Abstract
The potential of using synthetic aperture radar (SAR) imagery to study seasonal variations in floodplain inundation and accompanying changes in herbaceous plant communities was assessed for aquatic environments in the Kakadu region of northern Australia. Dual wavelength (C- and L-band), co- and cross-polarized (HH and HV) SAR imagery of the floodplain of Magela Creek, a tributary of the East Alligator River, was acquired in April and October 1994 during the Spaceborne Imaging Radar-C (SIR-C) missions of the Space Shuttle. The results indicate the effectiveness of multifrequency, polarimetric SAR as follows: woody and herbaceous vegetation in flooded and nonflooded states can be mapped. Aquatic, herbaceous macrophyte communities, such as Nelumbo nucifera, Pseudoraphis grassland and Hymenachne-Eleocharis swamp, can be distinguished. Phenologic changes in macrophyte communities between April and October are apparent. The similarity of the Magela floodplain to the extensive floodplains in northern Australia suggests that these results can be extended regionally.
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Andersen, A. N., 1996. Fire ecology and management. In Finlayson, C. M. & I. von Oertzen (eds), Landscape and Vegetation Ecology of the Kakadu Region, Northern Australia. Kluwer Academic Publishers, Dordrecht, The Netherlands: 179–195.
Clark, L. A. & D. Pregibon, 1992. Tree-based models. In: Chambers, J. M. & T. J. Hastie (eds), Statistical Models in S. Wadsworth & Brooks/Cole, Pacific Grove (Calif.): 377–420.
Cook, C. D. K., 1996. Aquatic and Wetland Plants of India. Oxford University Press, Oxford. 385 pp.
Devonport, C., 1993. Magela Creek Flood Plain Video Survey, 5 October 1993. Internal Report IR 130, Supervising Scientist for the Alligator Rivers Region, Darwin NT. 9 pp.
Devonport, C., P. Waggitt & M. Finlayson, 1994. Magela Creek Flood Plain Video Survey, 20 April 1994. Internal Report IR 156, Supervising Scientist for the Alligator Rivers Region, Darwin NT. 14 pp.
Finlayson, C. M. & C. D. Woodroffe, 1996. Wetland vegetation. In Finlayson, C. M. & I. von Oertzen (eds), Landscape and Vegetation Ecology of the Kakadu Region, Northern Australia. Kluwer Academic Publishers, Dordrecht, The Netherlands: 81–112.
Finlayson, C. M., B. J. Bailey & I. D. Cowie, 1989. Macrophyte Vegetation of the Magela Creek Floodplain, Alligator Rivers Region, Northern Territory. Research Report 5, Supervising Scientist for the Alligator Rivers Region. Australian Government Publishing Service, Canberra. 38 pp.
Freeman, A., M. Alves, B. Chapman, J. Cruz, Y. Kim, S. Shaffer, J. Sun, E. Turner & K. Sarabandi, 1995. SIR-C data quality and calibration results. IEEE Trans. Geosci. Rem. Sensing 33: 848–857.
Hart, B. T. & R. J. McGregor, 1982. Water Quality Characteristics of Eight Billabongs in the Magela Creek Catchment. Research Report 2, Supervising Scientist for the Alligator Rivers Region. Australian Government Publishing Service, Canberra. 60 pp.
Hess, L. L., J. M. Melack & D. S. Simonett, 1990. Radar detection of flooding beneath the forest canopy: a review. Int. J. Rem. Sensing 11: 1313–1325.
Hess, L. L., J.M. Melack, S. Filoso & Y. Wang, 1995. Delineation of inundated area and vegetation along the Amazon floodplain with the SIR-C synthetic aperture radar. IEEE Trans. Geosci. Rem. Sensing 33: 896–904.
Imhoff, M. L., T. D. Sisk, A. Milne, G. Morgan & T. Orr, 1997. Remotely sensed indicators of habitat heterogeneity: use of synthetic aperture radar in mapping vegetation structure and bird habitat. Rem. Sensing of Environ. 60: 217–227.
Kasischke, E. S., J. M. Melack & M. C. Dobson, 1997. The use of imaging radars for ecological applications – a review. Rem. Sensing of Environ. 59: 141–156.
McQuade, C. V., J. T. Arthur & I. J. Butterworth, 1996. Climate and hydrology. In Finlayson, C. M. & I. von Oertzen (eds), Landscape and Vegetation Ecology of the Kakadu Region, Northern Australia. Kluwer Academic Publishers, Dordrecht, The Netherlands: 17–35.
Morton, S., K. G. Brennan & M. D. Armstrong, 1993. Distribution and abundance of herons, egrets, ibises and spoonbills in the Alligator Rivers Region, Northern Territory. Wildlife Res. 20: 23–43.
Pope, K. O., E. Rejmankova, J. F. Paris & R. Woodruff, 1997. Detecting seasonal flooding cycles in marshes of the Yucatan Peninsula with SIR-C polarimetric radar imagery. Rem. Sensing of Environ. 59: 157–166.
Richards, J. A., P. W. Woodgate & A. K. Skidmore, 1987. An explanation of enhanced radar backscattering from flooded forests. Int. J. Rem. Sensing 8: 1093–1100.
Sainty, G. & S.W. L. Jacobs, 1994.Waterplants in Australia: a Field Guide, 3rd edn. Sainty & Associates, Darlinghurst. 327 pp.
Smith, L. C., 1997, Satellite remote sensing of river inundation area, stage, and discharge: a review. Hydrol. Proc. 11: 1427–1439.
Stofan, E., D. Evans, C. Schmullius, B. Holt & J. Plaut, 1995. Overview of results of Spaceborne Imaging Radar-C, X-band Synthetic Aperture Radar (SIR-C/X-SAR). IEEE Trans. Geosci. Rem. Sensing 33: 817–828.
Townsend, P. A., 2001. Mapping seasonal flooding in forested wetlands using multi-temporal Radarsat SAR. Photogrammetric Engineering and Remote Sensing 67: 857–864.
Waggitt, P., C. Devonport & M. Finlayson, 1995. Magela Creek Flood Plain Video Survey No. 3, 18 October 1994. Internal Report IR 175, Supervising Scientist for the Alligator Rivers Region, Darwin NT. 10 pp.
Wilson, B. A., J. Russell-Smith & R. Williams, 1996. Terrestrial vegetation. In Finlayson, C. M. & I. von Oertzen (eds), Landscape and Vegetation Ecology of the Kakadu Region, Northern Australia. Kluwer Academic Publishers, Dordrecht, The Netherlands: 56–80.
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Hess, L.L., Melack, J.M. Remote sensing of vegetation and flooding on Magela Creek Floodplain (Northern Territory, Australia) with the SIR-C synthetic aperture radar. Hydrobiologia 500, 65–82 (2003). https://doi.org/10.1023/A:1024665017985
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DOI: https://doi.org/10.1023/A:1024665017985