Assessing the impacts of climate change and dams on floodplain inundation and wetland connectivity in the wet-dry tropics of northern Australia

被引：65

作者：

Karim, Fazlul ^{[1
]}

Dutta, Dushmanta ^{[1
]}

Marvanek, Steve ^{[2
]}

Petheram, Cuan ^{[1
]}

Ticehurst, Catherine ^{[1
]}

Lerata, Julien ^{[1
]}

Kim, Shaun ^{[1
]}

Yang, Ang ^{[1
]}

机构：

[1] CSIRO Land & Water, Canberra, ACT 2601, Australia

[2] CSIRO Land & Water, Glen Osmond, SA 5064, Australia

来源：

JOURNAL OF HYDROLOGY | 2015年 / 522卷

关键词：

Connectivity; Floods; Hydrodynamic modelling; MIKE; 21; MODIS; Ecology; SEA-LEVEL RISE; HYDROLOGICAL CONNECTIVITY; RIVER; TOOL; ASSEMBLAGES; ECOSYSTEMS; SIMULATION; PATTERNS; RUNOFF; MODEL;

D O I：

10.1016/j.jhydrol.2014.12.005

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Floodplain wetlands and their hydrological connectivity with main river channels in the Australian wetdry tropics are under increasing pressure from global climate change and water resource development, and there is a need for modelling tools to estimate the time dynamics of connectivity. This paper describes an integrated modelling framework combining conceptual rainfall-runoff modelling, river system modelling and hydrodynamic (HD) modelling to estimate hydrological connectivity between wetlands and rivers in the Flinders and Gilbert river catchments in northern Australia. Three historical flood events ranging from a mean annual flood to a 35-year return period flood were investigated using a two dimensional HD model (MIKE 21). Inflows from upstream catchments were estimated using a river network model. Local runoff within the HD modelling domain was simulated using the Sacramento rainfall-runoff model. The Shuttle Radar Topography Mission (SRTM) derived 30 m DEM was used to reproduce floodplain topography, stream networks and wetlands in the HD model. The HD model was calibrated using stream gauge data and inundation maps derived from satellite (MODIS: MODerate resolution Imaging Spectroradiometer) imagery. An algorithm was developed to combine the simulated water heights with the DEM to quantify inundation and flow connection between wetlands and rivers. The connectivity of 18 ecologically important wetlands on the Flinders floodplain and 7 on the Gilbert floodplain were quantified. The impacts of climate change and water resource development on connectivity to individual wetlands were assessed under a projected dry climate (2nd driest of 15 GCMs), wet climate (2nd wettest of 15 GCMs) and dam conditions. The results indicate that changes in rainfall under a wetter and drier future climate could have large impacts on area, duration and frequency of inundation and connectivity. Topographic relief, river bank elevation and flood magnitude were found to be the key factors contributing to the level of connectivity. Under a wetter future climate the average duration of connection of wetlands to the main river channel increased by 7% and under a drier climate it decreased by 18%. Construction of a 248 GL dam in the Flinders catchment and two (498 and 271 GL capacity) in the Gilbert catchment could reduce the average duration of connectivity by 1% and 2% in the Flinders and Gilbert catchments respectively. This information is potentially useful to future studies on the flood-dependent ecology in this region. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：80 / 94

页数：15

共 38 条

[1] The 'wet-dry' in the wet-dry tropics drives river ecosystem structure and processes in northern Australia
Warfe, D. M.
Pettit, N. E.
Davies, P. M.
Pusey, B. J.
Hamilton, S. K.
Kennard, M. J.
Townsend, S. A.
Bayliss, P.
Ward, D. P.
Douglas, M. M.
Burford, M. A.
Finn, M.
Bunn, S. E.
Halliday, I. A.
FRESHWATER BIOLOGY, 2011, 56 (11) : 2169 - 2195
[2] THE BIRD FAUNA OF A DECIDUOUS WOODLAND IN THE WET-DRY TROPICS OF NORTHERN AUSTRALIA
WOINARSKI, JCZ
TIDEMANN, SC
WILDLIFE RESEARCH, 1991, 18 (04) : 479 - 500
[3] Groundwater use by riparian vegetation in the wet-dry tropics of northern Australia
O'Grady, AP
Eamus, D
Cook, PG
Lamontagne, S
AUSTRALIAN JOURNAL OF BOTANY, 2006, 54 (02) : 145 - 154
[4] Predicted climate change, sea-level rise and wetland management in the Australian wet-dry tropics
Eliot I.
Finlayson C.M.
Waterman P.
Wetlands Ecology and Management, 1999, 7 (1-2) : 63 - 81
[5] Carbon dioxide fluxes dominate the greenhouse gas exchanges of a seasonal wetland in the wet-dry tropics of northern Australia
Beringer, Jason
Livesley, Stephen J.
Randle, Jennifer
Hutley, Lindsay B.
AGRICULTURAL AND FOREST METEOROLOGY, 2013, 182 : 239 - 247
[6] Occurrence and dynamics of potentially pathogenic vibrios in the wet-dry tropics of northern Australia
Padovan, Anna
Siboni, Nachshon
Kaestli, Mirjam
King, William L.
Seymour, Justin R.
Gibb, Karen
MARINE ENVIRONMENTAL RESEARCH, 2021, 169
[7] Carbon Dioxide and Methane Emissions from a Wet-Dry Tropical Floodplain in Northern Australia
Bass, A. M.
O'Grady, D.
Leblanc, M.
Tweed, S.
Nelson, P. N.
Bird, M. I.
WETLANDS, 2014, 34 (03) : 619 - 627
[8] Seasonal water loss of the lizard Lophognathus temporalis in the wet-dry tropics of northern Australia
Blamires, SJ
Christian, KA
AMPHIBIA-REPTILIA, 1999, 20 (02) : 211 - 215
[9] Carbon Dioxide and Methane Emissions from a Wet-Dry Tropical Floodplain in Northern Australia
A. M. Bass
D. O’Grady
M. Leblanc
S. Tweed
P. N. Nelson
M. I. Bird
Wetlands, 2014, 34 : 619 - 627
[10] VEGETATION-RADIATION RELATIONSHIPS IN THE WET-DRY TROPICS - GRANITE HILLS IN NORTHERN AUSTRALIA
KIRKPATRICK, JB
FENSHAM, RJ
NUNEZ, M
BOWMAN, DMJS
VEGETATIO, 1988, 76 (03): : 103 - 112

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