Evaluation of flood routing techniques in arid and semi-arid regions

الملخص EN

The objective of this study was based on evaluation of the hydrological routing techniques used in flood routing analysis using data from Yiba catchment in theKingdom of Saudi Arabia.

The study used the Hydrologic Engineering Center-Hydrologic Modeling Systems (HEC-HMS) and the Excel program.

Three hydrological routing modeling techniques were investigated in this study which includes; the two parameter Muskingum method, the three parameter Muskingum method and the Muskingum-Cunge method.

A comparison among the three methods was performed in the modeling of the Yiba Rive mainstream.

The resultant hydrographs of the reconstructed events displayed some correlation among the parameters.

The observations and the reconstructed hydrographs indicated a high correlation coefficient; 0.99 of both the peak discharges and volume by a three parameter Muskingum method, 0.96 for peak discharge and 0.86for volume by a two parameter Muskingum method and 0.87 for peak discharge and 0.86 for volume by Muskingum-Cunge method.

This leads to the conclusion that the three parameter Muskingum method is the best to be used in arid and semi-arid regions.