Hydraulic flow measuring groove suitable for natural river channel

Abstract

The invention discloses a hydraulic flow measuring groove suitable for a natural river channel. The hydraulic flow measuring groove comprises a large groove bottom plate arranged on a riverbed betweenrevetments on the two sides of the natural river channel in the downstream direction, wherein drainage holes are evenly distributed in the large groove bottom plate; a flow measuring groove body is formed in the large groove bottom plate in the downstream direction; and the flow measuring groove body is sequentially composed of a contraction energy dissipation section, a throat straight section,a diffusion energy dissipation section and an anti-scour section in the downstream direction. The hydraulic flow measuring groove solves the problems that a mountainous river rises and falls suddenly,the river channel gradient is large, and the flow speed is large; and multiple testing manners are combined for use, the flow testing precision is guaranteed, and a testing section which is regular,stable and capable of being used once and for all is created.

Description

technical field [0001] The invention relates to hydrological flow monitoring, in particular to a hydraulic flow measuring tank suitable for natural rivers. Background technique [0002] The hydrological station is the basic unit of hydrological information collection. Due to the limitations of the water flow characteristics and topography of the test river section, the test conditions, test difficulty and automatic test methods of the hydrological test, especially the discharge test, of each hydrological station are very different. When some rivers are at low water level in the dry season or all year round, the water flow velocity is low, and it is difficult for the automatic flow test equipment to meet the test accuracy requirements. The problem of low water flow test can be well solved by constructing hydraulic weir and flume, but there are the following difficulties in using it in the hydrological department: [0003] 1. It is difficult to solve the problems of uneven fl...

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