Threat Effect on asset Knowledge gap Information required Spells may exceed Increase in no flow waterhole persistence Waterhole persistence Distribution of refugial spell occurrence and time, causing local times in target river waterholes across the duration extinction of aquatic valleys northern Basin biota Relationship between spell length and Blank cell Blank cell Blank cell amount of waterhole habitat at the reach scale Blank cell Blank cell Blank cell Water loss rate Waterhole shape and Blank cell Blank cell Blank cell size Connection to Blank cell Blank cell Blank cell groundwater Depth/Persistence Blank cell Blank cell Blank cell relationship Sediment accumulation in Change in the Sediment status of Amount of soft waterholes, leading to provision of sediment waterholes sediment in waterholes reduced volume and scouring flow events persistence Historical rate of Blank cell Blank cell Blank cell sediment accumulation Identification of flow Effect of flows on events or other Blank cell Blank cell sediment dynamics conditions that lead to sediment infilling Identification and quantification of Blank cell Blank cell Blank cell scouring capacity of flows Project purpose This project addresses crucial knowledge gaps (Table 1.1) required to understand if the current EWRs set at the Lower Balonne Floodplain are suitable for maintenance of refugial waterholes, and determines if additional flow indicators are needed. Waterholes in the Barwon–Darling upstream of Menindee Lakes were also investigated, to understand whether particular flow requirements should be specified for this part of the northern Basin.
Threat Effect on asset Knowledge gap Information required Increase in no flow spell occurrence and duration Spells may exceed waterhole persistence time, causing local extinction of aquatic biota Waterhole persistence times in target river valleys Distribution of refugial waterholes across the northern Basin Blank cell Blank cell Blank cell Relationship between spell length and amount of waterhole habitat at the reach scale Blank cell Blank cell Blank cell Water loss rate Blank cell Blank cell Blank cell Waterhole shape and size Blank cell Blank cell Blank cell Connection to groundwater Blank cell Blank cell Blank cell Depth/Persistence relationship Change in the provision of sediment scouring flow events Sediment accumulation in waterholes, leading to reduced volume and persistence Sediment status of waterholes Amount of soft sediment in waterholes Blank cell Blank cell Blank cell Historical rate of sediment accumulation Blank cell Blank cell Effect of flows on sediment dynamics Identification of flow events or other conditions that lead to sediment infilling Blank cell Blank cell Blank cell Identification and quantification of scouring capacity of flows Project purpose This project addresses crucial knowledge gaps (Table 1.1) required to understand if the current EWRs set at the Lower Balonne Floodplain are suitable for maintenance of refugial waterholes, and determines if additional flow indicators are needed. Waterholes in the Barwon–Darling upstream of Menindee Lakes were also investigated, to understand whether particular flow requirements should be specified for this part of the northern Basin.
FINAL%20Report_Waterholes%20Project%20northern%20Basin.docx