- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- Forest groundwater hydrology: implications for terrain...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
Forest groundwater hydrology: implications for terrain stability in coastal British Columbia Jaakkola, Jussi
Abstract
The groundwater regimes of two coastal British Columbia field sites in landslide prone terrain have been assessed. The first site involved instrumentation of a landslide headscarp area with tensiometers and piezometers to characterize the groundwater regime over one year. Piezometers were designed and manufactured specifically for use in this project. Data collected from the study site indicate a highly variable distribution of storm-induced positive pore pressures across a small area. Field observations combined with data analysis suggest that macropore flow is responsible for the pore pressure distribution and rapid drainage. The second site involved analysis of piezometric and precipitation records from the Carnation Creek Experimental Watershed. Analysis of records spanning almost 8-years revealed a number of observations of temporal and spatial distributions of groundwater behavior that deviate from simple hydrologic models. The study area is characterized by frequent occurrence, and a complex spatial distribution of high groundwater levels. Most piezometric sites displayed a 'capped' groundwater level that is rarely exceeded with increasing precipitation. Analysis of records also showed that forest harvesting could cause an increase in the response of soil water to precipitation. An increase was manifested in some, but not all of the chosen study piezometers that were within the harvested area, suggesting that the impacts of harvesting on groundwater may be site-specific. A model of groundwater hydrology that parameterizes the effect of topography on the distribution of watershed groundwater levels was assessed for its ability to predict observed piezometric recordings from a small coastal watershed. The hydrologic model is a component of a terrain stability model named SINDEX. Piezometric recordings were available for a number of hillslope positions and aspects. The model was found to have satisfactory predictive capabilities of relative groundwater levels if conservative input parameters are used.
Item Metadata
Title |
Forest groundwater hydrology: implications for terrain stability in coastal British Columbia
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
1998
|
Description |
The groundwater regimes of two coastal British Columbia field sites in landslide prone terrain have been
assessed. The first site involved instrumentation of a landslide headscarp area with tensiometers and
piezometers to characterize the groundwater regime over one year. Piezometers were designed and
manufactured specifically for use in this project. Data collected from the study site indicate a highly
variable distribution of storm-induced positive pore pressures across a small area. Field observations
combined with data analysis suggest that macropore flow is responsible for the pore pressure distribution
and rapid drainage.
The second site involved analysis of piezometric and precipitation records from the Carnation Creek
Experimental Watershed. Analysis of records spanning almost 8-years revealed a number of observations
of temporal and spatial distributions of groundwater behavior that deviate from simple hydrologic models.
The study area is characterized by frequent occurrence, and a complex spatial distribution of high
groundwater levels. Most piezometric sites displayed a 'capped' groundwater level that is rarely exceeded
with increasing precipitation. Analysis of records also showed that forest harvesting could cause an increase
in the response of soil water to precipitation. An increase was manifested in some, but not all of the chosen
study piezometers that were within the harvested area, suggesting that the impacts of harvesting on
groundwater may be site-specific.
A model of groundwater hydrology that parameterizes the effect of topography on the distribution of
watershed groundwater levels was assessed for its ability to predict observed piezometric recordings from a
small coastal watershed. The hydrologic model is a component of a terrain stability model named SINDEX.
Piezometric recordings were available for a number of hillslope positions and aspects. The model was
found to have satisfactory predictive capabilities of relative groundwater levels if conservative input
parameters are used.
|
Extent |
13239023 bytes
|
Genre | |
Type | |
File Format |
application/pdf
|
Language |
eng
|
Date Available |
2009-05-25
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0063787
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Graduation Date |
1998-11
|
Campus | |
Scholarly Level |
Graduate
|
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.