|Citation||Kerr Wood Leidal Associates Limited. 2010. Chapman Creek Flood Assessment. Prepared for District of Sechelt.|
|Organization||District of Sechelt|
|Abstract/Description or Keywords||Chapman Creek drains a multi-use watershed on BC’s Sunshine Coast, supporting a
diverse range of values that includes forestry, recreation, anadromous and resident
fisheries resources, and community water supply. At the mouth, the creek passes through
the community of Sechelt, BC and the Sechelt First Nation – Tsawcome I.R. No 1 lands.
Figure 1-1 shows the location of the watershed.
Historically, steep slopes in the Chapman Creek watershed have produced landslides
capable of reaching and impounding the creek. Such conditions create the potential for
“debris floods”, a type of flood that is transitional to debris flow and in which flood
discharge is heavily charged with sediment, mud, boulders, and woody debris. Debris
floods often result from the overtopping and failure of a landslide that temporarily dams
the creek. Two large historical discharges recorded on Chapman Creek in the 1960s may
have been the result of debris floods.
Chapman Creek has formed a large alluvial fan a short distance upstream from the Strait
of Georgia. A number of developed and vacant residential properties are located on the
fan. The District of Sechelt (the District) has also received a number of land
development proposals for the creek fan. The District’s Official Community Plan
identifies the Chapman Creek Alluvial Fan as part of an Environmental and Geotechnical
Development Permit area. The fan has been recognized as a flood hazard area by Golder
(1993), the Ministry of Environment and the Ministry of Transportation.
|Regional Watershed||Howe Sound & Sunshine Coast|
|Sub-watershed if known||Chapman Creek|