Measuring extent, location, and change of imperviousness in urban domestic gardens in collective housing projects

作者：Verbeeck Klaartje^*; Van Orshoven Jos; Hermy Martin

来源：Landscape and Urban Planning, 2011, 100(1-2): 57-66.

DOI：10.1016/j.landurbplan.2010.09.007

• Urban ecology
• Domestic gardens
• GIS
• Land-cover transition
• Spatial simulation
• Transition probability

Limited information is available on the extent, distribution and change of impervious surfaces in urban areas, despite their impact on the urban hydrological cycle and their role in urban flooding. This paper examines the extent and location of impervious elements in urban domestic gardens in 5 collective housing projects and its change between the building year and 2008 by means of building plans, orthophotos and field survey. Focus was on the individual, one family parcels, all including a portion of private garden area. Transition probabilities were calculated and used for descriptive analysis regarding the extent and location of impervious elements and for correlation analysis between impervious area and parcel variables. To explain change to imperviousness on pixel scale, a logistic regression model was created based on location and parcel characteristics. An average increase in imperviousness from 38% to 56% on neighborhood scale was found, leading to an increase of impervious area by 1.3 m(2) per year per parcel. Based on analysis of distance to the street and distance to the house, transition probabilities to impervious area are highest close to the house. When focused on terraces and driveways specifically, we can distinguish differences in location. Parcel characteristics as age, size of the parcel and width of the parcel were significantly correlated with transition probabilities to impervious surface (total) and impervious elements in particular. Three logistic regression models were created, of which the best one yielded an overall accuracy of 77.0%.

• 出版日期2011-3-30