As human population grows, interactions with water resources on which we are completely dependent, because more and more critical. As population rapidly soars, there is an increasing concurrent prevalence of environmental issues and problems. This is especially true in developing countries where there is less public awareness about environmental problems and an economic need to maximize the use of resources. Water pollution of surface and ground waters is largely a problem in the wake of rising population, rapid urbanization and industrialization. The large scale urban growth of new increased domestic waters while the industrial development manifested either in the growth of new industries or in the expansion of the existing established industries had augmented industrial wastes, the discharges of which into water bodes have brought in hazard of water pollution. Rivers, streams, ponds and lakes receives the heavy load of sewage, industrial effluents and agricultural runoffs. Rivers especially in urban areas are serving as the disposal medium of all kinds of wastes. This condition is very severe in case of the rivers, especially in the rapidly urbanizing cites like those in Kathmandu Valley.
A river may be considered to be polluted when the water in it is altered in composition or condition directly or indirectly because of the activities of man, so that it is less suitable for all or any of the purpose. The main cause of the river pollution in Kathmandu valley is the discharge of excessive untreated sewage into a small river and dumping of solid waste into a small river and dumping of solid waste into the river water and on the riverbank. Such untreated sewage and industrial effluents are the most visible causes of contamination along the urban section of river basins in Kathmandu Valley. The important adverse effects of such river water are loss of aesthetic, recreational and industrial and domestic value of water, spread of water borne disease,
scarcity of safe and clean drinking water, loss of aquatic biodiversity etc.
The water pollution problems in rivers are so serious that the capacity to sustain the aquatic life has already approached to nil at the urban part of Kathmandu. Domestic raw sewage is posing many serious problems than the industrial waste; the concentrations of much toxic sustenance that are originated from which are well within the acceptable limits.
A river may be considered to be polluted when the water in it is altered in composition or condition directly or indirectly because of the activities of man, so that it is less suitable for all or any of the purpose. The main cause of the river pollution in Kathmandu valley is the discharge of excessive untreated sewage into a small river and dumping of solid waste into a small river and dumping of solid waste into the river water and on the riverbank. Such untreated sewage and industrial effluents are the most visible causes of contamination along the urban section of river basins in Kathmandu Valley. The important adverse effects of such river water are loss of aesthetic, recreational and industrial and domestic value of water, spread of water borne disease,
scarcity of safe and clean drinking water, loss of aquatic biodiversity etc.
The water pollution problems in rivers are so serious that the capacity to sustain the aquatic life has already approached to nil at the urban part of Kathmandu. Domestic raw sewage is posing many serious problems than the industrial waste; the concentrations of much toxic sustenance that are originated from which are well within the acceptable limits.
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