Presented at NZ Hydrological Society Technical Workshop 17-20 March 2020
Over 500 years of water level measurement data are assessed to see which data do not meet the operational standards, have been compromised in some way, are synthetic or missing. The review included 26 audited Environment Canterbury sites covering a period from 1970 to 2019.
Fifteen years of this period achieve the water level standard, with five in the 1970s, three in the 1980s, one in the 1990s, three in the first 10 years of the new century and three in the last 10 years.
Sites with stilling wells had the highest chance of achieving the standard.
Graeme has over 48 years’ experience in hydrology, starting with 11 years measuring and processing hydrological information for the Ministry of Works and Development while based in field teams in Christchurch, Greymouth, Timaru, Lake Tekapo and Antarctica.
The following two and a half years completing hydrological analysis for hydro-electric design while at Power Investigations of the Ministry of Works and Development in Wellington.
Then, 22 years completing hydrological analysis for the North Canterbury Catchment Board and then Environment Canterbury, in a wide range of issues with a key role in water management investigations, analysis, allocation and plan formulation.
The following eight years were as an engineering hydrologist at NIWA providing consulting services to Regional Councils and the Government.
In the last four years Graeme established Graeme Horrell Consultancy Limited, providing consulting advice on a wide range of hydrology specialist areas and is an Adjunct Fellow of University of Canterbury.