International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 12 | December 2024
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p-ISSN: 2395-0072
Stormwater Management of Laksam in Water-Sustainable Urban Planning: A Blue-Green Infrastructure (BGI) Network Approach Mohammed Saiful Islam Town Planner, Sreepur Municipality, Local Government Division, Ministry of Local Government, Rural Development and Cooperatives, Government of the People’s Republic of Bangladesh ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - The study aims to illustrate how urban planning
surface water bodies should be regarded as resources that can be treated and used [1]. Therefore, cost-effective conscious development of a city’s drainage system is a key component of water sustainable urban design. This involves integrating stormwater runoff and man-made drains through primary and secondary drains and natural streams. Moreover, the landscape will be designed with ecological consideration in mind so that impermeable land surfaces can be changed into permeable ones for groundwater infiltration [1]. Additionally, all of these will continue to work together as a cohesive system to prevent flooding of streets, homes, and other structures during severe storms without polluting the environment or upstream water bodies.
in Laksam Municipality, Bangladesh can be guided by a bluegreen infrastructure (BGI) network approach by considering its major drainage basins, sub-basins, and watersheds, which combines blue, green, and grey elements to provide a watersustainable urban form. The author uses a three-step approach: a spatial assessment to identify green and blue spaces, analyzing existing and potential BGI network locations to identify viable places for new blue-green corridors, and proposing a framework for a BGI network. The proposed network addresses the water dynamics and characteristics of Laksam Municipality’s watersheds, offering flood control and stormwater management options. The paper also discusses the social, spatial, environment, financial, and governance benefits and challenges for implementing BGI networks in the existing context of a local urban institution in Bangladesh. The study highlights the need for a comprehensive approach to discourse urban environmental stresses in third world cities, addressing the challenges of population growth, climate change, and uncontrollably dense urban growth.
Both natural (blue and green) and man-made (grey) features can be seen in a municipality’s landscape. Unplanned urbanization and excessive densification leave little room for interaction between blue, green, and grey elements, therefore natural features like water and green spaces as well as natural qualities like geology and terrain are given less importance in many cities [2]. As a result, a Blue-Green Infrastructure (BGI) network concept integrates hydrological and natural water management processes into systems where blue and green components appear to be superimposed. Furthermore, blue and green infrastructure combine the requirements of sustainable water and stormwater management with the requirements of urban design and urban life to strengthen urban ecosystems by introducing natural processes into artificial environments [3].
Key Words: Blue-Green Infrastructure, drainage basin, sustainable, stormwater, watershed.
1. INTRODUCTION Urban areas are frequently dependent on water since it is essential to their growth and good operation. Other than for domestic use and trash disposal, water serves a variety of roles that can also include ecological ones. The pursuit of water-sustainable urban planning is essential to achieving the objectives of SDG 6 (clean water and sanitation), SDG 11 (sustainable cities and communities), and SDG 13 (climate action) where the agendas address the quality and sustainability of water resources, which are essential to human and environmental existence. In actuality, water is a factor in several SDGs, either directly or indirectly. Hence urban planning would be oriented on achieving water conservation in this process, ensuring that all bodies of water within the municipal territory receive natural flow to their destinations and retain acceptable quality across different purposes. Wherever blue-green infrastructures are intended to include natural processes allowing for the likelihood of water logging condition, ejection of contaminants etc., the water channels must be let to run through the municipality. In principle, rainwater and other
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Consequently, such systems have favorable effects on how natural resources are used in cities (e.g., green values) besides on how users of these infrastructures feel and act (for example, social values) [3]. In actuality, a metropolitan area’s drainage system is a necessary component of its good functioning system. Many ancient civilization towns had been destroyed because their proper drainage systems were not protected. In reality, the lack of an adequate drainage and transportation system negatively impacts urban living [4]. Accordingly, drainage systems, both natural and manmade, are crucial to urban life. The river, canals, and irrigation canals comprise the area's natural drainage system. Making priority setup in terms of its individual drainage importance for a suitable future drainage plan is vital if a municipality is to ensure water-sustainable urban approach.
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