scholarly journals GEOSTATISTICAL SEISMIC ANALYSIS AND HAZARD ASSESSMENT; UNITED ARAB EMIRATES

2018 ◽  
Vol XLII-3/W4 ◽  
pp. 29-36 ◽  
Author(s):  
D. Al-Dogom ◽  
K. Schuckma ◽  
R. Al-Ruzouq
Keyword(s):  
Seismic Hazard ◽  
United Arab Emirates ◽  
Geographical Information Systems ◽  
Seismic Analysis ◽  
Mitigation Strategies ◽  
Geographical Information ◽  
Arabian Plate ◽  
Spatial Pattern Analysis ◽  
Ground Acceleration ◽  
Very High

<p><strong>Abstract.</strong> Assessing and analyzing the spatial distribution of earthquake events aids in identifying the presence of clustering and reveals hot and cold spots across the study area. Combining the spatial analysis of earthquake events with other geographical and geophysical parameters leads to more understanding of the vulnerability of critical infrastructure and the demographics of the affected population. This study will use Geographical Information Systems (GIS) to examine the spatiotemporal occurrence of earthquake events throughout the Arabian plate and their effect on the United Arab Emirates (UAE). Spatial pattern analysis techniques, including Moran I and Getis–Ord Gi*, were applied to 115 years of earthquakes (1900&amp;ndash;2015) that have occurred throughout the Arabian plate. The directional distribution (standard deviational ellipse) of earthquake magnitudes was analyzed to determine the spatial characteristics and the directional tendency of the earthquakes throughout the Arabian plate. Afterword, geophysical parameters of UAE, specifically Peak Ground Acceleration (PGA), fault line distance, slope, soil type, and geology were ranked, weighted based on its contribution and combined using an Analytic Hierarchy Process (AHP) to identify and locate seismic hazard zones. The resulted Seismic Hazard Zonation Map (SHZM) was classified to five hazard zones ranging from very high to very low. It has been found that Fujairah city sited in the “very High” zone, Sharjah and Dubai cities located from “High” to moderate zones while Abu Dhabi city stands relatively far from seismic hot spots and major faults and placed in the low seismic hazard zone. The results of this study could help improve urban planning and emergency mitigation strategies in UAE.</p>

scholarly journals Probabilistic seismic hazard assessment of the historical peninsula of Istanbul

2012 ◽  
Vol 12 (11) ◽  
pp. 3483-3493 ◽  
Author(s):  
G. Ç. Ince
Keyword(s):  
Seismic Hazard ◽  
Geographical Information Systems ◽  
Ground Movement ◽  
Geographical Information ◽  
Peak Ground Velocity ◽  
Exceedance Probability ◽  
Probabilistic Seismic Hazard Assessment ◽  
Spectral Acceleration ◽  
Ground Acceleration ◽  
Acceleration Parameter

Abstract. In order to design buildings that are resistant to earthquakes, first it is necessary to determine the parameters of ground motion. In this study, the earthquake seismic hazard analysis of the Old City Districts of Istanbul (Fatih and Eminonu) was probabilistically defined. For the analysis, the study zone was divided into 307 cells of 250 × 250 m using geographical information systems, and these cells were used in the mapping of all the data obtained. Then, for a building lifetime of 50 yr, the acceleration parameters of earthquake ground motions, peak ground acceleration, peak ground velocity, and spectral acceleration values of 0.2 s and 1 s were obtained at the bedrock level according to 10% and 40% exceedances. Additionally, in order to produce the artificial acceleration-time records of the ground movement in accordance with the NEHRP acceleration spectrum, the TARSCHTS computer simulation program was utilized. The results of the analysis showed that for the 10% probability of exceedance, the peak bedrock acceleration values ranged from 0.30 g to 0.40 g, and for the 40% exceedance probability the acceleration values ranged from 0.22 g to 0.17 g. The Ss 10% exceedance probability, calculated according to the spectral acceleration parameter, ranged from 0.67 g to 0.85 g and the spectral acceleration parameter S1 varied between 0.22 g–0.28 g. The Ss 40% exceedance probability, calculated according to the spectral acceleration parameter, ranged from 0.46 g to 0.38 g and the spectral acceleration parameter S1 varied from 0.12 g to 0.14 g.

scholarly journals Analogue aerial-photopraphs external orientation reconstruction based on geoportal data

2011 ◽  
Vol 30 (3) ◽  
pp. 13-18
Author(s):  
Piotr Dzieszko
Keyword(s):  
Information Systems ◽  
High Resolution ◽  
Data Acquisition ◽  
Geographical Information Systems ◽  
Fast Growth ◽  
Geographical Information ◽  
Source Data ◽  
Effective Choice ◽  
Field Works ◽  
Very High

Analogue aerial-photopraphs external orientation reconstruction based on geoportal data For acquisition of source data for geoinformation analyses is necessary to do some field works. This way of data acquisition is time-consuming. In this case, photogrammetric and remote sensed methods can be more effective choice. Especially orthophotomap extracting is more effective process in creation of geodata. It is good foundation for further analysis and nice extension of existing geographical information systems. Despite fast growth of photogrammetry there are plenty of analogue, archival airphotos which can be used for geoinformation analysis. They are quiet up to date and scanned in very high resolution which means they can be used for really reliable analysis. The problem is very important because many of analogue, archival air photos do not contain photogrammetric warp. The aim of this paper is expression of applicability of geoportal webpage, which is part of INSPIRE directive, that can be used for external orientation reconstruction when there is no other georeference data.

scholarly journals GIS Models for Vulnerability of Coastal Erosion Assessment in a Tropical Protected Area

2021 ◽  
Vol 10 (9) ◽  
pp. 598
Author(s):  
Luís Russo Vieira ◽  
José Guilherme Vieira ◽  
Isabel Marques da Silva ◽  
Edison Barbieri ◽  
Fernando Morgado
Keyword(s):  
Vulnerability Assessment ◽  
Protected Area ◽  
Coastal Erosion ◽  
Geographical Information Systems ◽  
Multidisciplinary Approach ◽  
In Situ Monitoring ◽  
Geographical Information ◽  
Estuarine System ◽  
Very High

Coastal erosion is considered a major worldwide challenge. The vulnerability assessment of coastal areas, in relation to climate change, is a key topic of worldwide increasing interest. The integration of methodologies supported by Remote Sensing, Geographical Information Systems (GIS) and in situ monitoring has allowed a viable identification of vulnerable areas to erosion. In the present study, a model was proposed to the assessment of the estuarine system of Cananéia-Iguape (Brazil), by applying the evaluation and prediction of vulnerability models for the conservation and preservation of mangroves. Approximately 1221 Km2 were classified, with 16% of the total presenting high and very high vulnerability to erosion. Other relevant aspects, were the identification and georeferencing sites that showed strong evidence of erosion and, thus, having a huge influence on the final vulnerability scores. The obtained results led to the development of a multidisciplinary approach through the application of a prediction and description model that resulted from the adaptation of the study system from a set of implemented models for coastal regions, in order to contribute to the erosion vulnerability assessment in the mangroves ecosystems (and associated localities, municipalities and communities).

Nisqually Earthquake Electric Utility Analysis

2006 ◽  
Vol 22 (2) ◽  
pp. 491-509 ◽  
Author(s):  
Jaewook Park ◽  
Nobuoto Nojima ◽  
Dorothy A. Reed
Keyword(s):  
Distribution System ◽  
Geographical Information Systems ◽  
Systems Approach ◽  
Electric Utility ◽  
Geographical Information ◽  
Peak Ground Velocity ◽  
Utility Analysis ◽  
Ground Acceleration ◽  
Earthquake Scenario ◽  
Utility Distribution

The performance of an urban electric utility distribution system was evaluated for the February 2001 Nisqually earthquake. The restoration rate of the lifeline following the event was determined; the distribution of outage durations was estimated; and correlations between lifeline damage and instrumental Modified Mercalli intensity, peak ground velocity, and peak ground acceleration values were ascertained using a GIS (geographical information systems) approach. Using a logit regression analysis, a fragility curve was developed for the lifeline in a manner similar to O'Rourke's formulation of water-line performance (O'Rourke et. al. 2000). Extrapolation of the model to the Seattle Fault earthquake scenario was made to demonstrate its feasibility for prediction.

scholarly journals Mapping malaria risk using environmental and anthropic variables

2009 ◽  
Vol 12 (3) ◽  
pp. 338-354 ◽  
Author(s):  
Mauricio Edilberto Rincón-Romero ◽  
Julián Esteban Londoño
Keyword(s):  
Geographical Information Systems ◽  
Malaria Risk ◽  
Geographical Information ◽  
Moderate Risk ◽  
Distributed Modeling ◽  
Modeling Techniques ◽  
Risk Areas ◽  
Mapping Techniques ◽  
Climatic Information ◽  
Very High

Despite much research in the identification of areas with malaria, it is urgent to further investigate mapping techniques to achieve better approaches in strategies to prevent, mitigate, and eradicate the mosquito and the illness eventually. By using spatial distributed modeling techniques with Geographical Information Systems (GIS), the study proposes methodology to map malaria risk zoning for the municipality of Buenaventura in Colombia. The model proposed by Craig et al.¹ using climatic information was adapted to the conditions of the study area regarding scale and spatial resolution. Geomorphologic and anthropic variables were added to improve spatial allocation of areas with higher risk of contracting the illness, refining zoning. Then, they were contrasted with the locations reported by health entities², taking into account spatial distribution. The comparison of results shows a decrease in the area obtained initially using the Craig et al. model¹ (1999), from 5,422.4 km² (89.1% of the municipality's territory) to 624.3km² (approximately 10% of the municipality's area), yielding a total reduction of 78.8% when environmental and anthropic variables were included in the model. Data show that of the 9,863 cases reported during 2001 to 2005 for 20 selected towns as basis for the amount of surveyed malaria cases², 1,132 were located in the very high-risk areas, 7,662 were in the areas of moderate risk, and 1,066 cases in low-risk areas, showing that 89% of the cases reported fell into the areas with higher risk for malaria.

scholarly journals Review of Seismic Characteristics in Erbil City, the Capital of the Kurdistan Region of Iraq

2019 ◽  
Vol 9 (2) ◽  
pp. 161-170
Author(s):  
Zina A. AbdulJaleel ◽  
Bahman O. Taha
Keyword(s):  
Seismic Hazard ◽  
Return Period ◽  
Seismic Hazard Assessment ◽  
Normal Fault ◽  
World Health ◽  
Arabian Plate ◽  
Ground Acceleration ◽  
Site Class ◽  
Class D ◽  
Seismic Characteristics

Erbil city essentially suffers from the risk of earthquakes generated by Zagros-Taurus Belt. The central objective of this study is to identify the seismic characteristics and required seismic parameters for structural analysis. The methodology concentrated on reviewing the seismology and geology of Erbil city. It was concluded that the tectonically classified by an outer platform of the low folded zone in the position of Western Zagros Fold-Thrust Belt of the Arabian plate, geologically covered by Quaternary sediments and lithologically described by fluvial sediments, and the dynamic soil properties classified by site Class D. Seismicity review indicated that the seismic source is characterized by strike-slip (normal) fault and majority events exhibit at the shallow crustal with expected moment magnitude between 6 and 7.5. It was observed that the peak ground acceleration (PGA) has been updated, especially after the last cyclic earthquake in the region. The summary of the previous seismic hazard indicates that the PGA according to the World Health Organization, Global Seismic Hazard Assessment Program, and Uniform building code is identified by the value higher than 0.3 g for 475 years return period, while according to national probabilistic seismic hazard analysis studies in Iraq and Arabian Peninsula is identified by 0.4 g for 2% probability of exceedance in 50 years (2475 years return period), and estimated PGA to be 0.25 g for 10% likelihood of exceedance in 50 years (475 years return period), in a term of 5% damped at bedrock condition. Proposed spectral acceleration (Sa) in Erbil city at 0.2 and 1.0 s evaluated to be 1.0 g and 0.53 g, for the site Class D and compared with Sa in the literature.

scholarly journals ESTIMACIÓN DEL RIESGO SÍSMICO EN CASTILLA - LA MANCHA PARA LA ELABORACIÓN DEL PLAN ESPECIAL DE EMERGENCIAS

2017 ◽  
Author(s):  
Rocío Romero Jarén ◽  
Ligia Quirós ◽  
Fernando Sorondo ◽  
Belén Benito
Keyword(s):  
Seismic Hazard ◽  
Seismic Risk ◽  
Geographical Information Systems ◽  
Seismic Event ◽  
Geographical Information ◽  
Return Periods ◽  
Emergency Plans ◽  
La Mancha ◽  
Emergency Programme ◽  
Multidisciplinary Group

An estimation of the seismic risk in Castilla - La Mancha (Spain) is set forth in the current work, in order to develop the special emergency programme. To carry out the study it has been necessary to define a multidisciplinary group of experts in each involved discipline: geology and tectonics, seismology, architecture, engineering and geographical information systems. The main aim is to develop different seismic risk maps to provide the basis to elaborate the emergency plans in Castilla - La Mancha. These plans must follow the stipulated guidelines in the seismic risk field. A probabilistic methodology is adopted to define the seismic risk, considering this as the human and material losses in presence of the expected seismic event. The seismic hazard of the area of study is evaluated through return periods of 475 and 975 years, equivalents to exceedance probabilities of 10% and 5% in 50 years respectively. These probabilities are proposed in the framework of the Spanish seismic code “Normativa Sismorresistente Española, NCSE-02”, for conventional and special buildings. In a first approach, the study attempt to estimates the expected losses in each city of the overall of Castilla - La Mancha in the presence of the probable movements in 50 and 100 years. The results allow us to make a relative estimation of the seismic risk in different areas, identify those cities which undergo highest damages indexes and which ones would require a more in-depth assessment so as to mitigate the risk. Besides, the results contribute to establish objective priorities to define emergency plans at city scale.http://dx.doi.org/10.4995/CIGeo2017.2017.6670

scholarly journals Probabilistic Seismic Hazard Assessment for Amaravathi Region, Andhra Pradesh

2019 ◽  
Vol 8 (6S4) ◽  
pp. 279-283
Keyword(s):  
Seismic Hazard ◽  
Ground Motion ◽  
Seismic Analysis ◽  
Response Spectrum ◽  
Seismic Hazard Assessment ◽  
Prediction Equation ◽  
Probabilistic Seismic Hazard Assessment ◽  
Ground Acceleration ◽  
Uniform Hazard Response Spectrum ◽  
Seismic Hazard Map

This article explains an analytical attempt that estimates seismic hazard for Amaravathi city. The present study has been carried out contemplating the available faults and epicentral data within a radius of 300km of the Amaravathi region. The homogenous earthquake catalogue has been prepared for Amaravathi region by Steep’s method. The seismic hazard parameters ―a‖ and ―b‖ for Amaravathi city were evaluated by Gutenberg-Ritcher method. The ―a‖ and ―b‖ values obtained as 4.69, 0.6468 respectively. The total 353 epicenters and 31 faults were considered in this seismic analysis for the estimate of PSHA for Amaravathi. The ground motion produced by the faults at this site has been estimated by using the regionspecific Ground Motion Prediction Equation (GMPE) developed by the raghukanth and lyenger (2007). The probability of occurrence of different magnitude classes was estimated. The hazard curves and mean annual rate of exceedance for Peak Ground Acceleration were calculated by using ground motion estimated in this area. The Uniform Hazard Response Spectrum (UHRS) for the ranging time periods between 0.1 – 4 seconds was prepared. PGA values for Amaravati region was found to be in between 0.001g to 0.3g from seismic hazard map that was prepared in this study

scholarly journals Coastal Vulnerability of the West Coast of Aceh Besar: A Coastal Morphology Assessment

2021 ◽  
Vol 9 (8) ◽  
pp. 815
Author(s):  
Muhammad Irham ◽  
Ichsan Rusydi ◽  
Haekal A. Haridhi ◽  
Ichsan Setiawan ◽  
Yopi Ilhamsyah ◽  
...  
Keyword(s):  
West Coast ◽  
Geographical Information Systems ◽  
Vulnerability Index ◽  
High Elevation ◽  
Sandy Beaches ◽  
Geographical Information ◽  
Coastal Vulnerability ◽  
The West ◽  
Coastal Morphology ◽  
Very High

The purpose of this study was to determine how vulnerable the west coast of Aceh Besar, Aceh province, Indonesia, is in terms of its coastal morphology. This research was conducted from August to December 2020 and data processing was carried out at the Geographical Information Systems Laboratory, Faculty of Marine Affairs and Fisheries, Syiah Kuala University. The method used was the coastal vulnerability index (CVI) with four geological parameters, namely geomorphological parameters, beach elevation, beach slope and shoreline changes. The results obtained from the CVI method show that 20.60% of the west coast of Aceh Besar, which has a total coastline length of 93.2 km, is in the very high vulnerability category (19.2 km), while 23.18% (21.6 km) is in the high vulnerability category, 8.80% (8.2 km) in the moderate category, 6.44% (6 km) in the low category and 40.99% (38.2 km) in the very low category. Sub-districts classified as having very high vulnerability are Peukanbada (7.94%), Leupung (6.22%), Lhoong (4.94%), and Lhoknga (1.50%). The geomorphology of areas that have very high vulnerability is generally in the form of sandy beaches with a very gentle slope, while, geomorphologically, areas that have very low vulnerability have a high elevation and cliff beaches.

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