Streamflow modelling on a subdaily time step in the upper Murray basin

This paper describes the results of rainfall-runoff modelling for ten catch ments in the Upper Murray Basin (Basin 401) of the Murray Darling drainage division (MDDD), Australia. The outflows of these catchments are used by th e Murray Darling Basin Commission for operational management of the Hume an d Dartmouth Lakes, two of Australia's four largest reservoirs. Previous res ults [1-4] have demonstrated that the conceptual, lumped parameter, rainfal l-runoff model IHACRES provides a good approximation to the daily measured flow in several basins of the MDDD. The major aim of the research described in this paper is the identification of models based on a shorter four-hour ly sampling interval. Further in [5], these identified models are used in a Kalman filter-based forecasting framework to allow real-time forecasts of streamflow in these catchments. (C) 2001 Elsevier Science Ltd. All rights r eserved.