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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/724

Title: Continuous daily hydrograph simulation using duration curves of a precipitation index
Authors: Smakhtin, VY
Masse, B
Keywords: Ungauged sites
Precipitation index
Spantial interpolation
Observed records
Issue Date: Apr-2000
Publisher: John Wiley & Sons Inc
Citation: Smakhtin, VY and Masse, B. 2000. Continuous daily hydrograph simulation using duration curves of a precipitation index. Hydrological Processes, vol 14(6), pp 1083-1100
Abstract: The paper describes a parsimonious approach for generating continuous daily stream-flow time-series from observed daily rainfall data in a catchment. The key characteristic in the method is a duration curve. It is used to convert the daily rainfall information from source rain gauges into a continuous daily hydrograph at the destination river site. For each source rain gauge a time-series of rainfall related `current precipitation index' is generated and its duration curve is established. The current precipitation index reflects the current catchment wetness and is defined as a continuous function of precipitation, which accumulates on rainy days and exponentially decays during the periods of no rainfall. The process of rainfall-to-runoff conversion is based on the assumption that daily current precipitation index values at rainfall site(s) in a catchment and the destination site’s daily flows correspond to similar probabilities on their respective duration curves. The method is tested in several small catchments in South Africa. The method is designed primarily for application at ungauged sites in data-poor regions where the use of more complex and information consuming techniques of data generation may not be justified.
Description: Copyright: 2000 John Wiley & Sons Ltd
URI: http://hdl.handle.net/10204/724
ISSN: 0885-6087
Appears in Collections:Environmental management
Water resources and human health
General science, engineering & technology

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