ارزیابی روش تابع انتقال برای روندیابی سیلاب در بازه‌های رودخانه‌ای

داشتن مدل‌های دقیق و در عین حال ساده برای پیش‌بینی سیلاب، قابلیت‌های زیادی به سیستم‌های هشدار سیل اضافه می نماید. در این تحقیق سعی بر آن شد تا با استفاده از داده های دبی روزانه به مدت پانزده سال (سال‌های 2001 تا 2015) در شش ایستگاه هیدرومتری که در قالب سه بازه مطالعاتی بر روی رودخانه‌های زرینه‌رود و سیمینه‌رود قرار گرفته بودند و همچنین با استفاده از مدل تحلیلی adz و فرم گسسته زمانی آن که تحت عنوان تابع انتقال نام‌گذاری می‌شود، اقدام به روندیابی سیلاب در رودخانه‌های مذکور گردید. ابتدا درجه صورت و مخرج در تابع انتقال که نشان دهنده تعداد زیر بازه‌ها و نحوه اتصال آن‌ها به همدیگر است، استخراج شد که در این مطالعه، بهترین توابع انتقال بدست آمده دارای یک زیربازه تشخیص داده شدند. سپس خود مقادیر ضرایب صورت و مخرج تابع انتقال در هر سه بازه، از طریق جعبه ابزار captain محاسبه شده و در کنار آن پارامتر‌های آماری مربوط به توزیع‌ها نیز شامل پارامتر یانگ (yic)، rt2 و evn استخراج گردید و مقادیر مربوط به این پارامترها برای بازه داشبند بوکانپل بوکان، آلاسقلصفاخانه و پل قشلاقپل آنیان به ترتیب به صورت سری‌های سه تائی (5.241-، 0.879 و 10.86-)، (3.954-، 0.903 و 9.43-) و (2.792-، 0.920 و 8.139-) بدست آمد. نمودارهای ترسیم شده از طریق این توابع انتقال، نشان دهنده انطباق بسیار خوب با داده‌های مشاهداتی است. در نهایت نتیجه گیری گردید که این روش از سایر روش‌های روندیابی سیل، که در دقیق‌ترین حالت خود شامل حل کامل معادلات سنت ونانت هستند، ساده‌تر می باشد.

Evaluation of the transfer function method in the flood routing of 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 (20012015) 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 BOUKANBOUKAN bridge, ALASAGGALSAFAKHANEH, 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 (20012015) 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 BOUKANBOUKAN bridge, ALASAGGALSAFAKHANEH, 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 (20012015) 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 BOUKANBOUKAN bridge, ALASAGGALSAFAKHANEH, 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 (20012015) 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 BOUKANBOUKAN bridge, ALASAGGALSAFAKHANEH, 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.