1,721,125 research outputs found
Use of Scale Recursive Estimation for multisensor rainfall assimilation: a case study using data from TRMM (PR and TMI) and NEXRAD
No full textThe paper shows an application of Scale Recursive Estimation (SRE) used to assimilate rainfall rates estimated during a storm event
from three remote sensing devices. These are the TMI radiometer and the PR radar, carried on board of the TRMM satellite and the
KNQA Memphis Weather Surveillance radar, belonging to the NEXRAD network, each one providing rain rate estimates at a different
spatial scale. The variability of rain rate process in scales is modeled as a multiplicative random cascade, including spatial intermittence.
The observational noise in the estimates is modeled according to a multiplicative error. System estimation, including process and observational
noise, is carried out using Maximum Likelihood Estimation implemented by a scale recursive Expectation Maximization (EM)
algorithm. As a result, new rainfall rate estimates are obtained that feature decreased estimation error as compared to those coming from
each device alone. The performance of the SRE-EM approach is compared with that of the latest methods proposed for data fusion of
multisensor estimates. The proposed approach improves the current methods adopted for SRE and provides an alternative for data
fusion in the field of precipitation
Modified river hydraulics and habitat suitability in presence of woody debris: a flume experiment
No full textImpact of potential climate change on crop yield and water footprint of rice in the Po valley of Italy
No full textRegional estimation of Snow Water Equivalent using Kriging: a preliminary study within the Italian Alps
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Il bilancio idrologico nei bacini a forte contributo nivale: il caso del Torrente Mallaro.
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