Urban Agglomeration and Supporting Capacity: The Role of Open Spaces within Urban Drainage Systems as a Structuring Condition for Urban Growth

Abstract

Urbanisation greatly changes the natural environment-city growth may cause urban sprawl, increasing land consumption and infrastructure demands, with consequent built and natural environments degradation. To face this challenge, the supporting capacity of the natural environment needs to be addressed in the urban planning process. This chapter will particularly discuss urban drainage role in the planning context, integrating engineering, urbanism and landscaping in order to set the basic conditions towards a sustainable city development. Urban drainage systems (and the related urban rivers) play a crucial role in city planning, once it intermediates the needs of the built environment, providing safe areas free from flooding, and the demands of the natural environment, giving space and passage to floods. This particular feature gives to the drainage system a spatial structuring characteristic and it provides opportunities to revitalise city areas, improving biodiversity and recovering environmental values. On the other side, a city open spaces system is the main reserve of urban areas for sustainable urban drainage interventions. The adequate land use planning and consequent management of these open spaces shall be in the core discussion to produce integrated and functional solutions for built and natural environments.

Studi Kasus Sistem Drainase Yang Berwawasan Lingkungan Di Kota Bandar Lampung

“…Sistem drainase yang baik, akan mengurangi kemungkinan banjir dan genangan air di perkotaan yang padat penduduk, yang merupakan permasalahan rutin yang belum juga terselesaikan dan menjadi masalah yang melibatkan banyak pihak [5] . Oleh karena itu perlu dilakukan upaya perencanaan suatu sistem drainase yang mempertimbangkan kelestarian lingkungan sekitar dengan cara perbaikan kualitas lingkungan permukiman yang padat penduduk [6] dengan pembuatan SRAH, pelestarian daerah resapan air dan IPAL. Tujuan penelitian ini adalah untuk menghitung dan menganalisis pengurangan debit banjir setelah dibangunnya sumur resapan dan kolam retensi, dengan melakukan kajian (studi kasus di Jl.…”

The Spatial Distribution Characteristics of Carbon Emissions at County Level in the Harbin–Changchun Urban Agglomeration

“…On the other hand, the planning and rapid development of urban agglomerations have made it even more difficult for China to reduce carbon emissions [13][14][15]. From the definition in Geography, urban agglomeration is an "aggregate" of cities within certain geographic areas [16]. Within an urban agglomeration, the central city is the core aggregation point of its economy, culture, technology, and transportation.…”

River Restoration Integrated with Sustainable Urban Water Management for Resilient Cities

“…Urban river restoration, although usually limited by the heavy modifications introduced in the urban watershed, has the potential to improve the environmental quality of the river and provide opportunities for urban revitalization [19,21]. However, it is necessary to integrate this approach with distributed actions in the watershed to recover hydrological functions that were modified by the urbanization process itself [27]. This combination offers integration of measures on the watershed scale and the local fluvial space scale, reducing the risk of flooding and probably increasing the resilience of the city [28].…”

“…This result favors river restoration by recovering the functional effects of the original pre-urban hydrology that used to give support to the original fluvial processes. The use of the city's open spaces can also be the catalyst for this integration between sustainable urban drainage and river restoration [27]. These spaces can be used in multifunctional landscape arrangements, acting in the urban revitalization and providing urban and ecosystem services, while also controlling the potential of degradation previously introduced by recurrent floods [27].…”

“…The use of the city's open spaces can also be the catalyst for this integration between sustainable urban drainage and river restoration [27]. These spaces can be used in multifunctional landscape arrangements, acting in the urban revitalization and providing urban and ecosystem services, while also controlling the potential of degradation previously introduced by recurrent floods [27]. Besides that, open spaces are related to the construction of resilient cities, providing benefits for urban performance, not only under normal conditions but also in disaster events [29], such as floods.…”