Download PDF by Monique Mainguet: Aridity: Droughts and Human Development

By Monique Mainguet

ISBN-10: 3642083277

ISBN-13: 9783642083273

ISBN-10: 3662039060

ISBN-13: 9783662039069

At the intersection of environmental technology and human biology this booklet bargains with dry ecosystems - aridity, droughts, wind and its impact on soils and rules - the societies plagued by those ecosystems, and the inventiveness of these dwelling less than those stipulations. those environments are the foundation of nomad lifestyles, of irrigated agriculture and of the 1st civilisations depending on streams. alterations within the sleek epoch, the ever-increasing expertise and demographic improvement convey that environmental degradation and the socio-economic scenario can't be defined by means of only one issue. This publication attempts to reply to the query no matter if long-lasting improvement is feasible in dry environments.

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Extra resources for Aridity: Droughts and Human Development

Example text

Rains of normal quantity, but with 32 1 . The Spatial Framework, the Concepts of Aridity and Drought a disadvantageous distribution, may also cause an agricultural drought. This was also the case in Kenya which was on the threshold of famine in 1984. " Thus the pluviometric variability of the Brazilian Nordeste, one of the highest in the world, increases the aridity factor and explains the xerophytic nature of the caatinga. The ecological and agricultural consequences of the drought here are more severe that in the Sahel.

In 1993-1994 the autumn and winter rains were necessary for the aquifers to recover their levels of before 1976. As distinct from aridity, drought is always a relative concept for man and his needs, but both terms are close cousins. For Roche, the term drought has two meanings: " ... a climatologic one: period or year during which precipitation is considerably below the mean" and " '" a hydrological one: period or year during which the runoff is considerably below the mean:' He notes that "drought manifests itself over time (dry period) whereas aridity is a spatial phenomenon (an arid region):' 28 1 .

Niamey received only 281 mm in 1915 instead of an average of 580 mm, representing a deficit of 48%. N'Djamena in 1913 received only 306 mm instead of the mean of 620 mm, representing a deficit of 50%. e. "send your wife away" with the meaning of "free yourself of a mouth to feed:' The drought of 1968-1985 lasted initially from 1968 to 1973 and then, after two less dry years (1974-1976), continued with some interruptions until 1985 with the highest deficits in the years 1982-1984. This reveals the cumulative nature of the deficits but eliminates the spatial and temporal disparities.

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Aridity: Droughts and Human Development by Monique Mainguet

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