A multi-population target flow velocity construction method for a fishway monitoring system

Abstract

The invention discloses a multi-population target flow velocity construction method of a fishway monitoring system. It includes the following steps: determine the fish species; determine the fish that have migration needs in the current fishing season according to fish research data and fishway construction requirements; determine the minimum flow velocity v of the fishway min ;The value is the induced flow velocity v in the species of passing fish fl The minimum value; determine the fishway maximum velocity v max ; Select the characteristic velocity interval v ch ;Determine the candidate velocity v of the control section ca Interval; after discretizing the variation range of fishway head and inlet flow, according to different combinations, the candidate flow velocity v of the fishway head and flow section at a certain time is calculated respectively ca‑i Interval; determine the target velocity interval of the control section v tg‑i . It has the advantages of improving the accuracy of the selection interval of the target flow velocity of the fishway, satisfying the comprehensive target flow velocity selection of various fish at different times, and effectively improving the fish passing effect of the fishway.

Description

technical field [0001] The invention relates to the field of fishway engineering, more specifically, it relates to a multi-group target flow velocity construction method of a fishway monitoring system. Background technique [0002] A fishway is a kind of fish passing structure in a dam or a sluice. It is a channel for fish to migrate. It is generally realized by building an artificial tank on the sluice or dam to maintain the natural habits of fish, thereby protecting fish resources and maintaining River biodiversity. [0003] According to incomplete statistics, there are currently more than 400 fish-passing buildings in North America and more than 1,000 in Japan; however, the construction and research history of fish-passing buildings in my country is relatively short. By the 1980s, the number of fishway facilities built in my country There are more than 40 seats; since the Gezhouba Water Conservancy Project took measures to build multiplication and release stations to solv...

AI Technical Summary

Problems solved by technology

The main disadvantages of existing methods for confirming the target flow rate of fishways are: only for a single or a small number of main fish; the confirmation of flow rate mainly depends on empirical values, and the range of flow rate is relatively rough and the accuracy is not high

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