What do you call the mathematical model developed in 1965 which was used to described soil erosion on plants?
What do you call the mathematical model developed in 1965 which was used to described soil erosion on plants?
contained analyses on how management alternatives would affect erosion. In particular, the Universal Soil Loss Equation (USLE), which has been used successfully on cropland since the early 60’s was adapted to estimate erosion on rangeland.
What is USLE model?
The Universal Soil Loss Equation (USLE) is a widely used mathematical model that describes soil erosion processes. The USLE or one of its derivatives are main models used by United States government agencies to measure water erosion.
What are the application of Universal Soil Loss Equation?
The USLE can be used to compare soil losses from a particular field with a specific crop and management system to “tolerable soil loss” rates. Alternative management and crop systems may also be evaluated to determine the adequacy of conservation measures in farm planning.
What is soil erodibility?
Soil erodibility ( K ) is the intrinsic susceptibility of a soil to erosion by runoff and raindrop impact. In general, the following affect K. See adjacent table. Increasing amounts of soil organic matter result in decreasing values of K.
What is the first most widely known model based data that will detect the soil loss?
The most widely used empirical erosion model is represented by the Universal Soil Loss Equation (USLE) and its derivatives RUSLE and RUSLE 2 (Renard et al., 1997; Terranova et al., 2009; and reference therein).
Who developed the Universal Soil Loss Equation?
The USLE was developed by W. H. Wischmeier, D. D. Smith, and others with the U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS), Soil Conservation Service (SCS), and Purdue University in the late 1950s.
What are the limitations of USLE?
We investigate some of the limitations of existing (R)USLE formulations, such as uncertainty issues given the simple empirical nature of the model and many of its sub-components; uncertainty issues around data availability; and its inability to account for soil loss from gully erosion, mass wasting events, or …
What is the equation of USLE and its purpose?
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 are the limitations of Universal Soil Loss Equation?
This section presents a few of the key limitations of the (R)USLE: regional applicability, uncertainties associated with the model, input data and validation, and representing other types of erosion.
Why is the Universal Soil Loss Equation important?
The Universal Soil Loss Equation (USLE) is hailed as one of the most significant developments in soil and water conservation in the 20 thcentury. It is an empirical technology that has been applied around the world to estimate soil erosion by raindrop impact and surface runoff.
What is the difference between rill and gully?
Rill erosion is caused by slow movement of water along small channels on bare land with less vegetative cover. Gully erosion creates a deep channels that the surface runoff is further enhanced. The water movement is faster, creating a deeper channels.
What is erodibility and Erosivity?
Conceptually, rainfall erosivity is the capacity of rain to produce erosion, whereas soil erodibility is the susceptibility of the soil to be eroded. Particles travel across the soil surface at virtual velocities that vary from the velocity of the flow to near zero.
