11 Aquatic Ecology 11 1 eisdocs dsdip qld gov au

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11 AQUATIC ECOLOGY, A number of submissions regarding aquatic ecology were received on the EIS T hese submissions have been. grouped into the following themes, flora and fauna including species of conservation significance and surveys for. aquatic habitat,aquatic plants,Bell s turtles Wollumbinia belli. potential impacts and risk assessment including fish passage and. monitoring and management, The issues raised regarding these themes are discussed below. 11 1 Aquatic Flora and Fauna, A number of submissions required further field surveys for the assessment of aquatic flora and fauna The key.
issues raised by the submissions regarding flora and fauna were the need for additional surveys of flora and. fauna during a non drought period a requirement for surveys of Bell s turtles Wollumbinia belli a more detailed. assessment of aquatic habitat surveys in the upper reaches of the Severn River a more detailed assessment of. aquatic plants and further information regarding species of conservation significance. Additional aquatic flora and fauna surveys were undertaken by frc environmental in May and September 2013. The complete technical reports are provided in Appendix F and Appendix G. 11 1 1 Survey Methodology,Survey Design, Additional field surveys were completed from 20 to 26 May 2013 and from 9 to 15 September 2013 The May. survey comprised an assessment of freshwater turtles and aquatic habitat The September survey comprised an. assessment of aquatic habitat aquatic plants freshwater turtles fish and platypus. Site Details, A total of 13 sites were surveyed Table 11 1 and Figure 11 1 Turtles were surveyed at 12 sites aquatic. habitat aquatic plants fish and platypus were surveyed at 13 sites Of the sites surveyed for freshwater turtles. sites F and D were moved slightly between the May and September surveys as access restrictions prevented a. return to the locations surveyed in May There was no accessible reference site for the turtle survey in May. EMU SWAMP DAM SUPPLEMENTARY REPORT,Table 11 1 Site location details. Site Month Surveyed Easting Northing Description of Location Surveyed for. Upstream of the Proposed Dam Inundation area, SRUS1 September 398403 6827832 Approx imately 25 km upstream of the proposed dam site Aquatic habitat aquatic plants fish and platy pus. SRUS2 September 393001 6824977 Approx imately 14 km upstream of the proposed dam site Aquatic habitat aquatic plants fish and platy pus. L May and September 390118 6821121 Approx imately 7 km upstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. Fii September 389376 6820006 Approx imately 6 3 km upstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. Fi May 389263 6819746 Approx imately 5 9 km upstream of the proposed dam site Aquatic habitat turtles. Within Proposed Dam Inundation area, I May and September 386835 6818211 Approx imately 2 1 km upstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus.
J May and September 386753 6818469 Approx imately 1 8 km upstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. E May and September 385571 6819198 Approx imately 0 5 km upstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. Downstream of the Proposed Dam, K May and September 384494 6818591 Approx imately 1 6 km dow nstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. C May and September 385977 6816579 Approx imately 4 7 km dow nstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. A May and September 385802 6814846 Approx imately 7 6 km dow nstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. B May and September 384199 6813675 Approx imately 10 2 km dow nstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. Di May 381996 6814586 Approx imately 14 2 km dow nstream of the proposed dam site Aquatic habitat turtles. Dii September 381710 6815393 Approx imately 15 3 km dow nstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. G May and September 381568 6815888 Approx imately 16 4 km dow nstream of the proposed dam site Aquatic habitat aquatic plants turtles fish and platy pus. Reference area, BRUS September 396211 6810315 Bald Rock Creek in Girraw een National Park Aquatic habitat turtles. EMU SWAMP DAM SUPPLEMENTARY REPORT,Ye ats Rd Hale,Marin o Rd. Dalcouth d,Crossing R r,Twin Ho us,Rd berts R,r u n c khor. B Su g ar l oa f Rd,an Lane ub b,Jo ne s Rd,s L an e Rd.
Lo fa ro s,Graham ey d R eid,n R Rd SRUS2,Nie lsens R d. Ni ch ol s,Rd Back Cr,ee k Rd ll Rd, I QENV2 Projects QE06732 Spatial ArcGIS Figures AQUATIC ECOLOGY FIGURE11 1 AquaticEcology SEISSurveySites mxd Produced 1 11 2013. Bendee Lane,W inkl er R d,Ca vall a r,tir Ke rridg e s. Glen Aplin,Stalling L Marin is,an wa m Fi,her R J Kentu c k. C Bo Be lfo rd Rd,G or ge R d Eukey,Ji Nundubbermere G.
Watte rs R d,b e lli Rd Ballandean,C u rti ag,LEGEND EMU SWAMP DAM. Town Names Watercourse,SUPPLEMENTARY REPORT,Nundubbermere Falls Highway Figure 11 1. Survey Sites Road,Aquatic habitat aquatic plants fish and platypus. Park Forests and Reserves,SEIS Survey Sites, Aquatic habitat aquatic plants turtles fish and platypus Full Supply Level 738m AHD. Aquatic habitat freshwater turtles Kilometres,Scale 1 130 000.
Projection GDA94 MGA56,Aquatic Habitat Surveys, The condition of in stream habitat at each site was assessed based on the Australian River Assessment System. AUSRIVAS protocol described in the Queensland AUSRIVAS Sampling and Processing Manual DNRM 2001. including the following parameters,in situ water quality. water depth and velocity,bank erosion, substrate composition silt clay sand pebble cobble and boulder. channel diversity pool riffle run etc and, in stream habitat in stream vegetation large woody debris and substrate characteristics. The habitat at each site was also assessed for physical barriers to fish passage and the suitability for Bell s. turtles and turtle nesting, Habitat bio assessment score datasheets DNRM 2001 were used to produce an overall habitat condition.
assessment score,Aquatic Plants Surveys, Aquatic plants were surveyed using methods similar to those outlined in the River and Riparian Land. Management Technical Guideline Dixon et al 2006 Aquatic plants were assessed along two 100 x 10 m belt. transects at each site one transect in the water in stream and one transect on the bank on bank Both. transects were parallel to the water s edge At each site in each transect aquatic plants were identified and the. following recorded,species richness, growth form of each species submerged free floating attached floating or emergent. total percent cover of substrate bed bank covered by each species and. whether the plant was native or exotic to Australia. The Census of Queensland Flora 2010 Queensland Herbarium 2010 was used to classify aquatic vegetation as. native or exotic,Turtle Surveys, Turtle surveys were conducted as per the recommendations in the 2011 Survey Guidelines for Australia s. Threatened Reptiles for Bell s turtles DSEWPaC 2011 where site access and timing constraints allow At each. site five cathedral turtle traps which allow turtles to surface and breathe were baited with meat and set at each. site for between six and ten hours In September turtles were also surveyed using a combination of muddling. dip netting snorkelling and or spotlighting for 1 hour at each site In addition a Fyke net was used at site. BRUS in September the only site with suitable conditions for fyke netting during the surveys The sampling. effort was lower in May than in September due to shorter days and less suitable conditions for turtle activity i e. colder water temperature Detailed information on the sampling effort is provided in the technical report. Appendix G, All turtles sighted or captured including species other than Bell s turtle were identified and counted and where. practical their carapace length weight and sex were recorded. EMU SWAMP DAM SUPPLEMENTARY REPORT,Fish Surveys, Fish communities were surveyed using a combination of electrofishing and baited traps where water levels were.
suitable All available habitats e g pool riffle run and bend were fished at each site Electrofishing was. conducted using a Smith Root LR 24 backpack electrofisher in shallow water in accordance with the Australian. Code of Electrofishing Practice 1997 Where there was sufficient water five small 2 mm mesh size baited traps. were set at each site for a minimum of two hours Detailed information on the sampling effort is provided in the. technical report Appendix F, To avoid the re capture of fish all caught fish were kept in an aerated nally bin filled with water on the shore. until the last trap was retrieved The life history stage abundance and apparent health of every fish caught were. recorded and fish were returned to the water,Platypus Surveys. Platypus were surveyed at each site using timed observational surveys at dusk and or dawn Appendix F. Surveys were conducted from a canoe where water depth allowed or from the bank at shallow sites Surveys. conducted using a canoe were timed for an hour over a distance of up to 1 km Surveys conducted from the. bank were timed for 30 minutes over a distance of up to 500 m The number of platypus observed and the. abundance by size small medium large were recorded Brief searches of the banks were undertaken at each. site for platypus burrows,11 1 2 Aquatic Habitat,General Description. Aquatic habitat was similar throughout the Project area a detailed description of the aquatic habitat at each site. including fish passage and suitability for Bell s turtles is provided in Table 11 2. The reach environs at most sites had been moderately disturbed by human activities including historical. vegetation clearing cropping and grazing and private weirs The width of the riparian zone was generally. narrow 1 15 m with the exception of one site upstream of the proposed dam and two sites downstream of the. proposed dam where the riparian zone was 20 m or wider Eucalypt melaleuca and or casuarina trees. dominated the riparian vegetation at all sites along with native grasses and shrubs In general riparian. vegetation was semi continuous to continuous along the banks with the exception of one site upstream of the. proposed dam and one site downstream of the proposed dam Riparian vegetation at these sites was scattered. or clumped due to historical clearing, Banks were moderately stable to stable at all sites due to extensive riparian vegetation and substantial areas of. bedrock and boulders Substrate composition was varied at all sites but typically dominated by bedrock. boulders and sand, Channel diversity was divided between sites dominated by weir pools and sites with a combination of flow types.
e g shallow and or deep flowing and or still Sites in weir pools included. site Fii upstream of the proposed dam inundation area. site I within the proposed dam inundation area and. sites C A and G downstream of the proposed dam site. EMU SWAMP DAM SUPPLEMENTARY REPORT, The downstream end of site K downstream of the proposed dam site was also in the upstream extent of a weir. In stream habitat at most sites comprised scattered large and small woody debris and some detritus. overhanging vegetation and trailing bank vegetation There were in stream emergent aquatic plants at some. sites upstream of the proposed dam within the proposed dam inundation area and downstream of the dam site. Submerged aquatic plants were also present in stream at some sites upstream within and downstream of the. dam typically in the large pools, The results of the 2013 habitat assessment are consistent with the EIS surveys and literature review which. found that riparian vegetation woody debris in stream habitat diversity and macrophyte growth were generally. good in the vicinity of the Project but that weir pools had affected the aquatic habitat at a number of locations. SKM 2008 Davies et al 2012 The Sustainable Rivers Audit SRA assessment of hydrology in the Montane. Zone of the Border Rivers Valley also indicated altered hydrology with high over bank floods flow seasonality. and low and zero flow events differing from the reference condition. Habitat Condition, Aquatic habitat condition was moderate to good at all of the sites surveyed With the exception of site G. downstream of the proposed dam site aquatic habitat condition was generally better at sites within and. downstream of the proposed dam than at sites upstream of the proposed inundation area Compared to sites. with high bio assessment scores sites with lower habitat bio assessment scores typically had. lower in stream diversity and available cover, areas of historically cleared riparian vegetation and. more deposition of fine sediments sand and silt clay. These results are consistent with the EIS and State of the Rivers SOR assessments. Fish Passage, The existing weirs as identified throughout the area in the EIS restrict fish passage in periods of low and.
moderate average flow That is fish passage is currently restricted upstream of and within the proposed. inundation area and downstream of the proposed dam site except in periods of high flow Passage is less. 11 Aquatic Ecology 11 1 11 1 Aquatic Flora and Fauna 11 1 11 2 Potential Impacts Mitigation Measures and Risk Assessment 11 32 11 3 Monitoring and Management 11 44 11 4 Conclusion 11 46 EMU SWAMP DAM SUPPLEMENTARY REPORT PAGE 11 1 11 AQUATIC ECOLOGY A number of submissions regarding aquatic ecology were received on the EIS These submissions have been grouped into the following themes

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