Droughts, floods and freshwater ecosystems: evaluating climate change impacts and developing adaptation strategiesAllison Aldous A E , James Fitzsimons B C , Brian Richter D and Leslie Bach A
A The Nature Conservancy, 821 SE 14th Avenue, Portland, OR 97214, USA.
B The Nature Conservancy, Suite 3-04, 60 Leicester Street, Carlton, Vic. 3053, Australia.
C School of Life and Environmental Sciences, Deakin University, 211 Burwood Highway, Burwood, Vic. 3125, Australia.
D The Nature Conservancy, 490 Westfield Road, Charlottesville, VA 22901, USA.
E Corresponding author. Email: email@example.com
Marine and Freshwater Research 62(3) 223-231 http://dx.doi.org/10.1071/MF09285
Submitted: 9 November 2009 Accepted: 10 May 2010 Published: 18 March 2011
Climate change is expected to have significant impacts on hydrologic regimes and freshwater ecosystems, and yet few basins have adequate numerical models to guide the development of freshwater climate adaptation strategies. Such strategies can build on existing freshwater conservation activities, and incorporate predicted climate change impacts. We illustrate this concept with three case studies. In the Upper Klamath Basin of the western USA, a shift in land management practices would buffer this landscape from a declining snowpack. In the Murray–Darling Basin of south-eastern Australia, identifying the requirements of flood-dependent natural values would better inform the delivery of environmental water in response to reduced runoff and less water. In the Savannah Basin of the south-eastern USA, dam managers are considering technological and engineering upgrades in response to more severe floods and droughts, which would also improve the implementation of recommended environmental flows. Even though the three case studies are in different landscapes, they all contain significant freshwater biodiversity values. These values are threatened by water allocation problems that will be exacerbated by climate change, and yet all provide opportunities for the development of effective climate adaptation strategies.
Additional keywords: climate adaptation strategies, coupled climate–hydrology models, dam reoperation, environmental flows, groundwater, groundwater-dependent ecosystems, land management, surface water.
ReferencesAdam, J. C., Hamlet, A. F., and Lettenmaier, D. P. (2009). Implications of global climate change for snowmelt hydrology in the 21st century. Hydrological Processes 23, 962–972.
| Implications of global climate change for snowmelt hydrology in the 21st century.CrossRef |
Ballinger, A., and Mac Nally, R. (2006). The landscape context of flooding in the Murray–Darling Basin. Advances in Ecological Research 39, 85–105.
| The landscape context of flooding in the Murray–Darling Basin.CrossRef |
Bates, B. C., Kundzewicz, Z. W., Wu, S., and Palutikof, J. P. (Eds) (2008). Climate change and water. Technical Paper of the Intergovernmental Panel on Climate Change, IPCC Secretariat, Geneva.
Brook, B. W., Sodhi, N. S., and Bradshaw, C. J. A. (2008). Synergies among extinction drivers under global change. Trends in Ecology & Evolution 23, 453–460.
| Synergies among extinction drivers under global change.CrossRef |
Brown, J. B., Bach, L. B., Aldous, A. R., Wyers, A., and DeGagné, J. (2010). Groundwater-dependent ecosystems in Oregon: an assessment of their distribution and associated threats. Frontiers in Ecology and the Environment , .
| Groundwater-dependent ecosystems in Oregon: an assessment of their distribution and associated threats.CrossRef |
Carlson, J. R. (1993). The evaluation of wetland changes around Upper Klamath Lake, Oregon, using multitemporal remote sensing techniques. In ‘Environmental Research in the Klamath Basin, Oregon – 1991 Annual Report’. Bureau of Reclamation Report # R-93–13. (Ed. S. G. Campbell.) pp. 197–202. (Bureau of Reclamation: Denver, CO.)
Chiew, F. H. S. (2006). An overview of methods for estimating climate change impact on runoff. In ‘Proceedings of the 30th Hydrology and Water Resources Symposium: Past, Present and Future, 4–7 December 2006, Launceston, Tasmania’. pp. 643–648. (Engineers Australia: Canberra.)
Davies, P. E., Harris, J. H., Hillman, T. J., and Walker, K. F. (2008). SRA report 1: a report on the ecological health of rivers in the Murray–Darling Basin, 2004–2007. Prepared by the Independent Sustainable Rivers Audit Group for the Murray–Darling Basin Ministerial Council. Murray–Darling Basin Commission, Canberra.
Döll, P. (2009). Vulnerability to the impact of climate change on renewable groundwater resources: a global-scale assessment. Environmental Research Letters 4, 1–12.
| Vulnerability to the impact of climate change on renewable groundwater resources: a global-scale assessment.CrossRef |
DSE (2008). Northern region sustainable water strategy discussion paper. Department of Sustainability and Environment, Melbourne.
Fitzsimons, J. A. (2006). Public land use planning using bioregions and other attributes: determining the study area of the VEAC River Red Gum Forests investigation. Proceedings of the Royal Society of Victoria 118, 75–85..
Folke, C., Carpenter, S., Walker, B., Scheffer, M., Elmqvist, T., et al. (2004). Regime shifts, resilience, and biodiversity in ecosystem management. Annual Review of Ecology Evolution and Systematics 35, 557–581.
| Regime shifts, resilience, and biodiversity in ecosystem management.CrossRef |
Gannett, M. W., Lite, K. E., LaMarche, J. L., Fisher, B. J., and Polette, D. J. (2007). Ground-water hydrology of the Upper Klamath Basin, Oregon and California. US Geological Survey Scientific Investigations Report 2007–5050. US Geological Survey, Portland, OR.
Holling, C. S. (1973). Resilience and stability of ecological systems. Annual Review of Ecology and Systematics 4, 1–23.
| Resilience and stability of ecological systems.CrossRef |
Jha, M., Arnold, J. G., Gassman, P. W., Giorgi, F., and Gu, R. R. (2006). Climate change sensitivity assessment on Upper Mississippi River Basin streamflows using SWAT. Journal of the American Water Resources Association 42, 997–1015.
| Climate change sensitivity assessment on Upper Mississippi River Basin streamflows using SWAT.CrossRef |
Jones, R. N., and Durack, P. J. (2005). Estimating the impacts of climate change on Victoria’s runoff using a hydrological sensitivity model. CSIRO Atmospheric Research, Melbourne.
Jones, M. J., and Stuart, I. G. (2008). Regulated floodplains – a trap for unwary fish. Fisheries Management and Ecology 15, 71–79..
Kingsford, R. T. (2000). Ecological impacts of dams, water diversions and river management on floodplain wetlands in Australia. Austral Ecology 25, 109–127.
| Ecological impacts of dams, water diversions and river management on floodplain wetlands in Australia.CrossRef |
Leslie, D., and Ward, K. A. (2002). Murray River environmental flows 2000–2001. Ecological Management & Restoration 3, 221–223..
MDBC (2006). The Chowilla Floodplain and Lindsay–Wallpolla Islands Icon Site environmental management plan 2006–2007. Murray–Darling Basin Commission, Canberra.
Milly, P. C. D., Dunne, K. A., and Vecchia, A. V. (2005). Global pattern of trends in streamflow and water availability in a changing climate. Nature 438, 347–350.
| Global pattern of trends in streamflow and water availability in a changing climate.CrossRef | 1:CAS:528:DC%2BD2MXht1WksbfJ&md5=1be5daf864687d32d6558c374d53027aCAS | 16292308PubMed |
National Research Council (2008). ‘Hydrologic Effects of a Changing Forest Landscape.’ Committee on Hydrologic Impacts of Forest Management. (National Academies Press: Washington, DC.)
Neff, R., Change, H. J., Knight, C. G., Najjar, R. G., Yarnal, B., et al. (2000). Impact of climate variation and change on mid-Atlantic region hydrology and water resources. Climate Research 14, 207–218.
| Impact of climate variation and change on mid-Atlantic region hydrology and water resources.CrossRef |
Nolin, A. W., and Daly, C. (2006). Mapping ‘at risk’ snow in the Pacific Northwest. Journal of Hydrometeorology 7, 1164–1171.
| Mapping ‘at risk’ snow in the Pacific Northwest.CrossRef |
Palmer, M. A., Lettenmaier, D., Poff, N. L., Postel, S., Richter, B., et al. (2008). Wild and scenic rivers. In ‘Preliminary Review of Adaptation Options for Climate-sensitive Ecosystems and Resources’. Chapter 6. A Report by the US Climate Change Science Program and the Subcommittee on Global Change Research. (Eds S. H. Julius and J. M. West.) pp. 1–38. (US Environmental Protection Agency: Washington, DC.)
Pittock, J., Hansen, L. J., and Abell, R. (2008). Running dry: freshwater biodiversity, protected areas and climate change. Biodiversity 9, 30–38..
Poff, N. L., Brinson, M. M., and Day, J. W. (2002). Aquatic ecosystems and global climate change. Potential impacts on inland freshwater and coastal wetland ecosystems in the United States. Report for Pew Center on Global Climate Change. Available at www.pewclimate.org/docUploads/aquatic.pdf [accessed 20 September 2009].
Poff, N. L., Olden, J. D., Merritt, D. M., and Pepin, D. M. (2007). Homogenization of regional river dynamics by dams and global biodiversity implications. Proceedings of the National Academy of Sciences, USA 104, 5732–5737.
| Homogenization of regional river dynamics by dams and global biodiversity implications.CrossRef | 1:CAS:528:DC%2BD2sXkt1Kgsb4%3D&md5=3551e8ff05feed5fc854892b6adcc8ccCAS |
Preston, B. L., and Jones, R. N. (2008). A national assessment of the sensitivity of Australian runoff to climate change. Atmospheric Science Letters 9, 202–208.
| A national assessment of the sensitivity of Australian runoff to climate change.CrossRef |
Richter, B. D., Warner, A. T., Meyer, J. L., and Lutz, K. (2006). A collaborative and adaptive process for developing environmental flow recommendations. River Research and Applications 22, 297–318.
| A collaborative and adaptive process for developing environmental flow recommendations.CrossRef |
Robertson, H. A., and Fitzsimons, J. A. (2005). Wetland reservation on Victoria’s Northern Plains and riverine forests. Proceedings of the Royal Society of Victoria 117, 139–148..
Rodell, M., Velicogna, I., and Famiglietti, J. S. (2009). Satellite-based estimates of groundwater depletion in India. Nature 460, 999–1002.
| Satellite-based estimates of groundwater depletion in India.CrossRef | 1:CAS:528:DC%2BD1MXpsleqs78%3D&md5=aab03c9498b2d054119c17e481dedf19CAS | 19675570PubMed |
Scheffer, M., Carpenter, S., Foley, J. A., Folke, C., and Walker, B. (2001). Catastrophic shifts in ecosystems. Nature 413, 591–596.
| Catastrophic shifts in ecosystems.CrossRef | 1:CAS:528:DC%2BD3MXnsleht7c%3D&md5=6f29cccc875b17653b0b833e3904aa80CAS | 11595939PubMed |
Schneeberger, C., Blatter, H., Abe-Ouchi, A., and Wild, M. (2003). Modelling changes in the mass balance of glaciers of the northern hemisphere for a transient 2 × CO2 scenario. Journal of Hydrology 282, 145–163.
| Modelling changes in the mass balance of glaciers of the northern hemisphere for a transient 2 × CO2 scenario.CrossRef | 1:CAS:528:DC%2BD3sXotlWktr4%3D&md5=2fa498824c9335e1df83eaa11a6c1cc6CAS |
Stewart, G., and Harper, B. (2002). Barmah–Millewa forest environmental water allocation. Water Science and Technology 45, 217–223..
| 1:STN:280:DC%2BD38vhslWrsQ%3D%3D&md5=aeb0b92fb19e665b08a28092ad81e994CAS | 12171356PubMed |
Stewart, I. T., Cayan, D. R., and Dettinger, M. D. (2005). Changes toward earlier streamflow timing across western North America. Journal of Climate 18, 1136–1155.
| Changes toward earlier streamflow timing across western North America.CrossRef |
Tague, C., Grant, G., Farrell, M., Choate, J., and Jefferson, A. (2008). Deep groundwater mediates streamflow response to climate warming in the Oregon Cascades. Climatic Change 86, 189–210.
| Deep groundwater mediates streamflow response to climate warming in the Oregon Cascades.CrossRef |
US Geological Survey (2009). ‘National Water Information System (NWIS) Database.’ Available at http://waterdata.usgs.gov/or/nwis/nwis [accessed 16 October 2009].
Van Roosmalen, L., Christensen, B. S. B., and Sonnenborg, T. O. (2007). Regional differences in climate change impacts on groundwater and stream discharge in Denmark. Vadose Zone Journal 6, 554–571.
| Regional differences in climate change impacts on groundwater and stream discharge in Denmark.CrossRef |
VEAC (2006). River Red Gum Forests Investigation discussion paper. Victorian Environmental Assessment Council, Melbourne.
VEAC (2007). River Red Gum Forests Investigation draft proposals paper for public comment. Victorian Environmental Assessment Council, Melbourne.
VEAC (2008a). Identifying flood-dependent natural values on the Victorian floodplains of the River Murray and its tributaries. Version 1.0. Victorian Environmental Assessment Council, Melbourne. Available at www.veac.vic.gov.au/reports/352-VEAC_Red_Gum_Flood-dependent_natural_values_Report_V1-0.pdf [accessed 13 September 2009].
VEAC (2008b). River Red Gum Forests Investigation final report. Victorian Environmental Assessment Council, Melbourne.
Xu, C., Widen, E., and Halldin, S. (2005). Modelling hydrological consequences of climate change – progress and challenges. Advances in Atmospheric Sciences 22, 789–797.
| Modelling hydrological consequences of climate change – progress and challenges.CrossRef |