Calculation method for automatically monitoring water surface evaporation capacity by active drainage method

Abstract

The invention discloses a calculation method for automatically monitoring water surface evaporation capacity by an active drainage method. A side water bucket is arranged on one side of a standard evaporator or an E601B evaporator, and the side water bucket is communicated with the standard evaporator at a proper height by a communicating pipe. E is equal to (V1-V2) / phi-V2 / F, and Z2 is equal to Z1-E-V2 / F, wherein phi and F are constants, and Z10 is an initial water level constant of the evaporator; then Z2 of the day is assigned to Z10 to serve as an initial water level of the day; and V1 andV2 at 8 o 'clock of the previous day and 8 o' clock of the next day can be obtained through the side water bucket and a matched automatic monitoring device, so that the daily evaporation capacity of the previous day and the initial water level of the day can be calculated. The invention provides a principle and a method for automatically monitoring the evaporation capacity by utilizing the side water bucket and the matched weighing device for calculation for the first time, so that the innovation of the calculation method is realized, and important basic theories and method supports are provided for further realizing automatic monitoring of the water surface evaporation by utilizing the method.

Description

Technical field: [0001] The invention relates to a hydrological monitoring technology, in particular to a calculation method for automatically monitoring water surface evaporation by an active drainage method. Background technique: [0002] Water surface evaporation observation is one of the important contents of hydrological and meteorological monitoring. According to the requirements of "Specifications for Water Surface Evaporation Observation" (SL 630-2013), the standard water surface evaporator (namely E601B evaporator) is used as a routine equipment for water surface evaporation observation. The mouth area of ​​the standard water surface evaporator is 3000cm 2 , about 618mm in diameter and 687mm in height. It consists of an evaporator, a water circle, a measuring device, and an overflow cylinder. The key links and main operations of daily artificial evaporation monitoring work have four aspects: First, when the water level in the evaporator drops a lot, replenish wat...

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Problems solved by technology

Fourth, due to the high temperature in summer, the water in the evaporator is easy to decay and deteriorate, and mucus grows, which affects the accuracy of observation, so the water should be changed regularly

Although the theoretical accuracy of current displacement sensors such as magnetic displacement, grating, infrared, capacitive grid, and radar is very high, when they are applied to the measurement of water level changes, due to the influence of the physical characteristics of the water body and the environment, they cannot meet the measurement requirements under the current conditions. Therefore, the existing automatic evaporation system is basically in the stage of experimental exploration and cannot be popularized and applied in actual production.

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