fundamental information of metrology, rainfall, water flow, engineering situation, and waterlogging of Beijing. Through verification, the system has been successfully adopted to analyze the 2018 Ampil typhoon and provide a scientific basis for reservoirs operation including Yaoqiaoyu, Shachang, Haizi, ensuring safety of the reservoirs and reducing the economic loss of downstream area of reservoir.

scholarly journals Balancing energy and environmental concerns: the case of the Kayraktepe dam, Turkey

2012 ◽  
Vol 9 (10) ◽  
pp. 11769-11789
Author(s):  
Ö. Sever ◽  
Ş. Tiğrek ◽  
N. Şarlak
Keyword(s):  
Flood Control ◽  
Large Scale ◽  
Feasibility Studies ◽  
Irrigation Project ◽  
Balancing Energy ◽  
New Formulation ◽  
Hydropower Stations ◽  
Large Dam ◽  
Run Of River ◽  
River Type

Abstract. In this study, an alternative solution for a large dam, namely the Kayraktepe Dam in Turkey, is investigated. The dam was planned for flood control, energy generation and flow regulation for a downstream irrigation project more than 30 yr ago, but until now the project has not begun due to it receiving severe criticism about environmental and social considerations. The project formulation was redeveloped several times in the past but the options were not found to be feasible. In this study, a detailed analysis of the available feasibility studies is provided and then a new formulation, consisting of the proposed one medium dam and five run-of-river type hydropower stations instead of a large scale dam, is evaluated. The new formulation is equivalent to the existing project in terms of energy production and flood control. On the other hand, there are some benefits relative to other configurations as solutions to some of the environmental and social problems being addressed.

scholarly journals Effectivity of kiwi and sukamahi dam on jakarta flood control

2018 ◽  
Vol 7 (3.29) ◽  
pp. 134
Author(s):  
Airlangga Mardjono ◽  
Pitojo Tri Juwon ◽  
Lily Montarcih Limantara ◽  
Ery Suhartan
Keyword(s):  
Urban Areas ◽  
Flood Control ◽  
Residential Areas ◽  
Final Test ◽  
Flood Simulation ◽  
Flood Volume ◽  
Huge Impact ◽  
Level Method ◽  
The 19Th Century ◽  
Flood Prone Areas

Various infrastructures such as flood levees, dams and reservoirs of flood control began to be developed in the 19th century to the 20th century. These buildings are very effective in controlling the flow of rivers and preventing flood waters from entering residential areas located in flood-prone areas. Flooding in urban areas has a huge impact, covering all aspects of life as well as on the landscape. Ciliwung is one of the rivers that allegedly contributed to the problem of flood in Jakarta, various engineering done on Ciliwung to help control flooding in Jakarta. One of the engineering done is the construction plan of Ciawi Reservoir and Sukamahi Reservoir. In this research, the writer performed the flood calculation using Nakayasu while method of flooding is calculated using the pool routine level method. The effectiveness of these two reservoirs can be determined by simulating floods in the existing condition and comparing them with the flood simulation after the construction of the dam. The final test of this research is to determine the effectiveness level of Ciawi and Sukamahi dam infrastructure in reducing flood volume in Jakarta.  

scholarly journals Exploitable Potential, Theoretical Potential, Technical Potential, Storage Potential and Impediments to Development of the Potential: The Nepalese Perspective

2016 ◽  
Vol 19 ◽  
pp. 1-5 ◽  
Author(s):  
Hari Man Shrestha
Keyword(s):  
Scale Development ◽  
Flood Control ◽  
Flow Regulation ◽  
Dry Season ◽  
National Boundary ◽  
Technical Potential ◽  
Storage Potential ◽  
Downstream Flow ◽  
Run Of River ◽  
River Type

Exploitable potential is an ultimate derivable of theoretical potential, technical potential and/or storage potential. A number of hurdles come across when a potential site has to be exploited, thus, all theoretically and/or technically available potential cannot actually be developed/ exploited. Nepal is not an exception in this respect. Exploitation of run-of-river schemes has much less hurdle in comparison with storage development. The storage development, particularly the larger scale development, has even international implications, because the benefits of such development spread far beyond the national boundary. In the Nepalese case the downstream country, particularly India, is reluctant to recognize the downstream flow regulation benefits arising from flood-control and dry season flow augmentation. As such the current focus of exploitation of Nepalese hydro-potential should be on run-of-river type development and smaller size storage developments which can easily be materialized without much hurdle, but in a coordinated and well scheduled manner in a way not to hamper the larger storage development at the opportune future dates.HYDRO Nepal JournalJournal of Water, Energy and EnvironmentIssue: 19Page:1-5

scholarly journals Comparison of methods for separating flood frequency of reservoir by sub-seasons

2015 ◽  
Vol 12 (10) ◽  
pp. 10431-10455 ◽  
Author(s):  
J. Li ◽  
M. Xie ◽  
K. Xie ◽  
R. Li
Keyword(s):  
Flood Control ◽  
Flood Frequency ◽  
Water Levels ◽  
Von Mises Distribution ◽  
Distribution Method ◽  
Fractal Method ◽  
Frequency Distributions ◽  
Flood Season ◽  
Flood Regulation ◽  
Von Mises

Abstract. The development of separate flood frequency distributions for different sub-seasons within a year can be useful for protection, storage and utilization of flood flows for the reservoir operation management. This paper applies conventional statistical method, fractal method and the mixed Von Mises distribution to the separation of flood sub-seasons for inflows to Hongfeng Reservoir in China. Design floods are found for different sub-seasons, along with flood control levels for flood regulation. The flood season is divided into four sub-seasons using the fractal method: the pre-rainy season (May), main-flood season (June and July), late-flood season I (August) and late-flood season II (September). The mixed Von Mises distribution method accounts for the general flood pattern and combines August and September as one late-flood season, for three sub-seasons with different frequency distributions. The flood regulation calculation results show little difference between the control water levels in August and September, so the two can be combined into one period.

1D and 2D Coupled Numerical Model for Flood Control in Middle Reach of Huaihe River

2013 ◽  
Vol 275-277 ◽  
pp. 2659-2668
Author(s):  
Zhen Kun Ma ◽  
Zi Wu Fan ◽  
Ming Zhang ◽  
Yi Lu Su ◽  
Zhi Ling Sun
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
River Basin ◽  
Flood Control ◽  
Flood Forecast ◽  
Huaihe River Basin ◽  
Middle Reach ◽  
Huaihe River ◽  
Flood Regulation ◽  
The Huaihe River

The core technique of flood forecast and pre-warning of a river basin is the numerical simulation of flood process in a complicated flood control system. According to the structural features, flood features, and flood process mechanism of a large and complicated flood control system, a 1D and 2D coupled numerical simulation model was established. The 1D model was used for the trunk river and main branches, and the 2D model was used for flood districts. The coupled 1D and 2D was used to simulate the flood regulation and process in rivers, lakes, flood districts, and floodways. A case study was conducted in the section from the Wangjiaba to Bengbu floodgates in the middle reach of the Huaihe River. The coupled model was employed to synchronously simulate the branch rivers and trunk flood of the river basin and to improve the accuracy of flood simulation, flood forecast, and regulation of the river basin. The parameters of the model for simulating the flood process of the Huaihe River Basin in 2003 were calculated and verified, and the flood process in 2007 was demonstrated. The simulated results show that the flood regulation and process can be accurately simulated by the proposed numerical model, and the accuracy requirements can be satisfied. Finally, the model was applied to the effect analysis of a four-grade emergency flood control plan in the Huaihe River Basin.

scholarly journals Ensemble flood simulation for a small dam catchment in Japan using nonhydrostatic model rainfalls. Part 2: Flood forecasting using 1600 member 4D-EnVAR predicted rainfalls

2019 ◽  
Author(s):  
Kenichiro Kobayashi ◽  
Le Duc ◽  
Tsutao Oizumi ◽  
Kazuo Saito ◽  
Keyword(s):  
Flood Control ◽  
Optimization Technique ◽  
Flood Forecasting ◽  
Rainfall Runoff ◽  
Flood Simulation ◽  
Nonhydrostatic Model ◽  
Rainfall Runoff Model ◽  
Inflow Discharge ◽  
Runoff Model ◽  
Assimilation System

Abstract. This paper elaborated the feasibility of flood forecasting using a distributed rainfall-runoff model and huge number of ensemble rainfalls with an advanced data assimilation system. Specifically, 1600 ensemble rainfalls simulated by a four-dimensional ensemble variational assimilation system with the JMA nonhydrostatic model (4D-EnVAR-NHM) were given to the rainfall-runoff model to simulate the inflow discharge to a small dam catchment (Kasahori dam; approx. 70 km2) in Niigata, Japan. The results exhibited that the ensemble flood forecasting can indicate the necessity of flood control operation and emergency flood operation with the occurrence probability and a lead time (e.g. 12 hours). Thus, the ensemble flood forecasting may be able to inform us the necessity of the early evacuation of the inhabitant living downstream of the dam e.g. half day before the occurrence. On the other hand, the results also showed that the exact forecasting to reproduce the discharge hydrograph several hours before the occurrence is yet difficult, and some optimization technique is necessary such as the selection of the good ensemble members.

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