Prof. dr hab. inż. Artur Radecki-Pawlik

Mgr inż. Karol Plesiński

Mgr inż. Bartosz Radecki-Pawlik

Block ramp rebuilding and exploitation problems: chute stone dimension choosing; upstream the ramp river channel erosion

The paper shows a rebuilding example of drop hydraulic structure which was changed into the block ramp hydraulic structure. Artificial roughness of a slope plate of the block ramp was reached by placing cobbles along the chute slope. The dimension of cobbles was calculated applying different methods and the optimum value for that dimension was chosen. Also the diagram of Radecki-Pawlik et al. 2015 was used. Finally we are showing the distribution of velocities and shear stresses upstream of the block ramp for exploitation and river channel bed protection reason to give the information on the possible erosion process there and seek some suggestions for river bed protections. The work was carried on in Polish Carpathians on the Brennica River. ...

Prof. dr hab. inż. Artur Radecki-Pawlik

Dr inż. Karol Plesiński

Mgr inż. Bartosz Radecki-Pawlik

Mgr inż. Wiktoria Czech

BLOCK RAMPS (BR) MADE OF NATURAL SANDSTONE RAPID HYDRAULIC STRUCTURES (RHS) OF PETERKA TYPE: STONE DIMENSION CALCULATIONS, A COMPARATIVE STUDY

The paper presents results of hydraulic modelling of block ramps (BR) made of natural stones (seven constructional solutions) and compares them with the results of classical research by Peterka. The main aim of the paper is to provide a simplified solution to determining the dimension of stones fixed to the sloping apron of the BR in order to reduce energy of flowing water along the ramp. This new way of assessing the dimensions of stones along BR sloping apron is presented with proposals on how to calculate stone dimension. The paper is dedicated to hydraulics engineers, scientists, designers, practitioners and also to researchers in the field of low-head hydraulic structures. ...