Performance Evaluation of Reference Evapotranspiration Estimation Using Climate Based Methods and Artificial Neural Networks (original) (raw)
Abstract
This study is an attempt to find best alternative method to estimate reference evapotranspiration (ETo) for the Mahanadi reservoir project (MRP) command area located at Raipur (Chhattisgarh) in India, when input climatic parameters are insufficient to apply standard Food and Agriculture Organization (FAO) of the United Nations Penman–Monteith (P–M) method. To identify the best alternative climatic based method that yield results closest to the P–M method, performances of four climate based methods namely Blaney–Criddle, Radiation, Modified Penman and Pan evaporation were compared with the FAO-56 Penman–Monteith method. Performances were evaluated using the statistical indices. The statistical indices used in the analysis were the standard error of estimate (SEE), raw standard error of estimate (RSEE) and the model efficiency. Study was extended to identify the ability of Artificial Neural Networks (ANNs) for estimation of ETo in comparison to climatic based methods. The networks, using varied input combinations of climatic variables have been trained using the backpropagation with variable learning rate training algorithm. ANN models were performed better than the climatic based methods in all performance indices. The analyses of results of ANN model suggest that the ETo can be estimated from maximum and minimum temperature using ANN approach in MPR area.
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Authors and Affiliations
- Civil Engg. and Applied Mechanics Dept., SGSITS, Indore, Madhya Pradesh, India
Seema Chauhan & R. K. Shrivastava
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- Seema Chauhan
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Chauhan, S., Shrivastava, R.K. Performance Evaluation of Reference Evapotranspiration Estimation Using Climate Based Methods and Artificial Neural Networks.Water Resour Manage 23, 825–837 (2009). https://doi.org/10.1007/s11269-008-9301-5
- Received: 19 June 2007
- Accepted: 27 June 2008
- Published: 01 August 2008
- Issue Date: March 2009
- DOI: https://doi.org/10.1007/s11269-008-9301-5