Impact of regulated water levels on willows (Salix subfragilis) at a flood-control dam, and the use of hydrogen peroxide as an indicator of environmental stress

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.

Download Full-text

Ice jam mitigation

Canadian Journal of Civil Engineering ◽

10.1139/l90-081 ◽

1990 ◽

Vol 17 (5) ◽

pp. 675-685 ◽

Cited By ~ 12

Author(s):

Harold S. Belore ◽

Brian C. Burrell ◽

Spyros Beltaos

Keyword(s):

Key Words ◽

Carrying Capacity ◽

Flood Control ◽

Human Life ◽

Water Levels ◽

Economic Losses ◽

River Ice ◽

Ice Jams ◽

Ice Jam ◽

Ice Breakup

In Canada, flooding due to the rise in water levels upstream of an ice jam, or the temporary exceedance of the flow and ice-carrying capacity of a channel upon release of an ice jam, has resulted in the loss of human life and extensive economic losses. Ice jam mitigation is a component of river ice management which includes all activities carried out to prevent or remove ice jams, or to reduce the damages that may result from an ice jam event. This paper presents a brief overview of measures to mitigate the damaging effects of ice jams and contains a discussion on their application to Canadian rivers. Key words: controlled ice breakup, flood control, ice jams, ice management, river ice.

Download Full-text

Applications of Data-Driven Modelling and Machine Learning in Control of Water Resources

Computational Intelligence in Control ◽

10.4018/978-1-59140-037-0.ch012 ◽

2011 ◽

pp. 197-217 ◽

Cited By ~ 5

Author(s):

D. P. Solomatine

Keyword(s):

Machine Learning ◽

Water Resources ◽

Computational Intelligence ◽

Flood Control ◽

Water Levels ◽

Data Driven ◽

Real Time Control ◽

Modeling And Control ◽

Physically Based ◽

And Control

Traditionally, management and control of water resources is based on behavior-driven or physically based models based on equations describing the behavior of water bodies. Since recently models built on the basis of large amounts of collected data are gaining popularity. This modeling approach we will call data-driven modeling; it borrows methods from various areas related to computational intelligence—machine learning, data mining, soft computing, etc. The chapter gives an overview of successful applications of several data-driven techniques in the problems of water resources management and control. The list of such applications includes: using decision trees in classifying flood conditions and water levels in the coastal zone depending on the hydrometeorological data, using artificial neural networks (ANN) and fuzzy rule-based systems for building controllers for real-time control of water resources, using ANNs and M5 model trees in flood control, using chaos theory in predicting water levels for ship guidance, etc. Conclusions are drawn on the applicability of the mentioned methods and the future role of computational intelligence in modeling and control of water resources.

Download Full-text

Comparison of Large Woody Debris Prototypes in a Large Scale Non-flume Physical Model

E3S Web of Conferences ◽

10.1051/e3sconf/20184005010 ◽

2018 ◽

Vol 40 ◽

pp. 05010

Author(s):

Brian Perry ◽

Colin Rennie ◽

Andrew Cornett ◽

Paul Knox

Keyword(s):

Physical Model ◽

Flood Control ◽

Large Scale ◽

Woody Debris ◽

Water Levels ◽

Mitigation Strategies ◽

Large Woody Debris ◽

Debris Accumulation ◽

The Impact ◽

The City

Due to excessive rainfall in June of 2013, several rivers located in and near the City of Calgary, Canada experienced significant flooding events. These events caused severe damage to infrastructure throughout the city, precipitating a renewed interest in flood control and mitigation strategies for the area. A major potential strategy involves partial diversion of Elbow River flood water to the proposed Springbank Off-Stream Storage Reservoir. A large scale physical model study was conducted to optimize and validate the design of a portion of the new project. The goals of the physical model were to investigate diversion system behaviors such as flow rates, water levels, sediment transport and, debris accumulation, and optimize the design of new flow control structures to be constructed on the Elbow River. In order to accurately represent the behavior of debris within the system due to flooding, large woody debris created from natural sources was utilized in the physical model and its performance was compared to that of debris of the same size fabricated from pressed cylindrical wood dowels. In addition to comparing the performance of these two debris types, the impact of root wads on debris damming was also investigated. Significant differences in damming behavior was shown to exist between the natural debris and the fabricated debris, while the impact of root wad on damming affected the dam structure and formation. The results of this experiment indicate that natural debris is preferred for studies involving debris accumulation.

Download Full-text

Evaluation of Different Simulation Methods for Analyzing Flood Scenarios in the Danube Delta

Applied Sciences ◽

10.3390/app10238327 ◽

2020 ◽

Vol 10 (23) ◽

pp. 8327

Author(s):

Alexandru Banescu ◽

Maxim Arseni ◽

Lucian Puiu Georgescu ◽

Eugen Rusu ◽

Catalina Iticescu

Keyword(s):

Flood Control ◽

Dynamic Method ◽

Static Method ◽

Water Levels ◽

The Black Sea ◽

General Interest ◽

Danube Delta ◽

Simulation Accuracy ◽

Discharge Area ◽

Investment Promotion

The present work is focused on the analysis of flood scenarios for the settlements near the Danube discharge area into the Black Sea. From this perspective, the aim of the research is the development of flood extension maps for localities in the Danube Delta. The emphasis is on collecting the data and information needed for the entire analysis process, such as hydrological data on Danube flows and water levels (which were analyzed for 51 years), topo-bathymetric data (where 1685 cross sections were processed, measured on an 87-km section of the Danube), a digital terrain model (DTM), and others. Two methods of flood scenario analysis for the localities targeted were used in this paper. The first method was an analysis of the flood scenarios by modeling a real scenario, where it was supposed that a 20 m breach appeared in the dam which protects the localities and remained present for 24 h. The second method consisted of a Geographic Information System (GIS) analysis (static from a hydraulic point of view), where the maximum water level was superimposed over the DTM. This corresponded to a scenario in which the breach in the flood-control levee remains present for a longer period. The validated results show that the dynamic method is more efficient than the static method, both in terms of estimated flooded surfaces and in terms of simulation accuracy (taking into account more input parameters than the static method). Thus, from the obtained simulations it was observed that applying the dynamic method resulted in smaller flooded surfaces in the settlements analyzed than when considering the static method. In some cases, the differences between the flooded surfaces reached up to about 22%. This information is important and of general interest since it can be used in various fields of work, such as flood defense strategies, and investment promotion activities in the Danube discharge area or similar locations.

Download Full-text

Climate adaptive urban planning and design with water in Dutch polders

Water Science & Technology ◽

10.2166/wst.2011.688 ◽

2011 ◽

Vol 64 (3) ◽

pp. 722-730 ◽

Cited By ~ 6

Author(s):

T. Schuetze ◽

L. Chelleri

Keyword(s):

Water Policy ◽

Flood Control ◽

Water Systems ◽

Water Levels ◽

Management Systems ◽

Polluted Water ◽

Local Climate ◽

Planning And Design ◽

Urban Planning And Design ◽

Rainwater Management

The existing water management in Dutch polders is based on independent water systems for each polder. These are featuring artificial stabilized ground and surface water levels. As a result of the local climate the water levels in the polders are not continuously at a constant level. To maintain a stable water table in the polders, the surplus of relatively clean rainwater has to be pumped away during the cold seasons into canals or rivers, which are located on a higher level. During the summer relatively polluted water from these waterways is led into the polders to top up the declining water levels. This procedure leads to various problems regarding water quantity and water quality. The described existing system is not adaptable to climate change and includes the risk of flooding, particularly from torrential rain. Therefore it is crucial to develop, preferably self-sufficient, rainwater management systems in the polders. They should allow the fluctuation of the water levels inside the polders for seasonal storage and flood control. The described concept is adopted in the present water policy in the Netherlands as well as in research and recent urban development projects in Dutch polders.

Download Full-text

Water levels shape fishing participation in flood-control reservoirs

Lake and Reservoir Management ◽

10.1080/10402381.2013.775200 ◽

2013 ◽

Vol 29 (1) ◽

pp. 82-86 ◽

Cited By ~ 3

Author(s):

L. E. Miranda ◽

K. O. Meals

Keyword(s):

Flood Control ◽

Water Levels

Download Full-text

Identification of Scouring Zones in Ungauged River by Simulation: The Case of Galal Badrah River, Iraq

Association of Arab Universities Journal of Engineering Sciences ◽

10.33261/jaaru.2019.26.3.007 ◽

2019 ◽

Vol 26 (3) ◽

pp. 57-67

Author(s):

Kareem Abd Ali Kareem ◽

Hayder A.K. AL-Thamiry

Keyword(s):

Flood Control ◽

Water Levels ◽

Border Crossing ◽

Roughness Coefficient ◽

River Bank ◽

Maximum Discharge ◽

The Right ◽

Seasonally Flooded ◽

And Storage ◽

River Cross Section

Galal Badrah River is one of Iraqi-Iranian border crossing rivers. This river is usually seasonally flooded during any time started from January to May. Its maximum discharge is 2200 m3/s which was recorded during 1985. During floods, banks of this river at many locations need protection against scour problem during floods. A small dam was constructed on this river in 2010 for the purposes of flood control and storage of water. The weir of the dam has a design discharge of 1250 m3/s. Sediments started to accumulate in the reservoir of the dam that reduce its design capacity to 10% during 2017. The flow of Galal Badrah River was simulated by using HEC-RAS 5.0.3 models. were used to simulate by using. Two hydrographs were used at upstream side of the river, one with a maximum discharge of 1250 m3/s and the other is of 2200 m3/s. A normal flow depth is used as a downstream boundary condition. Results of the simulation showed that the velocities to be higher than allowable velocity of scouring. The protection of Galal Badrah river by stack boulders is suggested to be used to avoid the scour at the river bank. The protection will increase Manning’s roughness coefficient from 0.028 to 0.10. The percentage of reduction in velocities after the river protection for the discharges of 1250 and 2200 m3/s were found to be 65.23% and 60.55%, respectively. The reduction in velocity caused increase in the river water levels. As a result, a flood embankment is required to be constructed on the right bank of the river with a height ranges from 2.5 to 5.6 m depending on the water depth at river cross section.

Download Full-text