Alouette Valley Association

MRD has now provided us with provided details of the hydrology study The study will cost $100,000 and the winning bidder was Northwest Hydraulic Consultants. The RFP’s scope of work was determined from Alouette Rivers Flood Management Task Force’s recommendations by the Municipal Engineer. We are assured that land-use, the current & future zoning, as per OCP, will be included in this study.

Phase 1. Review flood hazard problems and available information; planning the technical investigations
Phase 2. Technical investigations: climate and hydrological analyses; hydraulic modeling of rivers and floodplain; mapping of flood events
Phase 3. Results Assessment and Reporting: assess results and define potential flood management strategies and options. Define additional flood mitigation measures

The minimum to be determined with the undergoing study is:
* Base flows of the two rivers
* Peak flow records and related rainfall and/or snowmelt incidence
* Discharges of the two rivers
* Flood flow analyses and prediction (at least five typical flood events)
* Flood extent, flow routing (at least five typical flood events)
* Flood frequency, return period and intensity analysis
* Rainfall events and flood events correlation
* Stage-discharge curves for the two rivers
* Water level at the surveyed cross sections for different flood scenarios sequences during flood events (at least five typical flood events)
* Impact of channel constriction/narrowing
* Potential benefit of channel dragging and gravel bars scalping
* Guidance for flood proofing activities in the area
* Possible locations for log jam accumulation and channel obstructions
* Flood control recommendations

The study is now long overdue and any remediation recommendations will now not be possible this year. District staff do not expect the study to be complete until the end of the year.

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