?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F10467%2F&rft.title=ASSESSMENTS+OF+MULTISCALE+PRECIPITATION+DATA+FUSION+AND+SOIL+MOISTURE+DATA+ASSIMILATION+AND+THEIR+ROLES+IN+HYDROLOGICAL+FORECASTS&rft.creator=Wang%2C+Shugong&rft.description=Precipitation+is+the+most+important+input+for+hydrological+simulations+and+soil+moisture+contents+(SMCs)+are+the+most+important+state+variables+of+hydrological+system.+We+can+improve+hydrological+simulations+by+improving+the+quality+of+precipitation+data+and+assimilating+satellite-measured+SMC+data+into+land+surface+simulation.+Multiscale+data+fusion+is+an+effective+approach+to+derive+precipitation+data+due+to+the+multiscale+characteristics+of+precipitation+measurements.+Multiscale+data+assimilation+is+the+exact+approach+to+assimilate+satellite-measured+SMC+data+into+land+surface+simulations+when+measurements+and+model+simulations+are+not+at+the+same+spatial+resolution.+To+date%2C+no+systematic+assessments+of+these+approaches+have+been+conducted+in+hydrological+simulations.+For+the+purpose+of+improving+hydrological+forecast%2C+this+study+assesses+influences+of+precipitation+data+fusion+and+soil+moisture+data+assimilation+on+the+simulations+of+streamflow%2C+SMCs+and+evapotranspiration+over+14+watersheds+selected+from+the+Ohio+River+Basin.+%0D%0A%0D%0AAs+the+technical+basis+of+this+study%2C+a+large-scale+flow+routing+scheme+and+a+parameter+calibration+scheme+with+multiple+precipitation+inputs+are+developed+for+Noah+LSM.+A+multiscale+data+fusion+algorithm%2C+namely+Multiscale+Kalman+Smoother+(MKS)+based+framework%2C+which+plays+an+important+role+in+multiscale+precipitation+data+fusion+and+multiscale+soil+moisture+data+assimilation%2C+is+assessed+in+a+large+experimental+site+with+2246+precipitation+events+in+2003.+Three+precipitation+data+products+are+derived+by+fusing+NLDAS-2+precipitation+data+product+and+NEXRAD+MPE+precipitation+data+product+with+the+MKS-based+framework.+For+the+assessment+over+the+14+watersheds+in+three+individual+years%2C+essential+improvements+of+hydrological+simulation+have+been+found+for+a+half+number+of+cases.+Findings+of+this+assessment+show+that+precipitation+data+fusion+is+a+statistically+effective+approach+to+improve+hydrological+simulations.+To+assess+the+influences+of+soil+moisture+data+assimilation+on+hydrological+simulation%2C+AMSR-E+SMC+data+are+assimilated+into+land+surface+simulation+by+Noah+LSM.+Results+show+that+soil+moisture+data+assimilation+has+not+improved+hydrological+simulations+for+most+of+cases+because+AMSR-E+data+underestimate+SMC+compared+with+model+simulations.+However%2C+for+those+cases+in+which+precipitation+data+overestimate+real+precipitation%2C+the+soil+moisture+data+assimilation+has+been+proved+as+an+effective+approach+to+improve+hydrological+simulations.&rft.date=2012-02-02&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F10467%2F1%2FSHUGONG_WANG_ETD.pdf&rft.identifier=++Wang%2C+Shugong++(2012)+ASSESSMENTS+OF+MULTISCALE+PRECIPITATION+DATA+FUSION+AND+SOIL+MOISTURE+DATA+ASSIMILATION+AND+THEIR+ROLES+IN+HYDROLOGICAL+FORECASTS.++Doctoral+Dissertation%2C+University+of+Pittsburgh.++++(Unpublished)++