Research Article
Jul 1972
Conceptual Hydrologic Models for Urbanizing Basins
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VIEW THE REPLYAuthors: Ramachandra A. Rao, AM.ASCE, Jacques W. Delleur, M.ASCE, and Bhaskara Seshadri P. SarmaAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 98, Issue 7
Abstract
After a preliminary analysis of several conceptual models, the single linear reservoir and the Nash Model were selected for further study. Analysis of about two hundred storms from watersheds with different degrees of development indicated that the parameters of the aforementioned two models varied not only with the urbanization factor (related to the ratio of the built-up area in a watershed to the total watershed area) but also with other physiographic and meteorological factors. Regression relationships between the parameters of the models and the more significant meteorological and physiographic factors including the urbanization factor were developed. These regression relationships were used to simulate the instantaneous unit hydrographs on a watershed for various urbanization factors. Changes in runoff from a watershed with increasing urbanization factors were then simulated for a variety of rainfall characteristics.
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Published In
Journal of the Hydraulics Division
Volume 98 • Issue 7 • July 1972
Pages: 1205 - 1220
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Jul 1972
Published online: Feb 3, 2021
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Authors
Affiliations
Ramachandra A. Rao, AM.ASCE
Asst. Prof., School of Civ. Engrg., Purdue Univ., Lafayette, IN
Jacques W. Delleur, M.ASCE
Prof., School of Civ. Engrg., Purdue Univ., Lafayette, IN
Bhaskara Seshadri P. Sarma
Asst. Prof., Indian Inst. of Technol., Kanpur, India, formerly, Grad. Res. Asst., School of Civ. Engrg., Purdue Univ., Lafayette, IN
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