PHYSICO-CHEMICAL QUALITY OF SOME THERMAL SPRINGS IN THE AGADEZ REGION (NORTH-EAST NIGER).

Without sanitary Agadez is a region located in the North-East of Niger with important groundwater resources whose virtues depend on the sites in which they are discovered, the nature of the subsoil and the geophysical setting. The thermal springs of the Agadez region are a great asset and are exploited by the population for various uses. These springs are at a traditional stage of operation in thermal treatments control. It is in this context that a study on the physico-chemical quality of some thermal springs in the Agadez region was carried out. The purpose of this study is to evaluate the Agadez region thermal water potentialfollowed by a physico-chemical analysis of these waters. It is based on hydrochemical and hydrodynamic methods. Field surveys and analytical investigations allowed us to know the origin and use of water of certain thermal water points by the population. Indeed, these waters are used mainly for medical care. They treat diseases such as rheumatism at more than 99%, itching at 100%, oral-lingual mucosa at 97% and anemia at 6%. The results of physico-chemical analyses carried out on samples taken from the thermal springs of Tafadek, Ingall, Ingit?ne, Akakara and Tassinik show that the majority of physico-chemical parameters comply with WHO standards except for bicarbonate, sodium and fluorine contents. The piper diagram revealed two types of families, the sodium and potassium chloride-containing water family and the sodium and potassium bicarbonate-containing water family.