![]() You should define the pipe node spacing while considering the courant number requirements. Coarser spacing does not include the variability in the real water surface profile. Increasing resolution can improve the representation of a water surface profile. This applies when you model:įor 1D models, resolution is the cross-sectional or pipe node spacing. You need to decide on an appropriate model resolution before you specify the topographic survey requirements. You should not use existing hydraulic models without collecting more survey data. ![]() You would usually include this with a topographic survey. River channels and pipe networks are typically modelled in one dimension ( 1D) and need cross-sectional and network data. It can be natural or include canalised reaches or bypass channels. Modelling river channelsĪ river channel is the topography a river flows through in normal conditions. In an urban drainage model this is the pipe network and any surface flow paths activated when the pipe network surcharges. In the source, pathway, receptor ( SPR) approach, the pathway component is the route water takes from the source to the receptors.įor a fluvial model this is a river channel and associated structures, bypassing channels and floodplains. The information is not software specific, so you should also read the manual for the software you choose. This guide is an overview of how you should represent main pathway features. ![]() Read all the documents to make sure you have the information you need to start your modelling project. There are 4 more documents that cover this topic. This document is part of the flood modelling standards for river systems.
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