# How do you calculate wind erosion?

## How do you calculate wind erosion?

(a) The equation for predicting soil loss due to wind in the Wind Erosion Equation (WEQ) is E = f(IKCLV). (For further information on WEQ see the paper by N.P. Woodruff and F.H. Siddaway, 1965.

## What is the formula for erosion?

The equation is A = R x K x L x S x C x P and multiplies various factors to arrive at the annual erosion rate. The R factor is based on rainfall and runoff, while K is the soil erodibility factor and depends on the type of soil.

What are the factors in wind erosion equation?

The Revised Wind Erosion Equation (RWEQ) makes annual or period estimates of wind erosion based on a single event wind erosion model that includes factors for wind and rainfall, soil roughness, the erodible fraction of soil, crusting, and surface residues (see also Figure W25).

### How do you use the USLE equation?

The USLE is an empirically based equation, derived from a large mass of field data, especially erosion plots and rainfall simulator experiments, and computes sheet and rill erosion as follows: A=RKLSCP where A is computed soil loss, R is the rainfall-runoff erosivity factor, K is a soil erodibility factor, L is the …

### What is wind erosion?

Wind erosion is a natural process that moves soil from one location to another by wind power. It can cause significant economic and environmental damage.

What is unsheltered distance?

Unsheltered Distance The lack of windbreaks allows the wind to put soil particles into motion over greater distances thus increasing the abrasion and soil erosion. There is no obstacle to reduce wind velocity.

#### How do you calculate erosion index?

The erosion index (EI, also called the erodibility index) is created by dividing potential erosion (from all sources except gully erosion) by the T value, which is the rate of soil erosion above which long term productivity may be adversely affected.

#### How do you calculate gully erosion?

Gully erosion is not calculated by the RUSLE. The soil loss from concentrated flow, gullies, and other similar types of erosion can be determined by calculating the volume of soil removed from the eroded area. The tons of soil loss can then be determined by multiplying the volume removed by the unit weight of soil.

What is the meaning of Erodibility?

Erodibility. The susceptibility of the ground surface to erosion. In an aeolian context, this refers to susceptibility to wind erosion. For bare, dry, surfaces, this is determined by the particle size of surface sediments.

## How do you calculate R factor for USLE?

R factor of each rainfall event is calculated as the product of total storm energy(E) and maximum 30 min intensity (I30) of that rainfall event. R factor of each rainfall events are summed up and divided by number of years to get average annual R factor values.

## How is USLE LS factor calculated?

The equations for calculating LS in the RUSLE are:(1) LS = L ⋅ S (2) L = λ / 22.13 m (3) m = β / 1 + β (4) β = sin θ / 3 ⋅ sin θ 0.8 + 0.56 (5) S = 10.8 ⋅ sin θ + 0.03 θ < 9 % S = 16.8 ⋅ sin θ − 0.5 θ ≥ 9 % where λ is the slope length (m), m is a variable length-slope exponent, β is a factor that varies with slope …

What is wind erosion and what causes it?

What causes wind erosion? Wind erosion can occur only when windspeed at the soil surface is sufficient to lift and transport soil particles. Sand moving across the soil surface wears away soil aggregates and thin crusts, causing more soil particles to become detached and to be blown away.

### How is the revised Universal soil loss equation used?

Erosion Prediction – Revised Universal Soil Loss Equation (RUSLE) The Revised Universal Soil Loss Equation (RUSLE) is an easily and widely used computer program that estimates rates of soil erosion caused by rainfall and associated overland flow. RUSLE is used by numerous government agencies and private organizations and individuals to assess…

### Which is the best program for erosion prediction?

SECTION 1 – GENERAL RESOURCE REFERENCES 4. Erosion Prediction – Revised Universal Soil Loss Equation (RUSLE) The Revised Universal Soil Loss Equation (RUSLE) is an easily and widely used computer program that estimates rates of soil erosion caused by rainfall and associated overland flow.

How does the RUSLE index affect soil erosion?

RUSLE is an index method having factors that represent how climate, soil, topography, and land use affect rill and interrill soil erosion caused by raindrop impact and surface runoff.

#### When does erosion occur on the lower portion of the slope?

In some cases, the slope can flatten to cause deposition and then steepen so that erosion occurs on the lower portion of the slope. Slope length passes through the depositional area when soil loss is being estimated on the lower portion of this slope.

30/10/2019