Numerical simulation of flood control and drainage and water environment improvement project in Shangyu

2021 ◽  
Author(s):  
Ying Li ◽  
Qi Liu ◽  
Enshang Yang
Keyword(s):  
Numerical Simulation ◽  
Flood Control ◽  
Water Environment ◽  
Improvement Project

scholarly journals The model and simulation of low impact development of the sponge airport, China

2019 ◽  
Vol 20 (2) ◽  
pp. 383-394 ◽  
Author(s):  
Jing Peng ◽  
Jiayi Ouyang ◽  
Lei Yu ◽  
Xinchen Wu
Keyword(s):  
Flood Control ◽  
Low Impact Development ◽  
Water Environment ◽  
Drainage System ◽  
Practical Significance ◽  
International Airport ◽  
Model And Simulation ◽  
Impervious Area ◽  
Before And After ◽  
Airport Runway

Abstract Recently urban waterlogging problems have become more and more serious, and the construction of an airport runway makes the impervious area of the airport high, which leads to the deterioration of the water environment and frequent waterlogging disasters. It is of great significance to design and construct the sponge airport with low impact development (LID) facilities. In this paper, we take catchment N1 of Beijing Daxing International Airport as a case study. The LID facilities are designed and the runoff process of a heavy rainfall in catchment N1 is simulated before and after the implementation of LID facilities. The results show that the total amount of surface runoff, the number of overflow junctions and full-flow conduits of the rainwater drainage system in catchment N1 of Beijing Daxing International Airport are significantly reduced after the implementation of the LID facilities. Therefore, the application of LID facilities has greatly improved the ability of the airport to remove rainwater and effectively alleviated the risk of waterlogging in the airport flight area. This study provides theoretical support for airport designers and managers to solve flood control and rainwater drainage problems and has vital practical significance.

scholarly journals Numerical Simulation Study of Booming Effect in Fast Currents of Inland River

2018 ◽  
Vol 38 ◽  
pp. 03048
Author(s):  
Rongchang Chen ◽  
Chen Liu ◽  
Xiaofeng Luo ◽  
Wei Shen
Keyword(s):  
Numerical Simulation ◽  
Environmental Conditions ◽  
Yangtze River ◽  
Flood Control ◽  
Peak Flow ◽  
Control Design ◽  
Simulation Method ◽  
Design Flow ◽  
The Yangtze River ◽  
Annual Average

In the downstream tidal section of the Yangtze River, nine kinds of combinations of hydrological environmental conditions are considered, including the annual average runoff flow, the annual average peak flow and the flood control design flow, as well as the three conditions of spring, medium and neap tides. By means of the numerical simulation method, the effective performance parameter values for conventional intercepting boom under different environmental conditions are obtained by simulating 9 kinds of maximum current speed to withstand, Max.CS, respectively. The results show that, in the downstream fast current tidal section of the Yangtze River, for the boom performance index of Max.CS, the relatively extensive applicability value should be 3.0kn under the condition of the annual average runoff flow; 4.0Kn should be selected under the condition of the annual average peak flow; and 4.5Kn should be selected under the flood control design flow. This study can provide technical support for the design, selection and use of booms in downstream waters of the Yangtze River.

scholarly journals Research on Water Environment Regulation of Artificial Playground Lake Interconnected Yangtze River

2018 ◽  
Vol 15 (10) ◽  
pp. 2110 ◽  
Author(s):  
Weiwei Song ◽  
Xingqian Fu ◽  
Yong Pang ◽  
Dahao Song ◽  
Qing Xu ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Level ◽  
Yangtze River ◽  
Flood Control ◽  
Numerical Models ◽  
Rapid Development ◽  
Control Level ◽  
Water Environment ◽  
Water Diversion ◽  
Coupled Models

With the rapid development of China, water pollution is still a serious problem despite implementation of control measures. Reasonable water environment management measures are very important for improving water quality and controlling eutrophication. In this study, the coupled models of hydrodynamics, water quality, and eutrophication were used to predict artificial Playground Lake water quality in the Zhenjiang, China. Recommended “unilateral” and “bilateral” river numerical models were constructed to simulate the water quality in the Playground Lake without or with water diversion by pump, sluice and push pump. Under “unilateral” and “bilateral” river layouts, total nitrogen and total phosphorus meet the landscape water requirement through water diversion. Tourist season in spring and summer and its suitable temperature result in heavier eutrophication, while winter is lighter. Under pumping condition, water quality and eutrophication of “unilateral” river is better than “bilateral” rivers. Under sluice diversion, the central landscape lake of “unilateral river” is not smooth, and water quality and eutrophication is inferior to the “bilateral”. When the water level exceeds the flood control level (4.1 m), priority 1 is launched to discharge water from the Playground Lake. During operation of playground, when water level is less than the minimum level (3.3 m), priority 2 is turned on for pumping diversion or sluice diversion to Playground Lake. After opening the Yangtze river diversion channel sluice, priority 3 is launched for sluice diversion to the Playground Lake. When the temperature is less than 15 °C, from 15 °C to 25 °C and higher than 25 °C, the water quality can be maintained for 15 days, 10 days and 7 days, respectively. Corresponding to the conditions of different priority levels, reasonable choices of scheduling measures under different conditions to improve the water quality and control eutrophication of the Playground Lake. This article is relevant for the environmental management of the artificial Playground Lake, and similar lakes elsewhere.

scholarly journals Community Satisfaction of the Urban Flood Control System Improvement Project (UFCSI)

2019 ◽  
Vol 1 (1) ◽  
pp. 29-34
Author(s):  
Mohammad Sofyan
Keyword(s):  
Community Involvement ◽  
Flood Control ◽  
City Government ◽  
Public Works ◽  
Project Implementation ◽  
Community Satisfaction ◽  
Urban Flood ◽  
Improvement Project ◽  
Land Clearing ◽  
The City

The purpose of this study is to encourage ownership, responsibility and to develop stakeholders and policy makers for the river normalization program in the pre-construction, construction and post-construction stages. The use of the IPA method to measure community satisfaction in the quadrants on the Importance Performance Matrix map. The results of the study showed that the socialization from the Department of Water and Public Works, when the project was finished, was not in line with community expectations. Flood control projects that have been built, coordination with the contractor at the time of project implementation, socialization from the city government prior to project implementation, socialization from the city government when the project is finished, socialization from the river hall at the time before project implementation, socialization from the river hall at the time the project was completed, dissemination of information from the irrigation service prior to project implementation, and community involvement in project implementation. The process of land clearing, and the price agreement that has been reached. Improved land clearing, and price agreements that have been reached can be reconsidered because their impact on the benefits felt by the community is very small.

scholarly journals Numerical Simulation of the Effects on Low Temperature Drainage from LNG on the Ocean Water Environment

2017 ◽  
Vol 05 (03) ◽  
pp. 71-80
Author(s):  
Mingyuan Sun ◽  
Yi Zhang ◽  
Longxi Han ◽  
Bo Chen ◽  
Tiantian Liu
Keyword(s):  
Numerical Simulation ◽  
Low Temperature ◽  
Water Environment ◽  
Ocean Water

scholarly journals The Application of Sheet Steel Piles Combined with Soil-Cement Piles to Stabilize a Deep Excavation Pit’s Wall

2020 ◽  
Vol 55 (4) ◽  
Author(s):  
Nguyen Anh Tuan ◽  
Nguyen Thanh Dat ◽  
Nguyen Duc Anh
Keyword(s):  
Construction Projects ◽  
Sheet Steel ◽  
Water Environment ◽  
Horizontal Displacement ◽  
Simulation Software ◽  
Deep Excavation ◽  
Improvement Project ◽  
Soil Cement ◽  
Steel Piles ◽  
City Water

In recent years, owing to advances in technology, excavation pits have shown increased improvements. Taking advantage of advanced solutions combined with traditional ones has brought about considerable advantages for construction contractors and saves on expenses to carry out construction projects. Owing to their ability to analyze geotechnical problems, several calculation and simulation software, such as Plaxis, Bentley, along with many others, have grown in popularity. Among them, Midas is one such software, which is a set of solutions developed by the MIDAS IT company and is widely applied in many constructions. The authors evaluated the ability to use Midas software to calculate the stability of a wall in a deep excavation pit for the Ho Chi Minh City Water Environment Improvement Project. The results of these researches reveal that combining soil-cement piles and sheet steel piles decreases the internal forces in sheet steel pile walls. At the same time, this solution not only reduces horizontal displacement but also keeps the settlement of the soil around the excavation pit within the permissible range, which helps to ensure that the adjacent pavements are stable and will not crack. The results of this study can be applied to similar geological constructions.

Numerical simulation of optimal deconvolution in a shallow-water environment

2001 ◽  
Vol 110 (1) ◽  
pp. 170-185 ◽  
Author(s):  
Ben S. Cazzolato ◽  
Philip Nelson ◽  
Phillip Joseph ◽  
Richard J. Brind
Keyword(s):  
Numerical Simulation ◽  
Shallow Water ◽  
Water Environment ◽  
Shallow Water Environment

Evaluation of water security: an integrated approach applied in Wuhan urban agglomeration, China

2012 ◽  
Vol 66 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Dongguo Shao ◽  
Fengshun Yang ◽  
Chun Xiao ◽  
Xuezhi Tan
Keyword(s):  
Flood Control ◽  
Evaluation Model ◽  
Water Environment ◽  
Rank Correlation ◽  
Water Security ◽  
Integrated Approach ◽  
Urban Agglomeration ◽  
State Of Water ◽  
Wuhan Urban Agglomeration ◽  
Good Agreement

To evaluate water security, the Water Resources Sustainability Evaluation Model has been developed. The model employs four criteria (economic development, flood control security, water supply security, and water environment security) and has 22 indicators, integrating them using their relative weights. The model is applied to evaluate the water security of Wuhan urban agglomeration, China. The values of the indicators are normalized using the exponential efficacy functions based on the law of diminishing marginal utility. The evaluation results show that, overall, the state of water security in Wuhan urban agglomeration is good, which is in good agreement with the true situation. The comparison between the results of the model and other three evaluation methods by the Spearman coefficient of rank correlation verifies the science and reliability of the developed model. Consequently, it is concluded that the model can be an effective tool for evaluating the states of water security and provide a basis on which to create policies for improving inadequacies in water security.

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