swamp filled via local run-off during winter and spring then dried out over summer due to evaporation and infiltration. Management of the wetland is targeted at supporting the annual wet/dry sequence (except for areas of permanent inundation associated with the discharge of treated sewage effluent from Leeton sewage treatment plant). A volume of 500 megalitres is required to inundate the swamp (approximately 60 per cent of the swamp is inundated by 500 megalitres), with the last managed event occurring in early 2010. Fivebough Swamp has four management zones (which are contiguous) (Fivebough & Tuckerbil WMT 2002): Zone 1 (eastern portion)—covers approximately 60 per cent of the swamp and requires inundation to a depth of 45 centimetres in eight out of 10 years (Biosis Research & WI-O 2006) Zone 2 (western portion)—requires shallow water (i.e. 3 centimetres) inundation in nine out of 10 years (Biosis Research & WI-O 2006). A portion of Zone 2 is continually wet from irrigation of treated sewage effluent Zone 3 (entrance area)—predominantly dry zone that does not have ecological water requirements Zone 4 (north-western portion)—is an ephemeral wetland favoured by larger wading birds. The water management objective is to support temporary wetlands, but the volumes of water required to achieve this are not known. Water enters this area via an escape during high rainfall events or via Zone 1 when water levels are sufficiently high in winter and spring. Current management of Fivebough Swamp opens the southern regulatory structure on the contour drain from June until November to allow natural rainfall run-off to enter the wetland. The Fivebough and Tuckerbil Swamps Management Plan notes that the length of time varies depending on the season. Artificial watering of the swamp has been undertaken using water supplied from the Murrumbidgee River through the MI supply channels. The optimum time for this to be undertaken from a delivery aspect is between July to October. This is the low-regulated season and is after the annual maintenance period in the MIA channels. Water for managed events would be supplied via Murrumbidgee supply channels, which Irrigation’s requires liaison with MI. Tuckerbil Swamp Tuckerbil Swamp is a natural inland drainage depression covering 289 hectares. The objective for the management of Tuckerbil Swamp is to maintain and protect habitats for
swamp filled via local run-off during winter and spring then dried out over summer due to evaporation and infiltration. Management of the wetland is targeted at supporting the annual wet/dry sequence (except for areas of permanent inundation associated with the discharge of treated sewage effluent from Leeton sewage treatment plant). A volume of 500 megalitres is required to inundate the swamp (approximately 60 per cent of the swamp is inundated by 500 megalitres), with the last managed event occurring in early 2010. Fivebough Swamp has four management zones (which are contiguous) (Fivebough & Tuckerbil WMT 2002): Zone 1 (eastern portion)—covers approximately 60 per cent of the swamp and requires inundation to a depth of 45 centimetres in eight out of 10 years (Biosis Research & WI-O 2006) Zone 2 (western portion)—requires shallow water (i.e. 3 centimetres) inundation in nine out of 10 years (Biosis Research & WI-O 2006). A portion of Zone 2 is continually wet from irrigation of treated sewage effluent Zone 3 (entrance area)—predominantly dry zone that does not have ecological water requirements Zone 4 (north-western portion)—is an ephemeral wetland favoured by larger wading birds. The water management objective is to support temporary wetlands, but the volumes of water required to achieve this are not known. Water enters this area via an escape during high rainfall events or via Zone 1 when water levels are sufficiently high in winter and spring. Current management of Fivebough Swamp opens the southern regulatory structure on the contour drain from June until November to allow natural rainfall run-off to enter the wetland. The Fivebough and Tuckerbil Swamps Management Plan notes that the length of time varies depending on the season. Artificial watering of the swamp has been undertaken using water supplied from the Murrumbidgee River through the MI supply channels. The optimum time for this to be undertaken from a delivery aspect is between July to October. This is the low-regulated season and is after the annual maintenance period in the MIA channels. Water for managed events would be supplied via Murrumbidgee Irrigation’s supply channels, which requires liaison with MI. Tuckerbil Swamp Tuckerbil Swamp is a natural inland drainage depression covering 289 hectares. The objective for the management of Tuckerbil Swamp is to maintain and protect habitats for
ewater-delivery-murrumbidgee-valley.docx