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Impervious Land Cover Pattern and Its Impact on Urban Water Logging: Case of New Delhi, India

Water logging is one of the most common urban issue in rapidly growing metropolitan cities. The rapid growth led to increase in impervious surfaces in urban landscape. Urban Impervious surfaces like roads and buildings pavements have high runoff coefficients and less porosity that become the prime cause of waterlogging during heavy precipitation. The objective of this study is to understand the relation between waterlogging and impervious surface pattern at ward level of a metropolitan city. For the study, pattern of the impervious surface, prepared from satellite image, is quantified with the help of landscape metrics like percentage of landscape and patch cohesion index. The correlation between impervious surface and location of waterlogged areas reveals how spatial configuration of impervious surfaces like built form, can be optimised to mitigate the urban waterlogging for future development.