DOCSLIB.ORG

Mangaroa River Flood Hazard Assessment

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Mangaroa River Flood Hazard Assessment Mangaroa River Flood Hazard Assessment SUMMARY REPORT GW/FP-G-06/65 Final 29 May 2006 Mangaroa River Hazard Assessment SUMMARY REPORT GW/FP-G-06/65 Final 29 May 2006 Sinclair Knight Merz Level 12, Mayfair House 54 The Terrace PO Box 10-283 Wellington New Zealand Tel: +64 4 473 4265 Fax: +64 4 473 3369 Web: www.skmconsulting.com Executive Summary This report draws together the analysis of the hazards associated with the Mangaroa River to assist in the preparation of planning and policy controls for the Mangaroa Valley. A coupled one and two dimensional hydraulic model of the major channels in the valley was developed to predict and quantify the flooding hazards, further information about the model can be found in the Hydraulic Modelling Report GW/FP-T-06/63. The model was also used as part of a geological and morphology study to identify areas of the floodplain at risk of erosion by the river. Further detail of this investigation is contained within the Erosion Report GW/FP-T-06/64. Where these hazards have a high impact on property or endanger life a damage assessment has been carried out to provide an indication of the levels of risk associated with the river. The hydraulic model was then used to investigate the potential for a flood warning systems on the river. This investigation has identified extents and depths of flooding for a range of storm events and has established recommended building levels based on the 100 year flood. An “erosion hazard corridor” has been developed from the setbacks determined for each “at risk” area in the geomorphology and erosion investigation. Flood and Erosion Hazard Plans, included in this report, collate the findings of these investigations. The major findings and recommendations from this investigation are summarised below: In large flooding events the ponding behind Wallaceville Hill Road helps reduce the severity of flooding downstream of the road. This area should be maintained as a storage zone. Greater Wellington may wish to take this a step further and formalise the overflows into this area as long-term flood mitigation. The UHCC District Plan makes all building within the expected 100 year flooding zone of the Hutt River a discretionary activity this policy should be brought through to the Mangaroa River Valley to control development. A number of existing residential buildings were found to be at risk of flooding. These locations include the Upper Mangaroa area around Johnson’s and Russell’s Road, the Huia Homestead area, the house upstream of the Mangaroa Hill Road and the Maymorn Road Residential area. These areas should be investigated further to identify possible protection measures that could be implemented to reduce the risk. The Whiteman’s Valley Road Bridge at MIKE11 chainage 9010 was found to be a potential location for a flood warning system that could provide warning to many of the at risk areas in the flood hazard zone. Evacuation procedures could be developed for the at risk areas. Furthermore a gauging station at this location would assist in future calibration of flood flows as it is will be unaffected by the water levels of the Hutt River. SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\Summary Report (final).doc PAGE i Erosion hazard setbacks have been recommended for development around the river channel. No new development should occur in these zones unless justified by site specific analysis of the erosion hazard. The Earthworks restrictions in the UHCC District Plan should be applied to the erosion hazard zone developed in this study. Further investigation of the stability and risk should be carried out in specific locations where buildings are currently within the erosion hazard zones. SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\Summary Report (final).doc PAGE ii Contents 1. Introduction 4 1.1 Project Summary 4 2. Flooding Hazards Summary 5 2.1 Background 5 2.2 Model Hydrology 5 2.3 Model Description 7 2.4 Model Results 7 2.5 Design Scenarios and Freeboard 7 2.6 Flood Mapping 8 2.7 Modelling Results 8 3. Erosion Hazards Summary 17 3.1 Geological Mapping 17 3.2 Hypsometeric relief maps 17 3.3 Risk Assessment and Planning Constraints 17 4. Flood Damage Assessment 20 4.1 Method 21 4.2 Analysis for the without freeboard condition 23 4.3 Analysis for with freeboard condition 25 4.4 Results 28 5. Flood Warning Critical Level 29 5.1 Potential of the Te Marua Gauging Station for Flood Warning 29 5.2 Whiteman’s Valley Road Bridge 31 5.3 Flood Warning Recommendations 31 6. UHCC District Plan Provisions 33 6.1 Generic provisions in relation to flooding and erosion 33 7. Environmental Database 36 8. Planning and Recommendations 39 8.1 Hazard Area Maps 39 8.2 Recommendations 39 9. Reference 41 SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\Summary Report (final).doc PAGE 2 Document history and status Revision Date issued Reviewed by Approved by Date approved Revision type Final 29/05/06 BHF BHF 29/05/06 Final Distribution of copies Revision Copy no Quantity Issued to Final 1 10 Philip Purves (GW) Printed: 19 September 2006 Last saved: 20 July 2006 10:15 AM File name: I:\Aenv\Projects\AE02482\Deliverables\AE02482W0004.doc Author: Jahangir Alam Project manager: Benjamin Fountain Name of organisation: Greater Wellington Regional Council Name of project: Managaroa River Flood Hazard Assessment Name of document: Summary Report Document version: Final Project number: AE02482 SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\Summary Report (final).doc PAGE 3 1. Introduction This report seeks to provide the technical basis for the analysis of the existing hazards associated with the Mangaroa River. Hazard management plans have been developed through this study and these have been used to discuss policy for managing the risks associated with both the river flooding and erosion hazards. This report is supported by two documents that cover in greater detail the investigation methodology and results. These reports are; The Hydraulic Modelling Report (GW/FP-T-06/63) The Erosion Report (GW/FP-T-06/64) 1.1 Project Summary The hazards investigated in this study of the Mangaroa River, fall into the two categories, these are flooding and erosion. A coupled 1D-2D hydraulic model of the major channels in the valley was developed to predict and quantify the flooding hazards. This model was also used as part of a geological and morphology study to identify areas of the floodplain at risk of erosion by the river. Where these hazards have a high impact on property or endanger life a damage assessment has been carried out to provide an indication of the levels of risk associated with the river. The hydraulic model was then used to investigate the potential for a flood warning systems on the river. The Upper Hutt City Council District Plan has been summarised and a review of the literature on the environmental issues associated with the river has been carried out to identify other considerations that could influence the development of hazard management policy. To aid in the development of policy to manage the flood and erosion hazards associated with the Mangaroa river the information obtained through this study has been collated into combined Flood and Erosion Hazard Plans. SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\Summary Report (final).doc PAGE 4 2. Flooding Hazards Summary 2.1 Background The Mangaroa catchment has an area of 103 square kilometres. The Mangaroa River is approximately 20 km long from its headwaters around Russells Road to its confluence with the Hutt River, see Figure 2-1. Many of the sub-catchments that feed into the main river channel are very steep with falls of up to 500 meters over three to four kilometres. 15 – 20 % of the catchment is rural alluvial floodplain with the rest of the catchment made up of a mixture of indigenous forest, regenerating scrub and exotic forest. 2.2 Model Hydrology and Boundary Conditions An assessment of flood hydrology was completed by Greater Wellington’s Resource Investigation Department. The investigation is detailed in the report Investigation of Flood Hydrology of the Mangaroa Catchment (Watts, 2005). This study involved rainfall analyses for the Mangaroa Catchment including calibration and validation of a rainfall runoff model, modelling of design rainfall events and flood frequency analyses. The six hour storm events developed through this study were provided as inputs for the hydraulic modelling. The Hutt River was found to influence the water levels over the lower reaches of the Mangaroa River. A conservative 20 year water level in the Hutt River was used at the downstream boundary of the model. SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\Summary Report (final).doc PAGE 5 Figure 2-1 Location map of Mangaroa River Hutt River Russells Road Mangaroa River SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\Summary Report (final).doc PAGE 6 2.3 Model Description A coupled 1D-2D hydraulic model was chosen to simulate the flooding in the river. The DHI software packages MIKE11 and MIKE21 were used. During the initial stages of the investigation the significance of the Black Creek tributary was identified. The scope of the study was expanded to include the creek in the model. Cross section data was obtained from a survey carried out for this investigation. 167 cross-sections were used to construct a model of the main channels in MIKE11. One dimensional modelling provides a platform for effectively simulating structures, such as culverts and bridges, as well as channel processes. The left and right banks of the river channels were then linked to a MIKE21 two dimensional model of the floodplain.
Load more

Recommended publications
  • From Quiet Homes and First Beginnings 1879-1979 Page 1
    From Quiet Homes and First Beginnings 1879-1979 Page 1 From Quiet Homes and First Beginnings 1879-1979 "FROM QUIET HOMES AND FIRST BEGINNING"* 1879-1979 A History of the Presbyterian and Methodist Churches in Upper Hutt who, in 1976, joined together to form the Upper Hutt Co-operating Parish. By M. E. EVANS Published by THE UPPER HUTT CO-OPERATING PARISH Benzie Avenue, Upper Hutt, New Zealand 1979 *Title quotation from "Dedicatory Ode" by Hilaire Belloc. Digitized by Alec Utting 2015 Page 2 From Quiet Homes and First Beginnings 1879-1979 CONTENTS Acknowledgements Introduction ... THE PRESBYTERIAN CHURCH, 1879-1976 St David's In the beginning, 1897-1904 .... Church Extension, Mission Charge and Home Mission Station, 1904-23 Fully Sanctioned Charge. James Holmes and Wi Tako—1924-27 The Fruitful Years—1928-38 .... Division of the Parish—1938-53 Second Division—The Movement North —1952-59 .... "In My End is My Beginning"—1960-76 Iona St Andrew's THE METHODIST CHURCH, 1883-1976 Whitemans Valley—1883-1927 .... Part of Hutt Circuit—1927-55 .... Independent Circuit: The Years of Expansion—1955-68 Wesley Centre and the Rev. J. S. Olds .... Circuit Stewards of the Upper Hutt Methodist Church—1927-76 OTHER FACETS OF PARISH LIFE Women's Groups Youth Work .... THE CO-OPERATING PARISH, 1976-79 To the Present And Towards the Future SOURCE OF INFORMATION AND ACKNOWLEDGEMENTS PHOTOS AROUND THE PARISH IN 1979 OUTREACH TO THE FUTURE BROWN OWL CENTRE Page 3 From Quiet Homes and First Beginnings 1879-1979 ACKNOWLEDGEMENTS It is my pleasure to thank Mrs M. E.
    [Show full text]
  • Attachment 1 Wellington Regional Rail Strategic Direction 2020.Pdf
    WELLINGTON REGIONAL RAIL STRATEGIC DIRECTION 2020 Where we’ve come from Rail has been a key component of the Wellington Region’s transport network for more than 150 years. The first rail line was built in the 1870s between Wellington and Wairarapa. What is now known as the North Island Main Trunk followed in the 1880s, providing a more direct route to Manawatū and the north. Two branch lines were later added. The region has grown around the rail network, as villages have turned into towns and cities. Much of it was actively built around rail as transit-oriented development. Rail has become an increasingly important way for people to move about, particularly to Wellington’s CBD, and services and infrastructure have been continuously expanded and improved to serve an ever-growing population. The region is a leader in per capita use of public transport. Wellington Region Rail Timeline 1874 1927 1954 1982 2010 2021 First section of railway between Hutt line deviation opened as a branch Hutt line deviation to Manor EM class electric FP ‘Matangi’ class Expected Wellington and Petone between Petone and Waterloo Park, creating Melling line multiple units electric multiple completion 1955 introduced units introduced of Hutt line 1876 1935 Hutt line duplication to Trentham duplication, Hutt line to Upper Hutt Kāpiti line deviation to Tawa, creating 1983 and electrification to Upper Hutt 2011 Trentham to 1880 Johnsonville line Kāpiti line Rimutaka Tunnel and deviation Upper Hutt 1 Wairarapa line to Masterton 1 electrification Kāpiti line 2 1938 replace
    [Show full text]
  • Conjunctive Water Management Recommendations for the Hutt Valley Conjunctive Water Management Recommendations for the Hutt Valley
    Conjunctive water management recommendations for the Hutt Valley Conjunctive water management recommendations for the Hutt Valley Mark Gyopari Earth in Mind Ltd For more information, contact the Greater Wellington Regional Council: Wellington Masterton GW/ESC-T-15/77 PO Box 11646 PO Box 41 ISBN-978-1-927217-78-8 (online) ISBN-978-1-927217-77-1 (print) T 04 384 5708 T 06 378 2484 F 04 385 6960 F 06 378 2146 July 2015 www.gw.govt.nz www.gw.govt.nz www.gw.govt.nz [email protected] Report prepared by: Mark Gyopari Earth in Mind Ltd Report reviewed by: M Thompson Senior Environmental Scientist Report reviewed by: N Boyens Team Leader, Hydrology Report approved for release by: G Sevicke-Jones Manager, Environmental Science Date: July 2015 DISCLAIMER This report has been prepared by Environmental Science staff of Greater Wellington Regional Council (GWRC) and as such does not constitute Council policy. In preparing this report, the authors have used the best currently available data and have exercised all reasonable skill and care in presenting and interpreting these data. Nevertheless, GWRC does not accept any liability, whether direct, indirect, or consequential, arising out of the provision of the data and associated information within this report. Furthermore, as GWRC endeavours to continuously improve data quality, amendments to data included in, or used in the preparation of, this report may occur without notice at any time. GWRC requests that if excerpts or inferences are drawn from this report for further use, due care should be taken to ensure the appropriate context is preserved and is accurately reflected and referenced in subsequent written or verbal communications.
    [Show full text]
  • CYCLE TRAIL PETONE ORONGORONGO RIMUTAKA 2-3 DAYS 115Km Cycle Trail
    RIMUTAKA CYCLE TRAIL RIMUTAKA PETONE ORONGORONGO RIMUTAKA 2-3 DAYS 115km Cycle Trail Trail Info Summit Tunnel © Caleb Smith BELOW LEFT: Caspian terns © Rod Morris, Department of Conservation BELOW RIGHT: Seal Colony at Cape Palliser © Destination Wairarapa 2-3 Days Starting on Wellington’s doorstep, this trail winds the Rimutaka Rail Trail, one of the most 115km through the Rimutaka Ranges to the Wairarapa popular and historic trails in the region. Valley and the mouth of the Orongorongo River. After emerging in the Wairarapa, famous for vineyards and sheep farming, TRAIL GRADES: the trail follows a country road past rom the head of Wellington large river and great swimming spots to PETONE FORESHORE TO Lake Wairarapa to Ocean Beach. The Harbour, the Rimutaka Cycle cool off on a hot summer’s day as the MAYMORN - GRADE 2 (EASY). fi nal section is the shortest, but also 35km trail with an easy grade. Trail cuts through the trail gradually climbs to the head of the F the most adventurous. Aptly named The MAYMORN TO CROSS CREEK bush- clad Rimutaka Mountain Range, Hutt Valley. Wild Coast, it skirts around Turakirae - GRADE 2-3 (EASY TO passing through tunnels on an old INTERMEDIATE) 25km into New Beyond the valley the trail enters the Head, where the Rimutaka Range rail trail, and skirting around the wild Zealand’s bush-clad past. Tunnel Gully area in the Pakuratahi dives into the pounding Pacifi c Ocean. southern coast. CROSS CREEK TO OCEAN BEACH - Forest on what was once the main The trail then runs west to the mouth GRADE 3 (INTERMEDIATE) The fi rst stage is an easy riverside cycle railway line between Wellington and the of the Orongorongo River where the 36km on-road ride alongside Lake path called the Hutt River Trail.
    [Show full text]
  • Friday 18 October 2019 Duration: 9.03Am-3.28Pm Morning Tea: 10.35Am-10.57Am Lunch: 12.35Pm-1.30Pm
    New Zealand Geographic Board Ngā Pou Taunaha o Aotearoa (NZGB) MINUTES Venue: Pōhutukawa and Nikau meeting rooms Level 7, Radio New Zealand House 155 The Terrace Wellington Friday 18 October 2019 Duration: 9.03am-3.28pm Morning tea: 10.35am-10.57am Lunch: 12.35pm-1.30pm NOTE: All information recorded in these Minutes relating to Treaty of Waitangi settlement place name proposals is confidential and is not available to the general public. Some of the information may become available after Deeds of Settlement are signed. General 1. Karakia | Welcome Matanuku Mahuika opened the hui with a karakia. Obituaries Matanuku Mahuika acknowledged the recent passing of Lee Smith of Ngāti Kahungunu and noted the assistance as a te reo Māori translator that Lee Smith had given to the NZGB at various times. The Chairperson acknowledged the recent passing of Tahu Potiki, former Chief Executive of Te Rūnanga o Ngāi Tahu. Welcome The Chairperson welcomed everyone to the hui. He welcomed observer Philip Green from Te Arawhiti and advised that other representatives from Te Arawhiti would join the meeting when agenda item 11 ‘Treaty advice’ and item 9 ‘Standard for Crown Protected Area names’ are discussed. He also welcomed Daniel Wainwright, on secondment as the NZGB’s Advisor responsible for Treaty Names, and other members of the NZGB Secretariat. The Chairperson congratulated Adrienne Staples on her reappointment to Wellington Regional Council. The Chairperson noted that Paulette Tamati-Elliffe would be late arriving due to flight disruption. 2. Present | Apologies NZGB members (9) Anselm Haanen, Chairperson Surveyor-General, Land Information New Zealand (LINZ) Adam Greenland National Hydrographer, LINZ David Barnes Federated Mountain Clubs of New Zealand Inc.
    [Show full text]
  • On the Day Results 2021 Final 16Th May 2021.Xlsx
    2021 Upper Valley Primary Schools XC Championships Year 3 and Under Girls Year Name School Place 3 Maia Henderson Oxford Crescent 1 3 Taylah Nightingale Upper Hutt 2 3 Hazel Roos Oxford Crescent 3 3 Lucy Mclea Totara Park 4 3 Faith Hilton Pinehaven 5 3 Alice Pickering Pinehaven 6 2 Hazel Steel-Baker Pinehaven 7 3 Emily Pearce Upper Hutt 8 2 Ruby-Rose Hepi St Josephs 9 3 Frankie McGlinchey Pinehaven 10 2 Kaia Wilkes St Brendans 11 3 Lily Karena Fraser Crescent 12 3 London Cork Silverstream 13 3 Morgan Maia Pinehaven 14 3 Georgie Kingsbeer Oxford Crescent 15 3 Rosemary Carson Silverstream 16 3 Bonnie Jennings St Brendans 17 2 Eliska Smith Trentham 18 2 Skye O’Brien Trentham 19 1 Isla Burns Totara Park 20 1 Maya Collins St Brendans 21 2 Danni Lee Stewart Plateau 22 3 Nancy Whiting Hau Karetu (formally Māoribank) 23 2 Hazel Jahnke Trentham 24 2 Molly Robins Pinehaven 25 1 Daniela Grout St Brendans 26 2 Millie Flutey Trentham 27 2 Mia Alcock Trentham 28 2 Aria Chatley Plateau 29 3 Ashlee Poeira Mangaroa 30 3 Pippa McKinnel Trentham 31 2 Michelle Jacomb Upper Hutt 32 3 Aven Walkinshaw St Josephs 33 3 Adelyn Broughton Totara Park 34 2 Harper SMith Mangaroa 35 3 Rian Priestly Upper Hutt 36 3 Harmony Pairama Taliu Plateau 37 1 Jessa Blundell St Brendans 38 1 Faith Schutte Totara Park 39 3 Olivia Fisher van der Veen Hau Karetu (formally Māoribank) 40 2 Leah McKinnel Trentham 41 2 Patricia-Lee Whiting Hau Karetu (formally Māoribank) 42 1 Hadley Hewitt Oxford Crescent 43 2 Ariana October Trentham 44 1 Harper Erin Cann Pinehaven 45 3 Paige Duncan
    [Show full text]
  • Restoration of the Rimutaka Incline Railway Development Proposal
    Restoration of the Rimutaka Incline Railway Development Proposal and Environment Management Plan: Maymorn to Summit Executive Summary Rimutaka Incline Railway Heritage Trust November 2011. Photo: S class locomotive and train at Summit circa 1880. William Williams, Alexander Turnbull Library Page 1 of 46 Development Proposal and Environment Management Plan v2 Preface This document is an Executive Summary form of the Development Proposal and Assessment of Environmental Effects, which canvasses the issues which are considered to be important in relation to deciding whether approval should be given to reinstating the Rimutaka Incline Railway. This document provides a summary, via answers to key questions, concerning elements of the proposal and the main environmental, planning, design and construction issues. Information shown on maps and plans in this document are indicative only. Reference should be made to detailed maps and plans where referenced. Page 2 of 46 Development Proposal and Environment Management Plan v2 Contents Restoration of the Rimutaka Incline Railway .................................................................................. 1 Development Proposal and Environment Management Plan: Maymorn to Summit ....................... 1 Executive Summary ......................................................................................................................... 1 Preface ......................................................................................................................................... 2 Contents
    [Show full text]
  • Pinehaven Stream Flood Hazard Assessment
    Pinehaven Stream Flood Hazard Assessment FLOOD HAZARD INVESTIGATION REPORT: VOLUME 1 Revision E 25 May 2010 Pinehaven Stream Flood Hazard Assessment FLOOD HAZARD INVESTIGATION REPORT: VOLUME 1 Revision E 25 May 2010 Sinclair Knight Merz Level 12, Mayfair House 54 The Terrace PO Box 10-283 Wellington New Zealand Tel: +64 4 473 4265 Fax: +64 4 473 3369 Web: www.skmconsulting.com COPYRIGHT: The concepts and information contained in this document are the property of Sinclair Knight Merz Limited. Use or copying of this document in whole or in part without the written permission of Sinclair Knight Merz constitutes an infringement of copyright. LIMITATION: This report has been prepared on behalf of and for the exclusive use of Sinclair Knight Merz Limited’s Client, and is subject to and issued in connection with the provisions of the agreement between Sinclair Knight Merz and its Client. Sinclair Knight Merz accepts no liability or responsibility whatsoever for or in respect of any use of or reliance upon this report by any third party. The SKM logo trade mark is a registered trade mark of Sinclair Knight Merz Pty Ltd. Pinehaven Stream Hydraulic Modelling Report: Volume 1 Executive Summary This report details the first phase of the Pinehaven Stream flood hazard investigation undertaken by Sinclair Knight Merz (SKM) for the Greater Wellington Regional Council (GWRC) and Upper Hutt City Council (UHCC). The investigation sought to identify the flooding issues related to the Pinehaven Stream through hydraulic modelling, flood hazard mapping, flood damage assessment, erosion hazard assessment and a planning review. As the primary analysis tool a combined 1D and 2D hydraulic model was constructed of the Pinehaven Stream to assist in the development of flood hazard maps and to further understand the hydraulics contributing to the flood hazard.
    [Show full text]
  • Birchville Bridge to Kaitoke Regional Park
    52 Birchville Bridge to Kaitoke Regional Park This reach extends 4.7km between Birchville Bridge and the Te Marua reservoirs where farmed river terraces give way to bush-clad hills opposite the stock car track, where the river emerges from the Hutt Gorge at Kaitoke. the regenerating indigenous forest extends all the way to the river edge. The Kaitoke Regional Park boundary is just upstream of the Te Marua Golf Club. This reach of the river is the most natural, in terms of its geomorphology and minimal human interference /channelising. For the first part of the reach, upstream of Birchville True Left Bank Bridge, the river is cut down into the bedrock and confined to a narrow channel. The Emerald Hill residential area adjoins the river upstream of Birchville Bridge. Upstream, the river channel meanders across the full width of the valley floor. The The river trail here is located in a narrow berm between the top of the riverbank and river terraces within the river bends are occupied by farmland, Te Marua Golf Club, the residential boundary fences. Upstream of the residential area the old river terraces are stock car track and the Kaitoke reservoirs and recreational area. The meandering river occupied by small-scale farming activities. The river edge is densely vegetated with a channel provides several popular swimming holes along both sides of the reach. mix of exotic and indigenous trees and shrubs. Active erosion processes are evident in several places where floods have cut into the The river berm narrows and is constricted between SH2 and the river for about 800m gravel river cliffs, notably opposite the Te Marua Golf Course and just downstream of up to the Mangaroa River confluence and Te Marua Golf Club.
    [Show full text]
  • Hutt River Advisory Subcommittee Author Daya Atapattu, Team Leader, Western Fmps
    Report 10.458 Date 16 August 2010 File N/03/13/25 Committee Hutt River Advisory Subcommittee Author Daya Atapattu, Team Leader, Western FMPs Hutt River: 2011/12 works programme 1. Purpose To inform the Advisory Subcommittee of the Hutt River 2011/12 works programme. 2. Significance of the decision The matters for decision in this report do not trigger the significance policy of the Council or otherwise trigger section 76(3)(b) of the Local Government Act 2002. 3. Background The Hutt River Floodplain Management Plan (HRFMP) was completed in 2001. Greater Wellington’s policy is to fully implement the HRFMP by 2040. The total estimated cost of the HRFMP recommended structural works was $78 million ($1999). As at June 2010, about $20 million has been spent in implementing the HRFMP recommended works. The Flood Protection 2010 -2019 Operating plan provides a further $33 million to implement the HRFMP projects. 4. 2010-2019 Operating Plan The HRFMP projects programmed for completion by 2019 include; • Ebdentown rocklining by June 2011 (subject to NZTA funding) • Bridge Road edge protections by June 2011 • Boulcott Hutt stopbank project by 2013 • 10 year review of the HRFMP by 2013 • Maoribank riverbed stabilisation by 2015 WGN_DOCS-#822948-V1 PAGE 1 OF 3 • City Centre upgrade including channel improvements by 2019 Other Hutt valley projects programmed for completion by 2019 include; • Waiwhetu FMP and flood improvements by June 2012 • Pinehaven Flood Hazard study by June 2012 • Mangaroa Flood hazard assessment by 2018 5. 2010/11 works programme The 2010/11 annual plan provides a total of $4.3 million for implanting the HRFMP projects.
    [Show full text]
  • Mangaroa River Flood Hazard Assessment
    Mangaroa River Flood Hazard Assessment HYDRAULIC MODELLING REPORT: VOLUME 1 GW/FP-T-06/63 Final 20/3/07 Mangaroa River Flood Hazard Assessment HYDRAULIC MODELLING REPORT: VOLUME 1 GW/FP-T-06/63 Final 20/3/07 Sinclair Knight Merz Level 12, Mayfair House 54 The Terrace PO Box 10-283 Wellington New Zealand Tel: +64 4 473 4265 Fax: +64 4 473 3369 Web: www.skmconsulting.com Hydraulic Modelling Report Contents Executive Summary 1. Introduction 1 1.1 General 1 1.2 Scope of Modelling 1 2. River and Catchment Description 2 2.1 General Description 2 2.2 River Description 2 3. Hydraulic Modelling Concept 4 4. Survey and Data Collection 5 4.1 Topographic Data 5 4.2 Hydrologic Data 5 4.3 Water Level Boundary 5 4.4 Observed Water Level and Rating discharge 6 4.5 Assessment of Mangaroa Gauge Rating and Influence of Hutt Water Level 8 5. Hydraulic Modelling 10 5.1 Model Construction 10 5.2 Model Calibration and Validation 18 5.3 Design Scenarios 22 5.4 Results and Discussions 24 6. Flood Hazard Mapping 51 6.1 Mapping Introduction 51 6.2 Mapping Methodology 51 7. Summary, Conclusion and Recommendation 52 7.1 Recommendations 52 8. References 53 Appendix A Raw Model Results 54 SINCLAIR KNIGHT MERZ I:\Aenv\Projects\AE02482\Deliverables\AE02482W0006_ver3(final).doc PAGE i Hydraulic Modelling Report Document history and status Revision Date issued Reviewed by Approved by Date approved Revision type A 29/5/2006 CMM CMM 8/12/2005 Final Final 20/3/07 CMM CMM 20/3/07 Final (Updated RBL) Distribution of copies Revision Copy no Quantity Issued to Final 1 1 Phillip
    [Show full text]
  • Upper Hutt Local Services STANDARD & TARGETED LOCAL BUS ROUTES
    Effective from 25 October 2020 Upper Hutt Local services STANDARD & TARGETED LOCAL BUS ROUTES 111 112 114 115 113 Te Marua Totara Park Upper Hutt Riverstone Terraces Thanks for travelling with Metlink. Trentham Connect with Metlink for timetables Silverstream and information about bus, train and ferry services in the Wellington region. Pinehaven metlink.org.nz 0800 801 700 [email protected] Printed with mineral-oil-free, soy-based vegetable inks on paper produced using Forestry Stewardship Council® (FSC®) certified mixed-source pulp that complies with environmentally responsible practices and principles. Please recycle and reuse if possible. Before taking a printed timetable, check our timetables online or use the Metlink commuter app. GW/PT-G-20/50 October 2020 October GW/PT-G-20/50 THE PLATEAU FARE UPPER HUTT PARKDALE ZONE TE MARUA 112 State Highway 2 between 112 Emerald Hill and Te Marua 112 orth d N MOUNT MARUA oa R in BROWN Ma TOTARA PARK OWL TIMBERLEA Cannon Point Walkway Dr rnia ive lifo Ca 111 TIMBERLEA Kirton Dr TULSA PARK MAORIBANK Mo o 113 sman C Totara Park Road n in r s K h y RIVERSTONE TOTARA PARK in c e r H e 111 P TERRACES il RIVERSTONE SHOPS l Rd MAYMORN TERRACES River Kirton Dr Hutt River Road 112 M Gibbons St o o n Riverstone Drive s h in 111 e 113 Whakatiki St H Golders Rd i l l Fraser Cres R d River Rd 114 Kirton Dr MANGAROA Longfellow Street KINGSLEY 113 ROYAL STREET 111 Moonshine Rd 114 112 HEIGHTS Milton St UPPER HUTT 113 COLLEGE Thackeray Street 113 115 UPPER HUTT Martin Street STATION 111 112 113 114 115 Merton
    [Show full text]