Volume 20, Number 76 (Summer 2016)                   JWSS 2016, 20(76): 85-98 | Back to browse issues page

DOI: 10.18869/acadpub.jstnar.20.76.85

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Dezfooli D, Hosseini-Moghari S M, Ebrahimi K. Comparison of TRMM-3B42 V7 and PERSIANN Satellites Precipitation Data with Ground-Based Data (Case study: Gorganrood Basin, Iran). JWSS. 2016; 20 (76) :85-98
URL: http://jstnar.iut.ac.ir/article-1-3336-en.html

1. Dept. of Irrigation & Reclamation Eng., Faculty of Agri. Eng. & Technol., Univ. of Tehran, Tehran, Iran.
Abstract:   (4338 Views)

Precipitation is an important element of the hydrologic cycle and lack of this data is one of the most serious problems facing research on hydrological and climatic analysis. On the other hand, using satellite images has been proposed by many researchers as one of practical strategies to estimate precipitation. The present paper aims to evaluate the accuracy of satellite precipitation data, provided by PERSIANN and TRMM-3B42 V7 in Gorganrood basin, Iran. To achieve this aim, two sets of daily precipitation ground-based data, 2003 to 2004 and 2006 to 2007, from six stations of Gorganrood basin, named; “Tamer”, “Ramian”, “Bahalkeh-ye Dashli”, “Gorgan Dam”, “Ghaffar Haji” and “Fazel Abad” have been used in this paper. The evaluation indices have been calculated and analyzed in different time scales, including daily, monthly and seasonal. The results indicated that the two above mentioned satellite models are not accurate in daily scale. However, they showed reasonable accuracy in monthly and seasonal scales. The highest correlations between satellites and recorded data in daily and monthly scales, for TRMM-3B42 V7 in “Gorgan Dam” and “Bahlke Dashlei” stations, are 0.397 and 0.404, respectively. The comparison of measured and satellite data of winter showed better agreement for PERSIANN model. However, TRMM-3B42 V7 shows better correlation in other seasons. The results also indicated that while TRMM-3B42 data displays higher correlation with measured data, PERSIANN provids better results in predicting the number of rainy days. 

Full-Text [PDF 386 kb]   (900 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2016/09/5 | Accepted: 2016/09/5 | Published: 2016/09/5

Add your comments about this article : Your username or email:
Write the security code in the box

© 2015 All Rights Reserved | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb