Assessing and Determining the best rainfall erosivity indices in Kermanshah Province

Document Type : Research

Authors

1 Assistant professor of agriculture and natural resources research and education center, ‎Kermanshah, Iran‎

2 Professor of soil conservation and watershed management research institute, Tehran Iran

3 Scientific board of agriculture and natural resources research and education center, ‎Kermanshah, Iran‎

Abstract

The effective energy for erosion is called rainfall erosivity, which is rainfall erosion potential and depends on ‎rainfall physical characteristics. Different indices have been developed to quantify the rainfall erosivity. In this ‎research, study fields were conducted in Kermanshah provinces. The study site was Kaboudeh soil conservation ‎research station and two types of land uses were selected for the study including 24 established runoff and sediment ‎plots. The sites were equipped with digital rain gauges, thus necessary rainfall data were collected and used.  Based ‎on literature review, 11 rainfall erosivity indices were  identified to fit more for erosivity so their efficiency were ‎checked on the study. Best erosivity indices were selected by determination of correlation coefficient between the ‎amount of erosion in each single storm and calculated rainfall erosivity indices. The results indicated that the best ‎index for the study sites was EI60 and AI30 that has maximum correlation coefficient with soil loss.

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History

  • Receive Date: 19 November 2013
  • Revise Date: 15 March 2014
  • Accept Date: 21 May 2014

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