Automatic measuring system of phreatic water evaporation

Abstract

The invention provides an automatic measuring system of phreatic water evaporation, which measures in a direct mode. The automatic measuring system comprises a water storage tank, a water supply tank, a rock-soil cylinder and an impounding reservoir which are connected or joined in turn through a pipeline to form a circulation, wherein the rock-soil cylinder is a cylindrical container with rocks and soil inside, a plurality of water outlets are vertically arranged on the cylindrical surface of the rock-soil cylinder and are joined with a water collection tipping bin of a tipping flow measuring device, and water discharged by the flow measuring device gets into the impounding reservoir and is supplemented into the water storage tank by a water pump arranged through a circulating pipeline. The automatic measuring system, according to a dynamic water budget principle, measures the speed of the phreatic water evaporation under different water level embedded depth conditions by using a constant pressure water supply device and an automatic measuring technique of the tripping flow measuring device and by automatically measuring the outlet flows at different parts of the rock-soil cylinder, thus the automatic monitoring of hydrological data becomes possible and the measurement accuracy is greatly improved. The measuring system has a simple structure and convenient running and management.

Description

technical field [0001] The invention relates to a submersible evaporation automatic measurement system and a measurement method, which are mainly used for studying the evaporation amount and evaporation process of diving in mountains or plains, and belong to the technical field of small-scale hydrological data measurement equipment for agricultural water saving and storage. Background technique [0002] At present, the device used to measure submerged evaporation is mainly a lysimeter, which calculates the total amount of evaporation and the evaporation process by directly measuring the water level change in the lysimeter; The water level changes at different times are used to calculate the evaporation rate and total evaporation at different times; compared with the first method, although the constant pressure automatic water supply is realized, this method still does not get rid of the traditional idea of ​​calculating the evaporation process by measuring the water level, an...

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Problems solved by technology

[0002] At present, the device used to measure submerged evaporation is mainly the lysimeter, which calculates the total evaporation and the evaporation process by directly measuring the water level change in the lysimeter; The water level changes at different times are used to calculate the evaporation rate and total evaporation at different times; compared with the first method, although the constant pressure automatic water supply is realized, this method still does not get rid of the traditional idea of ​​calculating the evaporation process by measuring the water level, and cannot be used for diving. Automatic, continuous and accurate measurement of evaporation process

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