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Introduced Non-native Waterbirds - Status within the African-Eurasian Flyways

… is most likely due to the network of man-made canals and drainage ditches that create a highly favourable environment …
20 Jun 2026 Document

Ramsar Technical Report 7: Ramsar Wetland Disease Manual

… 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 …
20 Jun 2026 Document

Handbook 4: Avian influenza and wetlands

… attention should be paid to spillage along access routes, drainage off fields into the wetlands, and use of fertilized …
20 Jun 2026 Document