Dams and disease : ecological design and health impacts of by William Jobin

By William Jobin

A consultant to aid planners and engineers to the improvment of destiny water initiatives. The previous century of worldwide adventure on water tasks is gifted because the foundation for developing new methods. First-hand analyses, together with 35 case stories from 25 international locations, painting the effect of politicians, biologists, engineers, laptop types and physicians at the mind-blowing successes and screw ups of the developers of canals and dams. via drawing in this event, the writer outlines equipment for assessing, predicting and fighting significant water-associated ailments round huge dams, canals and irrigation structures.

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1993). The five principles are generally accepted in the environmental management field, and many are even embedded in environmental and energy regulations in the USA. They are neither new nor allinclusive, but they are important, and should form the basis for developing sustainable health components in water projects: 1 Water projects should be designed with long benefit lives in mind, to serve several generations, at least for a century. 2 Public participation in environmental impact assessment and project planning processes should be maximized.

In bilharzia surveys in Sudan it was found that villages near paved roads had much lower prevalences of disease than did villages served only by rutted tracks. It was necessary to geographically stratify the health surveys to accommodate this large difference, which probably resulted from better access to health care. From this experience, the First Law of Bilharzia Control was formulated: By the time they fix the roads to the endemic zone, the disease will be gone…. 2 Dealing in death The most powerful method for comparing the health impacts for alternative designs of a water project is to predict the annual number of deaths related to each design under consideration.

Chemical methods, biological control, drainage, and finally even burning of the swamp were not enough to eliminate the population of Biomphalaria glabrata from this habitat. In desperation, the public health crews finally formulated the Second Law of Bilharzia Control to explain their failure: The snails always come back. Improved understanding of their population dynamics made it possible to progress from descriptive to quantitative predictions of the number of snails in a population, further aided by computer technology.

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