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Comparison of Different Geostatistical Methods for Estimating Rainfall in Hajighoshan Watershed

    Authors

    • Yosef Nabipour 1
    • Mahadi Vatakhah 2

    1 M.Sc. Student of Watershed Management, Faculty of Natural Resources, Tarbiat Modares University, I.R.IRAN.

    2 Associate Professor, Department of Watershed Management, Faculty of Natural Resources, Tarbiat Modares University, I.R.IRAN.

,

Document Type : Research Paper

10.22059/jrwm.2016.61698
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Abstract

Rainfall spatial analysis methods are very helpful since there are not enough rainfall gauge stations and watersheds are scattered in large extent. There are many different methods for estimating average precipitation such as; arithmetic method and Thiessen polygon. However, the arrangement and location of data and their correlations are not considered by classic methods. Thus, geostatistical techniques are applied instead. In the present article, 22 meteorological stations from within and around the basin with data collection period of 30 years were selected for the analysis. The geostatistic analysis methods including ordinary kriging, simple cokriging, ordinary cokriging, standardized ordinary kriging, moving average using inverse distance with powers of 1 to 5 were applied for spatial analysis of annual, monthly and 24 hourly maximum rainfall data in Hajighoshan watershed located in northeast of Iran. For this reason, rainfall data were fitted to different methods and compared using cross validation by removes rainfall values of each station, one at a time, and predicts the associated data value. The results of geostatistic analysis showed that ordinary kriging is the best method with MBE=34.26 for annual rainfall while moving average using inverse distance with power of 5 is the best method for monthly and 24 hourly maximum rainfall. According to the results obtained through analysis of variogram model, gaussian model are supposed as the best models for annual, monthly and 24 hourly maximum rainfall data.

Keywords

  • Isohyetal map
  • 24 hourly maximum rainfall
  • Kriging
  • Cokriging
  • Weighted inverse distance
  • Hajighoshan
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Journal of Range and Watershed Managment
Volume 69, Issue 2
July 2016
Pages 487-502
Files
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  • PDF 898.68 K
History
  • Receive Date: 18 May 2013
  • Revise Date: 28 July 2016
  • Accept Date: 14 March 2014
  • First Publish Date: 21 June 2016
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How to cite
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  • BibTeX
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Statistics
  • Article View: 577
  • PDF Download: 251

APA

Nabipour, Y., & Vatakhah, M. (2016). Comparison of Different Geostatistical Methods for Estimating Rainfall in Hajighoshan Watershed. Journal of Range and Watershed Managment, 69(2), 487-502. doi: 10.22059/jrwm.2016.61698

MLA

Yosef Nabipour; Mahadi Vatakhah. "Comparison of Different Geostatistical Methods for Estimating Rainfall in Hajighoshan Watershed". Journal of Range and Watershed Managment, 69, 2, 2016, 487-502. doi: 10.22059/jrwm.2016.61698

HARVARD

Nabipour, Y., Vatakhah, M. (2016). 'Comparison of Different Geostatistical Methods for Estimating Rainfall in Hajighoshan Watershed', Journal of Range and Watershed Managment, 69(2), pp. 487-502. doi: 10.22059/jrwm.2016.61698

VANCOUVER

Nabipour, Y., Vatakhah, M. Comparison of Different Geostatistical Methods for Estimating Rainfall in Hajighoshan Watershed. Journal of Range and Watershed Managment, 2016; 69(2): 487-502. doi: 10.22059/jrwm.2016.61698

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