[PDF] Top 20 A study on WRF radar data assimilation for hydrological rainfall prediction

... resolution rainfall forecasts at the catchment ...the rainfall forecasts from the mesoscale NWP model are less accurate than predictions based on a simple advection of the radar echoes (Austin et ... See full document

... Data assimilation has been shown to be an efficient way in improving the quality of the WRF rainfall products (Liu et ...The WRF model provides a three-dimensional variational (3DVar) ... See full document

... case study, Mazzoleni et ...measured rainfall data to reproduce the streamflow hydrograph at the basin outlet well (call this post-event simulation “scenario ...predicted rainfall fields that ... See full document

... through radar reflectivity is associated with various sources of errors such as ground clutter, partial beam occultation, beam blockage and attenuation effects ...of radar data sources are the main ... See full document

... measure hydrological variables, such as water level or precipitation, in a more distributed ...of hydrological monitoring, established in 2009, of rainfall and streamflow values within the Andean ... See full document

... multiple radar reflectivity data with a three-dimensional variational (3-D-Var) assimilation system on a heavy precipitation event is ...numerical prediction model and a decision-support ... See full document

... of radar data is often limited by in- creased uncertainties compared to ground rainfall measure- ments due to nonlinearities in the rainfall-reflectivity rela- tionship, ground clutter and ... See full document

... Sequential data assimilation using the Ensemble Kalman Filter provides a tool that is both efficient and robust for a real-time modelling ...a hydrological system is the soil moisture, which recently ... See full document

... improve hydrological forecasting, especially high flood prediction. Data assimilation was found to be one of the main tools to achieve this task (Seo et ...(variational data ... See full document

... The assimilation of appropriate observations into the NWP system can help improve the initial conditions and even initialize convective-scale events (Sokol, 2009; Liu, Bray, & Han, ...the assimilation ... See full document

... in rainfall patterns directly impact hydrological pro- cesses overall and impact particularly the timing and mag- nitude of ...weather prediction (NWP) ...simulated rainfall is used to drive a ... See full document

... weather prediction of rapidly developing convective sys- ...the radar antenna and variations in the atmospheric refractive ...the radar ray paths with respect to those expected under standard ... See full document

... of radar, there are recent advances in the appli- cation of dual-polarized radars which enable accurate QPE assessment using polarimetric parameters ...a radar signal char- acterizes the orientation of the ... See full document

... Hill model data show that hydrological rainfall varied spatially across the hill form; and the pattern of rainfall intensity differed as a function of meteorological rainfall intensity, [r] ... See full document

... A better approach in dealing with this data has been compassed by a student made website called gopuc.com. Here all the data is well organised and presented with good filters. In the section where our paper ... See full document

... (Next-Generation Radar, Smith et al., 1996) rain- fall data to improve the river forecasts of the National Weather Service (NWS) of the US using its existing hy- drological models applied in a lumped and ... See full document

... the assimilation window, which is one of the key aspects of any data assimilation system, has to be ...these data, which is essential to properly characterize fast developing and moving ... See full document

... the data, VEnKF es- timates (50 ensembles) and the model simulation, here re- ferred to as the truth, is shown for all 8 wave meter ...current study is not really data assimila- tion for the purpose ... See full document

... Groundwater heads are measured bi-hourly in nine wells (Fig. 1) using Eijkelkamp mini divers. The divers were in- stalled in these wells in November 2012, and thus the length of the time series is limited. Moreover, due ... See full document

... this true model. The same model, but with perturbed param- eter values, denoted the base model, forms the basis of the ensemble that is used for data assimilation. Note that both the true model and the base ... See full document