Method and device for collecting multi-layer soil water sample

Abstract

The invention discloses a method and a device for collecting multi-layer soil water samples. The method comprises the following steps of: conveying the water samples collected by a sampling tube in the soil of different depths to a corresponding water dividing bin in a water dividing tank by a first pumping device; and conveying the water samples in the water dividing bin to a corresponding watercollecting tube by a second water pumping device. The sampling tube is sealed, and a number of clay heads are arranged on the tube wall for infiltrating the soil water. The pumping device is controlled by a microcomputer, so that the various components work together to effectively collect the soil water samples of different soil depths. The efficiency of collecting groundwater samples is improved,and batch, differential, and simultaneous water sample collection can significantly improve the accuracy of batch sampling time intervals and improve the accuracy of test data. The automatic, regularor preset time water sample collection can be realized by the microcomputer, which greatly reduces the difficulty of manual collection, and the situations that water samples cannot be collected manually and the collected water samples are mixed due to natural weather and other factors can be avoided, which bring great significance to the progress of isotope hydrology.

Description

technical field [0001] The invention relates to a method and device for collecting water samples, in particular to a method and device for collecting multi-layer soil water samples, and belongs to the technical field of isotope hydrology research. Background technique [0002] At this stage, the shortage of water resources has increasingly become a hot issue of social concern. Many studies have focused on flood and drought forecasting, but there is a lack of research on the path of runoff reaching the outlet section. [0003] In the process of exploring the runoff path, hydrologists found that soil water has a considerable impact on the runoff production of the watershed, and also found that the influencing factors affecting soil water movement are complex and changeable. These factors can be broadly summarized as follows: [0004] 1. The impact of urbanization; all countries in the world are now advancing the process of urbanization. The continuous expansion of cities mak...

AI Technical Summary

Problems solved by technology

[0005] 2. Changes in global climate; in recent years, global warming has led to more and more significant impacts of El Niño and La Niña phenomena, and the impact of extreme precipitation and extreme drought has become more and more important; it is difficult to apply historical data to the current record of extreme events Research on Confluence of River Basins

[0008] At present, there are many defects in the process of collecting soil water and water samples by negative pressure method: 1. The interval control of sampling time is not accurate enough. When we collect soil water with different soil depths, due to the limited number of test personnel, we cannot simultaneously collect Soil water, which may lead to various problems in data processing in the later stage; 2. Representativeness problem: Usually, a section is selected for collecting soil water, and the extraction of upper soil water will affect the collection of lower soil water. 3. The difficulty of manual sampling: in the selection of test watersheds, areas with less impact from human activities are usually selected, and these areas are often far away from urban areas, so long-term sampling is also very difficult for sampling personnel. challenge

Images