Evaluation of the transfer function method in the flood routing of the river reaches

Document Type : Research Article

Authors

1 Civil Engineering Department- Faculty of Engineering- University of Maragheh

2 Civil engineering department, University of Maragheh

Abstract

Application of simple and accurate routing models in the flood warning systems increases the capabilities of them. In the present study, it was attempted to fulfil the flood routing using ADZ model and its discrete time form which is named transfer function in the three river reaches, located between six hydrometric stations along the ZARINE and SIMINEH streams. Daily river’s discharges during 15 years (2001-2015) have been employed in the reach routing. Firstly, the numbers of the numerator and denominator terms have been obtained. These parameters are giving the numbers of the subzones in every river reach and also the conditions of the connections (series or parallel). The results of the present study revealed only one sub reach for every river. Therefore, any more analysis of the connection conditions has not been done. After that, the values of the transfer function’s coefficients have been derived using micro CAPTAIN toolbox. The statistical parameters of the mentioned toolbox as ((YIC), (Rt2), and (EVN) for the reaches of the DASHBAND BOUKAN-BOUKAN bridge, ALASAGGAL-SAFAKHANEH, and GESHLAGH bridge- ANIAN bridge have been determined as triple sets of (-5.241, 0.879, -10.86), (-3.954, 0.903, -9.43), and (-2.792, 0.920, -8.139) respectively. The outcomes exhibited a right corresponding between the theoretical graphs, obtained with the transfer function, and observed discharges. The transfer function method is more straightforward rather than the other accurate methods of flood routing like fully saint venant equations. Therefore, it can be used as an efficient method in the flood routing in the river reaches.


Application of simple and accurate routing models in the flood warning systems increases the capabilities of them. In the present study, it was attempted to fulfil the flood routing using ADZ model and its discrete time form which is named transfer function in the three river reaches, located between six hydrometric stations along the ZARINE and SIMINEH streams. Daily river’s discharges during 15 years (2001-2015) have been employed in the reach routing. Firstly, the numbers of the numerator and denominator terms have been obtained. These parameters are giving the numbers of the subzones in every river reach and also the conditions of the connections (series or parallel). The results of the present study revealed only one sub reach for every river. Therefore, any more analysis of the connection conditions has not been done. After that, the values of the transfer function’s coefficients have been derived using micro CAPTAIN toolbox. The statistical parameters of the mentioned toolbox as ((YIC), (Rt2), and (EVN) for the reaches of the DASHBAND BOUKAN-BOUKAN bridge, ALASAGGAL-SAFAKHANEH, and GESHLAGH bridge- ANIAN bridge have been determined as triple sets of (-5.241, 0.879, -10.86), (-3.954, 0.903, -9.43), and (-2.792, 0.920, -8.139) respectively. The outcomes exhibited a right corresponding between the theoretical graphs, obtained with the transfer function, and observed discharges. The transfer function method is more straightforward rather than the other accurate methods of flood routing like fully saint venant equations. Therefore, it can be used as an efficient method in the flood routing in the river reaches.


Application of simple and accurate routing models in the flood warning systems increases the capabilities of them. In the present study, it was attempted to fulfil the flood routing using ADZ model and its discrete time form which is named transfer function in the three river reaches, located between six hydrometric stations along the ZARINE and SIMINEH streams. Daily river’s discharges during 15 years (2001-2015) have been employed in the reach routing. Firstly, the numbers of the numerator and denominator terms have been obtained. These parameters are giving the numbers of the subzones in every river reach and also the conditions of the connections (series or parallel). The results of the present study revealed only one sub reach for every river. Therefore, any more analysis of the connection conditions has not been done. After that, the values of the transfer function’s coefficients have been derived using micro CAPTAIN toolbox. The statistical parameters of the mentioned toolbox as ((YIC), (Rt2), and (EVN) for the reaches of the DASHBAND BOUKAN-BOUKAN bridge, ALASAGGAL-SAFAKHANEH, and GESHLAGH bridge- ANIAN bridge have been determined as triple sets of (-5.241, 0.879, -10.86), (-3.954, 0.903, -9.43), and (-2.792, 0.920, -8.139) respectively. The outcomes exhibited a right corresponding between the theoretical graphs, obtained with the transfer function, and observed discharges. The transfer function method is more straightforward rather than the other accurate methods of flood routing like fully saint venant equations. Therefore, it can be used as an efficient method in the flood routing in the river reaches.


Application of simple and accurate routing models in the flood warning systems increases the capabilities of them. In the present study, it was attempted to fulfil the flood routing using ADZ model and its discrete time form which is named transfer function in the three river reaches, located between six hydrometric stations along the ZARINE and SIMINEH streams. Daily river’s discharges during 15 years (2001-2015) have been employed in the reach routing. Firstly, the numbers of the numerator and denominator terms have been obtained. These parameters are giving the numbers of the subzones in every river reach and also the conditions of the connections (series or parallel). The results of the present study revealed only one sub reach for every river. Therefore, any more analysis of the connection conditions has not been done. After that, the values of the transfer function’s coefficients have been derived using micro CAPTAIN toolbox. The statistical parameters of the mentioned toolbox as ((YIC), (Rt2), and (EVN) for the reaches of the DASHBAND BOUKAN-BOUKAN bridge, ALASAGGAL-SAFAKHANEH, and GESHLAGH bridge- ANIAN bridge have been determined as triple sets of (-5.241, 0.879, -10.86), (-3.954, 0.903, -9.43), and (-2.792, 0.920, -8.139) respectively. The outcomes exhibited a right corresponding between the theoretical graphs, obtained with the transfer function, and observed discharges. The transfer function method is more straightforward rather than the other accurate methods of flood routing like fully saint venant equations. Therefore, it can be used as an efficient method in the flood routing in the river reaches.

Keywords


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