Drainage basin non-point source pollutant transport simulation test device and drainage basin non-point source pollutant transport simulation test method

Abstract

The invention discloses a drainage basin non-point source pollutant transport simulation test device and method, an inlet of a spraying device is provided with an electromagnetic flowmeter, a pressure sensor is arranged below a sand box, a water outlet is connected with a tipping-bucket rain gauge through a pipeline, a conductivity probe is arranged on the pipeline, and a water level recorder is arranged in the sand box; a tensiometer and a soil humidity sensor are also arranged in the sand box; during testing, rainfall is simulated through a pulse method, precipitation, underground water storage variable, discharge flow, tracer discharge concentration, underground water level and soil moisture content are monitored through a sensor, a change curve of the monitoring variables along with time is generated, and the correlation between the tracer discharge concentration and other monitoring variables is researched based on the change curve; and the underground transportation duration of the tracer agent is calculated through a transient transportation duration distribution theory. According to the method, the influence mechanism of the discharge concentration and the transport duration of the non-point source pollutants can be revealed, the transport duration of the tracer from rainfall to discharge is calculated, and guidance is provided for non-point source pollution prevention and control.

Description

technical field [0001] The invention belongs to the field of water pollutant transport research, and in particular relates to a simulation test device and method for the transport of non-point source pollutants in a river basin. Background technique [0002] The eutrophication of surface water and groundwater caused by excessive discharge of reactive nitrogen has become a major environmental problem. How to describe the transport mechanism of non-point source pollutants in the basin is currently a difficult problem. Domestic research on the transport process of non-point source pollutants in river basins is still immature, mainly because the influence mechanism of pollutant discharge concentration and transport duration is unclear. Among the existing test devices for the transport process of non-point source pollutants in the basin, CN102520131A discloses a groundwater pollution simulator based on a multi-layer aquifer groundwater flow system, although it can observe the tra...

AI Technical Summary

Problems solved by technology

Domestic research on the transport process of non-point source pollutants in river basins is still immature, mainly because the impact mechanism of pollutant excretion concentration and transport time is unclear

Among the existing test devices for the transport process of non-point source pollutants in watersheds, CN102520131A discloses a groundwater pollution simulator based on a multi-layer aquifer groundwater flow system, although it can observe the migration of tracers in the aquifer status, but the lack of real-time monitoring of the tracer excretion concentration and the infusion time of the tracer cannot be obtained

Images