Download Aridity: Droughts and Human Development by Monique Mainguet PDF

By Monique Mainguet

ISBN-10: 3642083277

ISBN-13: 9783642083273

ISBN-10: 3662039060

ISBN-13: 9783662039069

At the intersection of environmental technological know-how and human biology this ebook bargains with dry ecosystems - aridity, droughts, wind and its impact on soils and law - the societies tormented by those ecosystems, and the inventiveness of these dwelling lower than those stipulations. those environments are the foundation of nomad life, of irrigated agriculture and of the 1st civilisations depending on streams. adjustments within the glossy epoch, the ever-increasing expertise and demographic improvement convey that environmental degradation and the socio-economic scenario can't be defined by way of only one issue. This booklet attempts to reply to the query no matter if long-lasting improvement is feasible in dry environments.

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Sample text

From studies of hydrometeorological data and the discharge of water courses in West Africa (Niger and Senegal), Hubert et al. (1989) presented evidence that in the 20th century there were two humid phases, 1923-1935 and 1951-1970, and three dry phases, one prior to 1922, 1936-1950 and after 1970 (Fig. 7). As turning points are used the historic droughts of 1910,1940 and 1970. The authors remarked that "the different climatic phases elaborated are part of a trend of aggravating aridity ... P:' This trend was also observed from variation in the water level of Lake Chad since the start of the 18th century (Maley 1981), and is found also in the deserts of Asia.

Breeding projects of the last three decades placed emphasis on the health of the animals and on the supply of water for breeding purposes, mostly in the form of open wells of large diameter or on tubular wells and deep bore-holes using mechanical means of pumping. These new wells were installed in public places and therefore accessible to everybody which reduced the efficiency of the traditional rules regulating access to grazing on which the owners of the water wells had a right of use. Even today the public wells are still constructed without consultation of the local population and frequently installed in areas in which one erroneously assumes a rather abundant supply of grazing.

Outline the different responses in relation to the severity of the drought. Foresee strategies for the time after the drought and the return to normal. The example of Kenya may serve as an illustration for the complexity of the problems caused by a drought at a point in time and space, of the complexity of its analysis and of the necessary responses. 7 What Lessons Do We Learn from the Last Drought in the Sahel? Poncet (1974) estimated that at the start of the drought in the Dallols of Niger the population north of 13° N was affected most and the pastures deteriorated as natural reseeding did not take place due to the lack of rains.

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