® Hosted and Sponsored by ESA/ESRIN Experiments in CityGML-Based Surface and Groundwater Modelling – Can the Hydrology DWG Help? 86th OGC Technical Committee.

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® Hosted and Sponsored by ESA/ESRIN Experiments in CityGML-Based Surface and Groundwater Modelling – Can the Hydrology DWG Help? 86th OGC Technical Committee Frascati, Italy Steve Smyth – Co-chair CityGML SWG - 23rd September 2013 Copyright © 2013 Open Geospatial Consortium

OGC ® CityGML CityGML 2.0 is both a conceptual model and an encoding standard for representations of the built environment. A site is a group of related structures, infrastructure, and the land and water upon or inside of which the structures and infrastructure are located. The CityGML core and extensions can represent all of the important features of a site –Land surface –Water features –Subsurface geology –Pipes, cables, and other infrastructure –Tunnels, bridges, roads, paths, trees, furniture –Buildings and other built structures Copyright © 2013 Open Geospatial Consortium

OGC ® Example: The Stopera – A Site Copyright © 2013 Open Geospatial Consortium

OGC ® Site Simulations Site simulations are an important CityGML application area –Sound, Solar potential, Heating, Heat Loss, Fire, Blast Effects –Fluid flow Precipitation/runoff Pipe breaks Dam and tank breaks Surface –Waves, including tsunamis –Channeled flow –Storage –Runoff –Infiltration Subsurface We are beginning experiments to apply Smoothed Particle Hydrodynamics (SPH) to sites Copyright © 2013 Open Geospatial Consortium

OGC ® Hydrology DWG The Hydrology DWG appears to have support for input variables that could drive flow simulations –Streamflow measurements Stage Discharge Velocity Relationships between the above –Precipitation measurements –Groundwater and Subsurface Geology Top of saturated zone Well-bore lithology Copyright © 2013 Open Geospatial Consortium

OGC ® Connection with Hydrology DWG? Things we are looking for –Historical and real-time inputs for surface and groundwater simulations –Data to support validation of simulation algorithms –Changes/additions to CityGML can do to connect better to hydrological information. Can the Hydrology DWG help? Copyright © 2013 Open Geospatial Consortium