Comparison of different techniques for generating DEM for analysis of hydraulic risk territories with LIDAR

Aim of this paper is investigation of a possible use of the technique of LIDAR topographic survey for updating existing hydraulic models for the calculation of Hydraulic head for risk areas. Specifically, this study intends to assess the benefits to be gained from new methods of LIDAR detection comparing calculations and simulations of updated models with those obtained from existing models, highlighting the critical issues of the use made for hydraulic analysis. We also carried out a comparison on the accuracy obtainable from DEM generated with different methods of acquisition and processing.