Journal
HYDROLOGICAL SCIENCES JOURNAL
Volume 58, Issue 7, Pages 1434-1444Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02626667.2013.831419
Keywords
hydrological modelling; LiDAR; Prairie Pothole Region; water budget; wetland
Categories
Funding
- US Department of Agriculture's Conservation Effects Assessment Program (CEAP)-Wetlands
- US Geological Survey's Geographic Analysis and Monitoring (GAM)
- Global Change Research Programs
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Hydrological processes of the wetland complex in the Prairie Pothole Region (PPR) are difficult to model, partly due to a lack of wetland morphology data. We used Light Detection And Ranging (LiDAR) data sets to derive wetland features; we then modelled rainfall, snowfall, snowmelt, runoff, evaporation, the fill-and-spill mechanism, shallow groundwater loss, and the effect of wet and dry conditions. For large wetlands with a volume greater than thousands of cubic metres (e.g. about 3000 m(3)), the modelled water volume agreed fairly well with observations; however, it did not succeed for small wetlands (e.g. volume less than 450 m(3)). Despite the failure for small wetlands, the modelled water area of the wetland complex coincided well with interpretation of aerial photographs, showing a linear regression with R-2 of around 0.80 and a mean average error of around 0.55 km(2). The next step is to improve the water budget modelling for small wetlands.
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