Short-term effects on rill erosion and flow resistance for a wood-biochar amended soil

Description

In these measurements, the short-term effects of wood-biochar addition to soil on rill erosion and flow resistance were evaluated. Plot, experiments were carried out discharging a constant clear inflow into a rill incised in the original soil (rill0) and two rills, named rill3 and rill5, incised in a soil amended with different initial biochar concentrations BC (3% and 5% by weight). For each investigated rill, the outflow discharge of the entire run was collected by a storage tank, and the run was stopped when a 55 L volume was reached. The collected volumes were used to measure the corresponding weights of the eroded mixture (sediments and biochar), biochar, and sediments. The Terrestrial photogrammetry 3D photo reconstruction was used to obtain the Digital Elevation Models (DEM) before and after the experimental runs, and by the corresponding DEM of difference, the total volume of the eroded mixture (sediment and biochar) was calculated. For the three investigated rills and a single experimental discharge, the measurements of water depth, hydraulic radius, and flow velocity were used to calculate the Darcy-Weisbach friction factor values.

Institutions

• Universita degli Studi di Palermo

  Sicilia, Palermo

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