Modeling streamflow from coupled airborne laser scanning and acoustic Doppler current profiler data
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Abstract
The rating curve enables the translation of water depth into stream discharge through a reference cross-section. This study investigates coupling national scale airborne laser scanning (ALS) and acoustic Doppler current profiler (ADCP) bathymetric survey data for generating stream rating curves. A digital terrain model was defined from these data and applied in a physically based 1-D hydraulic model to generate rating curves for a regularly monitored location in northern Sweden. Analysis of the ALS data showed that overestimation of the streambank elevation could be adjusted with a root mean square error (RMSE) block adjustment using a higher accuracy manual topographic survey. The results of our study demonstrate that the rating curve generated from the vertically corrected ALS data combined with ADCP data had lower errors (RMSE = 0.79 m3/s) than the empirical rating curve (RMSE = 1.13 m3/s) when compared to streamflow measurements. We consider these findings encouraging as hydrometric agencies can potentially leverage national-scale ALS and ADCP instrumentation to reduce the cost and effort required for maintaining and establishing rating curves at gauging station sites similar to the Röån River.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Modeling streamflow from coupled airborne laser scanning and acoustic Doppler current profiler data |
| Series title | Hydrology Research |
| DOI | 10.2166/nh.2016.257 |
| Volume | 48 |
| Issue | 4 |
| Year Published | 2016 |
| Language | English |
| Publisher | IWA |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 16 p. |
| First page | 981 |
| Last page | 996 |
| Google Analytic Metrics | Metrics page |