Climate change impacts on the hydrology of Aldgate and Inverbrakie Creeks in South Australia
Paper
Chowdhury, R. K. and Beecham, S.. 2012. "Climate change impacts on the hydrology of Aldgate and
Inverbrakie Creeks in South Australia." Daniell, Katherine A (ed.) Water and Climate: Policy Implementation Challenges - 2nd Practical Responses to Climate Change Conference 2012. Canberra, Australia 01 - 03 May 2012 Canberra, Australia.
| Paper/Presentation Title | Climate change impacts on the hydrology of Aldgate and |
|---|---|
| Presentation Type | Paper |
| Authors | Chowdhury, R. K. (Author) and Beecham, S. (Author) |
| Editors | Daniell, Katherine A |
| Journal or Proceedings Title | Water and Climate: Policy Implementation Challenges; Proceedings of the 2nd Practical Responses to Climate Change Conference |
| ERA Conference ID | 80815 |
| Number of Pages | 10 |
| Year | 2012 |
| Place of Publication | Canberra, Australia |
| ISBN | 9780858259119 |
| Web Address (URL) of Paper | https://search.informit.com.au/documentSummary;dn=892732527690969;res=IELENG |
| Conference/Event | Water and Climate: Policy Implementation Challenges - 2nd Practical Responses to Climate Change Conference 2012 |
| Event Details | Water and Climate: Policy Implementation Challenges - 2nd Practical Responses to Climate Change Conference 2012 Event Date 01 to end of 03 May 2012 Event Location Canberra, Australia |
| Abstract | Hydrological projections are essential for the development of climate change adaptation strategies in water resources management. Generally three steps are followed: (1) GCMs are used to predict scenarios of climate variables; (2) an appropriate downscaling technique is used to generate catchment-scale climate projections from the GCM outputs; and (3) a calibrated hydrological model is applied for hydrological scenario development. In this study, climate change impacts on the hydrological regime of two sub-catchments located within the Onkaparinga River catchment in South Australia have been examined. The selected sub-catchments are Aldgate Creek (a perennial creek catchment, of area 7.9 km2 ) and Inverbrakie Creek (an ephemeral creek catchment, of area 8.4 km2 ). Ensembles of daily rainfall scenarios were generated from 2010 to 2030 using a transitional probability matrix model. The SIMHYD conceptual hydrological model was calibrated and validated for both catchments using historical daily rainfall and flow records. Each replicate of generated rainfall represents an equally likely scenario, which was then fed into the SIMHYD model for the generation of hydrological scenarios. Standard hydro-statistical parameters were calculated for the assessment of impacts on creek hydrology. These parameters were divided into categories of low flow, medium flow and high flow. A drier future has been projected for both catchments. Except for March and April, the Aldgate Creek sub-catchment exhibited reductions in flow volumes for all months whereas the Inverbrakie Creek catchment exhibited increased flow volumes during low flow months. Projected decreased peak flows were observed for both catchments. A wide range of variability and uncertainty in projected hydrological characteristics was observed. It was shown that the projections of hydrological impacts differ across the two sub-catchments, even when they are located in the same region. Finally, the importance of developing catchment-scale climate change adaptation strategies is emphasized. |
| ANZSRC Field of Research 2020 | 400513. Water resources engineering |
| Public Notes | © 2012 Engineers Australia |
| Byline Affiliations | United Arab Emirates University, United Arab Emirates |
| University of South Australia | |
| Institution of Origin | University of Southern Queensland |
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