Reservoir Loading and Local Earthquakes

Carder, Dean S.

doi:10.1130/eng-case-8.51

Cited by 16 publications

(9 citation statements)

References 2 publications

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“…Seismicity triggered by large water reservoirs was observed for the first time at Lake Mead in the United States (Carder 1970). Seismic activity has been associated with additional loading of water weight on existing geo-stress background and decreasing effective normal stress at the fault surface due to increasing pore pressure in surface rock (Rajendran et al 2012), but the mechanisms are not yet fully understood (Lerer and Scudder 1999;Simpson 1986).…”

Section: Seismicitymentioning

confidence: 98%

Water resource developments in Ethiopia: potential benefits and negative impacts on the environment, vector-borne diseases, and food security

et al. 2014

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To satisfy the growing demand for electricity, Ethiopia plans to increase its electricity production five-fold between 2010 and 2015, mainly through the construction of dams. A literature review shows that while dams can boost power and agricultural production, promote economic development, and facilitate flood control, they can also lead to environmental, ecological, and socioeconomic changes. Several case studies show that dams may alter the composition and density of vectors and intermediate host species, increase the incidence of malaria schistosomiasis and possibly lymphatic filariasis, and lead to eutrophication of reservoirs, soil erosion, and earthquakes. There is evidence that dams and commercial irrigation schemes can increase soil and water degradation, vulnerability to drought, and food insecurity in riverine and lacustrine areas downstream of dams. It appears that dams in Ethiopia are also vulnerable to high soil erosion rates and earthquakes. Consequently, the current and proposed large-scale dam construction program in Ethiopia requires in-depth research to improve our understanding of the unintended negative effects of projects and to guide the location, design, and implementation of appropriate preventive and remedial programs.Résumé : Les auteurs présentent une revue de littérature montrant qu'en dépit du fait que les barrages peuvent favoriser les productions d'énergétiques et agricoles, promouvoir le développement économique et faciliter la maitrise des inondations, ils peuvent également provoquer des changements environnementaux, écologiques et socio-économiques. Plusieurs études de cas montrent que les barrages peuvent modifier la composition et la densité d'espèces hôtes vectrices et intermédiaires, augmenter l'incidence de la schistosomiase de la malaria et possiblement la filariose lymphatique, en plus de conduire à l'eutrophisation des réservoirs, à l'érosion du sol et aux tremblements de terre. Il y a des preuves à l'effet que les barrages et les systèmes d'irrigation commerciaux peuvent augmenter la dégradation de l'eau et des sols, la vulnérabilité à la sécheresse et l'insécurité alimentaire dans les régions riveraines et lacustres en aval des barrages. Il semble que les barrages en Éthiopie seraient également vulnérables à des taux élevés d'érosion du sol et aux tremblements de terre. Conséquemment, le programme actuel de construction de barrages à grande échelle en Éthiopie nécessite des recherches approfondies afin d'améliorer notre compréhension des effets négatifs collatéraux des projets et de guider la localisation, la conception et la mise en place de programmes de prévention et de remédiation.

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Section: Seismicitymentioning

confidence: 98%

Water resource developments in Ethiopia: potential benefits and negative impacts on the environment, vector-borne diseases, and food security

et al. 2014

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“…If triggered earthquakes occur, they will be along the Trà My -Trà Bong grade III fault zone and grade IV fault zone within reservoir basin (Fig.4) (Cao Ðinh Trieu et al, 2012;Carder, 1970;Gough and Gough, 1970;Snow, 1972;Gupta and Rastogi, 1976;Nur, 1978;Simpson et al 1988;Roeloffs, 1988;Gupta, 1992;Wells et al 1994;Gupta, 2012;Phan Trong Trjnh, 2012;Trinh Quoc Nghia, 2012). The Trà My -Trà Bong fault zone has a number of ruptured segments with high risks of earthquake occurrence of various degrees.…”

Section: Earthquake Activity In the St2 Regionmentioning

confidence: 99%

Triggered Earthquake Study in Tranh River No. 2 (Vietnam) Hydropower Reservoir

Trieu

Trong

Dung

et al. 2014

Journal of the Geological Society of India

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This article presents the results of investigating triggered earthquakes in the vicinity of Tranh River No.2 Hydropower Reservoir in recent years. It is found that earthquakes occurred in the vicinity of Tranh River Hydropower Reservoir, probably associated with the Trà My -Trà BÓng fault zone. It is estimated that this fault is capable of hosting an earthquake of M~6.1. The 'b' value for this earthquake sequence is 0.83, which is higher than the regional 'b' value of 0.60. We estimate that the return period of earthquakes of M=4.5, 5.0, 5.5 and 6.0 is 11, 29, 76 and 198 months respectively. On October 22, 2012 an earthquake M S =4.6, I 0 =6.0 (MSK-64) occurred at 13:41:28 hrs GMT. The epicenter of the earthquake was located at a distance of 5.5 km away from the center of the dam towards the west. The focal depth is about 4.5 km, and the rupture length is about 1.8 km.

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“…All records shown in Figs. 1 and 2 were processed on a computer according to the "Spectrum" program in which the method of J. Tukey [6] allowing accelerated calculation of spectra is used. The program was compiled by co-workers of the Institute of Physics of the Earth [7] and serves for calculating Fourier spectra of the form ?…”

Section: Velocitymentioning

confidence: 99%

Seismic loads on the foundations of hydraulic structures during strong earthquakes

Skorik¹

1988

Hydrotechnical Construction

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It is known that the degree of reliability of structures in the area of hydraulic engineering under conditions of construction in special regions with an increased hazard, for example, in earthquake hazard regions, is being investigated in the most different areas: in the area of mathematical and physical modeling, with a prObabilistic approach, method of calculating structures on the basis of accelerograms of known strong earthquakes (El Centro, Hyde Park, Olympia, Koyna, etc.), by the method of calculation based on specially constructed analog accelerograms, etc.It is completely obvious that of greatest interest is an analysis of real seismic records and especially of strong earthquakes recorded in the immediate vicinity of a hydraulic structure. Such records, in addition to primary practical interest, have also great methodological value. A comparison of the results of all indirect methods of establishing the character of the seismic load on a hydraulic structure with the data ofreal strong earthquakes presenting a direct danger will make it possible to develop a method of converting from the data of all other methods of evaluating the earthquake hazard to its real evaluation.Unfortunately, in world practice there is an insignificant number of records of earthquakes obtained on rock foundations in regions of large dams. This attests to the value of the data being used.In addition to the aforesaid, the examined data is of interest in the area of investigating the effects of a reservoir on a change in the seismic regime of the region of the hydro development. It has presently been established on the basis of the data of various authors that a reservoir can promote the occurrence of earthquakes in regions previously considered to be aseismic [i, 2], intensification of seismic activity in seismically active region [I, 2], and weakening of seismic activity that existed earlier [3,4]. The ambiguous results existing in this area indicate the complex role of a reservoir in the seismic regime and make it necessary to conduct appropriate investigations in each particular region.The earthquakes examined in this article occurred on January 10 and 13, 1975 six months after the start of filling of the reservoir of the Chirkey hydrostation.The region up to May 14, 1970, when an earthquake with an intensity of 8 according to the scale of the Institute of Physics of the Earth, Academy of Sciences of the USSR, occurred here, was considered an intensity 7 region. After the indicated earthquake and studies by a special commission that followed, a seismic activity of intensity 8 was established for the region.The 1975 earthquakes were recorded in two mutually perpendicular directions -horizontal N-S and vertical z. The APT-I accelerometers and S-5-S velocimeters, which recorded respectively the accelerations and velocities of the seismic oscillations, were used as the detectors. The natural frequencies of the pendulums for the S-5-S are fl = 0.2 Hz and for the APT-I f2 = 1500 Hz. The frequency band in which a uniform increase of ...

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Reservoir Loading and Local Earthquakes

Cited by 16 publications

References 2 publications

Water resource developments in Ethiopia: potential benefits and negative impacts on the environment, vector-borne diseases, and food security

Water resource developments in Ethiopia: potential benefits and negative impacts on the environment, vector-borne diseases, and food security

Triggered Earthquake Study in Tranh River No. 2 (Vietnam) Hydropower Reservoir

Seismic loads on the foundations of hydraulic structures during strong earthquakes

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