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Found 10 records similar to Hydrology: 10 Year Peak Flow Isolines (Historical)
100 year peak flow isolines in cubic metres per second (m3/s) for 100 square kilometre watersheds and 100 year return period
Normal Annual Runoff for 1961 - 1990, in mm
Zones of homogeneous low flow characteristics
Watershed boundary delineated for Canada-BC hydrometric stations. Currently, watersheds were delineated using 1:50,000 scale boundaries in 1996, and many watersheds encompass entire drainages, instead of just the upstream watersheds. Note - Not yet available, but we are in the process of generating BC hydrometric station upstream watersheds using updated base data, using the following method: Within BC, watershed boundaries are based on the 1:20,000-scale Freshwater Atlas fundamental watersheds, and trimmed using the BC TRIM DEM used to approximate the height-of-land at the station locations. Outside of BC, but within Canada, watershed boundaries were approximated using Canada CDED DEM data for delineation (no "stream burning" was used) and some manual editing of boundaries was done to approximately match hydrology data after the fact.
The Grasslands National Park monitors daily the peak flow rates of the Frenchman River and Rock Creek every year from March to August; this measure reports on the integrity of a natural disturbance process by comparing the current distribution of peak flow rates to a historic baseline from the early 1900s.
Zones that represent areas of homogeneous hydrologic and geomorphological characteristics
Historical floodplain boundaries in BC with a descriptive feature name for each floodplain area (i.e., 200-year floodplain, alluvial fan, or nothing/out-of-floodplain). Digitized from hardcopy 1:5,000 Floodplain Mapsheets for each project area
Lines indicating the limits of the historical floodplain boundary study areas in BC. Digitized from hardcopy 1:5,000 Floodplain Mapsheets for each project area
Index outlining historical floodplain mapping areas. Contains links to Floodplain Mapping Reports stored in Ecological Reports Catalogue (EcoCat)
Hydrological inputs and outputs determine water depth, flow patterns, and duration and frequency of flooding. The seasonal pattern of changes in a wetland’s water level is called the hydroperiod. Year-to-year variability of hydroperiod is related to climate and site specific conditions. Hydrologic conditions primarily affect abiotic factors such as nutrient availability, soil chemistry, and water chemistry which all, in turn, determine the biotic components (species composition, species richness, primary productivity) of wetland ecosystems.