 |
| Titel |
Effects of land use on annual runoff and soil loss -a meta-analysis of a European and Mediterranean plot database- |
| VerfasserIn |
W. Maetens, J. Poesen, M. Vanmaercke |
| Konferenz |
EGU General Assembly 2012
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250059389
|
|
|
|
|
|
| Zusammenfassung |
| Runoff and soil loss caused by water erosion are important desertification processes. While
previous studies have shown the important effect of land use on annual soil loss (SLa),
quantification of these effects based on field-measured data is limited and the effect of land
use on annual runoff (Ra) and the relation between Ra and SLa has largely been neglected in
the past. Nevertheless, runoff generation plays an equally important role as soil loss in
desertification, especially in drier areas, where water is a key resource. Hence, sustainable
land management practices to mitigate interrill and rill erosion should also consider the
effects on runoff.
Therefore, in the framework of the FP6 project DESIRE (http://www.desire-project.eu),
the largest currently available database of plot runoff and soil loss data in Europe and the
Mediterranean was compiled to investigate effects of land use on Ra, annual runoff
coefficient (RCa) and SLa. This database comprises 227 plot-measuring sites in Europe and
the Mediterranean, with SLa for 1061 plots (PL) representing 7 234 plot-years and Ra for
807 PL representing 5 357 plot-years. Bare soil, vineyards and tree crops were found to have
high mean RCa (5-10 %) and mean SLa (10-20 Mg.ha-1.yr-1). Cropland and fallow show
similar mean annual RCa (8.0 and 7.3 %), but lower SLa (6.5 and 5.8 Mg.ha-1.yr-1). Plots
with (semi-)natural vegetation cover show the lowest mean annual RC ( |
|
|
|
|
|
|