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Register a new userRainfall-Runoff Modeling by Using Hybrid System of Artificial Neural Network and Genetic Algorithm
نمذجة علاقة الهطل_الجريان باستخدام نظام هجين من الشبكات العصبية الصنعية و الخوارزمية الجينية
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تستخدم الشبكة العصبية الصنعية طريقة تعلم استقرائي، و تتطلب بشكل عام أمثِلة لبيانات التدريب، بينما تستخدم الخوارزمية الجينية تعلم اقتطاعي، و تتطلب تابع هدف. لقد تمّ تنظيم التعاون بين هاتين التقانتين في دراستنا هذه بغرض تعزيز أداء كل تقانة من خلال بناء نظام هجين منهما، عن طريق كتابة برمجيّة عامّة باستخدام برنامج MATLAB بغرض الاختيار الفعّال لمتحولات الدخل لعمليات التنبؤ، و أمثلة أوزان شبكة البيانات قيد الدراسة، و من ثمّ تطبيق هذه البرنامج على بيانات يوميّة، تمّ جمعها من حوض نهر الكبير الجنوبي هي (الهطول، التبخر، الحرارة، الرطوبة النسبية و الجريان النهري بتأخر زمني مقداره يوم واحد) بغرض التنبؤ بالجريان النهري.
This study has reached to that ANN (5-9-1) (five neurons in input layer_nine neurons in hidden layer _ one neuron in output layer) is the optimum artificial network that hybrid system has reached to it with mean squared error equals (1*10^-4) (0.7 m3/sec), where this software has summed up millions of experiments in one step and in limited time, it has also given a zero value of a number of network connections, such as some connections related of relative humidity input because of the lake of impact this parameter on the runoff when other parameters are avaliable. This study recommend to use this technique in forecasting of evaporation and other climatic elements.
References used
AWAD, A. ؛POSER, I. 2007-Calibrating Conceptual Rainfall- Runoff Models Using a Real Genetic Algorithm Combined with a Local Search Method, Vol. 1, 174-181
Mutlu, E; Chaubey, I; Hexmoor, H; Bajwa, S. 2008- Comparison of artificial neural network models for hydrologic predictions at multiple gauging stations in an agricultural watershed, Published online in Wiley InterScience, 1-10
ASADI, S.؛ SHAHRABI, J.؛ ABBASZADEH, P. ؛TABANMEHR, S. 2013- A new hybrid artificial neural networks for rainfall_runoff process modeling, Neurocomputing an international journal, Iran, 470_480
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The relationship between precipitation and surface runoff is one of
the fundamental components of the hydrological cycle of water in
nature and is one of the most complex and difficult to understand
because of the large number of parameters involv
ed in the
modeling of physical processes and the breadth of parmetry and
temporary change in basin specifications. Multiple rainfall models
Modeling the relationship between precipitation and runoff is very
important for engineering design and integrated water resources
management, as well as flood forecasting and risk prevention.
The relation between rainfall and runoff forms one of the main hydrological cycle elements. It is one of the most complex hydrological phenomena because of the great numbers of parameters used in modeling the physical processes, the expansion of thei
r parameter space, and the temporary change in watershed specifications. Thus, modeling the relation between rainfall and runoff is necessary for hydrological and hydraulic engineering design, integrated management of water resourses, and forecasting flood and preventing its dangers. This research aims at modeling the relation between rainfall and runoff in Alkabeer Aljononbee catchment. It depends on the technique of Artificial Neural Network (ANN). The mathematical model was built by the ntstool and nntool available in the Matlab program. This model depends on daily rainfall, evaporation, air temperature, and relative humidity data taken from meteorological stations that are distributed in the watershed. The daily runoff data have also been used for checking the performance accuracy of the network, using the Simulink technique. The results of this research confirm that artificial neural network technology offers good results in modeling the relation rainfall-runoff, depending on the set of data used. So it could be a better alternative than traditional approaches.
In this research, a hybrid system was proposed between the
genetic algorithm and the fuzzy Kohonen clustering network ,
where the genetic algorithm is one of the methods of artificial
intelligence is one of the modern methods.
the aim of this study is
determination of the most influential climatic factors in the rainfall
runoff relationship in Al-Kabir Al-shimalee river using artificial
neural networks. The inputs included Precipitation, runoff, in
different delays, in
addition on لاclimate factor in each network, to
determinate the best model.
The principal objective of this research is an adoption of the Genetic
Algorithm (GA) for studying it firstly, and to stop over the operations which
are introduced from the genetic algorithm.The candidate field for applying
the operations of the g
enetic algorithm is the sound data compression field.
This research uses the operations of the genetic algorithm for the
enhancement of the performance of one of the popular compression method.
Vector Quantization (VQ) method is selected in this work. After studying
this method, new proposed algorithm for mixing the (GA) with this method
was constructed and then the required programs for testing this algorithm
was written. A good enhancement was recorded for the performance of the
(VQ) method when mixed with the (GA). The proposed algorithm was
tested by applying it on some sound data files. Some fidelity measures are
calculated to evaluate the performance of the new proposed algorithm.
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