Soil Erosion Network: Model Metadata
AUSGUL -Water Erosion

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1 Model identification Soil Erosion Network - Model
1.1 Model name AUSGUL -Water Erosion
1.2 Most recent version 3.1
1.3 Date of release March 1992
2 Water erosion
3 Contact person
3.1 Name Professor A. Sidorchuk
3.2 Address Laboratory of Soil Erosion and Fluvial Processes,
Geographical Faculty, Moscow State University,
119889 Moscow,
3.3 Tel +7 095 939 5697
3.4 Fax +7 095 932 8836
3.5 Email
4 Model Author(s) Professor A. Sidorchuk
5 Model components
5.1 Water erosion: Based on sediment budget equation
5.2 Wind erosion: No
5.3 Hydrology: Simulated or observed hydrograph
5.4 Site/topography: Initial slope longitudinal profile
5.5 Plant growth: No
5.6 Management: No
5.7 Soil: Multiple layers
5.8 Chemistry: No
5.9 Weather: For used hydrogical model
6 Model characteristics
6.1 Spatial
6.1.1 Class of area: Catchment
6.1.2 Flow routing system: Streamline
6.1.3 Minimum area: Point
6.1.4 Maximum area: No Limit, in practice about 10 - 50
6.2. Temporal
6.2.1 Timestep: Daily and less
6.2.2 Single or multiple event? Multiple
6.2.3 Maximum simulation duration: Until stable gully profile development
7 Model's representation of processes
7.1 Water erosion processes
7.1.1 Interrill: No
7.1.2 Rill: Modelled at the upper part of catchment
7.1.3 Gully: The main model
7.1.4 Streambank: In form of mass movement on the gully sides
7.1.5 Deposition: Modelled with low accuracy, better to exclude
7.2 Wind erosion processes: No
7.3 Hydrological processes: Simulated separately
7.4 Plant processes: No
7.5 Soil: Multiple layer system; properties changes when layer eroded away
7.6 Chemistry: No
7.7 Weather: No
7.8 Other: 1. Stable gully cross-section profile is modelled after each hydrological event

2. The critical velocity of erosion initiation is calculated, mainly for the upper soil layer with vegetation cover and residue.

8 Input Data (* = Mandatory)
8.1 Weather: For used hydrological model
8.2 Soil: Erosivity coefficient (not from ULSE) for each soil layer: water resistant soil aggregates diameter mean soil particles diameter cohesion angle of internal friction density porosity elevations of top surface of soil layer (longitudinal profile) roughness coefficeint (after Manning)
8.3 Hydrology: Row of specific discharge values for the catchment
8.4 Plant cover: No
8.5 Soil surface cover: Density of the grass roots in the upper soil layer
8.6 Management: No
8.7 Topography/site characteristics: Longitudinal profile in elevations along initial streamline; - catchment area change along this line
8.8 Micro-topography: No
8.9 Other 1. Empirical relation between flow width and discharge

2. Empirical relation between stable gully bottom width and discharge

9 Output data Gully longitudinal profile evolution during the simulation period in hydrological event resolution listing of:

-elevations of bottom surface along the gully
-gully depth along the gully
-gully bottom and top width along the gully
-gully volume along the gully

10 Programming language FORTRAN - 90
11 Computer requirements Any with FORTRAN translator
12 Documentation
12.1 Scientific documentation: A. Sidorchuk (1994) Static and dynamic Models for estimation of the dimensions of gullies; In: G. Larinov and M. Nearing ed. Proc of Int. Workshop on Soil Erosion. Perdue University. pp136-156
12.2 User's guide: In FORTRAN listing comments
12.3 Technical documentation: Reports in Russian
13 Availability Upon request from author

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