DOCSLIB.ORG

Derwent Catchment Review

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Derwent Catchment Review Derwent Catchment Review PART 1 Introduction and Background Prepared for Derwent Catchment Review Steering Committee June, 2011 By Ruth Eriksen, Lois Koehnken, Alistair Brooks and Daniel Ray Table of Contents 1 Introduction ..........................................................................................................................................1 1.1 Project Scope and Need....................................................................................................1 2 Physical setting......................................................................................................................................1 2.1 Catchment description......................................................................................................2 2.2 Geology and Geomorphology ...........................................................................................5 2.3 Rainfall and climate...........................................................................................................9 2.3.1 Current climate ............................................................................................................9 2.3.2 Future climate............................................................................................................10 2.4 Vegetation patterns ........................................................................................................12 2.5 River hydrology ...............................................................................................................12 2.5.1 Overview....................................................................................................................12 2.5.2 Long-term flow patterns in the Derwent...................................................................17 2.5.3 Diversions out of the Derwent...................................................................................21 2.5.4 Short-term flow variability in the Derwent ...............................................................22 3 Water allocations and use ..................................................................................................................26 3.1 Water usage....................................................................................................................26 3.2 Water licenses, allocations and surety levels .................................................................26 3.3 Water allocation by region..............................................................................................28 3.3.1 Lower Derwent River and Tributaries........................................................................28 Water Use Restrictions...........................................................................................................30 3.3.2 Upper Derwent River and Tributaries (Above Meadowbank Dam) ..........................33 3.3.3 Ouse River..................................................................................................................35 3.3.4 Clyde River .................................................................................................................39 3.3.5 Other Tributaries .......................................................................................................43 3.4 Hydro Storages................................................................................................................45 3.5 Irrigation schemes (future) .............................................................................................45 3.5.1 Shannon Clyde Irrigation Scheme..............................................................................45 3.5.2 South East Irrigation Scheme.....................................................................................47 3.5.3 Future irrigation expansion and sustainable yields ...................................................48 3.6 Drinking Water Supply ....................................................................................................48 Page i PART 1 Derwent Catchment Review 3.7 Non-consumptive water use...........................................................................................52 3.7.1 Hydro-electric power generation ..............................................................................52 3.7.2 Aquaculture and fisheries..........................................................................................52 4 Land uses and natural values..............................................................................................................53 4.1 Land Use..........................................................................................................................53 4.1.1 Industry and urban centres........................................................................................56 4.2 Natural values .................................................................................................................56 4.2.1 Wetlands....................................................................................................................56 4.2.2 Geoconservation........................................................................................................57 5 Water quality and quantity management ..........................................................................................60 5.1 Overview .........................................................................................................................60 5.2 Protected Environmental Values ....................................................................................60 5.3 Water quality guidelines.................................................................................................60 5.4 Water Management Plans ..............................................................................................64 5.5 Rivercare and Conservation Action Plans .......................................................................64 5.6 Hydro Tasmania management and issues ......................................................................64 6 Known inputs to the Derwent and identified water quality threats ..................................................66 6.1 Land Use driven inputs....................................................................................................66 6.2 Sewage Treatment Plants ...............................................................................................66 6.3 Level 2 activities..............................................................................................................67 6.4 Forestry ...........................................................................................................................67 6.5 Agriculture.......................................................................................................................67 6.6 Pesticides ........................................................................................................................69 6.7 Fish farms........................................................................................................................69 6.8 Threats to natural systems and conservation areas.......................................................70 6.9 Climate change................................................................................................................70 6.10 Salinity.........................................................................................................................70 6.11 Impacts of regulated flow regimes .............................................................................70 Page ii PART 1 Derwent Catchment Review Table of Figures Figure 1 Greater Derwent catchments .......................................................................................2 Figure 2 Map of the study areas showing major waterbodies, towns and rivers within the greater Derwent catchment. ......................................................................................................4 Figure 3 Broad geological features of mainland Tasmania, based on Seymour et al, 2006.......5 Figure 4 Geomorphic river types of the greater Derwent catchment........................................7 Figure 5 Location of karst systems within the greater Derwent catchment. ...........................8 Figure 6 Rainfall at Lake St Clair National Park, and at Bushy Park showing variability within catchment ...................................................................................................................................9 Figure 7 Average rainfall & runoff (mm) for the River Derwent, compared to major rivers in Tasmania...................................................................................................................................10 Figure 8 Projected rainfall variation for near future (2010 – 2030) under scenario A2 high emissions ..................................................................................................................................11 Figure 9 Schematic representation of power developments in the Derwent Catchment ......14 Figure 10 Schematic of Derwent catchment showing main flow paths and water storages in Hydro system. ...........................................................................................................................16 Figure 11. Monthly flow analysis for select waterways in the Derwent catchment based on average daily flow data. ..........................................................................................................17
Load more

Recommended publications
  • Overland Track Terms and Conditions
    Terms and Conditions Overland Track Individual Booking System These terms and conditions form an agreement carry your Overland Track Pass and Tasmanian National Parks between Tasmania Parks and Wildlife Service (PWS) Pass with you as you walk, and have them readily accessible and all walkers booking their walk on the Overland for inspection by an Overland Track Ranger. Track. By accepting a booking on the Overland Track, 2. PRICING STRUCTURE AND CONCESSIONS you (the walker) agree to be bound by the terms and The current pricing structure (Australian dollars) is as listed conditions described below. at www.overlandtrack.com.au/booking. You will be walking in a wilderness area of a national park. You understand and accept that there are potential dangers Child concession (5-17 yrs) and you are undertaking such an activity at your own risk. A 20% discount is offered for walkers aged from 5 to 17 years. You acknowledge and agree that you will undertake the We don’t recommend the track for children under the age of 8, walk voluntarily and absolutely at your own risk, with a full as it’s very important they are physically and mentally able to appreciation of the nature and extent of all risks involved in the cope, and are well-equipped. walk and will be properly prepared and equipped. PWS will not Applications may be made on behalf of Children provided that: be held responsible for any injury that may occur to yourself or any member of your walking party while using the track. (i) they must be accompanied by a person over the age of 18 years when undertaking the Overland Track; 1.BOOKING AND PAYING FOR YOUR WALK (ii) that person cannot be responsible for any more than Booking your departure date on the track and paying for your a total of 3 Children walk is essential during the booking season, from 1 October to (iii) that person will be fully responsible for the care, control 31 May inclusive.
    [Show full text]
  • May 2017 May 2017
    May 2017 May 2017 Winners of the Tasmanian trout fishing photo competition Congratulations to the winners of the Tasmanian Trout Fishing Photo Competition. The junior winner is Sabyn Harris with his photo, Four Springs Lake. First prize in the adult category goes to The adult runner up is David Green with his Steven Ooi for his photo, Western Lakes photo, Tyenna River. We would like thank everyone who entered the Tasmanian Trout Fishing Photo Competition. We received over 150 entries and it was a very hard job to select the winners. Congratulations really goes to all of you who entered. Thanks for sharing you inland fishing experiences with us. Page 2 of 25 May 2017 Contents Hot topics .......................................................................................................................................................................... 4 Trout Weekend 2017 ................................................................................................................................................ 4 Brown trout spawning run and transfers ............................................................................................................... 4 Community Infrastructure Fund successful projects ........................................................................................... 4 Carp Workshop 2017 ................................................................................................................................................ 4 Anglers Access – Neil Morrow ...................................................................................................................................
    [Show full text]
  • Tamar Fire Management Area Bushfire Risk Management Plan 2020
    Tamar Fire Management Area Bushfire Risk Management Plan 2020 Document Control Document History Version Date Author Section V1 2019 Steve Summers Agency Endorsements Agency Name & Title Signature Date Document Endorsement Endorsed by Tamar Fire Management Area Committee Accepted by State Fire Management Council Ian Sauer Chair, SFMC Date: 11/06/2020 Cover Page Photo Acknowledgement: Fuel Reduction Trevallyn, Steve Summers Page 2 of 30 Tamar Bushfire Risk Management Plan 2019 Contents Glossary ................................................................................................................................................. 5 Acronyms .............................................................................................................................................. 7 Executive Summary ................................................................................................................................ 8 1. Introduction ................................................................................................................................. 10 1.1 Background ....................................................................................................................................... 10 1.2 Purpose of this plan .......................................................................................................................... 10 2. Establishing the context ................................................................................................................ 11 2.1 Description
    [Show full text]
  • New Residents Kit Index
    New Residents Kit 2017/2018 Central Highlands Council Administration Works & Services 6 Tarleton Street HAMILTON TASMANIA 7140 Phone: (03) 6286 3202 Fax: (03) 6286 3334 * * * * Development & Environmental Services 19 Alexander Street BOTHWELL TASMANIA 7030 Inside this kit: Phone: (03) 6259 5503 Fax: (03) 6259 5722 Municipal Map 3 Township 5-7 Information Disclaimer Central Highlands Council has made every endeavor to ensure that details Waste 8 are correct at the time of printing but can accept no responsibility for any inaccuracy or mis-deception contained in the publication as a result of Building/ Planning/ 8 information supplied. Plumbing Councillors 9 All efforts have been made to ensure the accuracy of information in this document. If there are any additions or alterations required could you Dog Registrations 9 please advise us of the correct information, in writing from an authorized person representing your organization or service. Feedback/Request 14 Form Page 2 New Residents Kit Index Welcome by Mayor ...................................................................................................................... 3 Municipal Map .............................................................................................................................. 3 About our Council ......................................................................................................................... 4 Community Development Grant Applications .................................................................................. 4 Hamilton
    [Show full text]
  • The Evolution of Tasmania's Energy Sector
    Electricity Supply Industry Expert Panel The Evolution of Tasmania’s Energy Sector Discussion Paper April 2011 The Evolution of Tasmania’s Energy Sector Discussion Paper Electricity Industry Panel - Secretariat GPO Box 123 Hobart TAS 7001 Telephone: (03) 6232 7123 Email: [email protected] http://www.electricity.tas.gov.au April 2011 © Copyright State of Tasmania, 2011 Table of Contents Glossary ..................................................................................................................................................... 5 Foreword ................................................................................................................................................... 1 1. Highlights ........................................................................................................................................... 3 2. The Tasmanian Electricity Market - Agents of Change ............................................................. 7 3. A New Strategic Direction for Tasmania’s Energy Market – the 1997 Directions Statement ....................................................................................................................................... 12 4. Delivering the Reform Framework .............................................................................................. 14 4.1. Structural Reform of the Hydro-Electric Commission ....................................................... 14 4.2. The Development of Supply Options ................................................................................
    [Show full text]
  • 6. Annual Review and Significant Events
    6. Annual Review and Significant Events January-April: wet in the tropics and WA, very hot in central to eastern Australia For northern Australia, the tropical wet season (October 2005 – April 2006) was the fifth wettest on record, with an average of 674 mm falling over the period. The monsoon trough was somewhat late in arriving over the Top End (mid-January as opposed to the average of late December), but once it had become established, widespread heavy rain featured for the next four months, except over the NT and Queensland in February. One particularly noteworthy event occurred towards the end of January when an intense low (central pressure near 990 hPa) on the monsoon trough, drifted slowly westward across the central NT generating large quantities of rain. A two-day deluge of 482 mm fell at Supplejack in the Tanami Desert (NT), resulting in major flooding over the Victoria River catchment. A large part of the central NT had its wettest January on record. Widespread areas of above average rain in WA were mainly due to the passages of several decaying tropical cyclones, and to a lesser extent southward incursions of tropical moisture interacting with mid-latitude systems. Severe tropical cyclone Clare crossed the Pilbara coast on 9t h January and then moved on a southerly track across the western fringes of WA as a rain depression. Significant flooding occurred around Lake Grace where 226 mm of rain fell in a 24-hour period from 12 t h to 13 t h January. Tropical cyclone Emma crossed the Pilbara coast on 28 th February and moved on a southerly track; very heavy rain fell in the headwaters of the Murchison River on 1s t March causing this river’s highest flood on record.
    [Show full text]
  • Rapid Reserve Generation from a Francis Turbine for System Frequency Control
    energies Article Rapid Reserve Generation from a Francis Turbine for System Frequency Control Dean R. Giosio 1,*, Alan D. Henderson 2, Jessica M. Walker 1 and Paul A. Brandner 1 1 Australian Maritime College, University of Tasmania, Launceston 7250, Tasmania, Australia; [email protected] (J.M.W.); [email protected] (P.A.B.) 2 School of Engineering & ICT, University of Tasmania, Hobart 7005, Tasmania, Australia; [email protected] * Correspondence: [email protected]; Tel.: +61-3-6324-9489 Academic Editor: K.T. Chau Received: 24 February 2017; Accepted: 31 March 2017; Published: 7 April 2017 Abstract: The increase in contributions from non base load renewables, such as wind and solar, can have adverse effects on the stability of an electrical grid. In this study, the possibility of rapidly loading a Francis turbine from a tail water depression (TWD) mode for providing additional system frequency control is investigated. Based on the analysis of full-scale TWD test results and key findings from the transient testing of a micro-hydro scale turbine unit, a detailed description of the TWD transition process is given. The formulation of an improved turbine model for use in one-dimensional hydro-electric plant models is presented with simulation results compared to full-scale data. The analytical model, which calculates output power according to the conservation of angular momentum and identified sources of loss, is used in parallel with full-scale and model scale test observations to elucidate the events and mechanisms occurring during this proposed transition. The output response, in terms of active power, was found to be highly dependent on guide vane opening rate in both full-scale and model tests.
    [Show full text]
  • Water Management in the Anthony–Pieman Hydropower Scheme
    Water management in the Anthony–Pieman hydropower scheme Pieman Sustainability Review June 2015 FACT SHEET Background The Anthony–Pieman hydropower scheme provides a highly valued and reliable source of electricity. The total water storage of the hydropower scheme is 512 gigalitres and the average annual generation is 2367 gigawatt hours. Construction of the Anthony–Pieman hydropower scheme has resulted in creation of water storages (lakes) and alterations to the natural flow of existing rivers and streams. The Pieman Sustainability Review is a review of operational, social and environmental aspects of the Anthony–Pieman hydropower scheme that are influenced by Hydro Tasmania. This fact sheet elaborates on water management issues presented in the summary report, available at http://www.hydro.com.au/pieman-sustainability-review Water storage levels in the Anthony–Pieman Water levels have been monitored at these storages since hydropower scheme their creation in stages between 1981 and 1991. The Anthony–Pieman hydropower scheme includes eight Headwater storages: Lake Mackintosh and Lake water storages, classified as headwater storages (Lakes Murchison Mackintosh and Murchison), diversion storages (Lakes Lakes Mackintosh and Murchison are the main headwater Henty and Newton and White Spur Pond) and run-of-river storages for the Anthony–Pieman hydropower scheme. storages (Lakes Rosebery, Plimsoll and Pieman). Lakes The water level fluctuates over the entire operating range Murchison, Henty and Newton and White Spur Pond do not from Normal Minimum Operating Level (NMOL) to Full release water directly to a power station; rather they are Supply Level (FSL) (Figures 1, 2). used to transfer water to other storages within the scheme.
    [Show full text]
  • Edition 2 from Forest to Fjaeldmark the Vegetation Communities Highland Treeless Vegetation
    Edition 2 From Forest to Fjaeldmark The Vegetation Communities Highland treeless vegetation Richea scoparia Edition 2 From Forest to Fjaeldmark 1 Highland treeless vegetation Community (Code) Page Alpine coniferous heathland (HCH) 4 Cushion moorland (HCM) 6 Eastern alpine heathland (HHE) 8 Eastern alpine sedgeland (HSE) 10 Eastern alpine vegetation (undifferentiated) (HUE) 12 Western alpine heathland (HHW) 13 Western alpine sedgeland/herbland (HSW) 15 General description Rainforest and related scrub, Dry eucalypt forest and woodland, Scrub, heathland and coastal complexes. Highland treeless vegetation communities occur Likewise, some non-forest communities with wide within the alpine zone where the growth of trees is environmental amplitudes, such as wetlands, may be impeded by climatic factors. The altitude above found in alpine areas. which trees cannot survive varies between approximately 700 m in the south-west to over The boundaries between alpine vegetation communities are usually well defined, but 1 400 m in the north-east highlands; its exact location depends on a number of factors. In many communities may occur in a tight mosaic. In these parts of Tasmania the boundary is not well defined. situations, mapping community boundaries at Sometimes tree lines are inverted due to exposure 1:25 000 may not be feasible. This is particularly the or frost hollows. problem in the eastern highlands; the class Eastern alpine vegetation (undifferentiated) (HUE) is used in There are seven specific highland heathland, those areas where remote sensing does not provide sedgeland and moorland mapping communities, sufficient resolution. including one undifferentiated class. Other highland treeless vegetation such as grasslands, herbfields, A minor revision in 2017 added information on the grassy sedgelands and wetlands are described in occurrence of peatland pool complexes, and other sections.
    [Show full text]
  • Hydro 4 Water Storage
    TERM OF REFERENCE 3: STATE-WIDE WATER STORAGE MANAGEMENT The causes of the floods which were active in Tasmania over the period 4-7 June 2016 including cloud-seeding, State-wide water storage management and debris management. 1 CONTEXT 1.1 Cause of the Floods (a) It is clear that the flooding that affected northern Tasmania (including the Mersey, Forth, Ouse and South Esk rivers) during the relevant period was directly caused by “a persistent and very moist north-easterly airstream” which resulted in “daily [rainfall] totals [that were] unprecedented for any month across several locations in the northern half of Tasmania”, in some cases in excess of 200mm.1 (b) This paper addresses Hydro Tasmania’s water storage management prior to and during the floods. 1.2 Overview (a) In 2014, Tasmania celebrated 100 years of hydro industrialisation and the role it played in the development of Tasmania. Hydro Tasmania believes that understanding the design and purpose of the hydropower infrastructure that was developed to bring electricity and investment to the state is an important starting point to provide context for our submission. The Tasmanian hydropower system design and operation is highly complex and is generally not well understood in the community. We understand that key stakeholder groups are seeking to better understand the role that hydropower operations may have in controlling or contributing to flood events in Tasmania. (b) The hydropower infrastructure in Tasmania was designed and installed for the primary purpose of generating hydro-electricity. Flood mitigation was not a primary objective in the design of Hydro Tasmania’s dams when the schemes were developed, and any flood mitigation benefit is a by-product of their hydro- generation operation.
    [Show full text]
  • January 2020
    DERWENT VALLEY COUNCIL NEWS Issue 6 - January 2020 COMMUNITY GRANTS Each year, Council provides funding to community CONGRATULATIONS TO groups through its Community Grants Program, Round One of the Community Small Grants Program awarding more than $230,000 since the Community 2019/2020 awarded seven grants to community groups Small Grants Program started in 1997. and organisations, with $14,000* of budgeted funds remaining for Round Two. Grants are available to Derwent Valley based, not for profit organisations for projects that provide a benefit Lachlan Hall Committee - $792 for the replacement of within the local community. Council encourages groups kitchen floor coverings who are completing an application to read the policy guidelines, ensure they have no outstanding acquittals Derwent Valley Choir - $400 for new music scores due, complete all sections of the application form and include letters of support. Upper Derwent United Hall Inc. - $500 for whipper snipper Round Two closes 5pm Tuesday, 11 February 2020. Derwent Valley State Emergency Service - $2,000 to To assist applicants with Grant policy, guidelines and purchase a rescue training dummy applications, Council will be running a free info session. This session is for both new and previous applicants, and Westerway Primary School for $1,000 for 100th is an opportunity to ensure your submissions are strong Anniversary event activities and ask any questions you may have. Derwent Valley Arts - $1,199 for an outdoor data This session will be held from 12.30pm - 1.30pm, Tuesday projector 21 January in the Council Social Rooms. Registration is not necessary. *New Norfolk Neighbourhood Watch were previously approved for a grant of $3,025, with the condition that further funding was Questions and enquiries about applications can be acquired.
    [Show full text]
  • Listing Statement
    THREATENED SPECIES LISTING STATEMENT ORCHID L iawenee greenhood Pterostylis pratensis D. L. Jones 1998 Status Tasmanian Threatened Species Protection Act 1995 ……………………………….……..………..………………..vulnerable Commonwealth Environment Protection and Biodiversity Conservation Act 1999 ……………………..….….…...............Vulnerable Hans & Annie Wapstra Description December. In flower, the plants are 7 to 15 cm tall, Pterostylis pratensis belongs to a group of orchids with many closely sheathing stem leaves. They commonly known as greenhoods because the dorsal have 2 to 12 densely crowded white flowers with sepal and petals are united to form a predominantly dark green stripes. The hood apex curves down green, hood-like structure that dominates the abruptly and terminates with a short tip. The two flower. When triggered by touch, the labellum flips lateral sepals hang down and are fused to form a inwards towards the column, trapping any insect pouch below the labellum though the tips may inside the flower, thereby aiding pollination as the remain free. The labellum, which also hangs down, insect struggles to escape. Greenhoods are is whitish green, oblong with a shallowly notched deciduous terrestrials that have fleshy tubers, which tip and has an appendage that points out with a dark are replaced annually. At some stage in their life green, knob-like apex with a short, broad, blunt cycle all greenhoods produce a rosette of leaves. beak about 0.5 mm long. In all, the flowers are 7 to 8.5 mm long and 4.5 mm wide. The rosette of Pterostylis pratensis encircles the base of the flower stem. The 4 to 8 rosette leaves Its darker green and white flowers and larger leaves are dark green, crowded, and oval to circular can distinguish Pterostylis pratensis, which grows shaped with the broadest part in the middle, 25 to in montane and subalpine regions on the Central 35 mm long and 14 to 22 mm wide.
    [Show full text]