Method for determining optimal diversion flow of estuary vein-shaped river network trunk stream

Abstract

The invention discloses a method for determining the optimal diversion flow of estuary vein-shaped river network main stream. The method is divided into four parts: 1, investigating and collecting river network plane distribution and river geometric characteristics, and determining a river network main stream weighted slope and a weighted river width; 2, determining key hydraulic factors of the section of the entrance, wherein the key hydraulic factors comprise the relation between the tidal range and the maximum flux and ebb flow per unit width, the maximum water depth, the minimum water depth, the maximum flux flow velocity and the maximum ebb flow velocity of the entrance; 3, determining the on-way distribution rule and peak value of the maximum average emission concentration and emission flow of the ammonia nitrogen of the main stream pollution source; and 4, determining the optimal diversion sewage flushing flow and the corresponding maximum average ammonia nitrogen concentration of the main stream. The invention relates to a method for determining the optimal diversion flow of an estuary vein-shaped river network main stream, provides a diversion flow solving method for weakening the optimal effect of ammonia nitrogen concentration of river pollutants under the complex tidal current and runoff game condition, and solves the core technical problem that water diversion and drainage are used as the most quick, economical and feasible method for improving the plain river network water pollution problem.

Description

technical field [0001] The invention relates to the fields of hydraulics and river dynamics, in particular to a method for determining the optimal diversion flow rate of the main stream of a vein-like river network in an estuary. Background technique [0002] my country has a vast territory, developed water systems, and dense river networks. With the rapid development of social economy and the acceleration of urbanization, the problem of pollutant control in river networks has become increasingly prominent. According to incomplete statistics, as of 2016, 295 prefecture-level and above in the country Among the cities, 1,811 black and odorous water bodies were found in 216 cities. River network pollutant control has become a major ecological issue related to social civilization, urban development, and people's health. Source control and sewage interception is the most fundamental measure to improve the water environment of river networks, but it is difficult to implement. Wate...

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