Comparison of blue-green solutions for urban flood mitigation: A multi-city large-scale analysis
Fig 2
Geographical location of the 9 selected case studies.
(a) Location of the 9 cities on a world map. (L1-L9) Boundaries of the study cases with investigated rooftops. Flat roofs are highlighted in green, while sloped roofs are represented in blue. Cities are ordered based on their geographic location from west to east. Maps have been developed with the help of QGIS 3.4 [37], using layers downloaded from the different geoportals listed in the S1 Table and satellite images derived from the Landsat website (http://landsat.visibleearth.nasa.gov/).