Your search found 2 records
1 Bras, R. L.; Seo, D. J.. 1987. Irrigation control in the presence of salinity: Extended linear quadratic approach. Water Resources Research, 23(7):1153-1161.
(Location: IWMI-HQ Call no: PER Record No: H03197)
2 Kim, S.; Shen, H.; Noh, S.; Seo, D.-J.; Welles, E.; Pelgrim, E.; Weerts, A.; Lyons, E.; Philips, B. 2021. High-resolution modeling and prediction of urban floods using WRF-hydro and data assimilation. Journal of Hydrology, 598:126236. (Online first) [doi: https://doi.org/10.1016/j.jhydrol.2021.126236]
Flooding ; Forecasting ; Urban areas ; Hydrology ; Models ; Precipitation ; Rainfall-runoff relationships ; Stream flow ; Observation ; Catchment areas ; Land cover / USA / Texas / Dallas-Fort Worth Area / Arlington / Grand Prairie / Fish Creek Catchment / Johnson Creek Catchment / Cottonwood Creek Catchment
(Location: IWMI HQ Call no: e-copy only Record No: H050332)
(6.43 MB)
We assess the impact of increasing the resolution of hydrologic modeling, calibration of selected model parameters and assimilation of streamflow observation toward event-based urban flood modeling and prediction using WRF-Hydro in the Dallas-Fort Worth area (DFW). We use quantitative precipitation estimates at 500-m 1-min resolution from the Collaborative Adaptive Sensing of the Atmosphere radar network for observed rainfall, Stepwise Line Search for calibration, and fixed-lag smoothing for data assimilation (DA). The model domain is a 144.6 km2 area comprising 3 urban catchments in Arlington and Grand Prairie in the middle of DFW. It is shown that event-specific calibration of 6 WRF-Hydro parameters is largely successful in simulating hydrographs at the catchment outlets particularly for the most important rising limbs, but less so for attenuated peaks or fast-receding falling limbs. A spatial resolution of at least 250 m was necessary for the land surface model (LSM) to delineate small catchments and hence to capture catchment-wide rainfall with acceptable accuracy. Simulations at selected combinations of resolutions, 250 and 125 m for the LSM and 250, 125, 50 m for the routing models, showed mixed results. The overall results indicate that, in the absence of resolution-specific prescription and calibration of channel routing parameters, a resolution of 250 m for both the LSM and routing models is a good choice in terms of performance and computational requirements, and that, in the absence of high-quality calibration and continuous simulation of streamflow, DA is necessary to initialize WRF-Hydro for event-based high-resolution urban flood prediction.
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