Open AccessEvaluation of Flood Routing Models and Their Relationship to The Hydraulic Properties of The Diyala River Bed
Author(s) -
Mohammed A. Kadhim,
Najah Kadhim Al-Bedyry,
Isam I. Omran
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/961/1/012058
Subject(s) - routing (electronic design automation) , outflow , flow (mathematics) , channel (broadcasting) , mean squared error , variance (accounting) , flood myth , hydrology (agriculture) , mathematics , statistics , geology , geotechnical engineering , computer science , geometry , telecommunications , computer network , philosophy , oceanography , accounting , theology , business
In this study, four types of flood routing approaches were studied which give significantly varied results represented by the differences between computed and observed flows and also differ considerably on the friction coefficient and bed slope of the channels. First two approaches use a hydraulic solution to solve the equations of unsteady flow, while the third approach uses the hydrological solution, and the fourth algorithm solves Muskingum approach with seven parameters. All these approaches were run with the same input parameters, the results were compared and tested with four Error Measurement Indices, Sum of Squared Deviations, Error of Peak Discharge, Variance Index, and agreement index. Diyala River was selected for this application. Dynamic wave method gave accurate results, followed by the characteristic method, and then the linear Muskingum-Cunge method, but Symbiotic Organisms Search Algorithm not gave any senses due to change in roughness or bed slope and gave very identical values with recorded outflow in all conditions, which means that the hydraulic solution is better compared to the hydrological solution. The results also showed that the difference between the calculated and observed flows diminished with a decrease in the coefficient of friction and an increase in the bed slope channel.