By M. Javaid

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11,. 4–9. P. Y. Yue, (2003) Dating fluvial sediments by optically stimulated luminescence: selection of equivalent doses for age calculation. Quaternary Science Reviews, 22 . 1123–1129 2 Sustainable Drainage Systems: An Integrated Approach, Combining Hydraulic Engineering Design, Urban Land Control and River Revitalisation Aspects Marcelo Gomes Miguez, Aline Pires Veról and Paulo Roberto Ferreira Carneiro Federal University of Rio de Janeiro Brazil 1. Introduction Floods are natural and seasonal phenomena, which play an important environmental role, but when they take place at the built environments, many losses of different kinds occur.

In this context, preventing urban land to be heavily impervious is one of the major goals. Minimising impacts on the urban water cycle is of fundamental importance. The development project must comply with natural hydrological aspects or provide compensatory measures for urbanisation changes. The watershed, as a complex and integrated system has to be considered as a whole, not only in physical terms. This must be the unit of planning and design. The documents that integrate urban development and the strategies for a sustainable drainage system, and, therefore, a sustainable city, are the Urban Development Master Plan and The Urban Stormwaters Master Plan.

Moreover, these new trends add concerns of water quality control, as well as enhance rainwater as a resource to be exploited in an integrated approach for sustainable management of urban stormwaters. Besides, the possibility of combining flood control measures with urban landscape interventions, capable to add value to urban spaces, with multiple functions, is becoming an interesting option from the point of view of revitalising degraded areas, as well as optimising the available resources for public investments.

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