Landform & Erosion
Assess and measure landform geometry including batters, berms, crest bunds and erosion gullies and identify areas not constructed to design requiring remedial work
Designing long-term, stable wasterock landforms (WRL) that resist erosional landforms and degradation is closely linked to their structural geometry, such as slope angle, height and length. Geometric assessments of a WRL may allow for early identification of areas not constructed to design, and for preemptive implementation of remedial work. Decipher Geometry is a remote sensing approach for the measurement of WRL geometry. You can easily identify and measure landform geometry such as batters, berms, crest bunds as well as erosion gullies. In conjunction with other Decipher modules, you can also assess how the landform is affecting its surrounding environment. Geometric assessments and monitoring of WRL in Decipher allows for early identification of areas not constructed to design, and for preemptive implementation of remedial work. It also assists in the process of assessing that final structure is safe and stable which is fundamental to meeting closure criteria and outcomes.
WRL can be vulnerable to erosion due to weather and rainfall action. The erosion can result to form gullies, in particular on the slopes of the batter. If uncontrolled and not monitored regularly, gully formation can lead to unstable WRL and cause compliance issues
The angled deviation of the ripping against the contours of a WRL. It is an indicator of the stability of a WRL section (for example, Batter).
Erosion Gully Depth
Vertical distance between the surface and the floor of the gully
Erosion Gully Width
Horizontal distance between the two edge of the opening of the gully
Erosion Gully Spacing
Horizontal distance of gully features which indicate the local clustering of gullies
Erosion Gully/Rill Cover
The horizontal coverage of erosion gullies
Batter Ripping Deviation
Angled deviation of the ripping against the contours
A bund is made up of four walls and typically used as a safety measure to contain hazardous material/liquids or act as a barricading structure for landform features including mining pits/voids. Bunds restrict downward flow on the batter to reduce erosion and spreading of hazardous materials.
A batter is the sidewall of waste rock landform (WRL) or stock pile. Usually 2 or 3 Batters are constructed per WRL in a staircase manner as the WRL is formed upwards.
Horizontal ledge that enforces stability of a slope within the landform. Constructed as angled (5o in ward) floor between two batters.
Crest or abandonment Bund Height
Distance between the top of a crest bund and edge of the berm
Crest or abandonment Bund Width
Horizontal distance across the crest bund
Batter Slope Angle
The slope angle that is formed between the horizontal plane and batter wall
Batter Slope Length
The absolute angled length of the slope between the top and bottom of a batter
Vertical distance between top and bottom of the batter
Berm Slope Angle
The slope angle that is formed between the horizontal plane and the berm floor
The horizontal distance between the base of the adjacent batter and the edge of the berm
How Landform works
Data is first captured and collected from various sources including drone/UAV, satellite, ground based radar or LiDAR.
Captured data is processed to create Digital Elevation Model (DEM) of the landform and is imported into the Decipher platform
Visualise DEM in 3D and mark up areas of interest including batter, berm and bunds and the slope direction
Based on user input, Decipher will process the marked up file and run our landform algorithms over the dataset
Geometry Metric Outputs
Batter height, length, angle, Berm width & angle and Bund height & width are populated
Erosion Metrics Outputs
Erosion gully details identified including gully cover, depth, width, spacing and batter ripping deviation. The erosion metrics will populate area, volume, mean and maximum depth and average length and width of gullies as shapefiles.
The user can view these metrics on the screen in 3D and 2D to identify areas of concern, maintain a database and take actions
Store all outputs to analyse change and compare over time, accessible and reportable at any stage.