DOI: 10.17632/jk4c22gv4t.1
title: Experimental dataset on water levels in the study of dam downstream semi-circular obstacles’ influence on multiphase floods arising from the silted-up dam-break with 50 to 80% reservoir silting

description: Experimental dataset of free surface water level: In this file, 4500 water level data points associated with 15 different dam break scenarios were extracted from high-quality experimental video images. The dataset are collected, classified and presented a total of 15 tables in 5 categories based on the initial upstream sediment depths; 15, 17.5, 20, 22 and 24 cm. The upstream reservoir was initially silted-up with 50 to 80% reservoir silting degrees (in respect to 30 cm height of the upstream reservoir). The radiuses of downstream semi-circular obstacles were 0, 4.5 and 7.5 cm. Tables 1, 2 and 3, present the free surface water level data at 20 different locations along the flume and 15 snap times after the dam break, while initial upstream sediment depth was 15 cm and the radiuses of downstream semi-circular obstacle were 4.5, 7.5 and 0 cm respectively. Tables 4, 5 and 6, provide the free surface water level data at all abovementioned sections and snap times, while initial upstream sediment depth was 17.5 cm and the radiuses of downstream semi-circular obstacle were 4.5, 7.5 and 0 cm respectively. Tables 7, 8 and 9, provide the free surface water level data at all abovementioned sections and snap times, while initial upstream sediment depth was 20 cm and the radiuses of downstream semi-circular obstacle were 4.5, 7.5 and 0 cm respectively. Tables 10, 11 and 12, provide the free surface water level data at all abovementioned sections and snap times, while initial upstream sediment depth was 22 cm and the radiuses of downstream semi-circular obstacle were 4.5, 7.5 and 0 cm respectively. Finally, tables 13, 14 and 15, provide the free surface water level data at all abovementioned sections and snap times, while initial upstream sediment depth was 24 cm and the radiuses of downstream semi-circular obstacle were 4.5, 7.5 and 0 cm respectively. The unit that has been used to measure data is centimeter and the abbreviations including O_r and S_d are the radiuses of downstream semi-circular obstacles and upstream initial sediment depth, respectively. Time also refer to the time snaps after sudden removal of the gate using second as a unit of measurement. It should be noted that the vertical column on the left of the tables indicates the distances of different locations in centimeter from the beginning point of the laboratory flume. So, L column indicates all 20 distinct locations along the flume and their distances from the reservoir beginning in centimeter as a unit of measurement. Affiliations: 1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. foad.vosooghi@gmail.com 2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. 3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.