|
Abstract
|
Article Information:
Impact of Infiltration Methods on the Accuracy of Rainfall-Runoff Simulation
Manal M. Abood, Thamer Ahmed Mohammed, Abdul Halim Ghazali, Ahmed Rodzi Mahmud and Lariyah Mohd Sidek
Corresponding Author: Manal M. Abood
Submitted: December 23, 2011
Accepted: January 26, 2012
Published: June 15, 2012 |
Abstract:
|
In this research, attempts are maid to evaluate the performance of HEC-HMS (Hydrological
modeling) in simulating the rainfall-runoff using two different rainfall infiltration methods. The rainfall-runoff
process for the study area which consist of two catchments namely kenyir catchment and Berang catchment,
Terengganu, Malaysia is simulated using HEC-HMS program. Two methods for estimating infiltration (rainfall
abstraction losses) are built in the program. These methods are SCS Curve Number method and Green and
Ampt method. The impact of selected method on the accuracy of rainfall-runoff simulation is studied. Statistical
analysis include the computation of the coefficient of determination (R2), the mean square error (MSE) and the
Mean Absolute Percentage Error (MAPE) were used to check the accuracy of HEC-HMS simulations using
the two infiltration methods. The result showed that the errors in the simulation output using the SCS Curve
Number method were 6.5% for Berang catchment and 8.2% for Kenyir catchment, while the errors in the
simulation output using Green and Ampt method were 9.13% for Berang catchment and 11.11% for Kenyir
catchment. As a conclusion, it is found that the output of HEC-HMS program is in agreement with the historical
recorded data and it is recommended to use the SCS Curve Number infiltration method for the tropical
catchment due to its low error in simulation output.
Key words: Green and Ampt method, HEC HMS program, SCS curve number method, simulation, statistical test, ,
|
|
Abstract
|
PDF
|
HTML |
|
Cite this Reference:
Manal M. Abood, Thamer Ahmed Mohammed, Abdul Halim Ghazali, Ahmed Rodzi Mahmud and Lariyah Mohd Sidek, . Impact of Infiltration Methods on the Accuracy of Rainfall-Runoff Simulation. Research Journal of Applied Sciences, Engineering and Technology, (12): 1708-1713.
|
|
|
|
 |
ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
 |
| Information |
|
|
|
|
| Sales & Services |
|
|
|
|
