A simple expression for wind erosion threshold friction velocity
نویسندگان
چکیده
منابع مشابه
A simple method to estimate threshold friction velocity of wind erosion in the field
[1] This study provides a fast and easy‐to‐apply method to estimate threshold friction velocity (TFV) of wind erosion in the field. Wind tunnel experiments and a variety of ground measurements including air gun, pocket penetrometer, torvane, and roughness chain were conducted in Moab, Utah and cross‐validated in the Mojave Desert, California. Patterns between TFV and ground measurements were ex...
متن کاملInvestigating wind erosion threshold velocity and the effect of soil characteristics in dust production centers in Alborz province
Dust phenomenon is one of the most common and destructive phenomena in the dry and desert regions of the world and Iran, which can have harmful effects on human life and the environment. Wind erosion and the removal and transport of soil particles by wind create dust. Controlling wind erosion will be effective when enough information is available on the factors affecting it. The results of the...
متن کاملParametrization of the increase of the aeolian erosion threshold wind friction velocity due to soil moisture for arid and semi-arid areas
Large-scale simulation of the soil-derived dust emission in semi-arid regions needs to account for the in ̄uence of the soil moisture on the wind erosion threshold. Soil water retention consists of molecular adsorption on the soil grain surface and capillary forces between the grain. Interparticle capillary forces (characterized by the moisture tension) are the main factor responsible for the in...
متن کاملارزیابی عوامل مؤثر بر تثبیت خاک‌های ریزدانه در برابر باد به‌منظور جلوگیری از پیدایش ریزگردها
A laboratory research program was arranged to study the effect of different factors influencing the stability of fine soils against wind action. For this purpose, a laboratory wind tunnel was stabilized and several soil samples were examined by putting the sample trays inside the wind tunnel for different rates of wind velocities. The tray for soil samples was 20´30 cm2 with the depth of 5 cm, ...
متن کاملA Simple Geometrical Model for Solid Friction
We present a simple model for the friction of two solid bodies moving against each other. In a self consistent way we can obtain the dependence of the macroscopic friction force as a function of the driving velocity, the normal force and the ruggedness of the surfaces in contact. Our results are discussed in the context of friction laws used in earthquake models. PACS numbers: 46.30.Pa 81.40.Pa...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Atmospheres
سال: 2000
ISSN: 0148-0227
DOI: 10.1029/2000jd900304