Scholarly record

CREATION OF DIGITAL SURFACE MODELS AND DIGITAL ELEVATION MODELS FOR THE PURPOSES OF TWO-DIMENSIONAL HYDRAULIC MODELING

Vesela Stoyanova

Abstract

Over the last decades, river floods in the world are more common causing more and more human and economic damage. Understanding the Processes causing floods and developing simulation models to assess the threat floods are important issues. In this regard, the use of two-dimensional hydraulic models for flood simulation in areas with complex topography and infrastructure where additional information is needed to differentiate the flood threat is extremely convenient and gives more accurate and detailed results from one - dimensional models. This paper presented methods and approaches for creating Digital Surface Models and Digital Elevation Models for the purpose of a two-dimensional hydraulic model. The information needed to create the mesh in this model is considered and methods and approaches for collecting this information are presented. Detailed description of the Drone survey method, and processing of digital information from it to create Digital Surface Models and Digital Elevation Models. Two of the most up-to-date methods for creating Digital Surface Models and Digital Elevation Models are compared - Drone and LiDAR (Light Identification Detection and Ranging).

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