In all parts of the world wetlands are endangered by human activities and development. They have been studied by many disciplines, both in the natural and the social sciences. Integration between these discplines has been attempted, though often without much success. This book approaches the study of wetlands management and development policy by using integrated ecosystem modelling that builds upon insights from hydrology, ecology and economics. The authors devote particular attention to the spatial dimension, the development of a set of complementary indicators, and the aggregation and evaluation of information.