Farmland or sloping field runoff water flow monitoring device

Abstract

The invention discloses a farmland or sloping field runoff water flow monitoring device which comprises a runoff water collector for collecting farmland or sloping field runoff water, a siphon used for siphoning the runoff water from a siphon water inlet valve to a siphon generator through a siphon water outlet valve, a siphon water inlet valve for controlling flow direction of the runoff water in the runoff water collector under the control of a water inlet valve floater, a water inlet valve floater arranged below the siphon water inlet valve, a connecting rod connecting the siphon water inlet valve with the water inlet valve floater, a siphon exhaust valve being used for injecting water in the siphon and exhausting air in the siphon and being closed when the siphon is filled with water, a siphon water outlet valve used for guiding the water in the siphon to the siphon generator, a pressure sensor used for sensing a liquid level pressure parameter in the runoff water collector and storing the liquid level pressure parameter, and the siphon generator being provided with an overflow hole and having a liquid level height of less than that in the runoff water collector. By applying the invention, runoff monitoring instantaneity and runoff measurement precision can be improved.

Description

technical field [0001] The invention relates to agricultural irrigation monitoring technology, in particular to a monitoring device for farmland or sloping runoff water flow. Background technique [0002] Soil erosion, non-point source pollution, nutrient loss in agricultural and forestry land, and the migration of pollutants and nutrients in the soil are serious problems facing my country's ecology, environment, and agriculture and forestry. Among them, runoff is the initiator and main carrier of these problems. Therefore, the study and monitoring of runoff is of great significance. [0003] At present, the research and monitoring of runoff mainly focus on the precise measurement of runoff, which can be divided into continuous runoff measurement and intermittent runoff measurement. The present invention is illustrated for intermittent runoff measurement, that is to study farmland runoff, slope runoff, soil seepage flow and other non-pressure, low water head, small flow, int...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned sump method has obvious defects. For example, it can only measure the total amount or average runoff of runoff, and cannot obtain the dynamic process of runoff. For example, it cannot obtain the real-time relationship curve between runoff and time. As a result, the real-time performance of the obtained runoff-related parameters is poor; furthermore, when the runoff is large, the sump is prone to overflow, which affects the measurement accuracy of runoff

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