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A device and monitoring method for monitoring riparian zone subsurface exchange rate

A technology of exchange rate and riparian zone, applied in measurement devices, instruments, surface/boundary effects, etc., can solve the problems of lack of a clearer device for monitoring the rate of undercurrent in riparian zones, and few research results.

Active Publication Date: 2019-10-29
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the domestic application of temperature tracing in the study of riparian subsurface layer is still in its infancy, and relevant research results are still few, and there is no clear device for monitoring the rate of riparian subsurface flow.

Method used

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  • A device and monitoring method for monitoring riparian zone subsurface exchange rate
  • A device and monitoring method for monitoring riparian zone subsurface exchange rate
  • A device and monitoring method for monitoring riparian zone subsurface exchange rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0059] A device for monitoring the exchange rate of subsurface flow in the riparian zone, the overall length can be determined by the test plan, and the present embodiment takes 2.4m as an example;

[0060] Because the device needs to be buried in the ground for a long time, the PPR tube monitoring well 1 chooses non-toxic, light weight, pressure-resistant, and corrosion-resistant PPR tube as the monitoring well. The length is 224cm, the inner diameter is 7cm, and the outer diameter is 8cm. It is designed as a smooth bottom cone 2 with a cone height of 10cm. Exchange holes 3 with a diameter of 1cm are drilled at intervals of 15cm on the side wall of the PPR tube monitoring well 1. In order to avoid blockage of the exchange holes, the whole device is placed in a 2.3m diameter 8cm filter sleeve, so that the groundwater can infiltrate into the PPR pipe monitoring well 1 through the exchange hole, so as to realize the smooth exchange with the external groundwater flow;

[0061] Th...

specific example

[0067] According to the water level data, the saturated zone and the unsaturated zone of riparian subsurface exchange are distinguished. VFLUX and MATLAB calculation programs are used to calculate the subsurface exchange rate in the riparian zone. The specific examples are as follows:

[0068] The calculation method will be described in detail below in conjunction with the accompanying drawings and specific embodiments

[0069] Taking the characteristic parameters of the riparian zone soil in the actual project, as shown in Table 1, using the solution method of the riparian zone subsurface flow exchange rate based on the temperature time series data, the 1.70m in the riparian zone subsurface layer from March 26, 2012 to November 4, 2012 was calculated. (shallow part) and 2.75m (deep part) of the flow velocity between the deep measuring points, in order to ensure that the results of the numerical simulation can be of guiding significance to the actual engineering, the riparian ...

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Abstract

The invention discloses a device for monitoring the subsurface flow exchange rate at a riparian zone. The device comprises a PPR pipe monitoring well, a plurality of exchange holes are uniformly formed in the side wall of the PPR pipe monitoring well, a data collector device is fixedly connected to the top end of the PPR pipe monitoring well, a lower-end cylindrical pipe body is fixedly connectedbelow the data collector device, a pressure sensor is arranged at the lower end of the outer wall of the lower-end cylindrical pipe body, a plurality of temperature sensors are further uniformly arranged on the outer wall of the lower-end cylindrical pipe body and are located above the pressure sensor, and the pressure sensor and the temperature sensors are connected with the data collector devicethrough data lines correspondingly. According to the device for monitoring the subsurface flow exchange rate at the riparian zone, the temperature and the water level are measured through the temperature sensors and the pressure sensor correspondingly, the water level and the water temperature can be monitored in real time through an intelligent data collector, and the trouble of collecting dataon site is eliminated. The invention further discloses a method for monitoring the subsurface flow exchange rate at the riparian zone by adopting the device.

Description

technical field [0001] The invention belongs to the technical field of monitoring devices for water conservancy projects, and relates to a device for monitoring the exchange rate of subsurface flow in a riparian zone. The invention also relates to a method for monitoring the exchange rate of undercurrent in a riparian zone by using the device. Background technique [0002] As the transition zone between aquatic habitat and terrestrial habitat, the riparian zone has unique vegetation, geology, topography and hydrology characteristics, and is affected by changes in surface water and groundwater levels. The area where surface water exchanges heat with groundwater through the riparian sediment layer is called the riparian subsurface layer. As an intuitive carrier of energy, temperature is a characterization factor that can reflect the temporal and spatial changes of the subsurface exchange process. It is easy to observe and non-polluting, and has certain advantages as a natural ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00G01D21/02
CPCG01D21/02G01N13/00
Inventor 任杰王大博杨杰张文兵陈建琪
Owner XIAN UNIV OF TECH