Assessment Methods

Methods used to assess the landscape sensitivity of the Gina River catchment
Methods used to assess the landscape sensitivity of the Gina River catchment

In order to prevent soil erosion it is necessary to record soil erosion processes and to assess the factors controlling them, as well as their impact. The methods used in the investigation of the Gina River catchment are listed below (see figure):

  • mapping of soil erosion damage and several landscape factors during field survey on a map scale 1:10,000;
  • data preparation by
    • map digitising by Arc View and generation of a Digital Elevation Model on the basis of topographic maps;
    • precipitation analyses by regression-model and magnitude-frequency analyses;
  • Curve Number Method for determining direct runoff;
  • Rainfall-runoff modelling by applying the software Watershed Modelling System 6.1, HEC-1.

These listed methods can also be applied in investigations of other watersheds focusing on divergent issues and may be supplemented by additional assessment methods explained in literature and internet resources.

By using these methods the landscape characters of the individual morphological units of the Gina River catchmentwere recorded. They were supplemented by secondary data.

The results of the investigation are shown on the next web pages.

The approaches to assess soil erosion you can study by following this hyperlink.