A wind tunnel study under wind-driven rains was conducted at Ghent University, Belgium, to determine the combined effect of rain and wind on the rainsplash transport process. Transport rates were measured by trapping the splashed particles at set
distances in the upslope and downslope directions, respectively, for windward and leeward slopes. Rainsplash transport under wind-driven rains was adequately described by relating the transport rate to the rain impact pressure and wind shear velocity by log
Similarities and dissimilarities between the dynamics of sand and dust during wind erosion of loamy sandy soil
Aeolian features ; Aeolian transport ; Agropedology ; Cultivated land ; Dust ; Germany ; Niedersachsen ; Sand ; Sandy soil ; Soil erosion ; Wind erosion
The AA. examine the aeolian dynamics of sand and dust during a wind erosion event on loamy sandy soil in Northern Germany. The large percentage of dust (up to 32%) in the topsoil and the high frequency of wind erosion events make the region suitable
for studying the behaviour of both components simultaneously. The aim is to check whether differences exist in the patterns of erosion, transportation, deposition and accumulation (deposition minus erosion) during a single wind erosion event.
Aeolian features ; Aeolian transport ; Arid area ; Desert ; Model ; Namibia ; Topography ; Valley ; Wind ; Wind speed
This paper investigates the impacts of dryland valley topography on wind speed and direction in order to understand better the effects of a valley on aeolian sediment dynamics. Anemometers and wind vanes were used to measure airflow characteristics
This study deals with local airflow patterns induced by 12-16 m high, partly vegetated dunes, under various prevailing wind conditions. Detailed empirical data were derived by means of an unconventional use of directional raingauges. Results
are presented on the nature, extent and intensity of locally modified patterns of surface flow and on their dependence on wind conditions and slope inclination. Results may serve to verify or refine existing perceptions or models of the flow affecting sand
Aeolian features ; Arid area ; Biogenic process ; Duricrust ; Impact ; Sediment transport ; Simulation ; Wind erosion
Wind-tunnel simulations of the response of 2 moss crusts to grain impact indicate that, given sufficient time, these surfaces will deteriorate under very low wind velocities. This study attempts to isolate the 2 effects, the impact force
A mathematical model for evaluating the effect of wind on downward-spraying rainfall simulators
Hydrodynamics ; Mathematical model ; Model ; Rainfall simulation ; Soil erosion ; Splash ; Water erosion ; Wind
The AA. study the effect of wind on downward-spraying rainfall simulators and present a model that should help in the selection of single or multiple (by addition) full-cone spray nozzles in order to avoid laborious fieldwork characterizing
Aeolian dust ; Agropedology ; Coastal plain ; North Carolina ; Soil erosion ; Soil moisture ; Soil properties ; Spatial variation ; Topography ; United States of America ; Wind ; Wind erosion
A preliminary study of eolian erosion from an agricultural field was undertaken during the late winter of 2002 and early spring of 1999. Results indicate that wind erosion is a significant process on agricultural fields of the North Carolina Coastal
The AA. report detailed results with respect to the aerodynamic roughness of different gravel surfaces from wind tunnel experiments. With the philosophy that aerodynamic roughness of gravel surfaces is a function of gravel size, spacing and the near
-surface airflow characteristics, the specific purposes are to define the change of aerodynamic roughness length with wind speed, gravel size and coverage and roughness Reynolds number; and establish prediction models for aerodynamic roughness length
Aeolian features ; Aeolian transport ; Experimentation ; Impact ; Model ; Research technique ; Wind speed
(PDA) that employs phase Doppler technique in a wind tunnel. The primary objectives are to define the probability distribution of the speed and angle of impacting and entrained particles, and establish the relationship between impact and entrainment
Results are presented from wind-tunnel experiments that were designed to address the simultaneous spatial and temporal development of the saltation system, with and without artificial sand feed. The development of the saltation system was monitored
over a streamwise length of 8 m during a period of 3600 s. Mass flux data were measured simultaneously at 1 m intervals by the downwind deployment of seven Aarhus sand traps. Wind velocity data were collected throughout the experiments. Through time
Arctic Region ; Canada ; Geographical information system ; Geomorphometry ; Lake ; Northwest Territories ; Periglacial features ; Permafrost ; Statistics ; Tundra ; Wind
statistics supports the efficacy of cross wind-induced effects in orienting the lakes. The similar orientation of existing lakes and former basins suggests that these processes have been effective for at least several centuries.
Aeolian features ; Arid area ; China ; Desert ; Dune ; Earth surface processes ; Sand ; Typology ; Wind ; Xinjiang
) and drift direction suggest that the northeast Taklimakan is an area of low wind energy and the resultant drift direction (RDD) coincides well with the distribution, morphology and scales of the dunes.