5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Natural hazard and territorial planning: Using digital topographic data Using digital topographic data to capture the flood footprint to capture the flood footprint Fernando Nardi University for Foreigners of Perugia Geodisaster S Geodisaster S es es s s ion @ 2014 Geos ion @ 2014 Geos patial World F patial World F orum orum Geneve , Switzerland - May 9 th , 2014 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Outlines • Earth landforms and physical processes • Digital global earth data • GIS terrain analysis for capturing the flood footprint: introducing a DEM -based floodplain delineation model model • Flood risk and territorial planning: Standard flood maps vs floodplains Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 1
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Earth landforms and physical processes Earth physical processes modelling issues: • • Scenarios/Frequency Scenarios/Frequency • Data accuracy • Statistics/Deterministic • Validation • … UNCERTAINTY UNCERTAINTY http://www.agci.org/classroom/images/earth_system_diagram_big.jpg Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Earth landforms and physical processes Weathering Erosion Erosion Deposition Landslide Fluvial processes LANDSCAPE EVOLUTION Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 2
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Digital Elevation Models http://www2.jpl.nasa.gov/srtm/ Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Digital Earth Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 3
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy High resolution DEMs Aerial and satellite remote sensing (LIDAR, UAV - SRTM, ASTER) Field surveys (GPS, Laser scanner, UAV) Sensing the Earth Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Observing and interpreting urban and urban and natural features … Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 4
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy …and processes Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Floodplains Rio Salado floodplain, USA Floodplains are critical landscape Floodplains are critical landscape features that are highly distinguished from neighboring uplands in terms of their hydrologic, geomorphologic, biogeochemical and ecological processes Tiber floodplain, Italy Nardi , F., E. R. Vivoni , and S . Grimaldi (2006), Investigating a floodplain scaling relation using a hydrogeomorphic delineation Parana floodplain, Brazil method, Water Resources Research , 42 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 5
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Water - driven erosion and deposition Floodplains processes shape river valleys Floodplain topography intrinsically contains information intrinsically contains information on the hydrogeomorphic signature of past erosional and depositional processes. DEM implicitly contains the Digital Elevation Models (DEMs) floodplain information contains significant information on the floodplain - related on the floodplain - related physical phenomena Nardi , F., E. R. Vivoni , and S . Grimaldi (2006), Investigating a floodplain scaling relation using a hydrogeomorphic delineation method, Water Resources Research, 42 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Terrain Analysis Analyzing terrain surface properties (elevation, land use,..) for deriving hydrogeomorpic use,..) for deriving hydrogeomorpic parameters : Direct: slope, curvature, aspect Indirect: flow direction, drainage area Features : stream network, drainage basin, floodplain, hillslope stream network, drainage basin, floodplain, hillslope Processes : deposition, erosion, land/water dynamics (i.e. landsliding /flooding) Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 6
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Terrain analysis applications Water flows along Water flows along the s teepest slope Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Terrain analysis applications Filling sinks Flow direction Flow direction Hydrologic processing of DEMs for Contributing area Watershed stream network extraction delineation Stream Network Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 7
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Hydrogeomorphic floodplain delineation Inundation depth: h Inundation depth: h Contributing area: A Leopold law scaling parameters: a, b Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Hydrogeomorphic floodplain delineation Water energy of cell flow that goes downhill h = 7m h = 7m Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 8
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Po river basin (North Italy) Area 75,000 km 2 Channel flow depths : up to 44 m Stream network source contrib . area: 500 km 2 contrib . area: 500 km 2 Floodplain area: 5178 km 2 to 14976 km 2 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Po river basin (North Italy) 500 yrs Flood / Inundation maps - > 10,300 km 2 Lake areas : 1000 km 2 Lake areas : 1000 km Floodplain area: 5178 km 2 to 14976 km 2 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 9
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Tiber river basin (Central Italy) Area 17,500 km 2 Channel flow depths : up to 25 m Stream network source Stream network source contrib . area: 500 km 2 Floodplain area: 760 km 2 to 1455 km 2 200 yrs flood maps : 436 km 2 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy The Tiber river case study How do the hydrogeomorphic hydrogeomorphic floodplain behaves as respect to standard flood/inundation maps? maps? Nardi F ., Biscarini C ., Di Francesco S ., Manciola P ., Ubertini L., Irrigation and Drainage , 2013 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 10
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy The Tiber river case study Nardi F., Biscarini C ., Di F rancesco S ., Manciola P., Ubertini L., Irrigation and Drainage , 2013 Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Tiber river basin (Central Italy) City of Rome City of Rome Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 11
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Tiber river basin Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Tiber river basin Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 12
5/15/2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Tiber river basin Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 Unesco Chair “Water Resources Management and Culture” Fernando Nardi, University for Foreigners of Perugia, Italy Tiber river basin Hydrologic - Hydraulic flood maps HYDROGEOMORPHIC FLOODPLAIN HYDROGEOMORPHIC FLOODPLAIN Geospatial World Forum Geneva, Switzerland – May 5-9, 2014 13
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