The Upper Penticton Creek Watershed Experiment (UPC) is a paired-watershed study into the effects of forest harvesting on water resources. The goals of this experiment are to improve our understanding of basic hydrologic processes and to develop effective forest practices guidelines that sustain the timber and water resources of the BC interior plateau. Building on the long-term UPC database, the objectives of this continuing project are to quantify: spatial differences in snow accumulation in two of the experimental watersheds, roads affects on the timing and magnitude of the spring runoff peak, the water balances of clearcut and young pine stands relative to a mature forest, and changes in stream temperature and soil and stream nitrogen fluxes with forest cover removal. We are also working to improve techniques for automating stream sediment monitoring. The UPC experiment addresses questions fundamental to our understanding of hydrologic processes in upland forest environments and headwater streams of the Okanagan Plateau. Results of the research at UPC will provide practical information to assist in forest development planning, water resource management, and aquatic habitat protection. The streamflow field research and numerical modelling will provide information regarding water supply consequences associated with increasing rates of forest cover removal. The snow and water balance research focus on improving operational estimates of hydrologic recovery. The soil nitrogen flux, physical and chemical water quality, and aquatic invertebrate work will provide information useful to water purveyors and in developing indicators of sustainability. The aquatic ecology work will provide direction to planners regarding ecologically sustainable opening sizes and the effectiveness of riparian buffers along small headwater streams.
Jordan Rosenfeld, Sandra Nicol.
Winkler, Rita D., Roach, Jean. 2006. Snow, road, soil moisture, and harvest distribution effects on streamflow at Upper Penticton Creek. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2006MR152