Contents
What is the LS factor?
LS Factor. L is the slope length factor, representing the effect of slope length on erosion. It is the ratio of soil loss from the field slope length to that from a 72.6-foot (22.1-meter) length on the same soil type and gradient.
What is the slope gradient factor?
The slope length gradient (LS) factor expresses the effect of topography, i.e., combining effects of slope length (L) and slope steepness (S) on rate of soil erosion.
What is steepness factor?
The slope length and steepness factor (LS-factor) describes the combined effects of slope length (i.e., flow length) and slope gradient (i.e., grade or relief); it represents the ratio of soil loss per unit area on a site to the corresponding loss from a 22.1-m- (72.6-ft-) long experimental plot with a 9% slope.
What is steepness of slope?
The steepness, incline, or grade of a line is measured by the absolute value of the slope. A slope with a greater absolute value indicates a steeper line. The direction of a line is either increasing, decreasing, horizontal or vertical. A line is increasing if it goes up from left to right.
Is the slope the gradient?
The Gradient (also called Slope) of a straight line shows how steep a straight line is.
Why is poor quality soil a problem?
Soil degradation leads directly to water pollution by sediments and attached agricultural chemicals from eroded fields. Soil degradation indirectly causes water pollution by increasing the erosive power of runoff and by reducing the soil’s ability to hold or immobilize nutrients and pesticides.
What are the 4 types of soil erosion?
Rainfall, and the surface runoff which may result from rainfall, produces four main types of soil erosion: splash erosion, sheet erosion, rill erosion, and gully erosion.
What are the 6 RUSLE factors?
R = rainfall-runoff erosivity factor.
How is LS factor used in soil loss equation?
Calculation of slope length (LS) factor as used for the Universal Soil Loss Equation (USLE), based on slope and (specific) catchment area, latter as substitute for slope length. This tool takes only a Digital Elevation Model (DEM) as input and derives catchment areas according to Freeman (1991).
How are slope steepness and LS factors related?
L factor and S factor are usually considered together. LS factors = the slope length factor L computes the effect of slope length on erosion and the slope steepness factor S computes the effect of slope steepness on erosion. Values of both L and S equal 1 for the unit plot conditions of 72.6 ft. length and 9 percent steepness.
Where do I find slope value in Saga?
You can see the slope value in degrees displayed at the bottom of the SAGA window. Aspect. This creates a grid of aspect or facing direction. You can see the slope value in degrees displayed at the bottom of the SAGA window.
How are LS and s factors related to erosion?
L factor and S factor are usually considered together. LS factors = the slope length factor L computes the effect of slope length on erosion and the slope steepness factor S computes the effect of slope steepness on erosion.