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A guide to help planners and engineers to the improvment of future water projects. The past century of global experience on water projects is presented as the basis for creating new approaches. First-hand analyses, including 35 case studies from 25 countries, portray the influence of politicians, biologists, engineers, computer models and physicians on the spectacular successes and failures of the builders of canals and dams. By drawing on this experience, the author outlines methods for assessing, predicting and preventing major water-associated diseases around large dams, canals and irrigation systems.
The majority of blackflies (family Simuliidae) are blood- suckers of man and domestic animals. Throughout the vast territory of the Soviet Union, in the steppes, forest steppes, and especially the taiga and tundra, blackflies occupy a prominent place among the blood-sucking Diptera. It is now clear, that not only in the tropics but throughout the Soviet Union, blackflies are transmitters of several diseases of domestic animals, mainly onchocerciasis of cattle and reindeer and many dangerous diseases of domestic fowl. Hence blackflies are of medico-veterinary and sanitary-epidemiological importance. Unlike other blood-sucking insects such as the malarial mosquito, blackflies have hitherto bee...
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