Flood Forecasts for Urban Basin with Integrated Hydro‐Meteorological Model

Comment on "A praxis-oriented perspective of streamflow inference from stage observations – the method of Dottori et al. (2009) and the alternative of the Jones Formula, with the kinematic wave celerity computed on the looped rating curve" by Koussis (2009)

“…It thus follows that the novel idea of DMT of using stage observations at two cross-sections to estimate flood flows and the BGS procedure of flood depth estimation from known flows are inversions of each other; indeed, both methods treat the flow as quasi-steady over the time interval for which the calculations are carried out. This standard procedure of BGS (Darmstadt, Germany) was adopted in the modelling of flood flows in the heavily modified Kiphissos (Kephisos) River, in Athens, Attica Region, Greece (Koussis et al, 2003;Mazi and Koussis, 2006).…”

Reply to Comment on "A dynamic rating curve approach to indirect discharge measurement by Dottori et al. (2009)" by Koussis (2009)

“…DyRaC is nothing else that a reverse application of the standard-step method, an old procedure used by BGS (Darmstadt, Germany) to model flood flows in the River/Canal Kiphissos, in Athens, Attica Region, Greece (Koussis et al, 2003;Mazi and Koussis, 2006).…”

“…This standard procedure of BGS (Darmstadt, Germany) was adopted in the modelling of flood flows in the heavily modified Kiphissos (Kephisos) River, in Athens, Attica Region, Greece (Koussis et al, 2003;Mazi and Koussis, 2006)." First of all Koussis seems to disregard the fact that two equations relevant to DyRaC were presented in DTM.…”

“…The standard-step method was introduced by Chow (1959) as an alternative to the direct step method for drawing backwater profiles in a river, and successively also described by Henderson (1966), who termed it "step method." The standard step method was then widely used by one of the DMT authors to derive the PAB approach (Todini and Bossi, 1986) several years before the claimed standard BSG procedure applied to the Kiphissos (Kephisos) River, in Athens, Attica Region, Greece (Koussis et al, 2003;Mazi and Koussis, 2006). But the point is not this one.…”

“…In a recent comment, Koussis (2010) moved a number of critiques on the paper by Dottori et al (2009), which describes a methodology for indirect discharge measurement using simultaneous water stage measurements at two adjacent cross sections in a river reach. The procedure, which requires the geometrical description of the two cross sections, allows for direct computation of water surface slope, and improves accounting for unsteady flow effects through the use of the complete or simplified momentum equation (a reason for calling it DyRaC, the acronym of Dynamic Rating Curve).…”