نتایج جستجو برای: rill
تعداد نتایج: 252 فیلتر نتایج به سال:
Flow velocity is one of the most important hydrodynamic variables for both channelized (rill and gullies) interrill erosive phenomena. The dye tracer technique to measure surface flow Vs based on measurement travel time a needed cover known distance. measured must be corrected obtain mean V using factor αv = V/Vs which generally empirically deduced. can influenced by method applied dye-tracer v...
In this paper, for the first time, effect of longitudinal profile shape rill (uniform, concave, and convex) on flow resistance law was studied. The part paper is based a theoretical equation to estimate Darcy–Weisbach friction factor f, deduced from power velocity distribution measurements performed plot. At first, Γ parameter calibrated using all available measurements. Then an analysis hydrau...
Soil erosion results from an interaction of several parameters, which vary in space and time. Awareness ofenvironmental changes and their impact on the intensity and spatial pattern of water erosion can effectively help inrecognition of erosional reactions versus the affecting factors. The aim of this paper is to describe the development ofa methodology based on present knowledge and available ...
Soil erosion by water is a main form of land degradation worldwide. The problem has been addressed, among others, in the United Nations Sustainability Goals. However, for mitigation consequences and adequate management affected areas, reliable information on magnitude spatial patterns needed. Although such need often addressed modelling, precise monitoring necessary calibration validation model...
cients. Normalizing to a unit plot of length 22.13 m, both the USLE and RUSLE use the equation Empirical soil erosion models continue to play an important role in soil conservation planning and environmental evaluations around L 5 (l/22.13) [2] the world. The effect of hillslope length on soil loss, often termed the where L is soil loss normalized to the 22.13-m-long slope length factor, is one...
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