scholarly journals Comparative Study of M5 Model Tree and Artificial Neural Network in Estimating Reference Evapotranspiration Using MODIS Products

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Armin Alipour ◽  
Jalal Yarahmadi ◽  
Maryam Mahdavi
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Hydrological Cycle ◽  
Reference Evapotranspiration ◽  
Weather Data ◽  
Climatic Data ◽  
M5 Model Tree ◽  
Model Tree ◽  
Artificial Neural ◽  
M5 Model

Reference evapotranspiration (ETO) is one of the major parameters affecting hydrological cycle. Use of satellite images can be very helpful to compensate for lack of reliable weather data. This study aimed to determine ETO using land surface temperature (LST) data acquired from MODIS sensor. LST data were considered as inputs of two data-driven models including artificial neural network (ANN) and M5 model tree to estimate ETO values and their results were compared with calculated ETO by FAO-Penman-Monteith (FAO-PM) equation. Climatic data of five weather stations in Khuzestan province, which is located in the southeastern Iran, were employed in order to calculate ETO. LST data extracted from corresponding points of MODIS images were used in training of ANN and M5 model tree. Among study stations, three stations (Amirkabir, Farabi, and Gazali) were selected for creating the models and two stations (Khazaei and Shoeybie) for testing. In Khazaei station, the coefficient of determination (R2) values for comparison between calculated ETO by FAO-PM and estimated ETO by ANN and M5 tree model were 0.79 and 0.80, respectively. In a similar manner, R2 values for Shoeybie station were 0.86 and 0.85. In general, the results showed that both models can properly estimate ETO by means of LST data derived from MODIS sensor.

scholarly journals Modeling of Evapotranspiration (ETo) in a Medium Urban Park within a Megacity by Using Artificial Neural Network (ANN) Model

2021 ◽  
Author(s):  
Hayder Algretawee ◽  
Ghofran Alshama
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Hydrological Cycle ◽  
Reference Evapotranspiration ◽  
Coefficient Of Determination ◽  
Medium Size ◽  
Ann Model ◽  
Artificial Neural ◽  
Artificial Neural Network Ann ◽  
Main Component

Evapotranspiration (ETo) is considered a main component of the hydrological cycle. This study was carried out on a medium-size park within a highly urbanized area, close to the center of Melbourne city. The purpose of the study is to calculate the reference evapotranspiration (ETo), particularly at a specified spot in a corner of the park. The hand-held device used to collect data gave consistent results and reduced the need for assumptions. The Penman-Montieth equation was used to calculate the reserved ETo. To build an ETo model, Artificial Neural Network (ANN) was adopted to predict ETo. Three models were built to select the best model, based on the least Root Mean Square Error (RMSE) and the highest coefficient of determination (R2). Results showed a contrast between the observed and predicted magnitudes of ETo. Both of the observed and predicted magnitudes for ETo are higher than most recent studies. Data from the specified location shows a difference in ETo magnitudes relative to the fixed meteorological stations. This study supports that climate change causes increasing magnitudes of reference evapotranspiration ETo.

scholarly journals Modelling Reference Evapotranspiration using a Novel Regression-based Method: Radial basis M5 Model Tree

2021 ◽  
Author(s):  
Ozgur Kisi ◽  
Behrooz Keshtegar ◽  
Mohammad Zounemat-Kermani ◽  
Salim Heddam ◽  
Nguyen-Thoi Trung
Keyword(s):  
Neural Networks ◽  
Radial Basis Function ◽  
Basis Function ◽  
Reference Evapotranspiration ◽  
Climatic Data ◽  
M5 Model Tree ◽  
Model Tree ◽  
Radial Basis ◽  
Input Variables ◽  
M5 Model

Abstract In the current study, an ability of a novel regression-based method is evaluated in modelling daily reference evapotranspiration (ET0), which is an important issue in water resources management plans and helps farmers in irrigation planning. The method was developed by hybridizing radial basis function and M5 model tree and called as radial basis M5 model tree (RM5Tree). The radial-based kernel function was used to control the input variables in modelling process of M5 model tree. The new model results were compared with traditional M5 model tree (M5Tree), response surface method (RSM) and two neural networks (multi-layer perceptron neural networks, MLPNN & radial basis function neural network, RBFNN) with respect to several statistical indices. Daily climatic data (relative humidity, RH, solar radiation, SR, wind speed, air temperature, T) recorded at three stations in Turkey, Mediterranean Region, were used. The effect of each weather data on ET0 was also investigated by utilizing three different input scenarios with various combinations of input variables. On the whole, the RM5Tree provided the best results (NSE > 0.997) followed by the MLPNN (NSE > 0.990), and M5Tree (NSE > 0.945) in modelling daily ET0. The SR was observed as the most effective input parameter on ET0 which was followed by the T and RH. However, the findings of the third modelling scenario revealed that taking into account of all variables would considerably increase models’ accuracies for the three stations.

scholarly journals Estimating missing hourly climatic data using artificial neural network for energy balance based ET mapping applications

2017 ◽  
Vol 24 (3) ◽  
pp. 457-465
Author(s):  
Eyup Selim Koksal ◽  
Bilal Cemek ◽  
Sakine Cetin ◽  
Prasanna H. Gowda ◽  
Terry A. Howell
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Energy Balance ◽  
Climatic Data ◽  
Artificial Neural

A comparative study of concrete strength prediction using artificial neural network, multigene programming and model tree

2019 ◽  
Vol 5 (2) ◽  
pp. 42
Author(s):  
Preeti Kulkarni ◽  
Shreenivas N. Londhe ◽  
Pradnya R. Dixit
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Concrete Strength ◽  
Model Performance ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Model Tree ◽  
Multigene Genetic Programming ◽  
Input Parameters ◽  
Artificial Neural

In the current study 28 day strength of Recycled Aggregate Concrete (RAC) and Fly ash (class F) based concrete is predicted using Artificial Neural Network (ANN), Multigene Genetic Programming (MGGP) and Model Tree (MT). Four sets of models were designed for per cubic proportions of materials, Properties of materials and non-dimensional parameters as input parameters. The study shows that the predicted 28 day strength is in good agreement with the observed data and also generalize well to untrained data. ANN outperforms MGGP and MT in terms of model performance. Output of the developed models can be presented in terms of trained weights and biases in ANN, equations in MGGP and in the form of series of equations in MT. ANN, MGGP and MT can grasp the influence of input parameters which can be seen through Hinton diagrams in ANN, input frequency distribution in MGGP and coefficients of input parameters in MT. The study shows that these data driven techniques can be used for developing model/s to predict strength of concrete with an acceptable performance.

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