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Monitoring vegetation change in desert oases by remote sensing; a case study in the Libyan Fazzān

Published online by Cambridge University Press:  03 March 2015

Kevin White ,
Nick Brooks ,
Nick Drake ,
Mathew Charlton  and
Sue MacLaren
Kevin White
Affiliation:
Landscape and Landform Research Group, Department of Geography, The University of Reading
Nick Brooks
Affiliation:
The Tyndall Centre, School of Environmental Sciences, University of East Anglia
Nick Drake
Affiliation:
Department of Geography, Kings College London
Mathew Charlton
Affiliation:
Landscape and Landform Research Group, Department of Geography, The University of Reading
Sue MacLaren
Affiliation:
Department of Geography, University of Leicester
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Abstract

Desert oases are undergoing rapid changes in response to environmental, economic and social pressures. The Wādī al-Hayāt, in the Libyan Fazzān, illustrates these changes and exemplifies some of the processes at work. Human activity in the area is dependent on groundwater extraction. Introduction of mechanical pumps and modern irrigation technology has enabled significant expansion of irrigated area, but environmental problems have arisen as a result. Geoarchaeological studies have demonstrated that groundwater levels have fallen over the latter half of the Holocene. Large decreases have occurred since 1970 as a result of abstraction for agricultural, domestic and industrial use. This study uses aerial photographs from 1958 and Landsat imagery from 1987, 1999 and 2000 to map changes in the area under irrigation in the Wādī al-Hayāt. We find a general southwards migration of oasis agriculture within the Wādī, as vegetation has died in the northern part of the Wādī and irrigation extended to the south. A significant amount of inter-annual change in vegetation cover is identified, indicating the need to account for seasonal cropping practices when monitoring for longer-term changes.

Type
Articles
Information
Libyan Studies , Volume 34 , 2003 , pp. 153 - 166
Copyright
Copyright © Society for Libyan Studies 2003

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References

Bruce-Lockhart, J. and Wright, J. 2000. Difficult and Dangerous Roads. Hugh Clapperton's Travels in Sahara and Fezzan 1822-1825. London: Sickle Moon Books/Society for Libyan Studies.Google Scholar
Claussen, M., Kubatzki, C., Brovkin, V., Ganopolski, A., Hoelzmann, P. and Pachur, H. J. 1999. Simulation of an abrupt change in Saharan vegetation in the mid- Holocene. Geophysical Research Letters 26: 2037–40.CrossRefGoogle Scholar
Cremaschi, M. 1998. Late Quaternary geological evidence for environmental changes in south-western Fezzan (Libyan Sahara) in Cremaschi and Di Lernia 1998, 13–47.Google Scholar
Cremaschi, M. and Di Lernia, S. (eds.), 1998. Wadi Teshuinat: Palaeoenvironment and prehistory in south-western Fezzan (Libyan Sahara). Centro Interuniversitario di Ricerca per le Civiltà e l'Ambiente del Sahara Antico.Google Scholar
Cremaschi, M. and Di Lernia, S. 1998. The geoarchaeological survey in central Tadrart Acacus and surroundings (Libyan Sahara): environment and culture. In Cremaschi and Di Lernia 1998, 243–96.Google Scholar
Crippen, R. E. 1987. The regression intersection method of adjusting image data for band ratioing. International Journal of Remote Sensing 8: 137–15.CrossRefGoogle Scholar
Edmonds, M. Forthcoming 2004. Libyan Saharan groundwaters. In Natural Resources and Cultural Heritage of the Libyan Desert: Conference proceedings Tripoli, December 14-21, 2002. Edited by Mattingly, D. J., McLaren, S., Savage, E., al-Fasatwi, Y. and Gadgood, K.. Society for Libyan Studies, London.Google Scholar
Heard-Bey, F. 1974. Development anomalies in the Bedouin oases of al-Liwa. Asian Affairs 61: 272–86.CrossRefGoogle Scholar
Markham, B. L. and Barker, J. L. 1986. Landsat MSS and TM post-calibration dynamic ranges, exoatmospheric reflectances and at-satellite temperatures. EOSAT Technical Notes, pp. 3–8.Google Scholar
Mattingly, D. J., Brooks, N., Cole, F., Dore, J., Drake, N., Leone, A., Hay, S., McLaren, S., Newson, P., Parton, H., Pelling, R., Preston, J., Reynolds, T., Schrüfer-Kolb, I., Thomas, D., Tindall, A., Townsend, A. and White, K. 2001. The Fezzan Project 2001: Preliminary report on the fifth season of work. Libyan Studies 32: 133–53.CrossRefGoogle Scholar
Nicholson, S. E. and Flohn, H. 1980. African environmental and climatic changes and the general atmospheric circulation in Late Pleistocene and Holocene. Climatic Change 2: 313–48.CrossRefGoogle Scholar
Pallas, P. 1978. Water resources in the Socialist People's Libyan Arab Jamahiriya. Proceedings of the 2nd Symposium on the Geology of Libya, Tripoli, 539–91.Google Scholar
Petit-Maire, N., Delibrias, G. and Gaven, C. 1980. Pleistocene lakes in the Shati area, Fezzan. Pataeoecology of Africa 12: 289–95.Google Scholar
Springborg, R. 1977. New patterns of agrarian reform in the Middle East and North Africa. Middle East Journal 31: 127–42.Google Scholar
Van der Veen, M. 1992. Botanical evidence for Garamantean agriculture in the Fezzan, southern Libya. Review of Paleobotany and Palynology 73: 315–27.CrossRefGoogle Scholar
White, K., McLaren, S. J., Black, S. and Parker, A. 2000. Evaporite minerals and organic horizons in sedimentary sequences in the Libyan Fezzan: Implications for palaeoenvironmental reconstruction. In Linking Climate Change to Land Surface Change, edited by McLaren, S. J. and Kniveton, D. R.. Amsterdam, 193–208.CrossRefGoogle Scholar
Wilkinson, J. C. 1978. Problems of Oasis Development. School of Geography Research Paper 20, University of Oxford.Google Scholar