GRMP 2018 Bi-annual Review Meeting Peace / High Level Districts - - PowerPoint PPT Presentation

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GRMP 2018 Bi-annual Review Meeting Peace / High Level Districts - - PowerPoint PPT Presentation

Jan 14, 2023 260 likes •485 views

ALBERTA TRANSPORTATION GRMP 2018 Bi-annual Review Meeting Peace / High Level Districts Highway 2 East Hill Sites Geo-referenced Photos + Historical Sat Imagery Peace River Region - Highway 2 - East Hill Site area directly east of the

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ALBERTA TRANSPORTATION GRMP 2018 Bi-annual Review Meeting Peace / High Level Districts Highway 2 East Hill Sites Geo-referenced Photos + Historical Sat Imagery

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Peace River Region - Highway 2 - East Hill

  • Site area directly east of the

Town of Peace River

  • Multiple sites within a 4 km

segment of the Highway running along on the south- facing wall of the Heart River Valley.

  • Widespread and highly active

mass wasting processes that include channelized erosion, earth flows, deep and shallow landslides within colluvium and glaciolacustrine sediments (Glacial Lake Matthews).

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Peace River Heart River v HWY 2 N

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CHALLENGES

  • Large site with many active, ongoing and interacting processes
  • Many of the geohazards do not directly impact the highway but could

lead to future instability or retrogressive processes that are cheaper / more practical to mitigate earlier (i.e. proactive approach)

  • Limited time on ground during annual inspections – important to

establish what are the existing conditions, what has changed and setup consistent framework of comparison to make efficient use of time on site.

  • Large processes that can be difficult to interpret or understand

broader site implications from the ground  LiDAR and aerial imagery tools can help

  • Annual viewing of site (or limited instrumentation) – difficult to

establish timeline or evaluate rate of geohazard processes

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  • GIS Workspace – all photo locations, waypoints,

tracks, aerial imagery, marked terrain features, ect  can be quickly compared with previous years (photo comparison still manual)

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2009

Photo Comparison

2017

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2009

Photo Comparison

2017

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2014

Photo Comparison

2016

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2009

Photo Comparison

2017

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Historic Satellite Imagery

2002

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Historic Satellite Imagery

2002

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Historic Satellite Imagery

2012

1 m LiDAR (2007)

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Historic Satellite Imagery

2013

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Historic Satellite Imagery

2016

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2017 2009

Photo Comparison

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Historic Satellite Imagery

2013 2016

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2016

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  • Comparison methodology used in the

development of the site plan with focus

  • n areas that have observable rates of

activity and/or future potential to cause instability or hazard to the highway

  • Combination of LiDAR and

satellite/aerial imagery allows broader view of site processes

  • Historic imagery provides better context

to the development process and rate of mass waste events

  • Helps create target areas for next year

and guide the inspection process, esp. for future inspectors

  • Process could be refined with new

technology and more frequent data gathering (e.g. drone survey)

Conclusions