Impact of slope gradient on soil surface features and infiltration on steep slopes in northern Laos

Investigation of Effective Factors on Runoff Generation and Sediment Yield of Loess Deposits Using Rainfall Simulator

“…Table 8 shows Pearson Correlation Coefficient between different measured variables with runoff volume, sediment production and sediment concentration. With statistical investigation, it was found that slope with %80 and %88 correlation coefficients, has the highest direct relationship with the amount of produced sediment and runoff, respectively, these results are similar to a part of Ribolzi et al (2010) results. After that is the amount of silt with %53 correlation coefficient with sediment production and %54 correlation coefficient with runoff production.…”

“…, 2010 studied the effect of grazing on physical characteristics and soil erodibility, in the area and found that intense grazing and trampling decrease permeability, retainment of water in the soil and stability of aggregates and therefore, increase runoff and sediment production. - Ribolzi et al (2010) investigated the effect of slope on the amount of changes in landscape of the soil surface and sediment production using field rainfall simulator with 1 m 2 plot and Laser scanning technology and concluded that the changes in landscape are more considerable in steeper slopes. Also in steeper slopes with other conditions being constant, runoff and sediment productions are higher.…”

Sources and export of particle-borne organic matter during a monsoon flood in a catchment of northern Laos

“…Elevation across the Houay Xon catchment ranges between 272 and 1300 m a.s.l. Steep hillslopes (2-57 • ) are cultivated and are therefore very sensitive to soil erosion (Chaplot et al, 2005;Ribolzi et al, 2011). Due to the decline of soil productivity triggered by soil erosion over the years (Patin et al, 2012) and to an increasing labour need to control weed invasion (Dupin et al, 2009), farmers progressively replaced rice fields with teak plantations in the catchment (Fig.…”

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“…In case of soil erodibility, the soil hydraulic conductivity has a determining importance . Infiltration process is affected by rainfall intensity, soil surface state (crusted, freshly tilled), antecedent soil moisture content, surface roughness, slope steepness, as reported from studies under simulated rainfall conditions (Janeau et al, 2003;Rodrigo Comino et al, 2016;Van den Putte et al, 2013;Ribolzi et al, 2011;Truman et al, 2011;Rimal and Lal, 2009;Kato et al 2008).…”