engleski

Investigation of Surface and Subsurface Water Runoff on a Hillslope Vineyard Using TDR and Soil- Water Collection Instrument

Surface and subsurface water runoff can be predominant hydrological flux components in sloped arable land. While various methods are used for the quantification of hillslope fluxes, combining methods is necessary in order to perform proper analysis. The aim of the research was to investigate (sub)surface water runoff at the SUPREHILL observatory (during 2021) and to validate the sensor and instrument data. Field equipment included self-constructed soil-water collection instruments for capturing surface and subsurface runoff, installed at soil surface and at 60 cm depth, respectively. The instruments were accompanied by time-domain reflectometry (TDR) sensors installed at 20 and 60 cm depth. For the determination of terrain sloping, aerial imagery acquired with an unmanned aerial vehicle (UAV) was used. The imagery was processed using Agisoft Metashape to generate dense surface from motion (SfM) point clouds. The process resulted with a digital orthophoto map (DOM), digital surface model (DSM), and a virtual 3D model of the vineyard. The first results show that sensor data backs up the results from soil-water collection instruments and also confirms that the combination of methods is crucial for unveiling the runoff processes. Furthermore, the sensor data and soil- water monitoring results suggest that surface and subsurface flow play a relevant part in the hillslope soil-water dynamics.

runoff ; soil-water ; time-domain reflectrometry ; unmanned aerial vehicle ; vadose zone

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