Analise estratistica de dados hidrogeologicos de pocos tubulares profundos do municipio de Curitiba-Parana  [Statistical analysis of hydrogeological data from tubular wells in the Municipality of Curitiba, Parana]

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Alternate Title:Statistical analysis of hydrogeological data from tubular wells in the Municipality of Curitiba, Parana
Authors:Chavez-Kus, Lilian; Salamuni, Eduardo
Author Affiliations:Primary:
Universidade Federal do Parana, Departamento de Geologia, Parana, Brazil
Volume Title:Boletim Paranaense de Geociencias
Source:Boletim Paranaense de Geociencias, Vol.53, p.59-80. Publisher: Universidade Federal do Parana, Instituto de Geologia, Curitiba, Brazil. ISSN: 0067-964X
Publication Date:2003
Note:In Portuguese with English summary. 14 refs.; illus., incl. sketch maps
Summary:The studied area is made up solely of the municipality district of Curitiba (PR), which is almost totally positioned on the rocks of the Guaratuba Formation, in Curitiba Basin. It is placed beneath the Atuba Complex, formed by deformed granitoids, gneiss and amphibolites, affected by an intricate net of generally open fractures that give away an effective circulation of groundwater. The main objective of this research is to identify and to compare the hydrogeological data referring to the fractured aquifer of Atuba COmplex, through a conventional statistical analysis. The use of the statistics sought to identify the geographic distribution and characteristics of variables relative to the deep tubular wells of the studies area (figure 1), in the research, hydrogeological databases, examined previously by Salamuni (1981), Nogueira Filho (1997) and Salamuni (1998), were complemented, updated and reorganized. Therefore, information from 1297 tubular wells was gathered, with bore holes comprising the period from 1950 to 2001 (figure 4). Most of the boreholes were georeferenced in the field, with the aid of a GPS. Through the statistical analysis, the familiarization of the data occurred and irregularity patterns were able to be detected. Moreover, through the identification of the structure of the original data, the presence of tendencies and groupings were also detected (figures 5 and 6). It was verified that, in the last 10 years, there was a vertiginous growth in the demand for new boreholes (figure 12 and 13), demonstrating a sharp demand for the use of groundwater as a supply in the provisioning of the city of Curitiba. The main use of the groundwater occurs in the city center and surrounding neighborhoods, followed by the industrial neighborhoods where there is a notable concentration of service (figure 6). The medium depth of the tubular wells in the minicipal is of 112 m, and in extreme cases it reaches 300 m (figures 10 and 11). The variable "depth" and "entrance of water" are positively correlated until 220 m, starting from the surface of the land (figures 17 until 21). Below this horizon there is no information that permits speculation. The horizon in which the groundwater circulates is not only limited to a single level, as a function of the response to a structural conditioning generated by a tectonic ruptile. Although the general average of the variable drainage is 3.6 m3/h, exceptional cases are verified up to 44 m3/h (figures 7 until 9). This heterogeneity of the data shows that the variability of the phenomenon in the area is quite big. The extreme drainage values represent the places where the surveys reached structural alignments or where favorable structures intersected the circulation of groundwater. through the statistical analysis of the data, the presence of a heterogeneous space patterns was confirmed in the hydrogeological variables of the area. That is a first step in the treatment of this information, which will, in the future, allow the data to be hogenised more easily through a structural and geostatistical analysis of the fractured aquifer variables. The study presents a good dimension of the spacialization of the hydrogeological data according to the use of the soil and the political-administrative subdivision of the municipal district.
Subjects:Alluvium; Alluvium aquifers; Aquifers; Clastic sediments; Controls; Ground water; Monitoring; Observation wells; Pollution; Sediments; Statistical analysis; Substrates; Urban environment; Water management; Water quality; Water wells; Brazil; Parana Brazil; South America; Atuba Complex; Curitiba Basin; Curitiba Brazil; Guabirotuba Formation
Coordinates:S254000 S252500 W0490700 W0492400
Record ID:2004072762
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute.
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