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Author (up) Siderius, C.; Biemans, H.; Kashaigili, J.J.; Conway, D. url  openurl
  Title Going local: Evaluating and regionalizing a global hydrological model – simulation of river flows in a medium-sized East African basin Type Journal Article
  Year 2018 Publication Journal of Hydrology: Regional Studies Abbreviated Journal  
  Volume 19 Issue Pages 349-364  
  Keywords LPJmL, Global hydrological model, Regionalization, Rufiji, Irrigation abstractions, Water resources  
  Abstract Study region The Rufiji basin, East Africa. Study focus Rapid advances in global hydrological model (GHM) resolution, model features, and in situ and remotely sensed datasets are driving progress towards local relevance and application. Despite their increasing use, however, evaluation of local hydrological performance of GHMs is rare. In this paper, we examine the performance of a well-known GHM (LPJmL, recently modified to  9 km resolution) with and without modest steps to regionalise the model. We consider the Rufiji river basin, an economically important medium-size basin in eastern Africa. New hydrological insights for the region Our results indicate that the unmodified GHM does provide a reasonable first approximation of spatial variability in mean flow conditions, but scores rather poorly on seasonal and inter-annual variability. For the model to achieve levels of performance indicators comparable with bespoke modelling, modifications to model inputs, additional runoff delay and wetland parameterization were required. The largest improvements are associated with adjustments in precipitation and enhanced runoff delay. With the modified version, as a proof of concept, we show that a well-known drying trend in a major tributary of the Rufiji can be explained by implementing irrigation abstractions in the model. Overall, the results suggest that with limited and fairly simple modification GHMs can be regionalised to allow their use for scenario testing and further exploration of key local processes in basins with limited observational data.  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2214-5818 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number FHL @ info @ Siderius2018349 Serial 1307  
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