ABSTRACT
This article points out the main Guarani Aquifer Project results, related to knowledge development, groundwater management instruments, and institutional arrangements, to keep the cooperation process among countries. A new level of knowledge on the aquifer geometry and functioning permits a common comprehension of main problems and focus on the local management necessities. All products and achievements were developed with strong participation of the four involved countries, supported by all governmental levels and civil society organizations. The project’s institutional arrangement is a seed of the next phase co-operation process between countries, with the implementation of the approved Strategic Action Programme (SAP).
