Estimating and Mapping Torrentiality Risk in Small Forested Watersheds

Abstract

The torrentiality degree is a useful indicator in classifying the priority of the proposed torrent control activities in torrential watershed management. The paper analyses and proposes a method for estimation of torrentiality degree of a small torrential watershed, which is improved by using geospatial referenced data incorporated in a geographic informational system. The materials used in estimating the torrentiality degree are all geospatially referenced data extracted from a digital elevation model and from the forest management database of the area, reducing the necessary processing time. For calculation of the peak discharge the standard morphometric diagram’s analytic formula was used.