THE BOULDER CHUTE DESIGN WITH A STILLING BASIN AND INTAKE FACILITY VERIFIED BY A HYDRAULIC MODEL

Abstract

During development, flows are formed within the route and gradient conditions by trough-forming processes. Sensitive changes of the landscape and interventions in the water flows caused mainly in the last century in Czechia and the pressure of agricultural management are the cause of major changes in flows and more frequent occurrences of hydrological extremes. These phenomena cause problems in the form of migration permeability, higher pollution concentrations or higher water temperatures. The aim of the paper was (I) to design a boulder chute with a stilling basin and an intake facility, (II) to model the design in a 3D model into an existing terrain model and (III) to verify the suitability of the design using a hydraulic model in a complex solution of small water reservoir restoration. The digital terrain model was modeled on the basis of a detailed focus in the Atlas software. The designed boulder chute with the still basin and the intake facility was manually added to the terrain model to the existing side pond. The hydraulic modeling in the stream was realized by a 1D model in the HEC � RAS program, both for the existing and for the design state. The case study was applied to the Skalicka small water reservoir in the Czech Republic. The result is whether the design has improved the hydraulic conditions of the unsatisfactory condition of the stream, and further the results form the basis for a comprehensive reconstruction of the existing small water reservoir.