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… have therefore been lost in one century, primarily through drainage for agriculture and urban development and water … for conversion to alternative land use. By 1985, the drainage of available wetlands for intensive agriculture was … different activities can generate the same process. Drainage and excessive groundwater abstraction can both …

… water as well as comparable numbers concerned with land drainage, river improvement and inland navigation. In other … trend for water management to be undertaken on a drainage basin approach. South Africa with its statutory … Best known historically for operating irrigation and drainage systems, recent years have seen a significant …