Assessing soil erosion on a rehabilitated landform using the CAESAR landscape evolution model ©

Abstract. While there are numerical landscape evolution models that simulate how steady-state flows of water and sediment reshape topography over long periods of time, r.sim.terrain is the first to simulate short-term topographic change for both steady-state and dynamic flow regimes across a range of spatial scales. This free and open-source Geographic Information Systems (GIS)-based topographic evolution model uses empirical models for soil erosion and a physics-based model for shallow overland water flow and soil erosion to compute short-term topographic change. This model uses either a steady-state or unsteady representation of overland flow to simulate how overland sediment mass flows reshape topography for a range of hydrologic soil erosion regimes based on topographic, land cover, soil, and rainfall parameters. As demonstrated by a case study for the Patterson Branch subwatershed on the Fort Bragg military installation in North Carolina, r.sim.terrain simulates the development of fine-scale morphological features including ephemeral gullies, rills, and hillslopes. Applications include land management, erosion control, landscape planning, and landscape restoration.

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r.sim.terrain: a dynamic landscape evolution model

10.5194/gmd-2019-18 ◽

2019 ◽

Author(s):

Brendan Alexander Harmon ◽

Helena Mitasova ◽

Anna Petrasova ◽

Vaclav Petras

Keyword(s):

Steady State ◽

Soil Erosion ◽

Landscape Planning ◽

Landscape Evolution ◽

Spatial Scales ◽

Evolution Model ◽

Short Term ◽

Ephemeral Gullies ◽

Open Source Gis ◽

Dynamic Landscape

Abstract. While there are numerical landscape evolution models that simulate how steady state flows of water and sediment reshape topography over long periods of time, r.sim.terrain is the first to simulate short-term topographic change for both steady state and dynamic flow regimes across a range of spatial scales. This free and open source, GIS-based topographic evolution model uses empirical models for soil erosion at watershed to regional scales and a physics-based model for shallow overland water flow and soil erosion at subwatershed scales to compute short-term topographic change. This either steady state or dynamic model simulates how overland sediment mass flows reshape topography for a range of hydrologic soil erosion regimes based on topographic, land cover, soil, and rainfall parameters. As demonstrated by a case study for Patterson Branch subwatershed on the Fort Bragg military installation in North Carolina, r.sim.terrain can realistically simulate the development of fine-scale morphological features including ephemeral gullies, rills, and hillslopes. Applications include land management, erosion control, landscape planning, and landscape restoration.

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GRAINSIZE DEPENDENT TRANSPORT AND DEPOSITION IN A LANDSCAPE EVOLUTION MODEL

10.1130/abs/2019am-338819 ◽

2019 ◽

Author(s):

Erica Emry ◽

◽

Kyungdoe Han ◽

Michael Berry ◽

Jolante van Wijk ◽

...

Keyword(s):

Landscape Evolution ◽

Evolution Model ◽

Dependent Transport

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