Landform & Erosion

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

Module - Landform & Erosion - Decipher
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.

Landform Metrics

Erosion Gullies
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
Ripping Deviation
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).
Decipher - Landform Metrics - Erosion Gully Depth

Erosion Gully Depth

Vertical distance between the surface and the floor of the gully
Decipher - Landform Metrics - Erosion Gully Width

Erosion Gully Width

Horizontal distance between the two edge of the opening of the gully
Decipher - Landform Metrics - Erosion Gully Spacing

Erosion Gully Spacing

Horizontal distance of gully features which indicate the local clustering of gullies
Decipher - Landform Metrics - Erosion Gully Cover

Erosion Gully/Rill Cover

The horizontal coverage of erosion gullies
Decipher - Ripping Deviation

Batter Ripping Deviation

Angled deviation of the ripping against the contours
Bund
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.
Batter
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.
Berm
Horizontal ledge that enforces stability of a slope within the landform. Constructed as angled (5o in ward) floor between two batters.
Decipher - Landform Metrics - Bund Height

Crest or abandonment Bund Height

Distance between the top of a crest bund and edge of the berm
Decipher - Landform Metrics - Bund Width

Crest or abandonment Bund Width

Horizontal distance across the crest bund
Decipher - Landform Metrics - Batter Slope Angle

Batter Slope Angle

The slope angle that is formed between the horizontal plane and batter wall
Decipher - Landform Metrics - Batter Slope Length

Batter Slope Length

The absolute angled length of the slope between the top and bottom of a batter
Decipher - Landform - Batter Height

Batter Height

Vertical distance between top and bottom of the batter
Decipher - Landform - Berm Angle

Berm Slope Angle

The slope angle that is formed between the horizontal plane and the berm floor
Decipher - Landform - Berm Width

Berm Width

The horizontal distance between the base of the adjacent batter and the edge of the berm

Batter, berms, & crest bund measurements

Geoprocessing for geometric deconstruction to identify and measure Batter Height, Batter Slope Angle, Batter Slope Length, Berm Width, Berm Slope Angle, Crest Bund Height, Crest Bund Width.

Measure erosion gullies

Harnessing geometric construction of landform geometry measures, you can easily identify erosion gully area, volume, mean, maximum and average width over time to determine stability.

3D visualisation & navigation

Visualise landform geometry and erosion gully measurement outputs over time in a 3D interactive view, provided by the Potree technology. Alternatively, you can import any type of LiDAR datasets for basic viewing and measurements.

Landform & erosion actions

Assign wasterock landform related preventative and corrective actions to accountable team members with the ability to incorporate a second layer of approval and escalation of overdue actions, all with associated and automatic notifications.

How Landform works

1
Data capture
Data is first captured and collected from various sources including drone/UAV, satellite, ground based radar or LiDAR.
2
Import
Captured data is processed to create Digital Elevation Model (DEM) of the landform and is imported into the Decipher platform
3
User Delineation
Visualise DEM in 3D and mark up areas of interest including batter, berm and bunds and the slope direction
4
Geoprocessing
Based on user input, Decipher will process the marked up file and run our landform algorithms over the dataset
5
Geometry Metric Outputs
Batter height, length, angle, Berm width & angle and Bund height & width are populated
6
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.
7
Take Action
The user can view these metrics on the screen in 3D and 2D to identify areas of concern, maintain a database and take actions
8
Timeseries
Store all outputs to analyse change and compare over time, accessible and reportable at any stage.

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