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… is most likely due to the network of man-made canals and drainage ditches that create a highly favourable environment …

… most threatened ecosystems, owing mainly to ongoing drainage, conversion, pollution and over- exploitation of … these impacts have obvious and immediate effects, such as drainage and conversion. However, some effects, such as those … 2012]. Fritsch, M. S. (1997). Health issues related to drainage water management, Chapter 7. In: Management of …

… system modific ations (owing to, e.g., dams, wetland drainage, modi- fication of tidal regimes); infrastructure … system modifications (owing to, e.g., dams, wetland drainage, modification of tidal regimes), residential and … of factors such as overgrazing, burning, woodcutting, drainage of wetlands and pesticide use which reduce the …

… was environmental modification through deforestation, drainage of wetlands, or more recently, intensive … decades and to the progressive loss of habitat caused by drainage of the marshlands for cattle production. On the …

… behind this habitat  loss were drainage to  …

… attention should be paid to spillage along access routes, drainage off fields into the wetlands, and use of fertilized …