Using the Rational Method for Design in Complex Urban Basins | Zendy

Lars Bengtsson | Zendy; Janusz Niemczynowicz | Zendy

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Using the Rational Method for Design in Complex Urban Basins

Author(s) -

Lars Bengtsson,

Janusz Niemczynowicz

Publication year - 1998

Publication title -

hydrology research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.665

H-Index - 48

eISSN - 1996-9694

pISSN - 0029-1277

DOI - 10.2166/nh.1998.0005

Subject(s) - rational design , simplicity , flow (mathematics) , computer science , relation (database) , design methods , rational function , design flow , mathematical optimization , hydrology (agriculture) , environmental science , civil engineering , mathematics , geology , engineering , data mining , geotechnical engineering , mathematical analysis , physics , mechanical engineering , genetics , geometry , quantum mechanics , biology , embedded system

Because of its simplicity the rational method is still frequently used in urban planning and design. In this paper using the time-area method and statistically derived design storms, the design peak flow is computed for urban basins of different complexity and compared with the design flow determined from the rational method. It is shown that the design flow is underestimated using the rational method unless a reduced time of concentration is used. The relation between travel times in different parts of a drainage system is used to correct the design flow computed by the traditional rational method.

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