Keywords
suburban, liquid, distributed hydrological modelling, sewer system, ditches
Start Date
1-7-2010 12:00 AM
Abstract
The world-wide trend towards a growing urbanization mainly affects suburbanareas. These areas are subject to rapid modifications such as an increase of imperviousareas, concentration of runoff in sewer systems, river regulations, but also a decline ofagricultural areas causing a forest increase. These changes have an impact on the localhydrology and can induce floods, pollution or decrease of groundwater resource.Distributed hydrological models are useful tools for water management in these areas. Theycan simulate floods or the impact of land use scenarios on the water balance. This paperpresents the PUMMA model (Peri-Urban Model for landscape MAnagement), dedicated tothe hydrology of suburban catchments. The model is built within the LIQUID® modellingframework. LIQUID® facilitates the development of PUMMA by providing a set ofmodules for different hydrological processes, templates for easy development of newmodules and module coupling mechanisms. PUMMA follows an object-oriented approach.The landscape is discretized into cadastral units in urban areas and irregular hydrolandscapes,resulting from intersection of land use, geology, soil and sub-basin maps inrural areas. Each model unit represents one implementation of a module. The consideredhydrological processes are infiltration in natural soils and hedgerows; overland flow inurban zones and over roads, storage in storm water retention basins and flow routing withinnetworks consisting of ditches, natural rivers and sewer pipes. Several drainage networkscan coexist and interact, which allows the modelling of complex suburban drainage systems.The paper presents the model structure and a first application to a simple test case.
Development of a suburban catchment model within the LIQUID framework
The world-wide trend towards a growing urbanization mainly affects suburbanareas. These areas are subject to rapid modifications such as an increase of imperviousareas, concentration of runoff in sewer systems, river regulations, but also a decline ofagricultural areas causing a forest increase. These changes have an impact on the localhydrology and can induce floods, pollution or decrease of groundwater resource.Distributed hydrological models are useful tools for water management in these areas. Theycan simulate floods or the impact of land use scenarios on the water balance. This paperpresents the PUMMA model (Peri-Urban Model for landscape MAnagement), dedicated tothe hydrology of suburban catchments. The model is built within the LIQUID® modellingframework. LIQUID® facilitates the development of PUMMA by providing a set ofmodules for different hydrological processes, templates for easy development of newmodules and module coupling mechanisms. PUMMA follows an object-oriented approach.The landscape is discretized into cadastral units in urban areas and irregular hydrolandscapes,resulting from intersection of land use, geology, soil and sub-basin maps inrural areas. Each model unit represents one implementation of a module. The consideredhydrological processes are infiltration in natural soils and hedgerows; overland flow inurban zones and over roads, storage in storm water retention basins and flow routing withinnetworks consisting of ditches, natural rivers and sewer pipes. Several drainage networkscan coexist and interact, which allows the modelling of complex suburban drainage systems.The paper presents the model structure and a first application to a simple test case.
