Showing papers on "Nonpoint source pollution published in 1971"

Water pollution in Lake Michigan by trace elements from pollution aerosol fallout

Abstract: Certain trace elements which are strongly associated with air pollution sources in the Lake Michigan basin may be contributing significantly to lake water pollution by an atmospheric fallout route. In this paper a partial inventory of air pollution emissions for 30 trace elements is presented for the Chicago, Milwaukee, and northwest Indiana metropolitan areas, based on available published information. The inventory is then compared with actual stream inputs measured for Zn, Cu, and Ni and with estimates of pre-industrial unpolluted stream inputs for 28 elements. Evidence indicates that the atmosphere may now be a major source of Zn in Lake Michigan, and atmospheric inputs of Cu and Ni may also be considerable. Moreover, the evidence suggests that air pollution probably exceeds expected unpolluted stream inputs for many additional elements in Lake Michigan, highlighting the need for more comprehensive chemical data to quantify the evaluation.

Water, air, and soil pollution : an international journal of environmental pollution

Abstract: (1971). Water, Air and Soil Pollution. International Association of Scientific Hydrology. Bulletin: Vol. 16, No. 1, pp. 122-123.

Water pollution in Delhi lakes

Abstract: Water pollution in Delhi has recently become a rather frequent phenomenon, causing large-scale fish mortality in lakes and rivers, and presents serious health hazards to the citizens. This year, in March, the water supply of many South Delhi colonies was contaminated and it posed the threat of jaundice to the inhabitants. Again in the first week of April a large scale fish mortality was witnessed in shallow lakes behind ModeITown, Delhi. The decaying fish generated so much of foul smell that the general atmosphere of Model Town and its adjoining localities was intolerable. The residents in these localities had a real hard time for one full week. After this incident public health authorities have banned fishing in these waters as a measure of safety. But truely speaking water pollution in Delhi has never been taken seriously, though the capital city is periodically suffering from the menace of water pollution since 1956, when a jaundice epidemic broke out in the town. In most cases of pollution, even the cause and nature of pollutants is not precisely ascertained, what to mention the scrutiny of post-pollution measures taken to combat the health hazards. The present study of polluted lakes behind Model Town, where the author happens to live, was undertaken to 1. identify the cause and source of pollution leading to mass fish mortality, and 2. critically evaluate the precautionary measures taken by the concerned authorities.