wAbstract
@Soil erosion is a growing problem in southern Greece and particularly
in the island of Crete, the biggest Greek island with great agricultural
activity. soil erosion not only decreases agricultural productivity,
but also reduces the water availability. In the current study,
an effort to predict potential annual soil loss has been conducted.
For the prediction, the Revised Universal Soil Loss Equation (RUSLE)
has been adopted in a Geographical Information System framework.
The RUSLE factors were calculated (in the form of raster layers)
for the nine major watersheds which cover the northern part of
the Chania Prefecture. The R-factor was calculated from monthly
and annual precipitation data. The K-factor was estimated using
soil maps available from the Soil Geographical Data Base of Europe
at a scale of 1:1,000,000. The LS-factor was calculated from a
30-m digital elevation model. The C-factor was calculated using
Remote Sensing techniques. The P-factor in absence of data was
set to 1. The results show that an extended part of the area is
undergoing severe erosion. The mean annual soil loss is predicted
up to `200 (t/ha year-1) for some watersheds showing
extended erosion and demanding the attention of local administrators.
Keywords: Soil erosion; RUSLE; GIS; Remote sensing; Western Cretex
Introduction
Study site
Materials and methods
@Soil erosion prediction by RUSLE
@Data
@Rainfall erosivity factor (R)
@R-factor estimation
@Soil erodibility factor (K)
@Slope-length (L) and slope steepness (S) factors
@Cover management factor (C)
Results and discussion
@Rainfall erosivity factor
@Soil erodibility factor
@LS factor
@Cover management factor
@Soil loss
Conclusions
Acknowledgments
References