Abstract
This paper describes a series of applications developed in a GIS environment to improve the analytical capacity of waterworks and surveying. uDig (an open source GIS) has been used as GIS for its flexibility and the ability to operate on multiple operative systems, being developed in Java. In order to bring the world of GIS to water resources, solvers have been developed an OMS compliant wrapper in JGrassTools, that natively calls the EPANET libraries modifying it to solve problems of fluctuations in tanks. To facilitate the relief activities an application (Geopaparazzi) has been developed for Android that interfaces with uDig. The original EPANET solver has been improved in order to overcome the problem of spurious tank oscillations sometimes reported by different end-users. Two different practical applications are presented: the first is within the EU project No 9 ACP RPR 50 - 21, in the district of Byumba, northern Rwanda and the second in Italy in the district of Ravina, city of Trento.