Utilization of geographic information systems (GIS) for the erosion vulnerability analysis of agricultural land is shown on the example of Luh stream catchment, Czech Republic, district of Vysočina. Evaluation of soil erosion conditions according to the Universal soil loss equation (USLE) was done in ArcGIS 10 Desktop, software product of ArcInfo using a set of integrated software applications ArcMap, ArcCatalog and ArcToolbox user interface with LS-converter and USLE2D programs. The project of erosion control measures and evaluation of their effect on the erosion were parts of the analyses. Erosion control crop rotations with soil protective technologies, that change the value of cover-management factor, were used as erosion control measures. ...
The vulnerability of soil by wind erosion using the wind erosion equation (WEQ) in geographic information systems (GIS) was demonstrated on the cadastral area of Přísnotice, southeast of the Czech Republic. Raster layers were created for input factors of WEQ and potential soil loss by wind was calculated using the Raster Calculator. Subsequently, map outputs showing the potential vulnerability of soil to wind erosion were made. In the first variant, where the protective effect of the barriers was not taken into account, the wind erosion intensity reached 47.6 t.ha-1.year-1. In the second variant, where the protective effect of the barrier was assumed, the loss of soil was lower, the maximum value was 4.7 t.ha-1.year-1. The soil loss limit was exceeded, even in a situation where a relatively high protective barrier effect has been proposed. The advantage of determining of wind erosion vulnerability using ArcGIS is that it is possible to identify particular parts of soil blocks from the map outputs, which are the most vulnerable. Similarly, it is possible to design a windbreak network and simulate its protective effect using ArcGIS. ...
