A caution about the multilinear discrete lag-cascade model for flood routing

Calculation of dam risk probability of cascade reservoirs considering risk transmission and superposition

“…In the cascade reservoir system, the dam-break flood enters the river channel and flows to the downstream reservoir after the upstream dam breaks. The flood routing model aims to deduce and describe the change process of hydraulic factors in the river channel over time, such as the discharge and water level of the flood, in order to obtain the inflow flood characteristics of the downstream reservoir (Perumal et al, 2007). According to the hydraulic theory, the natural river channel is often regarded as one-dimensional flow and the description of river flow is mainly based on the Saint Venant equations (Goutal and Sainte-Marie, 2011;Liu et al, 2015).…”

Hydraulic flood routing in an ephemeral channel: Wadi Mekerra, Algeria

“…Moreover, flood inundation models play a central role in the evaluation, selection and in some cases the implementation of these measures (Ernst et al 2010;Merz et al 2010;Schubert and Sanders 2012). Flood routing is an important component of floodplain management studies which is recognized as a procedure required in order to determine the hydrograph at one point on a stream from the known hydrograph at an upstream point (Chow 1959;McKay et al 1996;Perumal et al 2007). The need to model flood behavior adequately arises from (a) knowing the timing and the magnitude of expected flooding early enough to facilitate safe evacuation of people and livestock (b) assessing the environmental impacts of river regulation (Wilson 1990) and dam failure (Blackburn and Hicks 2002) (c) designing flood prevention systems like spillways, culverts and diversion canals (Viessman et al 1989;Smithers and Caldecott 1995).…”

Improving kinematic wave routing scheme in Community Land Model

“…Runoff routing using a unit hydrograph (UH), a simple approach that treats each modeling element as a linear system (Perumal et al 2007), has been used in catchment hydrology and in land surface modeling to simulate streamfiow discharge Lohmann et al 2004). Routing methods based on the concept of multi-linear reservoirs are often used in large scale land surface modeling (Camacho & Lees 1999;Zhang et al 2002;Du et al 2003), and the literature has shown that this approach can produce roufing simulations comparable to that of the full de Saint Venant equation (Perumal 1994;Camacho & Lees 1999).…”