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Information Journal Paper

Title

Evaluating the Performance of Precipitation Products Taking into Account the Climatic and Topographic Conditions across Iran

Pages

  62-81

Abstract

 Precipitation is a major component of the hydrological cycle which has significant changes over space and time. Missing data in precipitation measurements and improper distribution of precipitation measurement sites cause major problems in hydrological studies. Satellite data is a new alternative for estimating precipitation data and the present study aimed at evaluating the performance of P-CDR (Precipitation Estimation from Remotely Sensed Information Using Artificial Neural Networks-Climate Data Record) and CHIRPS (Climate Hazards Group Infrared Precipitation with Station Data) with spatial separation of 0. 25 × 0. 25 and on a daily, monthly and yearly scale for the period of 1990 to 2019 in 88 synoptic stations located in Iran. As a result of annual Precipitation Estimation analysis and according to performance Evaluation Indices, P-CDR had better performance than CHIRPS in all regions except for the north and northwest of Iran. Precipitation Estimation by P-CDR dataset in all basins except Urmia and Sarakhs had less error in estimating monthly precipitation compared to CHIRPS, and it had the highest correlation with observed data. CHIRPS daily rainfall estimation had better performance than P-CDR, especially in the Persian Gulf and Oman Sea basins. As CSI (critical success index) showed, CHIRPS had a better performance in detecting rainy and non-rainy days in almost all stations. According to the results of altitude-rainfall analysis, both datasets in the highlands of the Zagros mountain chain and north of the Alborz mountain chain performed weak in estimating precipitation.

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    • Cite

    APA: Copy

    NEZAFAT, A., MORIDI, A., Gorjizade, A., & YOUSEFI, H.. (2021). Evaluating the Performance of Precipitation Products Taking into Account the Climatic and Topographic Conditions across Iran. IRAN-WATER RESOURCES RESEARCH, 17(2 ), 62-81. SID. https://sid.ir/paper/958499/en

    Vancouver: Copy

    NEZAFAT A., MORIDI A., Gorjizade A., YOUSEFI H.. Evaluating the Performance of Precipitation Products Taking into Account the Climatic and Topographic Conditions across Iran. IRAN-WATER RESOURCES RESEARCH[Internet]. 2021;17(2 ):62-81. Available from: https://sid.ir/paper/958499/en

    IEEE: Copy

    A. NEZAFAT, A. MORIDI, A. Gorjizade, and H. YOUSEFI, “Evaluating the Performance of Precipitation Products Taking into Account the Climatic and Topographic Conditions across Iran,” IRAN-WATER RESOURCES RESEARCH, vol. 17, no. 2 , pp. 62–81, 2021, [Online]. Available: https://sid.ir/paper/958499/en

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