A Rainfall-Runoff Model for Daily Flow Synthesis

Mimikou, M; Rao, AR

dc.contributor.author	Mimikou, M	en
dc.contributor.author	Rao, AR	en
dc.date.accessioned	2014-03-01T01:38:24Z
dc.date.available	2014-03-01T01:38:24Z
dc.date.issued	1982	en
dc.identifier.issn	01675648	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/22124
dc.title	A Rainfall-Runoff Model for Daily Flow Synthesis	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0167-5648(08)70718-4	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0167-5648(08)70718-4	en
heal.publicationDate	1982	en
heal.abstract	Abstract: A dynamic stochastic model for synthesis of daily flows and flood hydrographs at a certain site in a river reach is presented in this paper. The inputs to the model are the inflows at an upstream point of the reach and the rainfall on the basin between the upstream and downstream points. The model consists of three parts: an inflow-outflow transfer function model, a Kalman filter for the lateral flow contribution of the drainage basin and a second order autoregressive model for the noise component. The model for the lateral flow contribution to the outflow was necessary to correct the outflows given by the inflow-outflow transfer function of the system and it enables proper accounting of the lateral flow into the reach. The model is tested by using observed data. Daily flows and flood hydrographs at the downstream location simulated by using the model have been shown to agree with the historic data with remarkable accuracy. Besides, the synthesized data preserve the historical mean, skewness, kurtosis, lag-one autocorrelation and inflow-outflow cross-correlation coefficients at the 90% confidence level and the variance at the 95% confidence level. The model is found to be very efficient in extending daily flow records, estimating missing daily data and flow hydrographs, and for simulating daily reservoir inflows in real time, etc. The model is especially useful for synthesizing flows from basins of irregular hydrological characteristics and for which only limited data are available. © 1982.	en
heal.journalName	Developments in Water Science	en
dc.identifier.doi	10.1016/S0167-5648(08)70718-4	en
dc.identifier.volume	17	en
dc.identifier.issue	C	en
dc.identifier.spage	297	en
dc.identifier.epage	314	en