Determined of Rainfall Erosivity Indices (EI30, Lal, Hudson and Onchev) for Namak Lake Basin

Subject Areas : Journal of Crop Ecophysiology

Z.T. Alipour ¹ , M.H. Mahdian ² , S. Hakimkhani ³ , M. Saeedi ⁴

1 - Assistant professor, Damghan Branch, Isamic Azad University, Damghan, Iran
2 - Assistant professor of Agricultural Research, Education Organization, Iran
3 - Assistant professor, University of Urmia, Urmia, Iran
4 - Staff Member, Faculty of Agriculture and Natural Resources,University of Tehran, Karaj, Iran

Received: 2010-12-31 Accepted : 2011-06-08 Published : 2010-08-23

Keywords: EI30, Namak Lake Basin, Rainfall erosivity,

Abstract :

In this research the indices EI30, AIm,‎ KE>1‎ as well as P/√t‎ were determined for 16 pluviograph as well as for 3 Namak Lake Basin nearby stations. Regression relationships were established between the dependent variables of EI30, AIm, KE>1‎ as well as P/√t‎ Indices and other easily accessible rainfall indices of: fournier, modified fournier, maximum monthly rainfall, maximum daily rainfall, standard deviation of monthly and annual rainfall as well as pluviometer site elevations. This made the establishment of appropriate relationships between rainfall intensity dependent indices and the dependent variable of rainfall intensity (at stations where intensity was non-existent) possible. In the next step, the indices as well as easily accessible rainfall data from pluviograph stations were exploited to find out EI30 ,AIm ,‎ KE>1‎ as well as P/√t‎ indices, while using the previously obtained regression relationships.