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Propagation of CMORPH rainfall errors to REW streamflow simulation mismatch in the upper Zambezi Basin
- Source :
- Journal of Hydrology: Regional Studies, Vol 38, Iss, Pp 100966-(2021), Journal of Hydrology: Regional Studies, 38:100966, 1-14. Elsevier
- Publication Year :
- 2021
-
Abstract
- Study region This research is carried out in the Kabompo Basin, a headwater catchment of the Zambezi Basin which has an area of 67,261 km2. Kabompo River originates in North-Western Province of Zambia between the Zambezi and Congo River Basins. Study focus This study focuses on error propagation of the National Oceanic and Atmospheric Administration (NOAA) Climate Prediction Center-MORPHing (CMORPH) rainfall product on simulated streamflow. Assessments are based on automated multi-objective calibration of the Representative Elementary Watershed (REW) model (2006–2012). Parameters of the model were optimized using the ɛ-NSGAII algorithm. Assessments on error propagation targeted streamflow modelling for hydrograph shape and volume, specific hydrograph characteristics, and water balance composition. New hydrological insights for the region By use of multiple objective functions, this study shows that uncorrected CMORPH results in substantial augmentation of rainfall error to streamflow simulation mismatch whereas bias corrected estimates result in attenuation of error. This study shows that analysis for water balance composition has great potential to improve application of satellite precipitation products in water management and decision making in the Zambezi basin. This study advises optimization of model parameters for each respective rainfall input data source so to identify outcomes and effects of respective rainfall data sources on the simulated water balance. Optimization of parameter sets by ɛ -NSGAII results in optimal parameter sets that attributes to findings on the water balance composition and closure.
- Subjects :
- Physical geography
Watershed
UT-Gold-D
Calibration (statistics)
Model calibration
Drainage basin
Hydrograph
Structural basin
Error
Water balance
Streamflow
Earth and Planetary Sciences (miscellaneous)
Objective functions
Water Science and Technology
geography
Propagation of uncertainty
QE1-996.5
geography.geographical_feature_category
Geology
Zambezi basin
GB3-5030
Climatology
ITC-ISI-JOURNAL-ARTICLE
Environmental science
Bias correction
ITC-GOLD
Subjects
Details
- Language :
- English
- ISSN :
- 22145818
- Volume :
- 38
- Database :
- OpenAIRE
- Journal :
- Journal of Hydrology: Regional Studies
- Accession number :
- edsair.doi.dedup.....47d2412c5e633cc8de6dcd5b77ffba4c