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Home Science Graduate of Sciences Geology Unison addressed the serious problem of subsidence

Graduate of Sciences Geology Unison addressed the serious problem of subsidence


#Posted note: 2020-12-30

#Jesus #Alberto #Rubio

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#In #Mexico there is the problem of subsidence in different cities, generally as a consequence of the extraction of water from the aquifers and, more frequently, in semi-desert areas, without ruling out the possible impact by neotectonic movements, said #Claudia #Morales #Hernández, #Graduated from the #Master of #Science in #Geology at the #University of #Sonora.

#He stated that in various parts of the world subsidence, both slow (subsidence) and sudden (collapse) and cracking in recent deposits have been observed, this process being increasingly palpable in the urban environment, for which it has become an important case study.

#In our entity, for example in #Empalme, some subsidence has been reported, a situation that led him to carry out a thesis research in that town under the direction of academic #Francisco #Javier #Grijalva #Noriega.

“The work included a total of six visits to the study area, of which five were for the survey of structural data, where 39 information points were obtained that allowed to know in detail the distribution and characteristics of the fracturing, identifying 23 faults in the northern part of #Empalme, ”he said.

#Morales #Hernández announced that the study also addressed the geophysical survey, with the #Electrical #Tomography #Analysis #Method, in three urban sections of that town.

#In the #Earthquake #Map for the southwest of the #State of #Sonora, #Claudia #Morales pointed out that two groups of concentration of epicenters are observed: one towards the south-southwest of #Empalme, agreeing with the main faults of the #Gulf of #California, and the other towards the southeast of said city, also coinciding with the opening of the #Empalme #Valley.

#For the realization of the #Seismic #Wave #Propagation #Maps (PGA), six magnitudes were taken as examples for a distance from 0 km to 100 km from #Empalme, obtaining as a result intensity ranges that vary between I and V on the #Mercalli scale. “The result is that this region can be considered with a #Degree of #Susceptibility that ranges from moderate to severe,” he said.

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#He specified that the damages that the northern part of #Empalme presents are fractures in houses, in foundations, dalas (tie beams), load-bearing walls, columns, walls, ceilings, fences and floors, in the road, streets, avenues and sidewalks, and in the #Municipal #Pantheon. “These damages range from minor or moderate to severe susceptibility, generating a #Risk #Map with three risk zones: severe, moderate and minor,” he said.

“#When identifying the presence of buried structures that coincide with the superficial presence of evidence of subsidence, an area of ​​moderate seismic susceptibility and the absence of a significant aquifer overexploitation, the main cause was considered to be the seismic activity of the area,” he concluded. .



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https://www.termometroenlinea.com.mx/vernoticiasN.php?artid=82265&cat=1

##Graduate ##Sciences ##Geology ##Unison #addressed #problem #subsidence

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