Riparian Zone Variability In the Foothills of Alberta



Abstract
Introduction
Data
Methods
Results
Discussion
Sources of error
References
Results


Working with a large dataset

One of my biggest discoveries was how much computing power is required to perform a single step during the analysis of this dataset.  The number of stream segments in each watershed was so large that buffering and zonal analyses took around six hours, and frequently crashed the computers.  Unfortunately time constraints have meant that analysis could only be thoroughly performed on the Wigwam Creek watershed, which includes my thesis study area.   

Topographic variability

Strong patterns did not emerge from the correlations performed.  A moderate relationship between riparian zone elevation and terrain roughness indicates that riparian zones are generally steeper along upland, headwater streams.  A similar relationship was found between streambed roughness and elevation.  However, no relationship was found between streambed or riparian roughness and Strahler order.  A weak positive relationship between stream and riparian zone roughness was also detected.

Variables compared
Correlation
Riparian roughness: Elevation
0.4
Streambed roughness: Elevation 0.45
Streambed roughness: Riparian roughness
0.3
Riparian roughness: Strahler order
-0.02
Streambed roughness: Strahler order -0.05

st dev

Spruce Riparian forest


Category
Proportion
of watershed
Non-forested
10%
Forested
90%
Old growth spruce
36%

In Wigwam watershed, 36% of all riparian zones are similar to those I studied.

Variables compared
Correlation
Majority old spruce: Strahler order 
0.01
Majority old spruce: Elevation 
-0.16

riparian forest


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Discussion