Experience demonstrates that none of the available measures regarding biological effects of pollution can be considered ideal, which is due to the complexity in

John Wesley Powell, U.S. scientist and geographer, put it best when he said that a watershed is: ...that area of land, a bounded hydrologic system, within which

Ecological indicators address ecosystems structure and/or function and are commonly used to provide synoptic information about their state. Through quantitative

This guidebook, now thoroughly updated and revised in its second edition, gives comprehensive advice on the designing and setting up of monitoring programmes fo