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1. Natural water resources
1.1 Water cycle in nature
In nature, water in its various states follows a vast cycle, summarized in the diagram at 1 .
The various stages of this
Precipitation: atmospheric water vapour condenses into clouds, generating precipitation in the form of rain, snow or hail. Precipitation, which is the source of almost all our freshwater reserves, varies from region to region, depending on climate and relief, which are essential factors.
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Natural water resources
Regulatory review
Bibliography
General works
Standardization
Afnor standards
- Essais des eaux. Détermination de la concentration totale en calcium et magnésium. Méthode titrimétrique à l'EDTA. - NF T 90-003 - août 1984
- Essais des eaux. Dosage des ions sulfates. Méthode gravimétrique. - NF T 90-009 - sept. 1986
- Essais des eaux. Dosage de l'anhydride carbonique. - NF T 90-011 - août 1962
- Essais des eaux. dosage des ions chlore. (Confirmée en août 1980)...
Laboratories approved for water sanitary control
These are laboratories approved under the decree of January 3, 1989 on water intended for human consumption and the decree of April 7, 1981 on hygiene and safety standards applicable to swimming pools and bathing areas. Approval is granted by the Ministry of Health, on the advice of the Conseil Supérieur d'Hygiène Publique de France, on the basis of the qualifications of laboratory staff...
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