System and method for measuring nitrogen and phosphorus migration flux of interflow

Abstract

The invention discloses a system and a method for measuring a nitrogen and phosphorus migration flux of interflow. The method comprises the steps of measuring a unit-area runoff depth value and nitrogen and phosphorus concentration data of the collected interflow; normalizing the measured unit-area runoff depth value, and converting the unit-area runoff depth value into an interflow migration flux; and calculating the nitrogen and phosphorus migration flux of the interflow according to a set calculation condition parameter initial value and the unit-area runoff depth value as well as the nitrogen and phosphorus concentration data of the collected interflow, and performing cyclic calculation processing. According to the system and the method, the problems that the automatic measurement functionality of a conventional method is low, the flow of the interflow cannot be continuously measured, any slope cannot be continuously observed and the like are fundamentally solved; a measurement result can be quickly and accurately obtained in real time; the system and the method are suitable for indoor measurement and outdoor measurement, cannot be limited by terrains and have high popularization and application values.

Description

Technical field [0001] The invention relates to a system and method for collecting, extracting and measuring nitrogen and phosphorus samples in soil and soil in the treatment of agricultural non-point source pollution. Background technique [0002] Purple soil is one of the important farming soils in southern my country. It is widely distributed in 15 provinces (regions) south of the Yangtze River, including Sichuan and Chongqing, with a total area of ​​about 200,000 km. 2 . Due to the rapid physical weathering of the purple mother rock and the weak corrosion resistance, the abundant and relatively concentrated rainfall in this area, the high intensity of human activities and the high multiple cropping index have led to extremely serious soil erosion on the slope farmland. In recent years, in order to unilaterally pursue high crop yields, the region has invested a lot of phosphate fertilizers, high-intensity soil erosion and inefficient use of nitrogen and phosphorus fertilizers ...

AI Technical Summary

Problems solved by technology

In the actual application process, problems such as leakage of masonry materials and deformation of iron sheet materials will have a certain impact on measurement accuracy

Moreover, this method cannot obtain the process data along the soil flow during the rainfall process; if it is necessary to monitor the soil flow with different slope lengths and soil depths, multiple observation plots must be built, resulting in an increase in construction costs

In addition, during the construction of the observation area, the soil above the parent rock layer needs to be removed and refilled, which will destroy the original structure of the soil, and is time-consuming and labor-intensive.

Due to the randomness of rainfall intensity and rainfall duration, it is impossible to design the capacity of the sump to take into account all rainfall conditions, so the designed sump often overflows under heavy rain, resulting in missing observational data

[0004] Therefore, it is necessary to improve the existing soil soil flow monitoring method to overcome the problems that the existing methods have less automatic measurement functions, cannot realize continuous measurement of soil flow and continuous observation along any slope, and has the advantages of convenient transportation and movement, saving manpower and The advantages of continuously obtaining flow dynamic data in the soil are suitable for both indoor testing and field testing, and are not restricted by terrain

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