ENGINEERING SEISMOLOGY APPLICATIONS IN METROPOLITAN AREAS

Geophysics ◽  
1962 ◽  
Vol 27 (2) ◽  
pp. 213-220 ◽  
Author(s):  
D. Linehan ◽  
V. J. Murphy
Keyword(s):  
Water Table ◽  
Seismic Noise ◽  
Metropolitan Areas ◽  
Seismic Refraction ◽  
Maximum Amount ◽  
Foundation Engineering ◽  
Dense Media ◽  
Engineering Problems ◽  
Geophone Spacing ◽  
The City

Seismic refraction investigations in two “noisy” areas differing in geologic environment and field conditions indicate the reliability of such a technique for foundation engineering problems. Shothole conditions and generating media are of great importance. Dense media, clay, and materials within the water‐table are most favorable; fill debris is the least suitable. Seismic noise in the city, usually transient in character, is not an insurmountable problem; a patient instrument operator is a key to success. Several shot locations along an individual spread and a geophone spacing not to exceed 50 ft are standard field procedure for achieving a maximum amount of data.

scholarly journals Mapping the Pollution Plume Using the Self-Potential Geophysical Method: Case of Oum Azza Landfill, Rabat, Morocco

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 961
Author(s):  
Meryem Touzani ◽  
Ismail Mohsine ◽  
Jamila Ouardi ◽  
Ilias Kacimi ◽  
Moad Morarech ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Water Table ◽  
Soil Surface ◽  
The Self ◽  
Drainage Network ◽  
Geophysical Method ◽  
Direct Measurements ◽  
Sandy Material ◽  
The City ◽  
Self Potential

The main landfill in the city of Rabat (Morocco) is based on sandy material containing the shallow Mio-Pliocene aquifer. The presence of a pollution plume is likely, but its extent is not known. Measurements of spontaneous potential (SP) from the soil surface were cross-referenced with direct measurements of the water table and leachates (pH, redox potential, electrical conductivity) according to the available accesses, as well as with an analysis of the landscape and the water table flows. With a few precautions during data acquisition on this resistive terrain, the results made it possible to separate the electrokinetic (~30%) and electrochemical (~70%) components responsible for the range of potentials observed (70 mV). The plume is detected in the hydrogeological downstream of the discharge, but is captured by the natural drainage network and does not extend further under the hills.

Model-Eliciting Activities: A Research-Based Method for Inquiry Learning and Professional Development in the Engineering Classroom

2008 ◽  
Author(s):  
Tamara J. Moore
Keyword(s):  
Complex Systems ◽  
Student Development ◽  
Engineering Problem ◽  
First Year ◽  
Foundation Engineering ◽  
Underrepresented Populations ◽  
Model Eliciting Activities ◽  
Engineering Problems ◽  
The Given ◽  
Mathematics And Science

Attracting students to engineering is a challenge. In addition, ABET requires that engineering graduates be able to work on multi-disciplinary teams and apply mathematics and science when solving engineering problems. One manner of integrating teamwork and engineering contexts in a first-year foundation engineering course is through the use of Model-Eliciting Activities (MEAs) — realistic, client-driven problems based on the models and modeling theoretical framework. A Model-Eliciting Activity (MEA) is a real-world client-driven problem. The solution of an MEA requires the use of one or more mathematical or engineering concepts that are unspecified by the problem — students must make new sense of their existing knowledge and understandings to formulate a generalizable mathematical model that can be used by the client to solve the given and similar problems. An MEA creates an environment in which skills beyond mathematical abilities are valued because the focus is not on the use of prescribed equations and algorithms but on the use of a broader spectrum of skills required for effective engineering problem-solving. Carefully constructed MEAs can begin to prepare students to communicate and work effectively in teams; to adopt and adapt conceptual tools; to construct, describe, and explain complex systems; and to cope with complex systems. MEAs provide a learning environment that is tailored to a more diverse population than typical engineering course experiences as they allow students with different backgrounds and values to emerge as talented, and that adapting these types of activities to engineering courses has the potential to go beyond “filling the gaps” to “opening doors” to women and underrepresented populations in engineering. Further, MEAs provide evidence of student development in regards to ABET standards. Through NSF-funded grants, multiple MEAs have been developed and implemented with a MSE-flavored nanotechnology theme. This paper will focus on the content, implementation, and student results of one of these MEAs.

Evolution of Pumping and Piezometry of the Carboniferous Aquifers, Western Border of Aïr Massif

2021 ◽  
Vol 8 ◽  
pp. 72-79
Author(s):  
Alhassane Illias ◽  
Abdou Babaye Maman Sani ◽  
Issa M. Salmanou Souleymane ◽  
Ousmane Boureima
Keyword(s):  
Drinking Water ◽  
Water Table ◽  
Methodological Approach ◽  
General Decline ◽  
Western Border ◽  
The City

The Tarat aquifer provides drinking water for the population of the city of Arlit and also provides water to industries. The exploitation of this aquifer has considerably increased in recent years. The main objective of this study is to contribute to a better understanding of the functioning of the Tarat aquifer. Thus, a methodological approach focusing mainly on the piezometric study and the analysis of evolution and estimation of the volumes of water pumped, since its development from 1969 to 2012, which has resulted in highlighting not only a general decline in the level of the Tarat aquifer, but also the piezometer level (Arli_182), reacts strongly to the solicitations of the aquifer. On this same piezometer, the water table was lowered by 30 m from 1980 to 2006 (26 years), so a drawdown of 0.86 /year.

Determination of Shallow Ground Water Table in the Bangkok Clay using Seismic Refraction

2020 ◽  
Author(s):  
K. Sangprasat ◽  
R. Onsibut ◽  
P. Barbier ◽  
F. Levitre ◽  
B. Amante ◽  
...  
Keyword(s):  
Ground Water ◽  
Water Table ◽  
Seismic Refraction ◽  
Ground Water Table

GEOPHYSICAL METHODS ADAPTED TO HIGHWAY ENGINEERING PROBLEMS

Geophysics ◽  
1952 ◽  
Vol 17 (3) ◽  
pp. 505-530 ◽  
Author(s):  
R. Woodward Moore
Keyword(s):  
Seismic Refraction ◽  
Geophysical Methods ◽  
Engineering Structures ◽  
Highway Engineering ◽  
Earth Resistivity ◽  
The Earth ◽  
Ore Bodies ◽  
Geophysical Surveys ◽  
Engineering Problems ◽  
Test Use

Of the several geophysical methods used in exploration for oil and useful ore bodies, the earth‐resistivity and seismic‐refraction tests have been found to be the most adaptable to the shallow tests generally required in highway construction work. Of these, the earth‐resistivity test is the faster and has a wider range of application to highway problems than does the seismic test. Use of both methods of tests in subsurface explorations for engineering structures is expanding. The paper cites a growing need for a more thorough subsurface investigation of all engineering structure sites and gives examples of field data obtained by the Bureau of Public Roads when making preliminary geophysical surveys of proposed highway locations or structure sites. The economic aspects and the advantages and limitations of the two methods of test are discussed with particular reference to their application to highway engineering problems.

scholarly journals Regenerative Food Systems to Restore Urban-Rural Relationships: Insights from the Concepción Metropolitan Area Foodshed (Chile)

2019 ◽  
Vol 11 (10) ◽  
pp. 2892 ◽  
Author(s):  
Ana Zazo-Moratalla ◽  
Isidora Troncoso-González ◽  
Andrés Moreira-Muñoz
Keyword(s):  
Metropolitan Area ◽  
Food Systems ◽  
Metropolitan Areas ◽  
Local Food Systems ◽  
Food Traceability ◽  
Methodological Tool ◽  
Urban Rural ◽  
Key Aspects ◽  
The City ◽  
Shed Light

Cities, in recent years, have seen their functional and metabolic relationships with their agrarian hinterland being either broken off completely or substantially damaged. Within this context, Local Food Systems (LFS) can play a key role in restoring the supply relationships under regenerative assumptions. This paper analyses LFS within the Concepción Metropolitan Area (CMA) as a representative case of Metropolitan Areas in Chile. The aim of the paper is to evaluate whether LFS are regenerating sustainable rural-urban relationships, and to accomplish this goal, foodsheds have been used as a methodological tool to both characterise and represent food traceability. For this purpose, three quantitative foodshed indicators have been applied and three qualitative spatial analytical categories of the Regenerative Food Systems (RFS) defined to decode the behaviour of LFS in the CMA. The proposed method has been successful as an initial exploratory attempt to characterize the regenerative potential of RFS. The results highlight that LFS in the CMA are certainly restoring relationships between the city and its surrounding farmland by establishing new and renewed supply linkages. Further, the application of this method has shed light on some key aspects that show how an LFS is being converted into a potential RFS.

SOME RESULTS OF GEOPHYSICAL PROSPECTING CONDUCTED FOR THE GEOLOGICAL SURVEY OF INDIA FROM 1945–1948

Geophysics ◽  
1950 ◽  
Vol 15 (4) ◽  
pp. 704-731
Author(s):  
G. Dessau
Keyword(s):  
Electrical Resistivity ◽  
Spontaneous Polarization ◽  
Geological Survey ◽  
Foundation Engineering ◽  
Geophysical Prospecting ◽  
Geophysical Surveys ◽  
Engineering Problems ◽  
Geophysical Investigations ◽  
The Many ◽  
Geological Background

The methods used and some results obtained from geophysical investigations conducted by the Geophysical Section of the Geological Survey of India from 1945–1948 are presented. The many difficulties encountered in obtaining the proper instruments necessitated the widespread use of equipment made by the Section. This is one of the reasons why electrical resistivity and spontaneous polarization methods were employed in preference to others. The majority of the geophysical surveys during this three year period were concentrated in the search for minerals, water supplies, and in the solution of foundation engineering problems. The emphasis on these phases of geophysical prospecting rather than on oil surveys was necessary because, of the types of equipment available, as well as the priority assigned to these projects. Two spontaneous polarization, two magnetic, and two resistivity surveys are described, in addition to one carried out jointly by electrical and seismic methods. The geological background of these investigations are also briefly mentioned together with some details of the equipment used.

Sign in / Sign up

Export Citation Format

Share Document