USING TERRESTRIAL LASER SCANNING SURVEYING TECHNIQUES TO CAPTURE THE CHANNEL MORPHOLOGY CHANGE AFTER HIGH FLOWS

The monitoring of the stream’s geometry and its temporal or permanent alterations are of high importance in order to understand the process of fluvial geomorphology and to plan river restoration or management activities. Terrestrial laser scanning has been widely used as a method for high-resolution monitoring of fluvial geomorphology. To test the method, we selected four sites to be captured that represent different flow conditions, specifically perennial, intermittent and ephemeral flow. All of them are typical of the Aggitis basin and entire Greek territory. We hypothesized that heterogeneity would increase between adjacent plots in each site and among all sites. Fluvial geomorphologic changes were recorded in all sites, particularly in sites where vegetation was limited or absence. TLS was highly helpful for the fluvial geomorphologic mapping especially in torrential sites (absence of limited water resources) and sparse vegetation.