Investigating Parameters of Geomorphic Direct Runoff Hydrograph Models


如何引用文章

全文:

开放存取 开放存取
受限制的访问 ##reader.subscriptionAccessGranted##
受限制的访问 订阅存取

详细

Formulation of rainfall runoff models and identification of their parameters is difficult step especially for catchments having scanty or no data. Parameters of geomorphic instantaneous unit hydrograph (GIUH) models have been investigated in this research. Recorded data of Shahpur Dam Catchment, Pakistan was used for developing direct runoff hydrograph model. Satellite imageries of the catchment were processed using ArcGIS 10.1 to estimate geomorphologic parameters. The rainfall and runoff data for 10 events was collected from Meteorological Department Lahore and from Small Dam Organization, Rawalpindi, Pakistan. Rainfall data was analyzed and excess rainfall was estimated using Percent Runoff Method. Using estimated geomorphologic parameters the ordinates of GIUH- Nash Model were obtained by standard equations of Nash instantaneous unit hydrograph (IUH). These ordinates of Nash-IUH, were converted into the ordinates of direct runoff hydrographs through their convolution with the excess rainfall. The results of model were evaluated on the basis of their deviation from the observed runoff data. Statistical parameter Nash-Sutcliffe Coefficient and percent error between observed and simulated direct runoff were used for this purpose. The impact of using digital elevation models (DEM) of two different resolutions; 30 and 90 m, was then investigated. It is observed that the geomorphic parameters are affected due to DEM’s resolution. Hence the resolution of DEM impacts the direct runoff as well.

作者简介

A. Ghumman

Department of Civil Engineering, College of Engineering, Qassim University; Department of Civil Engineering, University of Engineering and Technology

编辑信件的主要联系方式.
Email: abdul.razzaq@uettaxila.edu.pk
沙特阿拉伯, Buraydah, 51452; Taxila, 47050

Y. Ghazaw

Department of Civil Engineering, College of Engineering, Qassim University; Irrigation and Hydraulic Department, Faculty of Engineering, Alexandria University

编辑信件的主要联系方式.
Email: ghazaw@qec.edu.sa
沙特阿拉伯, Buraydah, 51452; Alexandria

R. Abdel-Maguid

Department of Civil Engineering, College of Engineering, Qassim University; Faculty of Engineering, Fayoum University

编辑信件的主要联系方式.
Email: drramadan@qec.edu.sa
沙特阿拉伯, Buraydah, 51452; Al Fayoum

A. Zafar

Department of Civil Engineering, University of Engineering and Technology

Email: drramadan@qec.edu.sa
巴基斯坦, Taxila, 47050

补充文件

附件文件
动作
1. JATS XML

版权所有 © Pleiades Publishing, Ltd., 2019