Design of Storm Water Drainage System in A Metropolitan Area (original) (raw)
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IJERT-Design of Storm Water Drainage System in A Metropolitan Area
International Journal of Engineering Research and Technology (IJERT), 2020
https://www.ijert.org/design-of-storm-water-drainage-system-in-a-metropolitan-area https://www.ijert.org/research/design-of-storm-water-drainage-system-in-a-metropolitan-area-IJERTV9IS060757.pdf A scientific drainage system to catch the storm water is a long term need of the society, particularly in cities. Urbanization along with its impermeable structures is one of the major causes of flooding in metropolitan areas. The rainfall intensity and characteristics of catchment area are the major factors for designing metropolitan storm water drainage facilities. These facilitates have a uppermost advantage to safely dispose the generated floods to receiving system. Many towns lack in providing proper drainage system. The present design helps the rainfall in design storm water drainage system. Past record of 34 years rainfall data has been taken for study. Various methods were reported in literature for runoff estimation. In the present study, rational method has been used for estimation of storm water runoff which is widely reported in literature. The present study is to estimate runoff of a drainage basin and also to design as a case study for Navrangpura Area in Ahmedabad, Gujarat where the design is based on different velocities .
Efficient Storm water network is the main tool to prevent the water gatheration and scattering of a city. Selecting the Bharkawada as study area and its problem was identified to be of very less effective drainage system. In this study methods have been adopted to identify the possibilities of completing the research for designing the storm water drainage design. Our main aim is to design a very efficient and rpid drainage system which should drain the water very fastly with less concentration time and less spreading of water with less provision of slope. The present design is based on rainfall data. Past 30 years rainfall data has been taken for study. The system has been designed considering in total of 65% of the impervious area. Estimated rainfall intensity has been calculated as 33.02527 mm/hour with a recurrence interval of 2 years from the detailed analysis of rainfall data of 34 years. Rainfall Intensity is estimated after frequency analysis of the rainfall data. The calculated runoff is 25.056 m3/s, which can be used as a design discharge for network designing. Different methods can be used for runoff estimation. Here, Rational method seems to be best for use in estimation of storm water runoff. The outfalls of system are directed to proposed lakes. Ere at this stage rainfall calculations have been done and in future work complete rainfall and runoff analysis will be carried out for storm water network.
Performance Assessment of Storm Water Drainage System by Stormwater Management Model
As urban population numbers increase, it is evident that urbanization areas continue to expand. This expansion of urban areas mainly changes the natural land surface to the artificial landscape. The urban landscape is partly impervious, and it will decrease infiltration and in reverse increase the volume of surface runoff which causes several destructions in the town. Thus, the study was to assess the performance of the stormwater drainage system of Ambo town. The data have been used for this study were both spatial and temporal data. Rainfall data for 1987 to 2018 years and digital elevation models, land use, and soil data were used. Additionally, canal dimensions and sub-catchment data were also used. For this study, SWMM for simulating rainfall-runoff, the water level in the junctions, and flow depth in the canal were used. ARC-GIS was used to obtain spatial information and delineate the catchment of the study area. Intensity duration frequency curves of Ambo were developed using...
Simulation of Drainage System Using Storm Water Management Model (SWMM 5.1
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
Urban flood is one of the major problems in Guwahati city at present. The topography of the city is such that rainwater cannot drain out easily from the city. With rapid growth of the city, along with people cutting and constructing houses in the surrounding hills, result in high sediment yield from the immediate upper catchment, adding another dimension to this problem. The need for a proper storm water disposal drainage system is at prime in Guwahati. Therefore innovative planning and efficient design of the drainage network is necessary. An effort has been made to study finer details of the area by investigating drainage systems of various parts of the city. The existing drainage channel is studied and simulated using SWMM 5.1 modeling software. The model is simulated for rainfall of two-year return period of interval one-hour design storm intensity. Frequency analysis is performed using best fitted distribution i.e., Gumbel's distribution for different return periods and the frequency values are used for development of IDF (intensity-duration-frequency) curves. The city is divided into major flood prone areas according to ASDMA and then modeling is done with respect to different return period of rainfall. From simulation it is found that the existing drainage of the city is not efficient to drain out the storm-water completely, the primary cause of urban flood in Guwahati city.
A Hydrological Urban Drainage Model and Its Application – a Case Study
2018
Now a days, water-logging due to excessive rainfall is becoming more serious in urban areas making it necessary to urgently assess and redesign the existing draiage facilities to drain out the storm water more efficiently. In this study, a hydrologic urban drainage model is developed by combining Horton’s equation for the estimation of runoff losses and Manning’s equation for flow through drains to relate the rainfall-runoff respons. The existing drainage facilities for a typical urban catchment, Ward No. 22 in Khulna City Corporation of Bangladesh are studied, analyzed. To analyze the drainage characteristics efficiently, the study area is subdivided into 8 sub-catchments. It is found that the existing drainage facilities are not adequate for the study area and the water logging condition will be happend if a rainfall intensity is equalled or exceed 1.2 in/hr irrespective of the rainfall duration, no water logging condition will be occured below this level. It is concluded that the...
Climate change will affect water resources through its impact on the quantity, variability, timing, formation and intensity of precipitation. Improved management of storm water is critical, if addressed inadequately, it will jeopardize progress of poverty reduction targets and sustainable development in all economic, social and environmental dimensions. The purpose of this drainage study is to assess the present drainage situation, identify the future requirements and suggest improvement of the drainage network system to provide the Municipality a area free from water congestion within an acceptable environmental condition. Integrated study of drainage dynamics in consideration of gravity flow for the proposed drainage improvement system is made by developing rainfall-runoff model and analytical computation for the urbanized area. The overall planning processes are conjugated with rigorous study of infrastructure, Digital Elevation Model (DEM), land-use and sattelite image using GIS for a preliminary conceptual understanding of the Municipality system; identification of rivers/khals* surrounding the Municipality and collection of data to understand the hydrological response of the Municipality; assessment of effective range of land levels which would be considered for planning process; making of intensive field visit for identification of possible outfalls and drainage routes in verification of the preceding planning processes; planning of drains & zones with scrutinized outfall locations; and finally storm runoff assessment using empirical formula. Modelling approach is used to generate catchment runoffs which are calibrated against flows using empirical formula known as modified rational formula for respective design year.
A Review of Recent Studies on Urban Stormwater Drainage System for Urban Flood Management
2020
Stormwater drainage and urban flooding are the popular issues in policy agendas and academia. Although the research on these title increases steadily an integrated review on stormwater drainage and urban flood with a focus on pluvial flooding has yet to be produced. This paper presents a critical review on stormwater drainage and urban flood based on 78 selected journal papers published over the period of 1990 to 2018. The review focus on pluvial flooding to relate urban stormwater drainage management and urban flood disaster management and to show the links between the two. The methods taken to manage urban stormwater drainage and urban flooding as well as the complexity of achieving a comprehensive urban flood disaster management are evaluated and discussed. To better understand the concepts behind urban flood and improve the urban flood risk management strategies, recommendation of future research directions are also provided.
Simulation of Urban Drainage System Using a Storm Water Management Model (SWMM)
Asian Journal of Engineering and Applied Technology
Urban floods are caused due to increase in population density, development of urban infrastructure without paying due consideration to drainage aspects and increase in paved surfaces. Storm water modelling plays an important role in checking issues such as flash floods and urban water-quality problems. The SWMM (Storm Water Management Model) has been an effective tool for simulating floods in urban areas. In this study a SWMM model is developed to analyze drainage network for the campus of National Institute of Technology, Warangal in the city of Warangal, Telangana, India. The model is simulated for one real storm event and 2-year return period of interval 1-hour design storm intensity. Frequency analysis is performed using best fitted distribution i.e., Gumbel’s distribution for different return periods and the frequency values are used for development of IDF (intensity-duration-frequency) curves. Design storm intensity derived from IDF curves for different return periods is used ...
IRJET, 2021
An established drainage system to collect the running storm water is a long term ambition of the society, especially in cities. The presence of excess water within a roadway adversely affects the engineering properties of materials with which it is constructed. When it rains, a part of the rain water flows on the surface while a part of it percolates through the soil mass to reach the ground water. It is very much required that the surface water from the carriage way and shoulder should effectively be drained off from the land without allowing it to percolate to sub-grade. Also the surface water from adjoining land should not enter into the road way. The side drains in roadway should have sufficient capacity and longitudinal slope to carry away all the surface water. Thus there is the need to evaluate the hydraulic performance of the system and determine the system efficiency. The analysis is conducted on Shanmugham road area of Cochin City in Kerala, India where the excess runoff is really a threat to the area. Most of the existing storm water drains in this area are in a worst stage and not working properly with no proper maintenance. This study is mainly focused on the storm water drainage design based on hydrological analysis which includes the calculation of peak runoff by Rational Method and the slope calculation by Manning's Formula.
Utilization of Storm Water Management Model for Urban Flood Scenario
Blue Eyes Intelligence Engineering and Sciences Publication, 2020
Majors cities in India have witnessed huge floods from past few decades. Due to rapid population growth and improper urban planning the chances of creek, localised or flash urban floods have drastically increased. Climatic changes are also a key reason for heavy rainfall that increases the flood volume and depth in a catchment. Modelling of Storm water plays a key role in estimating flood runoff quantity and quality. To check these issues SWMM is used to simulate floods scenario in Urban areas. This hydrological study is carried out to simulate and understand the rainfall runoff characteristics of the study area by using SWMM. It is an effective tool used for simulating flash floods and runoff in urban areas. In this study catchments have been subdivided into 14 parts and modelled for year 2017 rainfall events of 1-hr interval. The present study area is evaluated by importing AutoCAD map of the area in SWMM. Further Rainfall Data is imported as time series in the model. The results depict that the Runoff for the Sub catchments of S1, S2, S3, S9, S13 blocks are maximum. The study states that no nodes are flooded and also no overflow sections. Thus, the selected study area storm network system has been well planned and has enough carrying capacity to carry the simulated rainfall for a prolonged duration.