- Title
- The impact of east coast lows (ECL) on eastern Australia's hydroclimate: do we need to consider sub-categories of ECLs?
- Creator
- Kiem, Anthony S.; Twomey, Callum; Lockart, Natalie; Willgoose, Garry; Kuczera, George
- Relation
- 36th Hydrology and Water Resources Symposium: The Art and Science of Water(HWRS2015). Proceedings of the 36th Hydrology and Water Resources Symposium (Hobart, Tas. 7-10 December, 2015) p. 1569-1576
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2015
- Description
- East Coast Lows (ECLs) are intense low-pressure systems which occur over the subtropical east coasts of Southern Hemisphere continents, including Australia. These systems are typically associated with gale-force winds, large seas, storm surges, heavy rainfall and flooding. While these ECL impacts are mostly negative the rainfall associated with ECLs is also very important for urban water security within the heavily populated eastern seaboard of Australian (ESA). This study examines historical ECLs to gain insights into the timing, frequency and location of ECL occurrence as well as the magnitude and spatial extent of ECL impacts on rainfall. The different characteristics and impacts associated with the different ECL sub-types are highlighted and it is demonstrated how this information can be used to stochastically simulate daily rainfall such that the statistics important for catchment scale hydrology (e.g. clustering of extreme events, long-term persistence, frequency/duration/magnitude of wet and dry spells etc.) are realistically preserved. These simulated rainfall sequences, that incorporate the spatial and temporal hydroclimatic variability caused by ECLs and other climate phenomena, are important inputs into hydrological models used to determine current and future urban water security.
- Subject
- East Coast Lows; hydroclimate; impacts; water security
- Identifier
- http://hdl.handle.net/1959.13/1330854
- Identifier
- uon:26491
- Identifier
- ISBN:9781922107497
- Language
- eng
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