David Leong - Appendix 1 - Environment Canterbury
David Leong - Appendix 1 - Environment Canterbury
David Leong - Appendix 1 - Environment Canterbury
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TONKIN & TAYLOR LTD<br />
<strong>Environment</strong>al and Engineering Consultants<br />
• New Plymouth Catchments Stormwater Management Plan<br />
New Plymouth District Council, 2001-2002<br />
Project Manager and Senior Hydrologist/Hydraulic Engineer<br />
Responsible for detailed stormwater study and modelling of the Waimea, Huatoki and Mangaotuku Stream<br />
catchments in New Plymouth District, with a focus on the effectiveness of flood detention storage, both<br />
existing and potential, on the performance of the trunk stormwater drainage systems.<br />
• Wairoa Canal Development<br />
Synergine Operations Ltd, 2003<br />
Senior Hydraulic Engineer/Hydrologist<br />
Review of flood flow estimates for the lower Wairoa River (near Clevedon) and estimation of the design<br />
flood level for a residential canal development in a tidal reach of the river, including an assessment of the<br />
hydraulic effects of the development on the floodplain.<br />
• Lakes Wakatipu and Wanaka Design Wave Height Assessment<br />
Otago Regional Council, 2007-2008<br />
Senior Hydrologist<br />
Assessment of wind conditions during elevated lake levels for developing a joint statistical probability<br />
distribution. The analysis enables the wave contribution to extreme water levels in Lakes Wanaka and<br />
Wakatipu to be determined.<br />
• Infrastructure Auckland Funding Applications<br />
Auckland City Council, 2003-2004<br />
Senior Engineer<br />
Assisted in the preparation of funding applications on behalf of Auckland City and Metrowater for<br />
stormwater capital works, including treatment, system upgrading and sewer separation, for Pt Chevalier,<br />
Motions Creek, Upland and Orakei sub-catchments with a combined value of $130 million. Involved costbenefit<br />
analysis, including economic, environmental and social parameters, based on a 20-year timeframe.<br />
• Bowden Road Gross Pollutant Trap<br />
Auckland City Council, 2002-2003 & 2006<br />
Senior Engineer / Hydrologist<br />
Conceptual design of a gross pollutant trap on the Bowden Road stream (Mt Wellington, Auckland) for<br />
removal of trash and sediment from the streamflow before discharge to the coastal marine area. Options<br />
investigated included an innovative vortex tube device in addition to a conventional basin design.<br />
Subsequently involved in technical advisory role during detailed design and construction.<br />
• Kuala Lumpur International Airport Flood Studies<br />
HSS Integrated<br />
Senior Hydrologist<br />
Conducted flood studies and conceptual drainage studies for the proposed new international airport in<br />
Sepang, Malaysia. Involved detailed audit of Sungai Langat water level and stage-discharge rating data<br />
obtained from JPS (TIDEDA data), and rainfall-runoff modelling to derive design flood hydrographs<br />
allowing for different levels of future urban development.<br />
• Lower Tongariro River Flood & Erosion Hazard Management Plan<br />
<strong>Environment</strong> Waikato<br />
Senior Hydrologist / Hydraulic Engineer<br />
Responsible for hydraulic modelling and regime analysis of the Lower Tongariro River for a<br />
comprehensive flood and erosion hazard management plan for the lower river including Turangi township,<br />
including design of rock revetments.<br />
• Otaki Flood Detention Dam Study<br />
Wellington Regional Council<br />
Senior Engineer and Hydrologist<br />
Pre-feasibility evaluation of several large flood detention dam options (25 m to 50 m high) in the Otaki<br />
area near Wellington, including costings. The brief included assessment of a 60 m high multi-purpose<br />
hydro-flood control dam option of the Otaki River.<br />
12<br />
<strong>David</strong> <strong>Leong</strong>
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