Efficient and accurate leakage detection and localization technology for water distribution networks is a research hotspot in recent years.The technology involves the optimal layout of conventional pressure and flow sensors

as well as the leakage localization method of water distribution network based on this layout.In this paper

the sensitivity matrix-based Gram-Schmidt orthogonalization(SMGSO)method is studied to optimize the layout of pressure sensors.Then

the localization precision of two localization methods including dictionary learning and model-based is studied and compared.The results show that the modelbased localization method has higher localization precision.Taking the water distribution network in a district of Taiyuan as an example

the results show that the proposed optimal sensor layout can improve the localization precision by up to 12.5%.The new localization method can improve the localization precision by 2.5% compared with the interior point method.