Dry farmland surface runoff collecting device

Abstract

The invention provides a dry farmland surface runoff collecting device. The upper end of a triangular weir is open and is covered by a covering plate; a water inlet and a water outlet are formed in the two ends of the triangular weir in the horizontal direction respectively; a flow monitoring device used for monitoring flow is arranged at the water outlet; the water outlet is smaller than the water inlet; the height of the water outlet is the same as the height of the water inlet; the water outlet communicates with a collecting bottle with an upward opening through an adapter; an overflow opening is formed in the bottle wall at the upper end of the collecting bottle; and the overflow opening is lower than the water outlet. The invention provides a simple runoff liquid collecting device which can accurately measure and calculate the volume of soil runoff liquid, so that the monitoring of the soil runoff liquid has the characteristics of low cost, convenient manufacturing and installing,easy implementing, reliable result and the like. The device can scientifically and effectively collect farmland surface runoff, facilitate subsequent monitoring and prevent nutrient loss caused by the farmland surface runoff, and is beneficial to the research on the surface runoff loss of farmland surface source pollutants.

Description

technical field [0001] The invention relates to environmental monitoring technology, in particular to a dry field surface runoff collection device. Background technique [0002] Soil and water loss in farmland, agricultural non-point source pollution and nutrient loss in farmland are serious problems facing my country's agricultural production and agricultural ecological environment protection. The farmland surface runoff is the main carrier affecting the loss of pollutants and nutrients. Therefore, the research and monitoring of farmland runoff has always been an important research content in the field of agricultural environmental protection. The runoff collector is an essential device in farmland research. [0003] In my country, the research on the loss of agricultural compounds including nitrogen with surface runoff started relatively late, especially in various watersheds and regions, there have been few studies on the long-term continuous in-situ monitoring of surfa...

AI Technical Summary

Problems solved by technology

[0003] In my country, the research on the loss of agricultural compounds including nitrogen with surface runoff started relatively late, especially in various watersheds and regions, there are few studies on the law of pollutant loss in surface runoff through long-term continuous in-situ monitoring for many years

Traditional methods mostly focus on studying the migration and transformation of non-point source pollutants through microscopic model tests or field runoff test plots. Surface runoff collection requires a runoff collection pool, which increases the construction area and destroys the original soil environment. and time consuming

In addition, rainfall is uncertain, and the duration and intensity of rainfall will affect the sediment content and pollutant concentration in surface runoff. Traditional methods are likely to cause sediment to block the mouth of the collection pool, or the collected runoff is not representative for monitoring

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