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Method for detecting fresh and old water in overland flow and interflow

A technology of soil flow and slope surface flow, which is applied in the direction of testing water, soil material testing, material inspection products, etc., to achieve the effect of high accuracy and small limitations

Active Publication Date: 2020-02-28
安徽省(水利部淮河水利委员会)水利科学研究院(安徽省水利工程质量检测中心站)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Many methods have been applied to study the hydrological process of soil water (such as real-time soil moisture monitoring, ground penetrating radar technology, resistivity imaging method), but these methods are affected by complex terrain, soil heterogeneity, vegetation, scale and other factors. Continuous monitoring of soil flow research has certain limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for detecting new and old water of slope flow and soil flow comprises the following steps:

[0023] Step 1. Each time the artificial rainfall simulation system simulates rainfall, different tracers of equal concentration are added to it to build a soil tank model to simulate the process of runoff generation and confluence on the slope.

[0024] Step 2, adjust the underlying surface conditions of the soil tank, regularly collect the water samples of the surface runoff of the soil tank model under different underlying surface conditions and the water flow in the soil at different depths during each rainfall, and detect various indicators in the water samples. concentration of the tracer.

[0025] Step 3. According to the content of the tracer, the ratio of new water (water replenished in a rainfall runoff event) and old water (moisture stored in the soil or on the surface before rainfall) under different conditions in the soil channel model is obtained. Ratio,...

Embodiment 2

[0027] The underlying surface conditions mentioned in Example 1 include soil type, slope, vegetation coverage and soil water content before rain.

Embodiment 3

[0029] In Example 1, a different tracer of the same concentration was injected into each artificially simulated rainfall, and the initial soil moisture content before each rainfall was the same, wherein, the first simulated rainfall was injected with tracer t 1 , the second simulated rainfall drop tracer t 2 ;Similarly, when n≥2, the nth simulated rainfall drops tracer t n ; The water replenished in the nth rainfall runoff event is new water, and the water stored in the soil or on the surface before the nth rainfall is old water.

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Abstract

The invention relates to a method for detecting fresh and old water in an overland flow and an interflow. The method belongs to the technical field of water conservancy detection. According to the method, a fresh / old water ratio of the overland flow and the interflow is calculated, and moisture sources of the overland flow and the interflow is further deduced; the fresh / old water ratio of the overland flow and the interflow is derived by measuring the content of a tracer agent in a water sample; and the precision of the new / old water ratio of the of the overland flow and the interflow obtainedby adopting the method is high.

Description

technical field [0001] The invention relates to a method for detecting old and new water of slope flow and soil flow, and belongs to the technical field of water conservancy detection. Background technique [0002] Slope flow is the process of converging and moving water on the surface of the slope. Soil midflow is the flow of water flowing along the interface of different water-permeable soil layers in the soil. They are all important components of runoff. , nutrient loss, and calculation of watershed hydrological cycle all play a very important role. [0003] Slope flow and soil flow are important sources of subsurface runoff, rivers, and lakes, and are an important part of the runoff process in the basin. They are very important for the formation of water resources and runoff generation in the entire basin. The generation of soil midflow is affected by factors such as soil properties, vegetation coverage, precipitation characteristics, initial soil moisture content, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N33/18
CPCG01N33/18G01N33/24
Inventor 董国强王振龙许莹莹范月胡勇刘猛周超
Owner 安徽省(水利部淮河水利委员会)水利科学研究院(安徽省水利工程质量检测中心站)
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