Underground water level monitoring and automatic sampling storage device and method

Abstract

The invention belongs to the field of farmland hydrology and water environment and particularly relates to an underground water level monitoring and automatic sampling storage device and method. The device comprises a monitoring well, an automatic water level monitoring system, a power supply system and an automatic water sample sampling and storing system, wherein the monitoring well comprises an outer well (1), an inner well (2), a well lid (3) and filter sand (4); the automatic water level monitoring system comprises a well rope (5) and a self-recording water level gauge (6); the power supply system comprises an inverter (17), a storage battery (18), a power supply controller (19) and a solar cell panel (20); the automatic water sample sampling and storing system comprises a first water pump (8), a second water pump (7), a first water pump water outlet pipe (9), a second water pump water outlet pipe (10), a water outlet pipe bracket (11), a small refrigerator (12), a stepping motor (13), a circular sample clamping groove (14), a container bottle (15) and a programmable controller (16). The device is wide in application range and can be applied to water level and water quality monitoring of most underground water.

Description

Technical field [0001] The present invention relates to the automatic monitoring of groundwater, specifically a groundwater level monitoring and automatic sampling preservation device and method, belonging to the field of farmland hydrological and water environment. Background technique [0002] Groundwater is an important part of water resources. Its buried variation has an important impact whether there is an important impact on the development of farmland water conversion, moisture consumption, or forest, wasteland, lake and other ecological landscapes. Some of the drought semi-drying irrigation districts in northwest of my country, small rainfall, large evaporation, depth of groundwater, and the amount of salt containing soil saline and groundwater resources. In addition, with my country's strengthening of ecological environment protection, agricultural parallel pollution is also generally concerned. Excessive fertilizer input and unreasonable irrigation methods in agricultur...

AI Technical Summary

Problems solved by technology

[0003] Groundwater monitoring requires the monitoring of multiple elements such as water level, salinity, pH value, and nitrogen and phosphorus content. Traditional manual sampling is time-consuming and laborious. It is necessary to develop automatic monitoring and sampling technology

At present, automatic monitoring products for groundwater level and salinity have become mature and widely used, but automatic monitoring products for monitoring groundwater nitrogen and phosphorus content, pH value and other items still face problems such as inability to monitor or low monitoring accuracy, and high monitoring costs. , in order to realize the monitoring of nitrogen and phosphorus content in groundwater, it is also necessary to collect water samples

Various existing groundwater monitoring and sampling devices, such as Chinese patents "A kind of farmland shallow groundwater level, water quality on-line monitoring and automatic sampling system (CN201721246244)", "A kind of groundwater automatic monitoring equipment (CN201610532852)" although using various sensors It partially solves the problem of water quality monitoring, and can also conduct a single sampling of groundwater. However, in actual regional scale groundwater monitoring, a large number of sampling points are often required, and most of them only need water quality monitoring data at a certain interval (such as 7d, 10d). Since each sensor can only monitor a single item, relying heavily on sensors will not only lead to incomplete monitoring of water quality elements, but also greatly increase monitoring costs

Although the existing automatic sampling technology can achieve a single sampling, it can neither meet the requirements of long-term automatic sampling and the refrigerated storage of samples such as nitrogen, phosphorus content, and salinity at 4°C, nor does it take into account the hysteresis exchange between the groundwater in the observation well and the actual groundwater. question

Images