Simulation test device and test method for grassed swales

Abstract

The invention discloses a simulation test device and a test method for grassed swales. The device comprises a runoff generating device, a runoff flowing device, a runoff collecting device and a monitoring device, wherein the runoff flowing device comprises a V-shaped slot and an angle adjusting structure for adjusting included angles between the longitudinal slope of the V-shaped slot and the twoside faces of the V-shaped slot; the two side faces of the V-shaped slot are provided with a plurality of sampling holes; the bottom of the V-shaped slot is provided with a supporting structure; the V-shaped slot is filled with soil; and the surface of the soil is provided with a surface treatment layer. Testing water with different contaminant concentrations is prepared and different hydraulic loads and flow rates are set according to the purposes of the tests; and the influence of different earth surface measures on the utilization efficiency of the grassed swales and the runoff contaminantregulation can be known from the observation of soil moisture and the monitoring of surface water quality and contaminant concentration of soil solution. Thus the device and the method have great significance for water conservation and municipal rainfall runoff contamination.

Description

technical field

[0001] The invention relates to an ecological control system for urban rainfall surface runoff pollution, in particular to a simulation test device and test method for planting grass ditch. Background technique

[0002] Urban precipitation runoff pollution refers to the fact that rainwater and its runoff flow through the urban ground (such as commercial areas, residential areas, parking lots, etc.) during the precipitation process, and a series of pollutants (such as organic matter, nitrogen, phosphorus, heavy metals, etc.) Non-point source pollution of water bodies caused by direct discharge of drainage systems into water bodies. Urban rainfall surface runoff pollution has become a key factor in urban water environment pollution and ecological degradation on a global scale, and it is the third largest pollution source of rivers and lakes. At the same time, the shortage of water resources has become a worldwide problem, and countries all over the world are a...

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