1997-99: Project Director of the three-year, multi-million dollar contract for advising on environmental flows for river courses downstream of Lesotho Highland Water Projects dams. This project, employing 27 river scientists, social and health specialists and economists, resulted in the development and application of DRIFT, a new, scenario-based approach for flow assessments, that included a strong socio-economic component. Client: Lesotho Highland Development Authority.
1999: First author of thematic report on the Definition and Implementation of Environmental Flows. Client: World Commission on Dams.
1999: Report on Environmental Flow Assessments and Requirements. Co-author of Chapter 3 of a book on Water Resource Management in Southern Africa: Enhancing Environmental Sustainability. Client: Southern African Development Community and World Bank.
1999: First or second author of two comprehensive Technical Briefing Notes on environmental flows. Client: World Bank.
2001: Led trial application of a rapid DRIFT approach to environmental flow assessments in Zimbabwe (pungwe, Odzi and Shashe Rivers). Client: UK Department of International Development, via a contract to Mott MacDonald, UK.
2001: Ecological advisor on a project to develop a global water poverty index. Client: The British Department for International Development, via an award to the Centre for Ecology and Hydrology, Wallingford, U.K
2002: Consultant to the Lesotho Highlands Water Commission (combined Lesotho and South African authority) on the decision-making process and development of environmental policy for the rivers of the Lesotho Highlands Water Project.
2002: Reviewer of Queensland River Health Management Strategies. Client: Queensland Government, Australia.
2002: Review of the Report of the Expert Reference Panel on the Environmental Flows and Water Quality Requirements for the River Murray-Darling. Client: Murray-Darling Basin Commission, Canberra, Australia.
2003: One of seven authors of Environmental flows: the essentials. This is an introductory guide to environmental flows for countries wishing to start to use the approach in water-resource management. Client : IUCN.
2002: Lead author of five case studies of environmental flow applications in developing countries. Client: IUCN.
2004-11: Project leader and senior advisor to an IUCN-funded project on environmental water allocations for the Pangani Basin, northern Tanzania.
2008: Consultant ecologist on a World Bank multi-sectoral analysis of the Zambezi Basin. Client BRI.
2008 - 2010: Project Leader for an FAO-GEF-funded Environmental Flow Assessment of the Okavango River system, with capacity building in Botswana, Namibia and Angola. Clients: UN-FAO and BIOKAVANGO.
2009-2014: Appointed by the Government of Pakistan to lead an environmental flow assessment for the Kishenganga Dam in India on the Neelum River in Pakistan-controlled Kashmir.
2010: Consultant ecologist on a GTZ-funded project ‘Dam synchronisation and flood releases in the Zambezi River Basin’.
2012-2015: Appointed by the Government of Pakistan to lead an environmental flow assessment for the Neelum-Jhelum hydropower Dam on the Neelum River in Pakistan-controlled Kashmir.
2013-14: Scientific advisor to a communication project on the findings of the Okavango EFlows project: Developmjent of communication materials on TDA findings and SAP process. Client OKACOM.
2013: Lead consultant on establishing preliminary environmental flows for the Kafue Basin, Zambia. Used in water-resource planning for climate change. Funded by GFA Consulting Group, Germany.
2013-2014: Reviewer and overview consultant for an environmental flow assessment for the Gulpur Dam, Poonch River, Pakistan.
2013: Freshwater and river basin specialist in a pre-feasibility study into the augmentation of water supply to the central area of Namibia and the Cuvelai. For the Namibian Ministry of Agriculture, Water and Forestry.
2014: Invited lead author of chapter in book on Sustainable Hydropower in Asia for the Asian Development Bank.
2014-2015: Scientific advisor to a communication project “Development of Knowledge Management Products for the SADC GIZ Project on Mainstreaming Climate change”. Client SADC.
2015: Advisor to WWF on an integrated flow management plan for the Zambezi Basin.
2015: Lead consultant for WWF on EFlows for two major tributaries of the Zambezi River system: the Kafue Flats and Luangwa River.
2015: One of four authors of Good Practice Note for World Bank project managers on managing downstream flows of hydropower dams.
2016: Lead ecologist on World Bank funded Multi-sectoral Investment Opportunities Analysis for the Okavango Basin.
2017: Ecological Lead on an EU-funded project “Technical assistance for the programme for transboundary water management in the Cubango-Okavango River Basin.
2018: Development of the Luangwa Basin Configuration Model and User Manual (WWF-Zambia)
2018: Rapid EFlows Assessment for the Lower Kafue Sub-Catchment (GIZ, Zambia)
1987: Siting of the new N1 Freeway through Du Toit's Kloof: impacts upon rivers. Client: Hill, Kaplan, Scott & Partners, Consulting Engineers, Cape Town.
1987: The Agulhas vleis: siting of the proposed nuclear power station. Client: ESCOM.
1988: The Blinde River: an assessment of the likely effects of discharging waste waters from the planned Mossel Bay Oil Refinery. Client: Hill, Kaplan, Scott, Durban.
1988: The Agulhas wetlands: second site-specific assessment of proposed sites for new nuclear power plant. Client: ESCOM.
1988: The Gouriqua wetlands: their conservation status. Client: Atomic Energy Corporation.
1989: Assessments of the likely effects of discharging treated sewage effluent into Hermanus Lagoon. Client: Hermanus Muncipality.
1991: Investigation of the impact of the proposed road on the lower reaches of the Silvermine River and on wetlands in proximity to the road. Specialist report for the Environmental Impact Assessment of the Fish Hoek bypass road. Client: Hill, Kaplan, Scott, Consulting Engineers.
1995: Design phase of a national aquatic ecosystem biomonitoring programme. Client: Institute of Water Quality Studies, DWAF.
1995: Bulk water estimate of the environmental flow requirements for the Molenaars River. Client: Ninham Shand Engineers.
1995: Inventory and status assessment of wetlands at Rein’s nature reserve. Client: Dennis Moss and Associates.
1995: Refinement of the instream flow assessment for the Berg River. Client: Ninham Shand Engineers.
1991-97: Member of Environmental Management Team, with special responsibility for protection of the Molenaars River, during contruction of the new N1 freeway through Dutoit’s Kloof. Client: National Department of Transport.
1995-96: Overview consultant on the design phase of a national biomonitoring network for South African inland waters. Client: Department of Water Affairs and Forestry (Institute of Water Quality Studies).
1996: Principal researcher for and author of the discussion paper Quantifying the amount of water required for maintenance of aquatic ecosystems, for the national Water Law review. Client: Department of Water Affairs and Forestry.
1996: Facilitator at the National Consultation Planning Meeting for a national biomonitoring network for South African inland waters. Client: Department of Water Affairs and Forestry (Institute of Water Quality Studies).
1996: Consultant at workshop to develop a conceptual IFR algorithm for water-resource models. Client: BKS Inc. Engineers and Project Managers.
1997: Scientific advisor on the implementation phase of a national biomonitoring network for South African inland waters. Client: Department of Water Affairs and Forestry (Institute of Water Quality Studies.
1996: Bulk water estimate of the enviromental flow requirements for the Malibamatso River, Lesotho. Client: Lesotho Highlands Development Authority.
1996: Bulk water estimate of the enviromental flow requirements for the Nkomati River. Client: Steffen, Robertson and Kirsten Inc.
1997: Hout Bay River - development of housing complex in lower reaches. Client: Plan Trust Developments.
1997: The Olifants-Doring Basin study. Client: Department of Water Affairs and Forestry.
1997-98: The Palmiet River instream flow requirements. Client: Department of Water Affairs and Forestry.
2001: Olifants River Fish Survey. Client: Department of Water Affairs and Forestry.
2007-08: Joint editor of a multi-authored Water Research Commission Technical Report: South African Handbook on Environmental Hydraulics
2008-11: Situation Assessment of the South African Reserve of water for Basic Human Needs and ecological maintenance of inland aquatic ecosystems. Clients: South African Department of Water Affairs, WWF and the South African Water Research Commission.