| Shope, CL; Bartsch, S; Kim, K; Kim, B; Tenhunen, JD; Peiffer, S; Park, J-H; Ok, YS; Fleckenstein, JH; Koellner, T: A weighted, multi-method approach for accurate basin-wide streamflow estimation in an ungauged watershed, Journal of Hydrology, 494, 72-82 (2013) [Link] | |
| Abstract: River discharge is a commonly measured hydrologic variable; however, estimate uncertainty is often higher than acceptable limits. To quantify method limitations and spatiotemporal variability, a multi-year hydrologic flow partitioning investigation was completed under monsoonal conditions in the ungauged complex terrain of the Haean Catchment, South Korea. Our results indicate that sediment transport from a single annual monsoonal event can significantly modify the channel cross-sectional area resulting in inaccurate stage-discharge rating curves. We compare six discharge measurement methods at 13 locations that vary in slope from 1% to 80%, with discharge ranging up to four orders in magnitude, which enabled us to weight the accuracy of each method over a specific range in discharge. The most accurate discharge estimation methods are the weir, the acoustic Doppler current profiler, and the in-stream velocity area method; however, under certain conditions each of these methods is less desirable than other methods. The uncertainty in the three methods is on average 0.4%, 4.7%, and 6.1% of the total discharge, respectively. The accuracy of the discharge estimates has a direct influence on the characterization of basin-wide hydrologic partitioning, which can lead to significant variability in sediment erosion rates and nutrient fate and transport. |
Upcoming ...
Upcoming ...
| BayCEER Colloquium: |
|---|
| Th. 2024-04-25 Perspectives and challenges in the restoration and conservation of two isolated habitats: gypsum and cliffs |
| BayCEER Short Courses: |
| We. 2024-04-24 now Mobile Film Making Workshop (for PhDs/PostDosc/Profs of BayCEER) |
| Fr. 2024-04-26 Mobile Film Making Workshop (for students of BayCEER) |
| Ecological-Botanical Garden: |
| Fr. 2024-04-26 Aktion | Kräuterreich & regional: Backkunst im ÖBG (zus. mit HWK) |
| Fr. 2024-04-26 Führung | Erdbeer-Minze und Zimmerknoblauch: Gewürzkräuter |