ABSTRACT
This chapter presents the evaluation of uncertainties in Quantitative Precipitation estimates from Multisensor precipitation estimates by comparison with a high density rain gauge network. It addresses a methodology to evaluate uncertainty due to hydrologic model grid spacing and rainfall resolution. The Test bed subwatershed (TBSW) is useful for research purposes and represents a "real world" laboratory to study the predictability limits due to aggregation of high-resolution inputs in a hydrologic model. In the TBSW, a dense rain gauge network was installed as part of this investigation and a pressure transducer for water level measurements. Three variables are important to evaluate in flash flood forecasting, providing information of the flood magnitude, spread and lead time for the emergency management agencies. Box plots of each ensemble permit visualization of the spread of the solution due to parameters perturbations at each rainfall and model scale.
