Threats from groundwater table rise in urban areas in developing countries.
As developing countries experience rapid urban population growth, frequently aggravating chronic imbalances in the existing infrastructure and also outstripping limited resources, the rise of the groundwater table has become a serious point of concern.
The lack of adequate sanitary sewerage has prompted increasingly widespread use of the unhygienic and inadequate cesspool system for wastewater disposal.
The exfiltration from these cesspools adds directly to the groundwater table rise, as does the leakage from the water distribution network.
In addition, the natural drainage system of wadis and channels that dispersed excess water from rain or flooding has been disturbed and has not been replaced by the construction of adequate drainage systems.
The creeping groundwater table rise, besides hampering the proper functioning of the « cesspool » system, is causing detrimental social, environmental, health, and economic impacts.
In the absence of building proper sanitary sewerage and storm sewer systems, in many countries beyond affordability, wide-ranging construction ofcertain specifically adapted drainage systems may provide an interim answer.
To protect the natural drainage system on the fringes of cities, the expansion of urban areas should progress only in ways that do not cause further disturbance. (...)
Mots-clés Pascal : Eau souterraine, Zone urbaine, Tiers Monde, Effluent, Eau usée urbaine, Niveau piézométrique, Approvisionnement eau, Pluie, Crue, Drainage, Pollution, Eau usée, Moyen Orient, Asie, Réseau distribution, Assainissement, Risque
Mots-clés Pascal anglais : ground water, urban areas, Third World, effluents, sewage, water table, water supply, rainfall, floods, drainage, pollution, waste water, Middle East, Asia
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0236354
Code Inist : 001E01N02. Création : 16/11/1999.