An assessment of anthropogenic and climatic stressors on estuaries using a spatio-temporal GIS-modelling approach for sustainability: Towamba estuary, southeastern Australia
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Monitoring estuarine ecological-geomorphological dynamics has become a crucial aspect of studying the impacts of climate change and worldwide infrastructure development in coastal zones. Together, these factors have changed the natural eco-geomorphic processes that affect estuarine regimes and comprehensive modelling of coastal resources can assist managers to make appropriate decisions about their sustainable use. This study has utilised Towamba estuary (southeastern NSW, Australia), to demonstrate the value and priority of modelling estuarine dynamism as a measure of the rates and consequences of eco-geomorphic changes. This research employs several geoinformatic modelling approaches over time to investigate and assess how climate change and human activities have altered this estuarine eco-geomorphic setting. Multitemporal trend/change analysis of sediment delivery, shoreline positions and land cover, determined from fieldwork and GIS analysis of remote sensing datasets, shows significant spatio-temporal changes to the elevation and areal extent of sedimentary facies in the Towamba estuary over the past 65 years. Geomorphic growth (~ 2600 m2 annually) has stabilised the estuarine habitats, particularly within native vegetation, salt marsh and mangrove areas. Geomorphic changes have occurred because of a combination of sediment runoff from the mostly unmodified terrestrial catchment, nearshore processes (ocean dynamics) and human activities. The construction of GIS models, verified with water and sediment samples, can characterise physical processes and quantify changes within the estuarine ecosystem. Such robust models will allow resource managers to evaluate the potential effects of changes to the current coastal ecosystems.
KeywordsGeoinformatics Global warming Eco-geomorphology monitoring Sediment sampling Coastal management
Comments and support from Collin Murray-Wallace and Craig Sloss that improved an early version of this manuscript were highly appreciated.
The GeoQuEST Research Centre, University of Wollongong, and HCED-Iraq scholarship program, Baghdad, Iraq are thanked for financing and supporting this research as part of a PhD project undertaken by the first author.
- ABS (Australian Bureau of Statistics) (2017). Available online: http://www.abs.gov.au/. Accessed 17 Nov 2017.
- Al-Nasrawi, A. K. M., Hamylton, S. M., Jones, B. G., & Kadhim, A. A. (2018). Geoinformatic analysis of vegetation and climate change on intertidal sedimentary landforms in southeastern Australian estuaries from 1975–2015. AIMS Geosciences, 4(1), 36–65. https://doi.org/10.3934/geosci.2018.1.36.CrossRefGoogle Scholar
- Al-Nasrawi, A. K. M., Hamylton, S. M., Jones B. G., Hopley C. A., & Al Yazichi Y. M. (2018b). Geoinformatics vulnerability predictions of coastal ecosystems to sea-level rise in southeastern Australia. Geomatics, Natural Hazards and Risk, 9(1), 645–661. https://doi.org/10.1080/19475705.2018.1470112.CrossRefGoogle Scholar
- Al-Nasrawi, A. K. M., Jones, B. G., Alyazichi, Y. M., Hamylton, S. M., Jameel, M. T., & Hammadi, A. F. (2016a). Civil-GIS incorporated approach for water resource management in a developed catchment for urban-geomorphic sustainability: Tallowa Dam, southeastern Australia. International Soil and Water Conservation Research, 4, 303–313. https://doi.org/10.1016/j.iswcr.2016.11.001.CrossRefGoogle Scholar
- ALUM (Australian Land Use and Management) (2010). Classification Version 7 (Geo-datasets). Canberra: Geoscience Australia.Google Scholar
- Batzer, D. P., & Sharitz, R. R. (2014). Ecology of freshwater and estuarine wetlands. Los Angeles: University of California Press.Google Scholar
- Blay, J. (1944). On track: searching out the Bundian way, Eden local history reference collection. Sydney: NewSouth Publishing.Google Scholar
- Blott, S. J. (2010). A package of grain size distribution and statistics for the analysis of unconsolidated sediments by sieving or Laser Granulometer-GRADISTAT V.8.0.Google Scholar
- BOM (2017). NSW weather [online]. Australian Government, Bureau of Meteorology. Available: http://www.bom.gov.au.
- Bouvet, M. (2004). The Holocene evolution of Swan Lake. BSc (Hons) thesis, University of Wollongong, Australia.Google Scholar
- Carter, V. (1999). Technical aspects of wetlands (wetland hydrology, water quality, and associated functions) [online]. Available: http://water.usgs.gov/nwsum/WSP2425/hydrology.html.
- Chenhall, B. E., Jones, B. G. & Depers, A. M. (2001). Trace metal pollution and sedimentation in coastal lagoons: an example from Lake Illawarra, New South Wales, Australia. In V.A. Gostin (ed.), Gondwana to greenhouse: Australian environmental geoscience, (Vol. 21, pp. 227–233). Geological Society of Australia Special Publication.Google Scholar
- Chenhall, B. E., Jones, B. G., Sloss, C. R., O’Donnell, M., Payne, M., Murrie, M., Garnett, D., & Waldron, H. (2004). Trace metals in sediments from Lake Illawarra, New South Wales, Australia. Wetlands (Australia), 21, 198–208.Google Scholar
- Coleman, J.M., & Wright, L., (1975). Modern river deltas: Variability of processes and sand bodies. In M.L. Broussard (Ed.), Deltas, Models for Exploration (pp. 99–149). Houston: Houston Geological Society.Google Scholar
- DPI/OW (2017). Towamba catchment [online]. Department of Primary Industries / Office of Water. Available: http://www.water.nsw.gov.au/water-management/basins-and-catchments/towamba-catchment.
- DSE (2007). Index of wetland condition: (review of wetland assessment methods). Melbourne: Department of Sustainability and Environment, Victorian Government.Google Scholar
- FAO (2003). Status and trends in mangrove area extent worldwide. In M. L. Wilkie & S. Fortuna (Eds.), Forest Resources Assessment Working Paper (p. 63). Rome: Forest Resources Division. FAO.Google Scholar
- Herben, R., Khoury, M., Rolfe, D., Wilkie, S., Wynn, K., & Collins, R. (2012). Interpreting estuary health data, EstuaryWatch Victoria. Melbourne: Corangamite Catchment Management Authority.Google Scholar
- Hopley, C. A. (2004). The Holocene and beyond: evolution of Wandandian Creek delta, St Georges Basin. BSc (Hons) thesis, University of Wollongong, Australia.Google Scholar
- Hopley, C. A. (2013). Autocyclic, allocyclic and anthropogenic impacts on Holocene delta evolution and future management implications: Macquarie Rivulet and Mullet/Hooka Creek, Lake Illawarra, New South Wales. PhD thesis, University of Wollongong, Australia.Google Scholar
- Hudson, J. P. (1991). Late Quaternary evolution of Twofold Bay, southern New South Wales. MSc. thesis, University of Sydney (unpublished).Google Scholar
- Ian, H. (2013). Coast: a history of the New South Wales edge. Sydney: University of New South Wales Press.Google Scholar
- IPCC (2014) Climate change 2014: synthesis report. In R. K., Pachauri & L. A., Meyer (Eds.), Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Core Writing Team,] (pp. 151). Geneva: IPCC.Google Scholar
- Jones, B. G., Killian, H. E., Chenhall, B. E., & Sloss, C. R. (2003b). Anthropogenic effects in a coastal lagoon: geochemical characterisation of Burrill Lake, NSW, Australia. Journal of Coastal Research, 19, 621–632.Google Scholar
- Krumbein, W., & Pettijohn, F. (1938). Manual of sedimentary petrography (p. 549). New York: Appleton-Century Co.Google Scholar
- LP-DAAC (Land Processes-Distributed Active Archive Centre) (2017). DEMs data sets, NASA land data products and services; USGS [online]. Available: https://lpdaac.usgs.gov/.
- LPI (Land and Property Information) (1998). Historical data. Sydney: New South Wales Government.Google Scholar
- LPI, (NSW Land and Property Information) (2010). Standard imagery product (RCD105 imagery), version 2.0, July 2010. Sydney: Land and Property Information.Google Scholar
- LPI, (NSW Land and Property Information) (2014). Imagery survey. Sydney: Land and Property Information.Google Scholar
- Mkpenie, V. N., Ebong, G. & Abasiekong, B. (2007). Studies on the Effect of Temperature on the Sedimentation of Insoluble Metal Carbonates. Journal of Applied Sciences and Environmental Management, 11(4), 67–69.Google Scholar
- Panayotou, K., Woodroffe, C. D., Jones, B. G., Chenhall, B. E., McLean, E., & Heijnis, H. (2007). Patterns and rates of sedimentary infill in the Minnamurra River estuary, south-eastern Australia. Journal of Coastal Research Special Issue, 50, 688–692.Google Scholar
- Pendleton, L. H. (2010). The economic and market value of coasts and estuaries: what’s at stake? (pp. 1–175). Arlington, USA: Restore America's Estuaries.Google Scholar
- Postgate, N. (1992). Early Mesopotamia: society and economy at the dawn of history (book review). London: Oxford University Press.Google Scholar
- Saintilan, N., & Williams, R. (2010). The decline of saltmarsh in southeast Australia: results of recent surveys. Wetlands (Australia), 18, 49–54.Google Scholar
- Sloss, C. R., Jones, B. G., Murray-Wallace, C. V., & McClennen, C. E. (2005). Holocene sea level fluctuations and the sedimentary evolution of a barrier estuary: Lake Illawarra, New South Wales. Australia. Journal of Coastal Research, 21(943–959), 974–975.Google Scholar
- Sloss, C. R., Jones, B. G., Murray-Wallace, C. V., & Chenhall, B. E. (2004). Recent sedimentation and geomorphological changes, Lake Illawarra, NSW, Australia. Wetlands (Australia), 21, 73–83.Google Scholar
- SOC (2010). Riverine ecosystems, southern river region. State of the Catchments, New South Wales Government, Sydney.Google Scholar
- SpatialServices-NSDC (2017). The NSW spatial data catalogue. Sydney: New South Wales Government.Google Scholar
- SRTM (Shuttle Radar Topographic Mission) (2011). Geoscience Australia product (arc second DSM, DEM, DEM-S & DEM-H- Version 1.0.4). Canberra: © Commonwealth of Australia (Geoscience Australia).Google Scholar
- Thieler, E. R., Himmelstoss, E. A., Zichichi, J. L., & Ergul, A. (2009). The Digital Shoreline Analysis System (DSAS) version 4.0—an ArcGIS extension for calculating shoreline change. US Geological Survey, Open-File Report2008–1278.Google Scholar
- Troedson, A., Hashimoto, T. R., Jaworska, J., Malloch, K., & Cain, L. (2004). Coastal Quaternary Geology (CCA 03), Comprehensive Coastal Assessment. New South Wales: Department of Planning.Google Scholar
- USGS-LANDSAT (2016). Landsat collections [online]. Available: http://landsat.usgs.gov//landsatcollections.php.
- Venter, O., Sanderson, E. W., Magrach, A., Allan, J. R., Beher, J., Jones, K. R., Possingham, H. P., Laurance, W. F., Wood, P., & Fekete, B. M. (2016). Sixteen years of change in the global terrestrial human footprint and implications for biodiversity conservation. Nature Communications, 7, 12558.CrossRefGoogle Scholar
- Woodroffe, C. D., Panayotou, K., Simms, A. D., & Jones, B. G. (2004). The rate of sedimentary infill in Australian estuarine systems: examples from southern New South Wales, Australia. ECSA37 - ERF 2004 Estuaries and Change Conference, Ballina, 20-24, 290.Google Scholar
- Woodroffe, C. D., Buman, M., Kawase, K., & Umitsu, M. (2000). Estuarine infill and formation of deltaic plains, Shoalhaven River. Wetlands (Australia), 18(2), 72–84.Google Scholar
- Yassini, I., & Jones, B. G. (1995). Foraminiferida and ostracoda from estuarine and shelf environments on the southeastern coast of Australia (p. 484). Wollongong: University of Wollongong Press.Google Scholar