Modelling and Simulation of Open Drainage Systems

2013 ◽  
Vol 373-375 ◽  
pp. 427-430
Author(s):  
Li Hui Cen ◽  
Hong Lin Zhu
Keyword(s):  
Parameter Identification ◽  
Drainage System ◽  
Modelling And Simulation ◽  
Rainfall Data ◽  
Open Drainage ◽  
Simplified Models ◽  
Drainage Systems ◽  
Identification Method ◽  
Duke University

This paper proposed a parameter identification method for simplified models of open drainage systems. SWMM is used to identify these parameters by taking the rainfall data as the input. Simulations show that the results of the proposed method have high accordance with those of SWMM. The drainage system of Duke University is taken as an example to demonstrate our approach.

scholarly journals Repairing earth dam drainage systems

Vestnik MGSU ◽  
2019 ◽  
pp. 901-911
Author(s):  
Denis A. Krutov
Keyword(s):  
Reinforced Concrete ◽  
Drainage System ◽  
Hydroelectric Power Plant ◽  
Earth Dam ◽  
Design Solution ◽  
Filtration Flow ◽  
Hydroelectric Power ◽  
Drainage Channel ◽  
Open Drainage ◽  
Drainage Systems

Introduction: when reconstructing or overhauling dams, great attention should be paid to drainage systems as the most critical components of the installations. The article describes the typical malfunctions of earth dam pipe drainages. The research considers geological and hydrogeological features that were not taken into account when developing projects. Materials and methods: control and measuring instrumentation (piezometer network), full-scale experiments on disabling pipe drainage and mathematical modelling were used as the filtration regime research methods. Results: analysis of the hydrogeological features of the base of the right-bank floodplain dam of the Nizhegorodskaya hydroelectric power plant and field filtration observations revealed a strong drainage effect of the base on the filtration flow at several areas of the dam body. At the other areas, a high groundwater level position at the dam downstream and its outlet into the pipe drainage at the downstream were recorded. Substantiated by filtration calculations, the proposed repair of the drainage system consisted in designing open drainage along the dam axis and backfilling the territory at the downstream by 2.0 m that excludes impoundment of the territory without the pipe drainage. Conclusions: the following engineering solutions can be recommended for repairing earth dam drainage systems: construction of backfill drainage trenches in the dam downstream, new pipe drainage at higher elevations or an open drainage channel in solid reinforced concrete arranged along the axis of the dam. The proposed version of the pipe drainage repair provides for constructing an open drainage channel in solid reinforced concrete on a reverse filter with an arrangement of gravel-filled asbestos-cement pipes in the dam slopes and bottom. Such a design solution allows repairing the drainage system without dewatering and, if necessary, completely refusing the existing pipe drainage.

scholarly journals Environmental Regimes of Drained Soils of the Novgorod Region

2020 ◽  
Author(s):  
Olga Balun ◽  
Lyudmila Tiranova
Keyword(s):  
Subsurface Layer ◽  
Drainage System ◽  
Drainage Network ◽  
Open Drainage ◽  
Mineral Salts ◽  
Drainage Systems ◽  
Closed Drainage ◽  
Significant Difference ◽  
Subsurface Layers ◽  
Reclamation System

Under the influence of drainage, new ecological regimes of groundwater and soil moisture are formed, which in turn form new nutrient regimes. The objects of this study are the ecological regimes of lands reclaimed in different ways: by an open drainage network (with the use of runoff hollows) and a closed drainage network. Experimental plots are located in the Novgorod region on sod-podzolic soil. The efficiency of the reclamation system is determined by the groundwater regime. The results of the research prove that the regime of groundwater in closed drainage systems is more favorable compared to the open drainage system. The analysis of the nutrient regime of drained soils showed a decrease in agrochemical indicators due to the removal of minerals by runoff. More mineral salts are washed away in closed drainage (up to 711 kg/ha). Considering the agrochemical composition of the soil, calcium ions are removed most intensively from sod-podzolic soils. The water-physical properties of the drained lands, such as density, porosity and moisture content, have also changed. The study of water-air regimes of reclaimed soils revealed a significant difference in the degree of moisture of the plow and subsurface layers when implementing either one or different methods of drainage. A more favorable water-air regime is created by closed drainage systems in the subsurface layer, and by open drainage systems – in the plow layer.

scholarly journals Hydraulic calculation of horizontal open drainages

2019 ◽  
Vol 97 ◽  
pp. 05039 ◽  
Author(s):  
Aybek Arifjanov ◽  
Maqsud Otaxonov ◽  
Luqmon Samiev ◽  
Shamshodbek Akmalov
Keyword(s):  
Flow Velocity ◽  
Drainage System ◽  
Soil Condition ◽  
Drainage Water ◽  
Hydraulic Calculation ◽  
Good Effect ◽  
Deep Drainage ◽  
Open Drainage ◽  
Drainage Systems ◽  
Motion Mode

In article analysed the factors influencing the hydraulic processes which arise in the open horizontal drainage systems. Open drainages plays important role in order to improve the ameliorative condition of the agricultural area, salt washing on the soil. It is emphasized that the deep drainage in our region has a good effect on the soil condition and salt removing. At present, efforts are being made to improve the productivity of the collectors to clean and built. As example the collector drainage systems in Syrdarya region are listed. It is observed that the motion mode of open drainage flows is physically identical. Due to the complexity of equations in the unstable motion mode, the drainage water flow scheme in the collectors reflects the hydraulic calculation of the movement. Researches were provided in open agricultural drainage system of Syrdarya region and analysis have been done in natural field conditions. It has been noted when slope of the drainage bed is equal to i<0,0005 intensity of deformation were very high, when slope was between 0,0005<i<0,0011 intensity of deformation of collector bed was equal to the minimum level. In this article provided hydraulic calculation for Syrdarya region drainage system for choosing dynamical stable shape of bed. Those hydraulic calculations and projections ensure collectors with long time period of exploitation condition. Calculation and analyses were done with taking account trapezoidal capacity of the stream in drainage system, and the results of studies on increasing the flow efficiency are reflected. Analysed that when slope will increase until 20% discharge capacity will increase because of high average flow velocity increased by 7-8 times and discussed difference of them. As a result of the hydraulic calculation, the slope of the drainage increased from i-0,00048 to i-0,0006, the fact that the flow capacity increased by 25% due to the increase because of flow velocity.

scholarly journals Study on the Implementation of Drainage System at Universiti Tun Hussein Onn Malaysia (UTHM)

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Mohd Luqman Ismail ◽  
◽  
Sharifah Meryam Shareh Musa ◽  
Keyword(s):  
Surface Runoff ◽  
Stormwater Management ◽  
Drainage System ◽  
Structured Interviews ◽  
Urban Stormwater ◽  
Open Drainage ◽  
Runoff Water ◽  
Drainage Systems ◽  
Urban Stormwater Management ◽  
Land Drainage

Drainage systems play an important role in the development of managing surface runoff water. This is because without proper management of the drainage system, it can cause flooding in the area. Universiti Tun Hussein Onn Malaysia (UTHM) has suffered floods and caused significant losses. Therefore, the purpose of this article is to study the types of drainage systems available around the UTHM area. In this regard, semi-structured interviews were conducted with a number of respondents from the Development and Maintenance Office UTHM to study the problems of each existing drainage system around the area and to look at ways of improving the existing drainage system. The types of drainage systems available at UTHM have been identified as conventional drainage systems, Urban Stormwater Management Manual (MSMA), monsoon drainage, main drainage and land drainage. Problems such as drainage system, waste and clogged drainage also being identified. Among the improvements identified are replacing MSMA with open drainage. In conclusion, the study of drainage system implementation at UTHM can provide a clearer picture of the drainage system used around the study area.

scholarly journals Inclusion of Hydraulic Controls in Rehabilitation Models of Drainage Networks to Control Floods

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 514
Author(s):  
Leonardo Bayas-Jiménez ◽  
F. Javier Martínez-Solano ◽  
Pedro L. Iglesias-Rey ◽  
Daniel Mora-Melia ◽  
Vicente S. Fuertes-Miquel
Keyword(s):  
Genetic Algorithm ◽  
Drainage System ◽  
Optimal Solution ◽  
Hydraulic Control ◽  
Drainage Systems ◽  
Storm Water Management Model ◽  
Drainage Networks ◽  
Extreme Rain ◽  
Rain Events ◽  
The Cost

A problem for drainage systems managers is the increase in extreme rain events that are increasing in various parts of the world. Their occurrence produces hydraulic overload in the drainage system and consequently floods. Adapting the existing infrastructure to be able to receive extreme rains without generating consequences for cities’ inhabitants has become a necessity. This research shows a new way to improve drainage systems with minimal investment costs, using for this purpose a novel methodology that considers the inclusion of hydraulic control elements in the network, the installation of storm tanks and the replacement of pipes. The presented methodology uses the Storm Water Management Model for the hydraulic analysis of the network and a modified Genetic Algorithm to optimize the network. In this algorithm, called the Pseudo-Genetic Algorithm, the coding of the chromosomes is integral and has been used in previous studies of hydraulic optimization. This work evaluates the cost of the required infrastructure and the damage caused by floods to find the optimal solution. The main conclusion of this study is that the inclusion of hydraulic controls can reduce the cost of network rehabilitation and decrease flood levels.

scholarly journals Parameter identification method of hydraulic automatic gauge control system based on chaotic wolf pack optimization algorithm

AIP Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 055302
Author(s):  
Yong Zhu ◽  
Guangpeng Li ◽  
Shengnan Tang ◽  
Wanlu Jiang ◽  
Zhijian Zheng
Keyword(s):  
Control System ◽  
Parameter Identification ◽  
Optimization Algorithm ◽  
Identification Method ◽  
Automatic Gauge Control

scholarly journals The Relevance of Grated Inlets within Surface Drainage Systems in the Field of Urban Flood Resilience. A Review of Several Experimental and Numerical Simulation Approaches

2021 ◽  
Vol 13 (13) ◽  
pp. 7189
Author(s):  
Beniamino Russo ◽  
Manuel Gómez Valentín ◽  
Jackson Tellez-Álvarez
Keyword(s):  
Overland Flow ◽  
Drainage System ◽  
Critical Conditions ◽  
Hydraulic Efficiency ◽  
Storm Events ◽  
Urban Resilience ◽  
Urban Flood ◽  
Drainage Systems ◽  
Surface Drainage ◽  
Intense Storm

Urban drainage networks should be designed and operated preferably under open channel flow conditions without flux return, backwater, or overflows. In the case of extreme storm events, urban pluvial flooding is generated by the excess of surface runoff that could not be conveyed by pressurized sewer pipes, due to its limited capacity or, many times, due to the poor efficiency of surface drainage systems to collect uncontrolled overland flow. Generally, the hydraulic design of sewer systems is addressed more for underground networks, neglecting the surface drainage system, although inadequate inlet spacings and locations can cause dangerous flooding with relevant socio-economic impacts and the interruption of critical services and urban activities. Several experimental and numerical studies carried out at the Technical University of Catalonia (UPC) and other research institutions demonstrated that the hydraulic efficiency of inlets can be very low under critical conditions (e.g., high circulating overland flow on steep areas). In these cases, the hydraulic efficiency of conventional grated inlets and continuous transverse elements can be around 10–20%. Their hydraulic capacity, expressed in terms of discharge coefficients, shows the same criticism with values quite far from those that are usually used in several project practice phases. The grate clogging phenomenon and more intense storm events produced by climate change could further reduce the inlets’ performance. In this context, in order to improve the flood urban resilience of our cities, the relevance of the hydraulic behavior of surface drainage systems is clear.

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