| Abstract/Description or Keywords |
This study was initiated by Riverside as part of the total resource-planning project for Upper Mission Creek area and to address concerns relating to the high level of suspended sediment and bedload in Mission Creek following the 1997 freshet and the extent of channel disturbance through private land downstream. Mission Creek is located in the western portion of the Okanagan Highland and is the largest tributary to Okanagan Lake. The main-stem of Mission Creek, from Okanagan Lake to the confluence with Fish Hawk Creek, is approximately 60 km in length. Fish Hawk Creek, from the confluence of Mission Creek to Fish Hawk Lake is approximately 12 km in length. The estimated size of the Mission Creek Watershed is 816 krn2. Mission Creek enters Okanagan Lake near the southeast end of Kelowna. A total of 95 active and inactive landslides and erosional features were identified within the lettered zones in the study area. The landslides and erosional features are categorized as debris slides,debris slumps, bedrock slumps, erosional undercutting and a combination of debris slides and erosional features. Anecdotal evidence and visual observations confirmed the actual occurrence of landslide events in the springs of 1974 and 1997. The majority of these events are in varying stages of revegetation. Several of these features displayed episodic behavior with almost 100% revegetation observed in the upper segments and 0 to 20% revegetation in the lower segments. terrain stability, geomorphology, channel, landslide, surficial geology |
