Predictive model-based for the critical submergence of horizontal intakes in open channel flows with different clearance bottoms using CART, ANN and linear regression approaches
نویسندگان
چکیده
This study presents the development of classification and regression tree (CART), artificial neural network (ANN) and linear regression approaches to predict the critical submergence in an open channel flow for different clearance bottoms. To use the models for application purposes and cover the wide range of inputs, the nondimensional parameters are employed to train and test. The testing results show that all three approaches satisfactorily estimate the critical submergence with margin differences. Also, committee models arithmetic mean-based for the testing results of the tree mentioned approaches are presented as the best models. A comparison between the present study and empirical approaches is carried out which indicates the proposed approaches outperform the empirical formulas expressed in the literature. In addition, committee models are presented as the more generalized approaches by AIC criterion. The results also indicate that the variations of the best approach (committee)-predicted and observed the normalized critical submergence with the intake pipe diameter versus the number of the testing data follow favorably a similar trend. Finally, a sensitivity analysis shows that the ratio of the velocity in an intake pipe to the velocity in a channel is the significant parameter in the estimation of the critical
منابع مشابه
Application of Soft Computing Methods in the Analysis of Velocity Field in Dividing Channel
The simplest water diversion method in irrigation systems is using intakes. Measuring the mean velocity is one of the essential hydraulic parameters in increasing the efficiency of the intake. In this study, the mean velocity was predicted for different width ratios of an intake using ANN-MLP neural network model. In order to do that, the flow field within a 90-degree intake was first simulated...
متن کاملDevelopment of an Implicit Numerical Model for Calculation of Sub and Super Critical Flows
A two dimensional numerical model of shallow water equations was developed tocalculate sub and super-critical open channel flows. Utilizing an implicit scheme the steady stateequations were discretized based on control volume method. Collocated grid arrangement was appliedwith a SIMPLEC like algorithm for depth-velocity coupling. Power law scheme was used fordiscretization of convection and dif...
متن کاملDischarge Coefficient in Vertical Intakes with Additional Plates
One of the causes of perturbation at vertical intakes is the happening of vortices with an air core. The vortices with an air core occur whenever the submergence of the intake is less than a critical value. Anti-vortex devices and specially plates are used to avoid the negative effects of the air-core vortices. If plates are used, then the geometry of them should be studied experimentally. Acco...
متن کاملDevelopment of an Implicit Numerical Model for Calculation of SUB-and Super-Critical Flows
A two dimensional numerical model of shallow water equations was developed to calculate sub and super-critical open channel flows. Utilizing an implicit scheme the steady state equations were discretized based on a control volume method. Collocated grid arrangement was applied with a SIMPLEC like algorithm for depth-velocity coupling. A power law scheme was used for discretization of convection...
متن کاملWater Quality Index Estimation Model for Aquaculture System Using Artificial Neural Network
Water Quality plays an important role in attaining a sustainable aquaculture system, its cumulative effect can make or mar the entire system. The amount of dissolved oxygen (DO) alongside other parameters such as temperature, pH, alkalinity and conductivity are often used to estimate the water quality index (WQI) in aquaculture. There exist different approaches for the estimation of the quality...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Expert Syst. Appl.
دوره 38 شماره
صفحات -
تاریخ انتشار 2011