DOI: 10.5593/sgem2012/s20.v5084


Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 5, 627 - 634 pp


Erosion of agricultural soils due to water action represents an important factor which
decisively contributes to diminishing crops, reducing soil general quality and
diminishing landslides. In order to optimize the actions designed to prevent and reduce
surface erosion effects on slope fields, having the prognosis of major rainfalls or
knowing the years in which high erosivity rainfalls were present represent forefront
useful factors. Rain erosivity, as a factor intervening in calculation of slope field rain
erosion, can be estimated by measures of Fournier index, Fournier modified index, or
through rain concentration index. The article presents results concerning the setting up
of some prognoses on rainfalls high erosivity, starting from the experience of the
previous monthly average rainfalls during 1936 – 2011. In order to obtain these
predictions, the Fourier analysis of rainfalls history and Fournier index history, Fournier
modified index and rain concentration index history, are used. Such a prognosis is
aimed to evaluate soil losses and establish the optimum moments to intervene upon
factors able to diminish the phenomenon. At the same time, because of the great period
on which the calculus is made, significant in terms of climatology, certain conclusions
constitute a base of discussions for observing the eventual climate changes. Therefore,
personal observations on possible estimators of climate changes are formulated.
All the considerations have been made on the concrete case of rainfalls in Valea
Călugărească vineyard, Prahova county, Romania.

Keywords: erosion, erosivity, prognosis, rain, soil