Ministry of Forests, Lands and Natural Resource Operations

The Upper Penticton Creek Watershed

The Upper Penticton Creek watershed experiment is located on the Okanagan Plateau approximately 26 km northeast of Penticton, BC. It includes the watersheds of 240, 241 and Upper Dennis Creeks; all small headwater tributaries to Penticton Creek. Each watershed covers approximately 5 square kilometers and the area extends from 1600 to 2100 meters in elevation. These watersheds are typical of the upland source area supplying water to the Okanagan Valley.

Annually, 2 million cubic metres of water flow from each watershed. The highest daily flows occur in mid to late May, during snowmelt, and may reach 1.5 cubic meters per second. August through April low flows are often less than 0.01 cubic meters per second and are predominantly sustained by groundwater. Mean annual precipitation is 700 mm, approximately half of which falls as snow.

All watersheds are forested; 240 and 241 Creek with lodgepole pine and Upper Dennis Creek with Engelmann spruce, subalpine fir and some lodgepole pine. Mature trees are over 100 years old and up to 24 m tall. Soils are formed on morainal and glaciofluvial sediments derived from coarse-grained granitic rocks. Soils are coarse sandy-loam over loamy-sand in texture, with low water holding capacities, and are well or rapidly drained.

 

Location Map

Forest Cover Map