David Leong - Appendix 1 - Environment Canterbury

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TONKIN & TAYLOR LTD Environmental and Engineering Consultants • Auckland Future Bulk Water Supply Options Study Auckland Regional Council, 1995 Senior Hydrologist As part of the 1995 study of future bulk water supply options for Auckland, evaluated the water resources and dry weather flows from small streams in the greater Auckland Region for a variety of drought standards and residual flow options. • Blowing Point Dam Feasibility Mid-Canterbury Irrigation Enhancement Society Senior Hydrologist / Hydraulic Engineer Assessed, to feasibility level, the hydrology of the South Ashburton River dam option (130 million m 3 storage) to augment irrigation supply from Rangitata Diversion Race. Potential hydropower from the proposed dam and augmentation of the energy output from the Highbank Power Station were also investigated. • Mangakahia River Irrigation Consents Mangakahia Irrigation Committee, 1992-1994 Project Manager and Hydrologist / Hydraulic Engineer Managed a study of low flows and environmental effects for proposed large scale pasture irrigation in the Mangakahia River catchment, Northland. Presented expert evidence in the consent hearing and, subsequently, in the Planning Tribunal in support of applications to extract water. Landmark decision subsequently awarded in applicants’ favour. • Kakanui / Waiareka River Irrigation Study Senior Hydrologist Responsible for hydrological analysis and dam storage modelling for the Kakanui/Waiareka River irrigation project (Otago) to establish storage requirements and sensitivity to residual flow criteria. Onriver storage, off-river diversion storage and pumped diversion scheme options were investigated. Hydro-electric Power Patea Hydroelectric Power Scheme Re-consenting TrustPower Limited, 2005–2008 Senior Hydrologist Responsible for hydrological investigations and effects assessment in support of the application to renew consents for this 65m high dam which has a 31MW power station on the Patea River in Taranaki. Review of flood hydrology, the Probable Maximum Flood (PMF) and capacity of spillways. Dambreak hazard assessment and mapping for both flood-induced failure and sunny-day failure. Review of historical operation and consent compliance, and effects of daily peaking on river flow regime. Project Aqua Meridian Energy, 2000–2004 Team Leader Hydrology and Hydraulics Project Aqua is a cascade-type hydroelectric power scheme based on the Waitaki River, with an innovative low profile river intake, 64 km of canals and six power stations. The design flow is 340 m 3 /s with generation capacity of 530 MW, and an annual output of about 3200 GWh. Project responsibilities (at preliminary design phase) included: - Co-ordination of all hydrological and hydraulic design aspects - River intake, canal intake and river outfall design - Hydrology and assessment of long term flow trends - Morphological aspects at river intake and outfalls, and assessment of bed and suspended load - Preliminary assessment of hydroenergy output and peaking potential - Assessment of overall scheme hydraulics, including transient conditions, and headlosses - Interaction with various environmental consultants, particularly with regard to fish and habitat protection, and with Electrical & Mechanical consultants. 4 David Leong
TONKIN & TAYLOR LTD Environmental and Engineering Consultants Vaita’i Hydropower Scheme, Samoa Asian Development Bank, 2007 Senior Hydrologist Responsible for data interpretation, hydrological analysis and derivation of flow duration data for 1.8 MW run-of-river scheme in the island of Savai’i, Samoa. Wahapo Hydroelectric Power Scheme Re-consenting TrustPower Limited, 2007–2008 Senior Hydrologist Responsible for hydrological investigations and effects assessment in support of the application to renew consents for this 3.1 MW hydro-electric power scheme in South Westland. Ambuklao and Binga Hydroelectric Power Scheme Remediation Project SN Aboitiz Power (Philippines), 2008 Team Leader and Senior Hydrologist/Hydraulic Engineer Responsible for preparation of the Operation, Maintenance and Surveillance Manual for the 75 MW Ambuklao scheme which includes a 130 high dam and the 100 MW Binga scheme which includes a 107 m high dam, both on the Agno River in Luzon, Philippines. Responsible also for drafting the Emergency Action Plan for these two dams which are in cascade, and dambreak hazard assessment and mapping. Review of the Probable Maximum Flood for Binga Dam (11,600 m 3 /s) and adequacy of its gated spillway. Pantabangan Dam Flood Review FirstGen (Philippines), 2008 Senior Hydrologist Detailed review of flood hydrology and the Probable Maximum Precipitation (PMP) and Probable Maximum Flood (PMF) for this 107 m high irrigation and hydropower dam on the Pampanga River in central Luzon (Philippines). The dam’s reservoir has a live storage capacity of 1750 million m 3 and a peak inflow in excess of 12,000 m 3 /s. Angat Dam 1 st Phase Due Diligence Manila Oslo Renewable Energy (Philippines), 2008 Senior Hydrologist Assessment of flood hydrology and spillway adequacy for this 130 m high water supply, irrigation and hydro-electric power dam, and scoping of remedial works and potential enhancement options. North Bank Tunnel Concept, Waitaki River Environment Canterbury, 2007 Peer Reviewer Review of the hydrological effects from the proposed take, use and discharge up to 260 m 3 /s of water from the Waitaki River for hydroelectricity generation via this tunnel-based scheme proposed by Meridian Energy. Opuha Dam Doug Hood Ltd, 1995-1997 Senior Hydrologist/Hydraulic Engineer Responsible for detailed hydraulic design of spillways, tailrace excavation and hydraulic structures for 50 m high combined irrigation and hydro (7.5 MW) dam on the Opuha River, South Canterbury. Also responsible for hydro-energy modeling and output evaluation, and involved in planning operational strategy. Aratiatia Power Station Mighty River Power Ltd, 1997 Project Manager and Senior Engineer Designed remedial works, prepared contract documents and managed construction contract for repair of erosion damage to left bank of the tailrace of the 80 MW Aratiatia Power Station. Concurrently also responsible for contract for dredging accumulated sediment in the upstream river channel and intake forebay of the power station. 5 David Leong
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David Leong - Appendix 1 - Environment Canterbury

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