GIS METHODOLOGY FOR HYDROLOGICAL ANALYSIS AND SEWER NETWORK DESIGN

摘要

Hydrologists and engineers are facing the difficulty to define and evaluate the runoff especially in urban areas. In this environment, the evaluation is particularly sensitive and important because it will be used for the design of the sewer network according to a risk and economic analysis. Several tools on GIS environment allow to determine hydrological parameters of catchments and sub-catchments from DEM and land uses by simple aerial colour photographs. Data results can be employed with an engineering methodology to simulate hydrological processes in urban catchments and sewer network hydraulics. An example of this methodology is applied in Antibes municipality in distributed approach of geomorphologic and land use properties.