Australia is not only the driest continent, but its streams are among the most variable in the world. To date in Australia there has been no large-scale study of Australia’s low flow hydrologic characteristics, and consequently there is a fundamental need to develop methods that can be readily used to assess the hydrology during times of low flow. This thesis describes the development and derivation of a methodology for the estimation of low flow characteristics and yield in small ungauged rural catchments. The methodology has been applied to 184 catchments located in New South Wales and Victoria, in south-eastern Australia. A systems approach was adopted in which multivariate techniques were used to develop relationships between low flow parameters and climatic and land information data. The low flow and yield parameters considered include: descriptive statistics of monthly and annual flows, ratio of baseflow to total streamflow volumes, streamflow recession constants, flow duration curves for daily, monthly and annual durations, low flow frequency curves for durations from 1 to 284 days, duration of low flow spells below a given threshold, deficiency volume of low flow spells below a given threshold, estimate of storage to satisfy a specified draft at a given level of reliability, and parameters of a simple rainfall-runoff model for conversion of daily rainfall to monthly streamflow volumes.
| Identifer | oai:union.ndltd.org:ADTP/245407 |
| Creators | Nathan, Roderic John |
| Source Sets | Australiasian Digital Theses Program |
| Language | English |
| Detected Language | English |
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