the albufera natural park, a wetland of international importance in the valencia region, threatened by water pollution and unsusta

2000 agriculture agroecosystem albufera and area balance basin biodiversity birds catalan coastal conservation convention cultivation culture development directive ecological ecosystems environmental erosion european goals hydrographic hydrological hydrology infrastructure intrusion mediterranean modelling natura natural nature oryza paddies park pollution protected quality ramsar region reserve resources rice risk saltwater sativa sewage site speaking sustainable thresholds traditional union unsustainable valencia valència water wetland wetlands