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Mid Coxs River Subcatchment

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Mid Coxs River Subcatchment Mid Coxs River Mid Coxs Appendix 4.2 Appendix Subcatchment summaries Subcatchment Mid Coxs River Subcatchment River Mid Coxs The Mid Coxs River subcatchment is located in the far-west section of the Hawkesbury Nepean catchment. It is characterised by narrow granite valleys and contains the World Heritage listed Jenolan Caves Karst Conservation Reserve. The subcatchment has signifi cant areas in reserved land in its lower reaches in the Kanagra Boyd National Park, part of the Greater Blue Mountains World Heritage Area. The subcatchment is highly valued for its recreational values by local and regional communities. Flows in the Mid Coxs River are impacted by impoundment at Lake Lyell. In the upper area of the subcatchment, there is signifi cant rural development, and pine plantations in the tributary headwaters both of which have altered the vegetation of this subcatchment. The impacts of these activities need to be well managed to prevent degradation of the near intact reaches downstream. There is a major Landcare association, the Lithgow Oberon Landcare Association, and numerous Landcare groups working in the subcatchment, as well as weed control and mapping programs undertaken by the National Parks and Wildlife Service. HAWKESBURY NEPEAN RIVER HEALTH STRATEGY 53 54 54 Reach Management Recommendations – Mid Coxs River Subcatchment Reach Name Reach Riparian Land Reach Values Reach Threats Reach management recommendations Description Management (Planning, Education, Works, Monitoring, Institutional) Category Megalong Conservation • Develop conservation management agreements to Creek R1 (Near Intact protect remnant riparian vegetation (P) outside HAWKESBURY NEPEAN CATCHMENT MANAGEMENT AUTHORITY MANAGEMENT NEPEAN CATCHMENT HAWKESBURY HAWKESBURY NEPEAN CATCHMENT MANAGEMENT AUTHORITY MANAGEMENT NEPEAN CATCHMENT HAWKESBURY reserve) Jenolan R1 From headwater Assisted • Good riparian vegetation • Modifi ed / engineered channel • Aquatic habitat condition and connectivity improvement in Jenolan State Regeneration • World Heritage Area (Kanangra Boyd • Damaging access (stock) (P,W) Forest through NP) • Barriers to ecosystem functioning • Maintain existing community based environment activity Jenolan Karst • Signifi cant environmental program • Flow extraction (E,P) Reserve to just tied to fl agship species (Brush Tailed • Management of stock impacts on waterways (W) downstream of Rock Wallabies) • Encourage adoption of sustainable land use practices in Jenolan Caves Rd • River based tourism contributes to riparian lands (P,E) (before STP) regional economy • Water quantity / fl ow management (I) • Signifi cant community based environment activity (Greencorps and volunteers) Jenolan R2 Assisted • Good riparian vegetation • Modifi ed / engineered channel • Aquatic habitat condition and connectivity improvement Regeneration • World Heritage Area (Kanangra Boyd • Damaging access (human – localised to camping (P,W) NP) ground) • Maintain existing community based environment activity • Popular recreational fi shing • Barriers to ecosystem functioning (E,P) • Signifi cant environmental program • Flow extraction • Water quality / nutrient management (I) tied to fl agship species (Brush Tailed • Manage human impacts at public recreation river access Rock Wallabies) Action Triggers points and along foreshores (E,W) • River based tourism contributes to • Severe downstream impact (STP at Jenolan regional economy Caves) • Signifi cant community based environment activity (Greencorps and volunteers) Jenolan R3 Gorge from just Assisted • Good riparian vegetation • Occasional aquatic weed outbreaks (Water • Aquatic habitat condition and connectivity improvement downstream of Regeneration • Good river condition Nasturtium) (P,W) Jenolan Caves rd • World Heritage Area (Kanangra Boyd • Barriers to ecosystem functioning • Management of aquatic weeds (P,W) to Coxs – nearly National Park) • Flow extraction • Water quantity / fl ow management all in Kanangra • Signifi cant vegetation community • Sediment impacts from pine plantations • Water quality / nutrient management Boyd National (Grey Myrtle Dry Rainforest) upstream • Removal/replacement of exotic riparian vegetation (P,W) Park • Signifi cant community based • Maintain existing community based environment activity environment activity Action Triggers (E,P) • Severe immediate threat (Jenolan Caves • Develop conservation management agreements to Sewerage Treatment Plant nutrients) protect remnant riparian vegetation (P) • Severe downstream impact (weeds) HAWKESBURY NEPEAN RIVER HEALTH STRATEGY NEPEAN RIVER HEALTH HAWKESBURY Reach Management Recommendations – Mid Coxs River Subcatchment Reach Name Reach Riparian Land Reach Values Reach Threats Reach management recommendations Description Management (Planning, Education, Works, Monitoring, Institutional) Category Mid Coxs R1 1. Lake Lyell to Assisted • Good riparian vegetation • Aquatic weed outbreaks (Elodia & Umbrella • Management of aquatic weeds (P,W) Duddawarra Regeneration • National Park Weeds) • Aquatic habitat condition and connectivity improvement (downstream • Signifi cant vegetation community • Barriers to ecosystem functioning (P,W) to Deddawarra (Wollondilly / Shoalhaven Gorge • Flow regulation (Drinking water dams) • Water quantity / fl ow management (I) Gully on Clarke Woodland) • Flow extraction • Maintain existing community based environment activity Simpson Rd) • Popular recreational fi shing (E,P) 2. Duddawarra • Popular swimming • Maintenance of recreational values (M) past Sandy • Signifi cant fl agship species Hook to bend (Platypus) downstream • Signifi cant community based of “Riverview” environment activity (Mt Kanimbla (between and Kanimbla Valley Landcare Nortons and Groups) Pulpit Hill Cks) Mid Coxs R2 From bend Conservation • Develop conservation management agreements to downstream (most in protect remnant riparian vegetation (P) of “Riverview”, reserve) between Nortons Most of reach in Kanangra Boyd National Park and Pulpit Hill Cks to Kowmung River confl uence Jocks R1 Headwater from Assisted • Good riparian vegetation • Damaging access (stock) • Management of stock impacts on waterways (W) Great Dividing Regeneration • Flow extraction • Encourage adoption of sustainable land use practices in Range adjacent riparian lands (P,E) to Mt Arthur on Action Triggers • Removal/replacement of exotic riparian vegetation (W) Rydal – Hampton • Severe immediate threat – Crack Willow • Increase community capacity for environmental Rd to just restoration (E) downstream of the Old Bathurst Rd (fi re trail) Jocks R2 From just Assisted • Good riparian vegetation • Damaging access (stock) • Management of stock impacts on waterways (W) downstream of Regeneration • Good river condition • Barriers to ecosystem functioning • Encourage adoption of sustainable land use practices in Old Bathurst Rd • Signifi cant vegetation community • Flow extraction riparian lands (P,E) to confl uence (Wollondilly-Shoalhaven Gorge • Sediment impacts from upstream • Aquatic habitat condition and connectivity improvement with Coxs River Woodland) (P,W) • Identifi ed Flagship Species • Water management – quantity (I) (Platypus; Bentwing Bats) • Maintain existing community based environment activity • Some community based (E,P) environment activity (Catchment • Develop conservation management agreements to Protection Scheme) protect remnant riparian vegetation (P) 55 Appendix 4.2 Subcatchment summaries Mid Coxs River 56 56 Reach Management Recommendations – Mid Coxs River Subcatchment Reach Name Reach Riparian Land Reach Values Reach Threats Reach management recommendations Description Management (Planning, Education, Works, Monitoring, Institutional) Category River Lett R1 Conservation • Develop conservation management agreements to (Near Intact protect remnant riparian vegetation (P) outside HAWKESBURY NEPEAN CATCHMENT MANAGEMENT AUTHORITY MANAGEMENT NEPEAN CATCHMENT HAWKESBURY HAWKESBURY NEPEAN CATCHMENT MANAGEMENT AUTHORITY MANAGEMENT NEPEAN CATCHMENT HAWKESBURY reserve) River Lett R2 From Kerosene Assisted • Good riparian vegetation • Damaging access (human at public recreation • Manage human impacts at public recreation river access Creek to junction Regeneration • National Park access points at council parks) points and along foreshores (E,W) with Coxs River • Signifi cant vegetation community • Barriers to ecosystem functioning • Aquatic habitat condition and connectivity improvement (Wollondilly-Shoalhaven Gorge • Flow extraction (P,W) Woodland) • Water quantity / fl ow management (I) • Popular recreational fi shing Action Triggers • Maintenance of recreational values (M) • Popular swimming • Severe downstream impact (STP discharge into • Maintain existing community based environment activity • Signifi cant environmental program tributary) (E,P) tied to fl agship species (Australasia • Water quality / nutrient management (I) buxifolia) • Signifi cant irrigation water supply • Signifi cant community based environment activity Little River R1 State Forest Assisted • Good riparian vegetation cover • Damaging access • Management of stock impacts on waterways (W) upper section Regeneration • Barriers to ecosystem functioning • Encourage adoption of sustainable land management practices in riparian lands (E) • Aquatic habitat condition and connectivity improvement (P,W) • Increase community capacity for environmental restoration (E) Little River R2 Not listed Assisted • Good riparian vegetation • Sediment impacts from reaches upstream • Increase community capacity for environmental Regeneration • Good river condition restoration (E) • Popular recreational fi shing • Develop conservation management agreements to protect remnant riparian vegetation (P) Little River R3 Not listed Assisted • Good riparian vegetation • Clearing of fl oodplain • Removal/replacement of exotic riparian vegetation (W) Regeneration • Popular recreational fi shing • Willows • Increase community capacity for environmental restoration (E) Creeks of Community Concern: Lowther Creek..
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