Calculation method for automatic monitoring of water surface evaporation by active drainage method

Abstract

The invention discloses a calculation method for automatically monitoring water surface evaporation by an active drainage method. A side bucket is arranged on one side of a standard evaporator or an E601B evaporator, and a connecting pipe is used at a proper height to communicate with the standard evaporator. Using E=(V 1 -V 2 ) / Φ‑V 2 / F and Z 2 =Z 1 -E-V 2 / F, where Φ and F are constants, Z 10 is the initial water level constant of the evaporator, after which Z 2 assigned to Z 10 As the initial water level of the day, the V at 8:00 of the previous day and 8:00 of the next day can be obtained through the side bucket and its matching automatic monitoring device. 1 , V 2 , so that the daily evaporation of the previous day and the initial water level of the day can be calculated. This invention proposes for the first time the principle and method of automatically monitoring evaporation calculation by using side buckets and matching weighing devices, realizing the innovation of calculation methods, and providing important basic theory and method support for further using this method to realize automatic monitoring of water surface evaporation .

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 the "Water Surface Evaporation Observation Specification" (SL630-2013), the standard water surface evaporator (ie 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 water to ...

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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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