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Influence of the different precipitation interpolation methods on Jadar river discharge

TitleInfluence of the different precipitation interpolation methods on Jadar river discharge
Publication TypeConference Paper
Year of Publication2014
AuthorsIvković M, Kržič A, Weerts A
Conference NameDailyMeteo.org/2014
Date Published06/2014
PublisherFaculty of Civil Engineering, University of Belgrade
Conference LocationBelgrade
Abstract

The frequent occurrence of heavy rainfall in Serbia during June and October causes flash floods in many areas resulting withsignificant economic losses. Consequently, themost partof the annual local community budget is diverted to the reconstruction of the disasters caused by floods every year. In RHMSS, through the DRIHM project, aHBV model, distributed hydrologic model is in the process of assessment as a tool for early warning of the flash floods. This model is a part of the OpenStreams, anopen source distributed hydrologic modeling environment. Here we use OpenStreams HBV-96 setup embedded in OpenDA and based on the open source python-pcraster library.Dynamic input data for the model are gridded time series of the observed precipitation, mean temperatures and potential evaporation. Representation of the catchment characteristics is given through the digital elevation map, land cover as well as soil map and the river network is calculated from the topography map.Precipitationwell-distributed in time and space is vital part of the input data preparation, especially when there are not sufficiently long time series of measured precipitation data available. In this study we are examining sensibility of the HBV model to different interpolation methods for precipitation distribution on Jadar river basin. The basin is selected on the basis of its position and exposure to southwestern circulation bringing convective cloudiness and significant precipitation amounts. Several interpolation methods were chosen from Python extension NumPy. For every method gridded precipitations were used as input to HBV, and time series of discharge are produced. Given the fact that hourly precipitation data are available from only two main meteorological stations, the verification of the interpolated precipitation is done by comparison with daily accumulated amounts from precipitation stations.The dissimilarities are also presented through the difference between measured and simulated discharge.

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