Soil Erosion Network: Model Metadata

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1 Model identification Soil Erosion Network - Model
1.1 Model name LISEM - Water erosion
1.2 Most recent version 3.0
1.3 Date of release October 1995
2 Water erosion
3 Contact person
3.1 Name Dr Ad P.J. De Roo.
3.2 Address Department of Physical Geography, Utrecht University, P.O. Box 80115, 3508 TC Utrecht, The Netherlands
3.3 Tel +31 30 253 5773
3.4 Fax +31 30 254 0604
3.5 Email
4 Model Author(s) Dr. Ad P.J. De Roo, Mr. C.G. Wesseling, Dr. V.G. Jetten (INRA, Laon, F). Mr. C.J. Ritsema (Staring Centre, Wageningen).
5 Model components
5.1 Water erosion: Splash detachment: using Aggregate Stability (new). Flow detachment: using soil cohesion (EUROSEM). Transport capacity: using D50 (Govers; EUROSEM).
5.2 Wind erosion: -
5.3 Hydrology: Seven options: (1) no infiltration (2) Richards equation (3) Richards plus wheeltracks (4) Richards plus crust plus wheeltracks (5) Holtan (6) Green/Ampt (7) two layer Green/Ampt; using Manning equation catchment.
5.4 Site/topography: -
5.5 Plant growth: -
5.6 Management: Simulates roughness, wheeltracks, paved roads, effects of field strips and grassed waterways.
5.7 Soil: For Richards: unlimited amount of layers.
5.8 Chemistry: -
5.9 Weather: Breakpoint rainfall data, multiple rain gauges.
6 Model characteristics
6.1 Spatial
6.1.1 Class of area: Catchment
6.1.2 Flow routing system: Kinematic wave on rasters; separate for overland flow and channel network
6.1.3 Minimum area: 0.5 ha.
6.1.4 Maximum area: Roughly estimated at 200 km2: not suitable for catchments containing large rivers (larger than pixel).
6.2. Temporal
6.2.1 Timestep: User defined, from 1 second up to several minutes.
6.2.2 Single or multiple event? Single event.
6.2.3 Maximum simulation duration: A few days.
7 Model's representation of processes
7.1 Water erosion processes
7.1.1 Interrill: Lumped with rill erosion; however, within the pixel flow can be concentrated; using EUROSEM equation.
7.1.2 Rill: When critical shear velocity for rill initiation is exceeded (Rauws & Govers).
7.1.3 Gully: In preparation.
7.1.4 Streambank: When there is transport capacity left over and the channel bed cohesion is sufficiently small.
7.1.5 Deposition: When transport capacity is exceeded (EUROSEM) equation).
7.2 Wind erosion processes:
7.2.1 Creep/surface roll:
7.2.2 Saltation:
7.2.3 Suspension
7.3 Hydrological processes:
7.3.1 Evaporation/transpiration:
7.3.2 Runoff: Kinematic wave and Manning equation.
7.3.3 Infiltration Richards, Holtan or one or two layer Green/Ampt
7.3.4 Subsurface flow: In preparation.
7.3.5 Return flow
7.4 Plant processes:
7.4.1 Light interception and photsynthesis:
7.4.2 Dry matter and residue
7.4.3 Root growth:
7.4.4 Pests:
7.4.5 CO2 sensitivity:
7.5 Soil: Unlimited number of layers (Richards).
7.5.1 Crust development Crust development in preparation, a partly crusted surface can be simulated with Richards.
7.5.2 Aggregate properties Aggregate stability.
7.6 Chemistry:
7.6.1 Nutrients:
7.6.2 Carbon
7.6.3 Pesticides
7.6.4 Other contaminants
7.7 Weather: Breakpoint rainfall from multiple rain gauges.
7.8 Other: LISEM simulates the effects of wheeltracks, roads, field strips, grassed waterways, all smaller than the pixel size. Also the effects of stones and crusts are simulated.
8 Input Data (* = Mandatory)
8.1 Weather: (All spatial inputs are in a PC-based raster Geographical information) breakpoint rainfall data (time, intensity).
8.2 Soil: Aggregate stability, soil cohesion, D50, random roughness, fraction with stones, fraction with crusts, initial moisture content or pressure head, infiltration characteristics depending on infiltration method (saturated hydraulic conductivity and other Richards/Green-Ampt or Holtan parameters).
8.3 Hydrology: Manning's n for overland flow and channels, channel dimensions.
8.4 Plant cover: Leaf area index, fraction of soil cover, crop height.
8.5 Soil surface cover: Percentage cover by vegetation, cover by stones, cover by crusts, cover by roads, cover by wheeltracks.
8.6 Management: Location and width of field strips and waterways.
8.7 Topography/site characteristics: = Slope gradient, aspect (local drain direction).
8.8 Micro-topography: Random roughness.
9 Output data Total rainfall, total discharge, peak discharge, time of peak discharge, runoff percentage of rainfall, total soil loss, average soil loss, total infiltration, total splash detachment, total flow detachment, total deposition; ASCII files to construct storm hydrograph and sediment concentration graph; Maps of erosion and deposition. Maps over overland flow at a number of predefined times during the event.
10 Programming language C + +, Utrecht modelling language (Dynamite).
11 Computer requirements Minimum 386+math coprocessor + 4Mb ROM. For larger catchments a Pentium is recommended.
12 Documentation
12.1 Scientific documentation: De Roo, A.P.J., Wesseling, C.G., Cremers, N.H.D.T., Offermans, R.J.E., Ritsema, C.J. and van Oostindie, K. (1994) LISEM: a new physically-based hydrological and soil erosion model in a GIS-environment: Theory and implementation. IAHS Publication No. 224 (Proceedings of the Canberra Conference), 439-448.

De Roo, A.P.J. and Offermans, R.J.E. (1995). LISEM: A Physically-based hydrologic and soil erosion model for basin scale water and sediment management: sensitivity analysis, calibration and validation. IAHS Publication No. 231 (Proceedings of a Boulder symposium), 399-407.

De Roo, A.P.J., Wesseling, C.G. and Ritsema, C.J. (1995). LISEM: a single event physically-based hydrologic and soil erosion model for drainage basins. I: Theory, input and output. Hydrological Processes (in press).

De Roo, A.P.J., Offermans, R.J.E. and Cremers, N.H.D.T. (1995). LISEM: a single event physically- based hydrologic and soil erosion model for drainage basins. II: Sensitivity analysis, validation and application. Hydrological Processes (in press).

12.2 User's guide: User manual (Dutch and English version).
12.3 Technical documentation: User manual (Dutch and English version).
13 Availability On request from author. Both LISEM and the PC-based GIS are distributed.
14 Other Relevant Information There are plans to include nutrient transport, subsurface flow, gully erosion and evapotranspiration to make a continuous model version. Also the dynamics of soil roughness and crusts are studied.

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