Introducing of hydraulic modelling, what is it used for (applications), gov agencies, planning, development
Hydraulics is the science or study of conveyance of liquids through channels, pipes, structures, etc. Hydraulic modelling refers to modelling of fluid movement to study flow behaviour. There are two ways to model hydraulics - physically and numerically. While physical models are scaled down models of the real-world prototype, numerical models use scientifically derived equations to represent the different flow variables, such as velocity, pressure head, etc. This is done via balancing the mass and momentum of the flowing liquid in equations. Solvers are programmes that help to solve the hydraulic equations, and extract humanly understandable outputs.
Hydraulic modelling can used by government agencies, planning and development authorities, scientists and researchers for various purposes starting with design of hydraulic structures such as bridges, culverts, dams, reservoirs, urban drainage and water supply systems, weirs, tidal gates, flood protection schemes, weather and flood forecasting systems, etc.
Used physical data collected through surveys
Flood models are a class of hydraulic models that are specifically purposed to do flooding related studies. Flood modelling might require a wide range of data, depending on what type and details of outputs are expected from the modelling exercise. Most of the data used in these models is collected through surveys. These may range from river cross-sections to flood plain levels, location and levels of structures (obstacles) such as culverts to location of buildings and, land cover types such as green cover or asphalt (to understand surface roughness), historical flooding levels and extents, annual maximums of flow in watercourses, etc.
Different types of hydraulic modelling
For simplification, flood Modelling is divided into four components - Rivers, Urban Networks, Floodplain and Hydrology. These four components can be used singly or in combination, as per the project requirements. You may find in detail about the individual types and their integration in the links provided below
Dynamically link to an integrated system, allowing interaction between systems
Check webinars, intro to 1D training (first few slides from Session 1)