Desertification of Arid Lands

Dregne, H. E.

doi:10.2307/142969

Cited by 121 publications

(84 citation statements)

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“…Spatial distribution of desertification was identified and documented in several maps (e.g. Dregne, 1983;UNEP, 1997;Kharin et al, 1999). The global extent of the problem of desertification was expanded in the revised second edition of the World Atlas of Desertification (UNEP, 1997).…”

Section: Desertificationmentioning

confidence: 99%

Environmental Change and Human Security: Recognizing and Acting on Hazard Impacts

Liotta¹

2008

NATO Science for Peace and Security Series C: Environmental Security

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Section: Desertificationmentioning

confidence: 99%

Environmental Change and Human Security: Recognizing and Acting on Hazard Impacts

Liotta¹

2008

NATO Science for Peace and Security Series C: Environmental Security

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“…By arid, Sheridan means drylands including arid, semi-arid, and subhumid ecozones with three major deserts, the Sonoran, Mojave, which are arid ecosystems and not climatic deserts, as is the Great Basin, and six major river basins, Columbia, Snake, Sacramento, San Joaquin, Colorado, and Rio Grande (Fig. Dregne (1977) calculated that 1.1 million square miles (about 2.85 million km 2 ) (36.8% of the continent's arid land) are prone to severe land degradation. Dregne (1977) calculated that 1.1 million square miles (about 2.85 million km 2 ) (36.8% of the continent's arid land) are prone to severe land degradation.…”

Section: Location Of Land Degradation In the Drylands Of The Usamentioning

confidence: 99%

“…These desertification values are for the status (present conditions) not for risks (prone to) (Dregne 1983 Where is land degradation observed in the USA? If we compare Dregne's (1977) map of the states of desertification with the map of the North American Deserts …”

Section: Location Of Land Degradation In the Drylands Of The Usamentioning

confidence: 99%

Desertification

Mainguet¹

1994

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Cover picture: Djida, Vallee du serpent. Red dune system, interspersed with trees, very degraded after the drought 1968-1985. This photograph was taken in July 1985, just after. the first rain. The trees, appearing a1most lifeless, show some foliage among dry branches. The soil apposes a red, almost reactivated dune (background), and an interdunal depression with little, discontinuous and broken crusting (foreground). (Copyright by M. Mainguet)The first edition was published as Vol. 9 of the series "Springer Series in Physical Environment" .

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“…Desertification is associated with long-term changes in the functions of ecosystems (Dregne 1977), involving both the spatial and the temporal component and leading to a reduced productivity and biodiversity (Mouat et al 1997). The surfaces affected by desertification are characterised by scarce precipitation and intense evapotranspiration which lead to sparse growth of vegetation and the occurrence of groups of simple structure plants.…”

Section: Introductionmentioning

confidence: 99%

Assessing and monitoring the risk of desertification in Dobrogea, Romania, using Landsat data and decision tree classifier

Vorovencii

2015

Environ Monit Assess

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The risk of the desertification of a part of Romania is increasingly evident, constituting a serious problem for the environment and the society. This article attempts to assess and monitor the risk of desertification in Dobrogea using Landsat Thematic Mapper (TM) satellite images acquired in 1987, 1994, 2000, 2007 and 2011. In order to assess the risk of desertification, we used as indicators the Modified Soil Adjustment Vegetation Index 1 (MSAVI1), the Moving Standard Deviation Index (MSDI) and the albedo, indices relating to the vegetation conditions, the landscape pattern and micrometeorology. The decision tree classifier (DTC) was also used on the basis of pre-established rules, and maps displaying six grades of desertification risk were obtained: non, very low, low, medium, high and severe. Land surface temperature (LST) was also used for the analysis. The results indicate that, according to pre-established rules for the period of 1987-2011, there are two grades of desertification risk that have an ascending trend in Dobrogea, namely very low and medium desertification. An investigation into the causes of the desertification risk revealed that high temperature is the main factor, accompanied by the destruction of forest shelterbelts and of the irrigation system and, to a smaller extent, by the fragmentation of agricultural land and the deforestation in the study area.

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Desertification of Arid Lands

Cited by 121 publications

References 0 publications

Environmental Change and Human Security: Recognizing and Acting on Hazard Impacts

Environmental Change and Human Security: Recognizing and Acting on Hazard Impacts

Desertification

Assessing and monitoring the risk of desertification in Dobrogea, Romania, using Landsat data and decision tree classifier

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