Measuring weir groove and construction method thereof

The invention belongs to the field of water resources and hydropower engineering, and particularly discloses a measuring weir groove convenient to construct and high in reliability, and a constructionmethod for the measuring weir groove. The measuring weir groove comprises a groove wall, at least two fender posts are arranged in the groove wall, the height of the fender posts ranges from 1.3 H to1.5 H, and H is the cutting depth of the measuring weir groove. According to the measuring weir groove, after the multiple fender posts are arranged in rockfill for reinforcing, the groove wall is formed, thus the stability of the groove wall in the excavation process of the measuring weir groove can be enhanced, construction safety is ensured, the requirement for the width of a construction platform due to slope settling can be reduced, and construction is convenient; meanwhile, the fender posts become one part of the measuring weir groove structure, the height of the fender posts is 1.3-1.5times of the cutting depth