System for measuring bed load silt discharge of river model test

Abstract

The invention relates to a system for measuring bed load silt discharge of a river model test. The system is arranged on a river model; a sand sinking pit (21) which vertically stretches downwards from an upper surface of a river sub-model is arranged on the river sub-model of the river model; at least one sand collection hopper (22) is arranged along a cross section of the river sub-model on the sand sinking pit (21); a larger opening end of each sand collection hopper (22) faces upwards and a small opening end faces downwards; a sand carrying basket (23) penetrates through the sand collection hopper (22) through a hanging rope (25) and is suspended on a weight measuring mechanism (24); and the weight measuring mechanism (24) measures underwater weight of the sand carrying basket (23) in a no-load manner and the underwater weight of the sand carrying basket (23) and the overall sand in the basket at different moments so as to obtain the bed load silt discharge of the river model test. According to the embodiment of the system, the bed load silt discharge of the river model test can be measured rapidly accurately in real time, thereby providing an accurate data basis for river research.

Description

technical field [0001] The invention relates to the field of water conservancy engineering, in particular to a system for measuring the rate of transported sediment in river engineering model tests. Background technique [0002] The river engineering model test is an important means of river research. It takes a representative section of the actual river as a prototype and scales it down to a certain scale to make a river model. Different river engineering models are used for different characteristics of the river, and then according to the actual river flow and sediment conditions, the water flow movement and sediment movement are reproduced on the river engineering model, thereby realizing the simulation of the actual river. Similar to the composition structure of the actual channel, the specific structure of the river engineering model can include: the bank sub-model and the river bed sub-model, and the river bed sub-model can include the fixed bed part of the river bed s...

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