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The São Pedro do Sul Medical Spa is one of the driving forces behind the development of the region. The entire activity of the medical spa is based on available hydromineral resource: a natural mineral water, sulphureous and hot. For the entire medical spa process to work normally, there is a strict notion that the natural mineral water exploited in the abstractions cannot, in any way, change its physical-chemical quality. At the same time, in the proximity of the medical spa there is continuous urbanistic pressure, especially for new facilities such as the desire to build new hotels, or improve existing ones, with the inclusion of new aqualudic spaces, among others. This activity associated with territory occupation, in the proximity of the natural mineral water abstractions, can potentially interfere with local normal groundwater, and even potentiate the contamination of the hydromineral resource. It is in this context that this paper is carried out. Thus, in this work, after an item "introduction", relatively well developed, with the explanation of the subject impact, and the legislative framework, a concrete case is presented, which is the intention to build new outdoor pools, to be associated with the current Hotel do Parque. The various legal bureaucratic procedures associated with technical-scientific aspects are presented, and it should be noted that the new intention (construction of new pools) had a favorable technical advice but imposing some changes to the project and fundamentally requiring the installation of special piezometers, to monitor the quality of groundwater in the proximity of the future pools, over time. In the following, the morphological, geological and hydrogeological aspects are summarized, and in some detail, elements of the design/construction of the piezometers are presented, as well as the results of the quality of the groundwater intersected with them. Finally, the main conclusions and recommendations to be considered in the future are mentioned. [ABSTRACT FROM AUTHOR]

The sulphureous spring of Ponte do Fumo is a small natural source of groundwater, whose use for medicinal purposes in rheumatic and dermatological diseases is very old, losing the beginning of its use in time. In the 70's of the last century, it was still used in very vernacular installations, however today it is totally abandoned. Because this type of special water resource, has a long and extensive geohydraulic circuit, that spring today continues to maintain its small flow and its unique chemical characteristics, which are very evident in the place, not only because of its bad smell of eggs rotten, such as by the biojelly (white cream) that develops next to it. On the other hand, this type of resource, if captured at depth, has the potential to obtain adequate flow to build a health unit, of the medical spa type, as well as allowing geothermal uses, as these waters at depth tend to be hot. It is therefore very important that studies are carried out on site, which would make it possible to lead to such a situation. Thus, in this paper, in an initial part, introduction, we present the importance of sulphureous waters for society, the elementary aspects of its chemical composition and of its geohydraulic models, among others, such as previous references about the Ponte do Fumo sulphureous spring. Next, the methodology of the work is presented. Then, as results, the geomorphological, geological and hydrogeological aspects, the conceptual geohydraulic model of sulphureous water and also the order of magnitude of water flow to be explored from a deep well, are presented. Finally, some final remarks are presented with the main conclusions, pointing out the best area for prospecting and research in order to contribute to a future sulphureous groundwater abstraction. [ABSTRACT FROM AUTHOR]