DOCSLIB.ORG

Investigation of Groundwater in the Upper Motueka River Catchment Science Report Michael K

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Investigation of Groundwater in the Upper Motueka River Catchment Science Report Michael K Investigation of groundwater in the Upper Motueka River Catchment Science Report Michael K. Stewart, Timothy Y.-S. Hong, Stewart C. Cameron, 2003/32 Chris Daughney, Tamara Tait and Joseph T. Thomas September 2005 Investigation of groundwater in the Upper Motueka River Catchment Michael K. Stewart Timothy Y.-S. Hong Stewart C. Cameron Chris Daughney Tamara Tait Institute of Geological & Nuclear Sciences Joseph T. Thomas Tasman District Council, Richmond Institute of Geological & Nuclear Sciences science report 2003/32 Institute of Geological & Nuclear Sciences Limited Lower Hutt, New Zealand September 2005 Gracefield Research Centre, 69 Gracefield Road, P O Box 30368, Lower Hutt, New Zealand, Telephone: +64-4-570 1444, Facsimile: +64-4-570 4600 A Crown Research Institute BIBLIOGRAPHIC REFERENCE Stewart, Michael K., Hong, Timothy Y.-S., Cameron, Stewart C., Daughney, Chris, Tait, Tamara and Thomas, Joseph T. 2005. Investigation of groundwater in the Upper Motueka River Catchment. Institute of Geological & Nuclear Sciences science report 2003/32. 53p. Michael K. Stewart, Institute of Geological & Nuclear Sciences Limited, Wellington Timothy Y.-S.. Hong, Institute of Geological & Nuclear Sciences Limited, Taupo Stewart C. Cameron, Institute of Geological & Nuclear Sciences Limited, Taupo Chris Daughney, Institute of Geological & Nuclear Sciences Limited, Wellington Tamara Tait, Institute of Geological & Nuclear Sciences Limited, Taupo Joseph T. Thomas, Tasman District Council, Richmond © Institute of Geological & Nuclear Sciences Limited, 2005 ISSN 1171-9184 ISBN 0-478-09828-6 CONTENTS EXECUTIVE SUMMARY................................................................................................................................... ii KEYWORDS........................................................................................................................................................ iii 1. INTRODUCTION ...................................................................................................................................1 1.1 Background .................................................................................................................................1 1.2 Study area....................................................................................................................................1 1.3 Hydrological monitoring network ...............................................................................................2 2. HYDROGEOLOGY................................................................................................................................4 2.1 Groundwater recharge ...............................................................................................................12 2.1.1 Groundwater discharge from the Moutere Gravel......................................................12 2.1.2 Rainfall infiltration .....................................................................................................12 2.1.3 River flow loss............................................................................................................13 2.2 Groundwater storage .................................................................................................................16 2.2.1 Stream Depletion ........................................................................................................17 3. GROUNDWATER-RIVER-RAINFALL MODELLING ..................................................................21 3.1 Study objective..........................................................................................................................21 3.2 Methodology .............................................................................................................................21 3.2.1 Dynamic artificial neural network ..............................................................................21 3.2.2 Sensitivity Analysis Procedures .................................................................................22 3.3 Model development...................................................................................................................22 3.3.1 Data Selection.............................................................................................................22 3.3.2 Variable selection .......................................................................................................23 3.3.3 Model Performance Criteria .......................................................................................24 3.4 Modelling results.......................................................................................................................24 4. GEOCHEMISTRY................................................................................................................................31 4.1 Introduction ...............................................................................................................................31 4.2 Chemical Compositions.............................................................................................................31 4.2.1 Methods ......................................................................................................................31 4.2.2 Results ........................................................................................................................31 4.2.2.1 Motueka-type waters.....................................................................................35 4.2.2.2 Motupiko-type waters ...................................................................................37 4.3 Oxygen-18 Concentrations........................................................................................................38 4.4 Groundwater Dating ..................................................................................................................39 4.4.1 Monthly δ18O values .................................................................................................39 4.4.2 CFC and Tritium Dating.............................................................................................43 5. DISCUSSION AND CONCLUSIONS .................................................................................................44 6. REFERENCES ......................................................................................................................................47 ©Institute of Geological & Investigation of groundwater in the Nuclear Sciences Limited i Upper Motueka River Catchment EXECUTIVE SUMMARY Groundwater investigation in the Upper Motueka catchment is a key end user-driven component of the Integrated Catchment Management (ICM) project, a six year programme which commenced in July 2000. The goal of the ICM project is to conduct multi-disciplinary, multi-stakeholder research to provide information and knowledge that will improve the management of land, freshwater, and near-coastal environments in catchments with multiple, interacting, and potentially conflicting land uses. The principal aims of the investigations are to understand the hydrogeology of the Upper Motueka valley (including parts of the Motupiko and Tadmor valleys), the aquifer hydraulic properties, the occurrence of groundwater (recharge, storage and discharge), and the connectivity to the rivers. Understanding these will give a conceptual model of the river/groundwater system to constrain computational models. The study area lies within the Moutere Depression at lower altitude and has moderate rainfall (900-1300 mm). Higher land to the east with rainfall up to 2000 mm feeds the upper reaches of the Motueka River. Comparison of the Motueka River flow at the gorge and upstream of the Wangapeka River confluence shows that much of the flow, and particularly much of the low flow, are generated within the comparatively small gorge headwater area, comprising ultramafics and Maitai Group sediments. Below the gorge, the catchment contains Moutere Gravel. The Motupiko and Tadmor catchments are predominantly Moutere Gravel. The hydrogeology of the study area is described in Chapter 2. Within the Upper Motueka, Motupiko and Tadmor river valleys, groundwater is abstracted from shallow, thin (<15m), unconfined, alluvial gravel aquifers that receive recharge from river flow loss and local rainfall. Four potentially groundwater-bearing river terrace formations have been identified, which from youngest to oldest are: recent river gravel deposits, Speargrass Formation, Tophouse Formation, and Manuka Formation. The groundwater-bearing formations are underlain by the relatively low permeability Moutere Gravel Formation. At present, groundwater is abstracted from the lower three terrace formations only. The piezometric contours in the valleys are close to being at right angles with the rivers, showing that groundwater flow is primarily along the valleys, but piezometric contours, river flow measurements, and river stage RL heights have identified reaches where river flow is lost to groundwater and reaches where groundwater contributes to river flow. River flow loss occurs from Higgins and Quinneys Bush to Hyatts, river gain from Hyatts to Tapawera Bridge, river loss from Tapawera Bridge to Glenrae, and river gain below Glenrae where the valley narrows. Pump test and groundwater level recorder data have been used to estimate the hydraulic connection between the river and the formations from which groundwater is abstracted. Rainfall infiltration of 0.33 m/yr (based on annual rainfall
Load more

Recommended publications
  • Abel Tasman.Indd
    DAYOUT. IN TASMAN BAY WALKS The relaxed lifestyle, excellent climate, beautiful beaches, picnic Walks in the Motueka - Kaiteriteri - Abel Tasman spots and very popular walks have always attracted New Zealand National Park area: holidaymakers to this area, especially at the end of December and throughout January when the population soars. 1 The Motueka Walkway - 2.5 hours If you want to be sure of your trip, you’ll need to book Pick up a free map at the Motueka Information Centre (well accommodation in advance. Outside those months, there are signposted, just off the High Street). more vacancies There are motels, campsites, backpackers lodges On this track you’ll see some splendid views of Tasman Bay and bed ‘n breakfasts to cater for all budgets in the towns and with glimpses of small-town New Zealand without the tourist surrounding areas. trappings. Interesting features include: Abel Tasman National Park • The Port - the centre of one of Motueka’s main industries If you want to walk the Abel Tasman Track, you’ll need to reserve - fishing. Evidence lies in the rusting hulk of the Janie Seddon, a in advance with the Department of Conservation, as numbers large vessel that lies in the estuary sand near the walkway. of walkers have had to be limited. But using water taxis, it’s • The track leads you beside a tidal estuary that changes possible to do sections of the track on a dayout without worrying from mud flats with wading birds to a beautiful seascape at full about bookings. tide. MOTUEKA • A wide variety of NZ houses from small, older baches Motueka is a small town at the mouth of the Motueka River, (holiday houses) to large, modern homes owned by Motueka’s which flows into Tasman Bay.
    [Show full text]
  • Moutere Gravels
    LAND USE ON THE MOUTERE GRAVELS, I\TELSON, AND THE DilPORTANOE OF PHYSIC.AL AND EOONMIC FACTORS IN DEVJt~LOPHTG THE F'T:?ESE:NT PATTERN. THESIS FOR THE DEGREE OF MASTER OF ARTS ( Honours ) GEOGRAPHY UNIVERSITY OF NEW ZEALAND 1953 H. B. BOURNE-WEBB.- - TABLE OF CONTENTS. CRAFTER 1. INTRODUCTION. Page i. Terminology. Location. Maps. General Description. CH.AFTER 11. HISTORY OF LAND USE. Page 1. Natural Vegetation 1840. Land use in 1860. Land use in 1905. Land use in 1915. Land use in 1930. CHA.PrER 111. PRESENT DAY LAND USE. Page 17. Intensively farmed areas. Forestry in the region. Reversion in the region. CHA.PrER l V. A NOTE ON TEE GEOLOGY OF THE REGION Page 48. Geological History. Composition of the gravels. Structure and surface forms. Slope. Effect on land use. CHA.mm v. CLIMATE OF THE REGION. Page 55. Effect on land use. CRAFTER Vl. SOILS ON Tlffi: MGm'ERE GRAVELS. Page 59. Soil.tYJDes. Effect on land use. CHAPrER Vll. ECONOMIC FACTORS WrIICH HAVE INFLUENCED TEE LAND USE PATTERN. Page 66. ILLUSTRATIONS AND MAPS. ~- After page. l. Location. ii. 2. Natu.ral Vegetation. i2. 3. Land use in 1905. 6. Land use regions and generalized land use. 5. Terraces and sub-regions at Motupiko. 27a. 6. Slope Map. Folder at back. 7. Rainfall Distribution. 55. 8. Soils. 59. PLATES. Page. 1. Lower Moutere 20. 2. Tapawera. 29. 3. View of Orcharding Arf;;a. 34a. 4. Contoured Orchard. 37. 5. Reversion and Orchards. 38a. 6. Golden Downs State Forest. 39a. 7. Japanese Larch. 40a. B.
    [Show full text]
  • MUSIC MAN Community 3-7
    October 2017 Inside this issue: MUSIC MAN Community 3-7 Recreation 9-11 Arts and Crafts 13 Moutere Youth 15 Food 17 Animals 19-21 Gardening 22 Health & Wellbeing 23 Trade & Services 26 directory Recycled materials are a perfect basis for Lawrie Feely’s stringed instruments Special points of interest: and stored for 30 years, and I’ve used it in a lot of my L O C A L L I V E S instruments. Each wood has a different sound.” His favourite is the strum stick—a portable version of Every Friday Sharing table the dulcimer that can be played like a guitar instead of MHCC Eight-string island ukuleles, strum sticks and mountain on a table. “Backpackers love them,” he says. Also dulcimers are everywhere to be seen in Lawrie Feely’s popular is a stringed instrument that can be played by workshop. Created from recycled venetian blinds, fruit anyone who’s capable of a single finger tune on the 14 October: The Andrew bowls, tabletops and bedheads, each one looks and piano. “You can make music out of anything,” says London Trio—page 11 sounds unique. Lawrie, pulling out a ‘tin-canjo’ with a decorative biscuit- Lawrie has been making instruments since going to a tin body to prove his point. 70th birthday party down South and playing along with a 20 October: Musical When he’s not making instruments, Lawrie can be found group of ladies from the marae on the ukulele. “Next repairing horse gear, such as covers, bridles and saddle bingo—page 10 day, I took some photos and measurements and made strapping.
    [Show full text]
  • Newsletter 26Th October 2018.Pub
    Murchison Area School 61 Waller Street P O Box 73 Murchison 7049 Phone 03 5239 072 [email protected] 26th October 2018 Term 4 School Wide Value — Consideration Kia ora, Moghrey Mie, I have spoken in recent weeks about our ERO (Education Review Office) report that we had last term. The final report has now been published and is an official document for all to see. I have placed this on our school website (www.murchison.school.nz ). It can also be found on the ERO website at www.ero.govt.nz . The following are some extracts from the report: 1) “Respectful and caring relationships contribute to equitable and successful outcomes for students. Students learn in a settled and supportive learning environment. Teachers know students very well as individuals and as learners and focus on their holistic wellbeing and academic success. Individual students’ learning is well tracked and monitored by classroom teachers. The school and wider community work closely to support and enrich students’ learning.” 2) “Students who need extra assistance to succeed are very well supported. There are improved systems to effectively identify, monitor and support these students. The school works constructively with parents and experts beyond the school to find solutions to improve student outcomes at home and at school. Students with additional learning needs benefit from well -considered individual learning plans and are supported towards full inclusion.” 3) “The vision, values and priorities that underpin the school’s culture and curriculum are well known and evident in practice. This includes restorative practices and growth mindset approaches.The school’s valued outcomes for students are regularly shared to build and embed understanding.
    [Show full text]
  • Car Company Nelson U7 2018
    Car Company Nelson U7 2018 Draw dated 3/5/18 Game times are posted on the Monday prior on our website http://www.tasmanrugby.co.nz/draws-results/juniorage-grade Date Home Away Venue Week 1 5/5/2018 Tapawera: U7 V Murchison: U7 Tapawera 5/5/2018 Rangers: U7 V Riwaka: Aqua Taxi U7 Black Upper Moutere 5/5/2018 Wanderers: U7 Gold V Waimea Old Boys: U7 Griffins Lord Rutherford Park 5/5/2018 Wanderers: U7 Stripes V Riwaka: Aqua Taxi U7 White Lord Rutherford Park 5/5/2018 Wanderers: U7 Blue V Waimea Old Boys: U7 Mako Lord Rutherford Park 5/5/2018 Nelson: U7 Blue V Nelson: U7 White Neale Park 5/5/2018 Waimea Old Boys: U7 Red V Huia: U7 Jubilee Park 5/5/2018 Waimea Old Boys: U7 White V Stoke: U7 White Jubilee Park 5/5/2018 Marist: U7 V Stoke: U7 Red Tahunanui Week 2 12/5/2018 Wanderers: U7 Stripes V Murchison: U7 Lord Rutherford Park 12/5/2018 Wanderers: U7 Gold V Riwaka: Aqua Taxi U7 Black Lord Rutherford Park 12/5/2018 Wanderers: U7 Blue V Riwaka: Aqua Taxi U7 White Lord Rutherford Park 12/5/2018 Stoke: U7 Red V Waimea Old Boys: U7 Red Greenmeadows 12/5/2018 Rangers: U7 V Tapawera: U7 Upper Moutere 12/5/2018 Huia: U7 V Waimea Old Boys: U7 Griffins Sports Park Motueka 12/5/2018 Nelson: U7 White V Waimea Old Boys: U7 White Neale Park 12/5/2018 Nelson: U7 Blue V Marist: U7 Neale Park 12/5/2018 Stoke: U7 White V Waimea Old Boys: U7 Mako Greenmeadows Week 3 19/5/2018 Tapawera: U7 V Wanderers: U7 Stripes Tapawera 19/5/2018 Murchison: U7 V Wanderers: U7 Blue Murchison 19/5/2018 Waimea Old Boys: U7 Griffins V Stoke: U7 Red Jubilee Park 19/5/2018 Waimea
    [Show full text]
  • New Zealand 16 Marlborough Nelson Chapter
    ©Lonely Planet Publications Pty Ltd Marlborough & Nelson Why Go? Marlborough Region ....400 For many travellers, Marlborough and Nelson will be their Picton ........................... 400 introduction to what South Islanders refer to as the ‘Main- Marlborough Sounds ...404 land’. Having left windy Wellington, and made a white- Queen Charlotte Track ...407 knuckled crossing of Cook Strait, folk are often surprised to fi nd the sun shining and the temperature up to 10 degrees Kenepuru & Pelorus Sounds.............409 warmer. Good pals, these two neighbouring regions have much Blenheim ........................411 in common beyond an amenable climate: both boast re- Kaikoura ........................ 416 nowned coastal holiday spots, particularly the Marlborough Nelson ...........................423 Sounds and Abel Tasman National Park. There are two other Nelson Lakes national parks (Kahurangi and Nelson Lakes) and more National Park ................430 mountain ranges than you can poke a stick at. Motueka ........................432 And so it follows that these two regions have an abun- Motueka to Abel dance of luscious produce: summer cherries for a starter, Tasman ..........................435 but most famously the grapes that work their way into the Golden Bay ....................440 wineglasses of the world’s fi nest restaurants. Keep your pen- Kahurangi National knife and picnic set at the ready. Park ...............................444 When to Go? Best Places to Eat The forecast is good: Marlborough and Nelson soak up some » Green Dolphin (p 422 ) of New Zealand’s sunniest weather. January and February are the warmest months, with daytime temperatures aver- » Wither Hills (p 414 ) aging 22°C; July is the coldest, averaging 12°C. It’s wetter » Hopgood’s (p 428 ) and more windswept the closer you get to Farewell Spit and » Sans Souci Inn (p 442 ) the West Coast.
    [Show full text]
  • Conservation Campsites South Island 2019-20 Nelson
    NELSON/TASMAN Note: Campsites 1–8 and 11 are pack in, pack out (no rubbish or recycling facilities). See page 3. Westhaven (Te Tai Tapu) Marine Reserve North-west Nelson Forest Park 1 Kahurangi Marine Takaka Tonga Island Reserve 2 Marine Reserve ABEL TASMAN NATIONAL PARK 60 3 Horoirangi Motueka Marine KAHURANGI Reserve NATIONAL 60 6 Karamea PARK NELSON Picton Nelson Visitor Centre 4 6 Wakefield 1 Mount 5 6 Richmond Forest Park BLENHEIM 67 6 63 6 Westport 7 9 10 Murchison 6 8 Rotoiti/Nelson Lakes 1 Visitor Centre 69 65 11 Punakaiki NELSON Marine ReservePunakaiki Reefton LAKES NATIONAL PARK 7 6 7 Kaikōura Greymouth 70 Hanmer Springs 7 Kumara Nelson Visitor Centre P Millers Acre/Taha o te Awa Hokitika 73 79 Trafalgar St, Nelson 1 P (03) 546 9339 7 6 P [email protected] Rotoiti / Nelson Lakes Visitor Centre Waiau Glacier Coast P View Road, St Arnaud Marine Reserve P (03) 521 1806 Oxford 72 Rangiora 73 0 25 50 km P [email protected] Kaiapoi Franz Josef/Waiau 77 73 CHRISTCHURCH Methven 5 6 1 72 77 Lake 75 Tauparikākā Ellesmere Marine Reserve Akaroa Haast 80 ASHBURTON Lake 1 6 Pukaki 8 Fairlie Geraldine 79 Hautai Marine Temuka Reserve Twizel 8 Makaroa 8 TIMARU Lake Hāwea 8 1 6 Lake 83 Wanaka Waimate Wanaka Kurow Milford Sound 82 94 6 83 Arrowtown 85 6 Cromwell OAMARU QUEENSTOWN 8 Ranfurly Lake Clyde Wakatipu Alexandra 85 Lake Te Anau 94 6 Palmerston Te Anau 87 8 Lake Waikouaiti Manapouri 94 1 Mossburn Lumsden DUNEDIN 94 90 Fairfield Dipton 8 1 96 6 GORE Milton Winton 1 96 Mataura Balclutha 1 Kaka Point 99 Riverton/ INVERCARGILL Aparima Legend 1 Visitor centre " Campsite Oban Stewart Island/ National park Rakiura Conservation park Other public conservation land Marine reserve Marine mammal sanctuary 0 25 50 100 km NELSON/TASMAN Photo: DOC 1 Tōtaranui 269 This large and very popular campsite is a great base for activities; it’s a good entrance point to the Abel Tasman Coast Track.
    [Show full text]
  • Tools for Integration in the Motueka Catchment, New Zealand
    Collaboration and modelling – Tools for integration in the Motueka catchment, New Zealand# Andrew Fenemor1*, Neil Deans2, Tim Davie3, Will Allen3, John Dymond5, Margaret Kilvington3, Chris Phillips3, Les Basher1, Paul Gillespie4, Roger Young4, Jim Sinner4, Garth Harmsworth5, Maggie Atkinson1 and Rob Smith6 1 Landcare Research, Private Bag 6, Nelson, New Zealand 2 Nelson Marlborough Fish & Game Council, Nelson, New Zealand 3 Landcare Research, Lincoln, New Zealand 4 Cawthron Institute, Nelson, New Zealand 5 Landcare Research, Palmerston North, New Zealand 6 Tasman District Council, Richmond, Nelson, New Zealand Abstract A conceptual model of integrated catchment management (ICM) is presented in which ICM is defined as a process to achieve both ecosystem resilience and community resilience. It requires not only biophysical knowledge developed by hydrologists and other environmental scientists, but an active partnership with catchment communities and stakeholders to break the ‘paradigm lock’ described by the UNESCO-HELP programme. This paper reports observations from ICM research in the Motueka HELP demonstration basin in the upper South Island of New Zealand. The Motueka occupies 2 170 km2 of land yet the river effects are felt on the seabed more than 50 km2 off- shore, so the true ‘catchment’ is larger. A hydrologically temperate mountainous catchment with horticultural, agricultural, plantation forestry and conservation land uses, the Motueka also hosts an internationally recognised brown trout fishery. Land and water management issues driving ICM research include water allocation conflicts between instream and irrigation water uses, impacts on water quality of runoff from intensifying land uses, catchment impacts on coastal productivity and aquacul- ture, and how to manage catchment processes in an integrated way that addresses cumulative effects of development.
    [Show full text]
  • Abel Tasman Coast Track Brochure
    Plan and prepare ABEL TASMAN ABEL TASMAN COAST TRACK Takaka COAST TRACK HEAPHY TRACK Duration: 3–5 days Great Walks season: Distance: 60 km (one way) All year Motueka Karamea NELSON Nelson Picton Visitor Centre Wakefield BLENHEIM Westport Murchison St Arnaud Rotoiti/Nelson Lakes Visitor Centre Punakaiki Reefton Paparoa National Park Visitor Centre Kaikoura Greymouth Hanmer Springs Kumara Hokitika Arthur’s Pass National Park Visitor Centre Oxford Rangiora Kaiapoi Franz Josef/Waiau Westland Tai Poutini National Park Visitor Centre CHRISTCHURCH Ōtautahi/Christchurch Visitor Centre Methven Aoraki/Mount Cook Aoraki/Mt Cook National Park Akaroa Visitor Centre Haast ASHBURTON Awarua/Haast Visitor Centre Geraldine Fairlie Temuka Twizel Makaroa TIMARU ROUTEBURN TRACK Wanaka Kurow Waimate Milford Sound Tititea/Mount Aspiring National Park Visitor Centre Arrowtown MILFORD TRACK Cromwell QUEENSTOWN OAMARU Whakatipu-wai-Māori/ Ranfurly Queenstown Visitor Centre Clyde Alexandra KEPLER TRACK Palmerston Te Anau Te Rua-o-te-moko/Fiordland National Park Visitor Centre Waikouaiti Mossburn Lumsden DUNEDIN Fairfield Ōtepoti/Dunedin Visitor Centre Dipton GORE Milton Winton Mataura Balclutha Kaka Point Riverton/ Aparima INVERCARGILL RAKIURA TRACK Oban Stewart Island/ Rakiura National Park Rakiura Visitor Centre Elevation profile & track guide Tinline Akersten Bay ABEL Campsite Te Pukatea Bay Bark Bay Hut 30 campers Campsite and Campsite 6 campers Campsite 14 campers 34 bunks Coquille Bay Observation Beach Anchorage Hut 80 campers Campsite Campsite and Campsite TASMAN 12 campers 12 campers 34 bunks Apple Tree Bay 100 campers Mārahau Shelter Campsite Watering Cove Torrent and car park 30 campers Campsite Bay Village COAST 160 m 10 campers Campsite 20 campers 80 m TRACK 0 m 4 hr / 12.4 km 4 hr / 11.5 km With a mild climate, golden beaches and lush, coastal native bush, the Abel Tasman Coast Track has it all.
    [Show full text]
  • The Signature of an Extreme Erosion Event on Suspended Sediment Loads: Motueka River Catchment, South Island, New Zealand
    184 Sediment Dynamics in Changing Environments (Proceedings of a symposium held in Christchurch, New Zealand, December 2008). IAHS Publ. 325, 2008. The signature of an extreme erosion event on suspended sediment loads: Motueka River catchment, South Island, New Zealand D. M. HICKS1 & L. R. BASHER2 1 National Institute of Water and Atmospheric Research, PO Box 8602, Christchurch, New Zealand [email protected] 2 Landcare Research, Private Bag 6, Nelson Mail Centre, Nelson 7042, New Zealand Abstract Five years of continuously monitoring turbidity and suspended sediment (SS) at four sites in the Motueka River catchment, northern South Island, New Zealand, has characterised the downstream and temporal dispersion of high SS inputs from an extreme rainfall event. The rainstorm, of >50 year recurrence interval, was concentrated in the upper Motueka and Motupiko tributaries and delivered high sediment outputs from re-activated gully complexes and landslides. These only appear to activate when a rainfall threshold is exceeded. Monitoring stations in these tributaries captured a ~20- to 30-fold increase in SS concentrations and event sediment yields, whereas the monitoring station at the coast recorded only a 2- to 5-fold increase. The high concentrations and event yields decayed exponentially back towards normal levels over ~2–3 years at both upstream and downstream sites. Field observations suggest that this erosion recovery trend relates more to the exhaustion/stabilisation of transient riparian sediment storage than to “healing” of the primary erosion sites by surface-armouring and/or re-vegetation. The downstream decay relates both to dilution (from other tributaries carrying lower SS concentrations) and dispersion processes.
    [Show full text]
  • St James Conservation Area Brochure
    St James Conservation Area NORTH CANTERBURY Track grades Easy tramping track Hanmer Springs Moderate day or multi-day tramping/ The alpine spa resort town of Hanmer Springs is hiking the main gateway to the St James Conservation Track generally well formed, may be steep Area. rough or muddy Suitable for people with moderate fitness For complete information on accommodation, and some backcountry/remote area bike hire, transport and other Hanmer Springs experience visitor services, visit the website Track has signs, poles or markers. www.visithanmersprings.co.nz Major stream and river crossings are or contact the Hanmer Springs i-SITE Visitor bridged Centre on 0800 442 663. Light tramping/hiking boots required Tramping track Challenging day or multi-day tramping/ hiking Contact us: Track is mostly unformed with steep, rough For gate combination details, concessions, or muddy sections hunting permits and other information contact: Suitable for people with good fitness. Moderate to high-level backcountry skills DOC – Rangiora Office and experience, including navigation and 32 River Road, RANGIORA survival skills required 03 313 0820 Track has markers, poles or rock cairns 8.00 am – 5.00 pm, Monday to Friday Expect unbridged stream and river [email protected] crossings Tramping/hiking boots required Route For information on bike hire, transport and other Challenging overnight tramping/hiking accommodation go to: www.visithurunui.co.nz Track unformed and natural, may be rough and very steep Suitable for people with above-average fitness. High-level backcountry skills and Map backgrounds: Geographx experience, including navigation and All photos, unless otherwise credited, are copyright DOC.
    [Show full text]
  • THE NEW ZEALAND GAZETTE No. 79
    2002 THE NEW ZEALAND GAZETTE No. 79 NELSON CONSERVANCY-Continued Reg. Operator Postal Address Location of Mill No. 303 Baigent, H., and Sons Ltd. P.O. Box 97, Nelson .. Wakefield 221 Barnes, T. H., and Co. Ltd. Murphy's Road, Blenheim Okoha 155 Bastin, W., and Sons Edward Street, Wakefield Maud Creek 112 Benara Timber Co. Ltd. P.O. Box 10, Nelson .. Mangarakau 199 Blackadder, W. D. .. Rahu, Reefton Rahu 152 Brown Creek Sawmilling Co. Ltd. P.O. Box 14, Ikamatua Ikamatua 286 Bruning, N. C. R.M.D., Takaka Waitapu 290 Bryant Bros. P.O. Box 240, Blenheim Canvastown 8 Chamberlain Construction Ltd. P.O. Box 291, Nelson Korere 161 Chandler Bros. Care of P.O. Box 63, Westport Mokihinui 229 Couper Bros. Rai Valley Marlborough Rai Valley 213 Crispin, A. C. R. Havelock .. Havelock 178 Cronadun Timbers Ltd. P.O. Box 234, Greymouth Larry's Creek (1) 24 De Boo Bros. Rai Valley .. Carluke 156 Deck Bros. Riwaka R.M.D. 3, Motueka Riwaka 173 Donnelly Milling Co. Ltd. Care of P.O. Box 10, Nelson " Hope 277 Duncan, J. W. C. and N. H. Tapawera R.D. 2, Wakefield .. Tapawera 200 Eggers, R. T., and Sons Ltd. R.D. No.2, Upper Moutere, Nelson Harakeke 282 Farrington, L. and M. Mistlands, Tutaki R.D., Murchison Tutaki 292 Fleming Bros. Howard Post Office, Nelson Howard 257 Fleming, W. T. A. Waller Street, Murchison Murchison 183 Gibson, B. R. P.O. Box 184, Nelson Rai Valley 291 Gordon,· R. K. P.O. Box 34, Murchison Shenandoah 274 Granger Bros.
    [Show full text]