CGRG Bibliography of Canadian Geomorphology
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Author : Emaruchi, B.
Date : 1998.
Title : A hydrologic model for forested mountain watersheds.
Publication : Unpublished Ph.D. dissertation. University of Regina, Regina.
Issue :
Page(s) : 225 p.
Abstract
Hydrology of forested mountain watersheds is unique in term of processes of flow and complexity of their stream networks. It was found that in Kootenay River Basin, British Columbia, Canada, during May and August of each year, subsurface water and snowmelt is the main source of water supply in most streams. The purpose of this investigation is to develop a hydrologic model to simulate outflow hydrographs from forested mountain watersheds using remote sensing and geographic information systems techniques. The studied watershed was subdivided into a set of stream elements or the stream network by using the digital terrain elevation data. In each element, an artificial neural network system was used to classify the remotely sensed data into three major land covers found in the studied watershed: bare ground, forest, and grassland. The classified land covers were used as the basis for determining model inputs and parameters. The seepage of subsurface water in each element was calculated by using the Boussinesq's equation and Dupuit's assumptions. This seeping water enters the stream as the lateral inflow. The hydraulic routing in each stream element was calculated by using the Saint-Vennant's equations and solved numerically by using the finite element method. The flow from each stream element is combined with that from other streams and routed along the stream network until the watershed outlet is reached, then outflow hydrographs can be estimated. The model developed here was tested and compared with the recorded data from Kootenay River Basin and found that the average correlation coefficient between observed and simulated hydrographs was 0.90.
Bibliography of Canadian Geomorphology