A New Method to Estimate the Leakage Amount at the Water Supply Network Nodes in the Countryside Regions

In order to investigate the leakage amount in the water supply networks in the countryside regions, a new method combined with GIS and DEM to estimate the leakage amount at water supply network nodes has been put forward. It is proposed according to the Chinese node leakage model, and it takes advantage of the strong spatial annalistic function of the GIS. The emphasis is put on the study of the topology relationship of the water supply networks which are built based on the GIS network analysis. And DEM model is used to calculate the elevation at the network nodes. And then the leakage amount of the water supply network nodes is estimated. Finally, specific examples have been verified in order to illustrate that the GIS-based method to estimate leakage amount at the water supply network nodes is efficient.