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Geomorphology
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OUR GEOMORPHOLOGY SERVICES


A thorough understanding of the physical processes involved in tidal and fluvial environments is essential to the design of our projects and at cbec we work hard at understanding these processes. Understanding the geomorphic setting of our project sites is always critical.


cbec provides geomorphic services in rivers, estuaries and tidal zones. We conduct:

  • Geomorphic interpretation and assessment
  • Historical channel analysis
  • Habitat mapping
  • GPS mapping of geomorphic features
  • Stream power assessment

cbec is a pioneer in the geomorphology sector:

  • RiverRAT
We are developing the application of RiverRAT tool – assessments in impacted Scottish rivers. Read more at www.restorationreview.com

  • Stream Susceptibility Assessment System (SSAS):
cbec also recently developed the Stream Susceptibility Assessment System (SSAS) based on a three tiered approach:

Tier 1 involves the development of a combined susceptibility and applicability decision support tool. This includes conducting a watershed scale GIS- and remote sensing-based screening analysis of various methodologies to quantify stream susceptibility to hydromodification.

Tier 2 involves conducting Rapid Geomorphic Assessments (RGA) for identified and prioritised areas that are screened to have high and low erosion potential in Tier 1. This field-based study also provides calibration and validation for Tier 1.

Tier 3 identifies key geomorphic thresholds (e.g. relationships between channel slope, median particle size, and drainage area for stable and unstable channels, critical bank heights in various channel materials, channel response to changes in flow and sediment supply, etc.) from comparison of stable and unstable channels.


As a part of the SSAS, we apply a form of the Fluvial Audit developed by cbec staff (link above):

   
 




 

A thorough understanding of the physical processes involved in tidal and fluvial environments is essential to the design of our projects and at cbec we work hard at understanding these processes. For example, understanding the geomorphic setting of our project site is essential.

Top left: Relatively pristine situations should be preserved wherever possible.
 
Top right: More degraded situations should be restored through stabilisation and re-contouring.

Bottom left: In situations where the system has degraded historically and reached a new equilibrium, we should manage for the new condition.
 
 
 

EXAMPLE USES:


  Fluvial Auditing
River Spey, Tulchan Estate.



  A stream power assessment, River Derwent


 


Fluvial audit GIS output from River Mallart, a tributary of River Naver, Sutherland.

Please click Example Fluvial GIS Output Plots for full size images.




Specific Stream Power analysis, Tulchan Estate




Hydrology, Hydraulics, Geomorphology, Design, and Field Services - these are our Technical Services. See Focus Areas for how we combine them all...




cbec… pioneering new developments in geomorphology.
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