Urban sediment management (Phase II) – Optimization of a sand trap
Abstract
Already in the first project phase, the sand trap in Wertheimsteinpark (1190 Vienna) was investigated in a physical model test on a scale of 1:10 with regard to hydraulic functionality. It was assumed that the accumulated sediment in the sand trap would be discharged into the following sewer section (right main sewer RHSK) at higher flow rates. The discharged sediment then silt up in the RHSK. In the model tests, an asymmetrical distribution of the flow at a natural flow rate greater than 2.5 m³/s could be determined due to the geometry (expansion) at the beginning of the sand trap. As a result, only one of the two sedimentation basins located in the sand trap flows through, resulting in increased flow velocities and sediment discharge in that basin. The objective of the second project phase is to distribute the flow at the beginning of sand trap evenly, even with increased flow rates, in order to increase the sedimentation effect in the sand trap. This requires a detailed investigation of the flow conditions in the expansion area and the resulting effects on sediment dynamics.
keywords sand trap hydraulic optimization physical model bed load transport
Publikationen
Project staff
Helmut Habersack
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Dr.h.c. Helmut Habersack
helmut.habersack@boku.ac.at
Tel: +43 1 47654-81901, 81911
Project Leader
02.07.2018 - 01.02.2019