Comparative Evaluation of Global Rainfall Datasets with Observation Rainfall Values (Case Study: Karoun Basin)

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RAHMATI A.; MASSAH BAVANI A.R.

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Paper Information

Journal: IRAN-WATER RESOURCES RESEARCH Year:2019 | Volume:15 | Issue:1 Page(s): 178-192

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Title

Comparative Evaluation of Global Rainfall Datasets with Observation Rainfall Values (Case Study: Karoun Basin)

Author(s)

RAHMATI A. | MASSAH BAVANI A.R. | Issue Writer Certificate

Keywords

Global Precipitation DatasetsQ1

Gridded DataQ1

Satellite DatasetsQ1

Karoun BasinQ2

Abstract

Due to the uneven spatio-temporal coverage of precipitation over Iran and using rain gauge stations to measure rainfall, there is a need for Gridded Data with proper spatial and temporal resolution. For this reason, global rainfall data centers are being used in water resources studies. In recent years, the number of these Gridded Datasets increased and many of them have been used in water resources studies. In this research, rainfall datasets have been evaluated in both pixel scale and mean basin with observation data in the Karoun Basin as a case study. The datasets used in this study were PERSIANN, PERSIANN-CDR, APHRODITE, TRMM-3B42 RT, CHIRPS V2. 0, ERRA-INTERIM. Evaluations were made on a daily scale and for the period of 2003-2013. According to the results of statistical indices such as coefficient of determination and NRMSE, the APHRODITE and ERRA-INTERIM datasets have shown better performance than others. Also, according to the contingency table indicators, the APHRODITE and ERRA-INTERIM datasets have good performance. The results showed that despite the fact that the APHRODITE and ERRAINTERIM datasets have the proper accuracy in all evaluations, they have poor performance in detecting non-occurrence of rainfall. According to the evaluations, the APHRODITE dataset can be used as an alternative to observational data. Among Satellite Datasets, TRMM had better performance and with calibration and bias correction using observational data this satellite can be used in water resources studies for the target area.

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APA: Copy

RAHMATI, A., & MASSAH BAVANI, A.R.. (2019). Comparative Evaluation of Global Rainfall Datasets with Observation Rainfall Values (Case Study: Karoun Basin). IRAN-WATER RESOURCES RESEARCH, 15(1 ), 178-192. SID. https://sid.ir/paper/100069/en

Vancouver: Copy

RAHMATI A., MASSAH BAVANI A.R.. Comparative Evaluation of Global Rainfall Datasets with Observation Rainfall Values (Case Study: Karoun Basin). IRAN-WATER RESOURCES RESEARCH[Internet]. 2019;15(1 ):178-192. Available from: https://sid.ir/paper/100069/en

IEEE: Copy

A. RAHMATI, and A.R. MASSAH BAVANI, “Comparative Evaluation of Global Rainfall Datasets with Observation Rainfall Values (Case Study: Karoun Basin),” IRAN-WATER RESOURCES RESEARCH, vol. 15, no. 1 , pp. 178–192, 2019, [Online]. Available: https://sid.ir/paper/100069/en

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