A mechanic–electronic sensor for automatic measurement of sediment-laden flow rate from erosion runoff plots

Qu, Liqin; Jing, Zhao; Zhao, Xiuhai; Yan, Lijuan; Zhou, Jian; Lei, Tingwu

doi:10.1016/j.jhydrol.2007.05.012

Cited by 2 publications

(1 citation statement)

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“…Specifically, in Dunkerley (2003) spot measurements of surface flow rates are computed through an optical device exploiting reflectivity of floating objects. In Qu et al (2007), a sensor for sediment-laden flow rate is developed to estimate sediment concentration in runoff. Such promising devices provide local information on overland flows, yet their implementation is restricted to small scale and supervised experimental plots due to their limited resilience.…”

Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%

Fluorescent particle tracers in surface hydrology: a proof of concept in a semi-natural hillslope

Tauro

Grimaldi

Petroselli

et al. 2012

Hydrol. Earth Syst. Sci.

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Abstract. In this paper, a proof of concept experiment is conducted to assess the feasibility of tracing overland flow on an experimental hillslope plot via a novel fluorescent particle tracer. Experiments are performed by using beads of diameters ranging from 75 to 1180 µm. Particles are sensed through an experimental apparatus comprising a light source and a video acquisition unit. Runoff on the experimental plot is artificially simulated by using a custom-built rainfall system. Particle transits are detected through supervised methodologies requiring the presence of operators and unsupervised procedures based on image analysis techniques. Average flow velocity estimations are executed based on travel time measurements of the particles as they are dragged by the overland flow on the hillslope. Velocities are compared to flow measurements obtained using rhodamine dye. Experimental findings demonstrate the potential of the methodology for understanding overland flow dynamics in complex natural settings. In addition, insights on the optimization of particle size are presented based on the visibility of the beads and their accuracy in flow tracing.

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Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%