Comparison of Historical Precipitation Data Between Cordex Model and Imd Over Malaprabha River Basin, Karnataka State, India
Nagalapalli Satish1, Sathyanathan Rangarajan2, Deeptha Thattai3, Rehana Shaik4
1Nagalapalli Satish, Department of Civil Engineering, SRM Institute of Science and Technology, Kattankulathur (Tamil Nadu) India.
2Sathyanathan Rangarajan, Department of Civil Engineering, SRM Institute of Science and Technology, Kattankulathur (Tamil Nadu) India.
3Deeptha Thattai, Department of Civil Engineering, SRM Institute of Science and Technology, Kattankulathur (Tamil Nadu) India.
4Rehana Shaik, Department of Civil Engineering, IIIT Hyderabad (Telangana), India.
Manuscript received on 01 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript published on 30 May 2019 | PP: 1353-1357 | Volume-8 Issue-7, May 2019 | Retrieval Number: F3817048619/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Validation of precipitation data is important for hydrological modeling. Though there are many models available, rainfall prediction is difficult due to various uncertainties. This study is an attempt to compare and assess the Coordinated Regional Climate Downscaling Experiment (CORDEX) model data and India Meteorological Department (IMD) observed gridded data over Malaprabha river basin, Karnataka state, India. Both gridded data sets were downscaled at 0.25˚ × 0.25˚ resolution and then processed into a 12 × 115 matrix form by using QGIS (2.18.24) and MATLAB (R2003a). These two products were compared over the period 1961-2015 to evaluate their behavior in terms of fitness by using statistical parameters such as NSE, D, R, MAE, MBE and RMSE values. Results showed that out of 16 grid points, fourteen grid points showed medium correlation ranging between 0.30 and 0.49.
Keyword: CORDEX Model, Data Compression, Malaprabha River Basin, Validation of IMD and CORDEX Model Data.
Scope of the Article: Knowledge Modelling, Integration, Transformation, and Management.