AN OPEN ACCESS JOURNAL
 JJCE Submission Home


Estimating Of Manning�s Roughness Coefficient For Hilla River Through Calibration Using Hec-ras Model

Submitted2013-01-02
Last Update2013-01-02
TitleEstimating Of Manning�s Roughness Coefficient For Hilla River Through Calibration Using Hec-ras Model
Author(s)Author #1
Author title:
Name: Luay Kadhim Hameed
Org: University of Kufa, Kufa, Iraq
Country:
Email: test@test.test

Author #2
Author title:
Name: Salah Tawfeek Ali
Org: University of Babylon, Babylon, Iraq
Country:
Email:

Other Author(s)
Contact AuthorAuthor #1
Alt Email:
Telephone:
KeywordsManning�s roughness coefficient, Open channel, Flow resistance, Hilla river, Calibration, HEC-RAS model.
AbstractThe appropriate value of Manning�s roughness coefficient (n) is chosen through the process of calibration; i.e., the value which reproduces observed data to an acceptable accuracy. In the present study, the HEC-RAS unsteady flow model is applied to Hilla river (upstream Hilla city) to predict the value of Manning�s coefficient through the calibration procedure. The data are taken for the period from 20 August 2008 to 12 September 2008 and divided equally into two sets; the first set is for calibration purpose; i.e., estimation of (n) and the rest for verification which is the process of testing the model with actual data to establish its predictive accuracy. It is found that the value of Manning's roughness coefficient (n) for Hilla river which shows good agreement between observed and computed hydrographs is (0.027).
Paperview paper 2455.pdf (693KB)

http://www.just.edu.jo