Geographic Information System-Based Seismic Risk Assessment for Dubai, UAE: A Step toward Resilience and Preparedness

Soil is both an important sink and a source for contaminants in the agricultural ecosystem. To research the sources and ecological risk of potentially toxic elements in Xiangzhou, China, 326 soil samples from arable land were collected and analyzed for five potentially toxic elements: cadmium (Cd), mercury (Hg), arsenic (As), lead (Pb), and chromium (Cr). In this research, ecological risk assessment was used to determine the degree of contamination in the research area, the outcome of the Geographic Information System was as used to study the spatial distribution characteristics of potentially toxic elements, and random forest was used to evaluate the natural and artificial influencing factors. We surveyed the sources of potentially toxic elements through quantifying the indicators, which gave further opinions. The results were as follows: (1) The average contents of potentially toxic elements were 0.14 mg/kg (Cd), 0.05 mg/kg (Hg), 12.33 mg/kg (As), 28.39 mg/kg (Pb), and 75.21 mg/kg (Cr), respectively. The results compared with the background value of Hubei, neighboring regions, and countries for Cd, As, Pb, and Cr showed mild pollution. (2) The total evaluation of soil pollution via the comprehensive pollution index indicated slight contamination by Cd. Assessment by the potential ecological risk index indicated low ecological risk due to Cd and moderate contamination by Hg. Evaluation through the geo-accumulation index evinced the low ecological risk for Cd, As, and Pb and moderate contamination by Hg. (3) We found that in addition to natural factors (such as soil parent material, soil pH, etc.), long-term industrial pollution, mineral mining and processing, exhaust emissions from transportation, the application of manure from farms as farmyard manure, and sewage irrigation were the primary anthropogenic sources of potentially toxic element contamination in the soil.

Download Full-text

PRACTICAL IMPLEMENTATION OF GEOGRAPHIC INFORMATION SYSTEM WITH SUPPORT FOR MODELING THE EFFECTS OF DANGEROUS NATURAL AND MAN-MADE PROCESSES

Геология и геофизика Юга России ◽

10.23671/vnc.2018.2.14354 ◽

2018 ◽

Author(s):

Д.А. Мельков ◽

А.С. Кануков

Keyword(s):

Information System ◽

Geographic Information System ◽

Seismic Risk ◽

Functional Model ◽

Geographic Information ◽

Economic Losses ◽

Soil Conditions ◽

Practical Implementation ◽

The Republic ◽

North Ossetia

На основе современных технологий разработана структурно-функциональная модель «Информационная система обеспечения градостроительной деятельности». Данная модель использована в качестве основы для создания моделирующей геоинформационной системы. При этом в виде отдельного структурного элемента в систему интегрирована информационная база данных о сейсмичности и сейсмических рисках, включающая в себя карты детального сейсмического районирования (ДСР) Республики Северная Осетия-Алания и карты сейсмического микрорайонирования территории населенных пунктов – административных центров Республики Северная Осетия-Алания. Рассмотрены методы оценки возможных социальных и экономических потерь от возможных землетрясений различной интенсивности и разработана методика оценки сейсмического риска. На их основе, предложен алгоритм «внедрения» (введения) методики оценки сейсмического риска в информационные системы обеспечения градостроительной деятельности. Использование разработанной методики оценки сейсмического риска территории позволяет непосредственно рассчитать рейтинг грунтов и сейсмический риск территории. На территории г. Владикавказа выделены участки с различными грунтовыми условиями. На основе имеющихся данных создан ГИС-проект «База данных геологической информации территории г. Владикавказа», включающий информацию о пробуренных на территории города скважинах и составе соответствующих грунтов. Данная база интегрирована во вновь разработанную систему, что позволяет использовать её в качестве одного из основных источников информации в задачах моделирования ожидаемых последствий опасных природно-техногенных процессов On the basis of modern technologies developed structural-functional model « Information system for urban planning». This model is used as a basis for creating a modeling geographic information system. At the same time, an information database on seismicity and seismic risks is integrated into the system as a separate structural element, includes maps of detailed seismic zoning (DSR) of the Republic of North Ossetia-Alania and maps of seismic micro – zoning of the territory of settlements-administrative centers of the Republic of North Ossetia-Alania. The methods of estimation of possible social and economic losses from possible earthquakes of different intensity are considered and the method of seismic risk assessment is developed. On their basis, the algorithm of "introduction" of a technique of an assessment of seismic risk in information systems of providing town-planning activity is offered. The use of the developed methodology for assessing the seismic risk of the territory allows you to directly calculate the soil rating and seismic risk of the territory. On the territory of Vladikavkaz allocated areas with different soil conditions. Based on available data created the GIS project "Database of geological information of the Vladikavkaz city territory ", which includes information about wells drilled on the city territory and the composition of the respective soils. This database is integrated into the newly developed system, which allows to use it as one of the main sources of information in the problems of modeling the expected consequences of dangerous natural and man-made processes.

Download Full-text

THE APPLICATION OF GEOGRAPHIC INFORMATION SYSTEM IN DENGUE HAEMORRHAGIC FEVER RISK ASSESSMENT IN SAMUT SONGKHRAM PROVINCE, THAILAND

International Journal of Geomate ◽

10.21660/2017.30.160601 ◽

2017 ◽

Vol 12 (30) ◽

Cited By ~ 1

Author(s):

Tanawat Chaiphongpachara

Keyword(s):

Risk Assessment ◽

Information System ◽

Geographic Information System ◽

Geographic Information ◽

Dengue Haemorrhagic Fever ◽

Haemorrhagic Fever

Download Full-text

Debris Flow Risk Mapping Based on GIS and Extenics

10.5194/nhess-2018-147 ◽

2018 ◽

Author(s):

Wenbo Xu ◽

Xueru Zhang ◽

Yangjuan Zou ◽

Chunyu Zhang ◽

Siyu Liu

Keyword(s):

Risk Assessment ◽

Information System ◽

Geographic Information System ◽

High Risk ◽

Debris Flow ◽

Large Scale ◽

Strong Support ◽

Geographic Information ◽

Sichuan Province ◽

Very High

Abstract. Debris flow, a very dangerous natural disaster, frequently occurs in mountainous areas of Sichuan province. China. Here, we applied the extenics method, which is normally used in single debris flow risk assessment, towards a large-scale debris flow risk assessment for the first time, and built the classical matter elements and joint domain matter elements for assessment of the debris flow risks in Sichuan province. Eight factors, including relative elevation, slope, rock hardness, rainfall, gully density, vegetation coverage, occurrences of historical debris flow and historical earthquake occurrences were selected for debris flow assessment by using geographic information system technology and weight analysis approach. Based on the risk assessment, the debris flow risk map was generated. Results indicate that areas with high risk and very high risk accounted for 21.32 % and 14.35 % of the whole province, respectively. 76 % of the verification points fall within the moderate, high and very high risk areas, suggesting high accuracy of extenics method in large-scale assessment areas. Thus, the Geographic Information System (GIS) and extenics based methods could provide a strong support for debris flow management in the region.

Download Full-text