www.ijce-apm.com International Journal of Civil Engineering 1 IJCE, Volume 5, Issue 2 (2018) e-ISSN: 1694-2280 | p-ISSN: 1694-2396 Multi-Hazard Threat and Risk Imprints a Spatial form SWOT Analysis Maryam Marani-Barzani 1 , Kaveh Ostad-Ali-Askari *2 , Saeid Eslamian 3 , Shahide Dehghan 4 , Vijay P. Singh 5 , Mohsen Ghane 6 1 Department of Geography, University of Malaya (UM) ,50603 Kuala Lumpur, Malaysia. 2* Department of Civil Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran. 3 Full Professor, Department of Water Engineering, Isfahan University of Technology, Isfahan, Iran. 4 Department of Geography, Najafabad Branch, Islamic Azad University, Najafabad, Iran. 5 Full Professor, Department of Biological and Agricultural Engineering & Zachry Department of Civil Engineering, Texas A and M University, 321 Scoates Hall, 2117 TAMU, College Station, Texas 77843-2117, U.S.A. 6 Civil Engineering Department, South Tehran Branch, Islamic Azad University, Tehran, Iran. *Corresponding author: koa.askari@khuisf.ac.ir Abstract- Zayandeh Rood Basin, Iran is a basin with many environmental hazard threats. In last years, analysts have concentrated on building an extent of strategic responses to raise the ability of communities and businesses to control and meliorate from natural catastrophes. The experiment from each new tension adds further to the procedure of risk management. This article inspects how they belayed for, and recuperated from, the incident. Perhaps not astonishingly, it represents their exposures and absence of readiness for dealing with a risk of this dignity. Then again, it proves the resilience of real-world managers and their confidence on an aggregate experiment to operate their own improvement. In periods in which hazard management has been under drastic press to indicate effectiveness and cost- efficiency. These threats function in environmental disasters with terrible reaction such as damage of human properties, disruption to human livelihood activities and the bother imposed on economy. So, hazard management is essential for solution these repercussions. Moreover, multi- hazards are associated with desertification, earthquake, and aridity, similar any other nation, Iran is imperiled by many environmental risk menaces and such menaces can peak in environmental catastrophes with massive reactions such as loss of people’s lives, destruction of national assets, an outage of a man-made building, dangers overhanging mass population, etc. In this case, the integrated approach uses the Arc GIS to create individual map layers that describe the spatial distribution of a parameter describing the intensity of the hazards. In this study, the intensity of the hazards threat is classified into 5 classes based on scale. In last years, increasing population and development of settlements and life-lines over perilous zones have mostly increased the effect of natural catastrophes both in industrialized and developing countries. The classes and range values include ‘very high’, ‘high’, ‘moderate’, ‘low’ and finally ‘very low’. As the study area, the Zayandeh Rood Basin (Z.R.B) was selected into 10km grids. The parameters explain the hazard threats, their areal extents and densities, were determined for each grid. So, each layer map of a particular hazard and risk layer shows the spatial distribution of that particular hazard threat. In this research, each layer of the hazard threat and risk map was integrated using the Arc GIS integration analysis based on parameters. More importantly, the SWAT analysis shows the spatial distribution based on parameters of hazards and risk parameters in a grid cell, as well as showing the basin as the table whole that could result in efforts made to alleviate many hazards in the future. This approach in hazard management assessment would significantly contribute to any efforts associated to develop early warning systems incorporating hard and soft measures in a high- and very high-intensity hazard threat areas. This article evaluates some of the items relevant to the performance of diverse GIS conveniences with respect to terrain-related risks dominant in Isfahan, with specific reference to landslides Key words – Multi-Hazard, Risk imprints, SWAT Analysis, Environmental Management. I. INTRODUCTION Integrated Assessment (IA) is an interdisciplinary process comprised of combining, interpreting and communicating knowledge, in such a way that all the causes and effects in a problem can be evaluated from a synoptic perspective with two characteristics: (i) it needs to incorporate an added value compared to single disciplinary assessment; and (ii) it needs to provide decision makers with useful information [4][13]. Environmental risks at a location in space and time is not the function of a single threat parameter but is determined by many parameters. Some threat parameters exhibit less risk while others higher risks, but a cumulative value of all threat parameters provide a more exact state of risk for a particular location in space and time. The challenge here is to determine what constitute the pertinent threat parameters of a location. This study identifies 4 main environments threat parameters that could exact risks in a particular location. The threat parameters are, (1) earthquake potential, (2) desertification and (3) Aridity. Each of these threat parameters constitutes an individual layer of hazard threat and when combined through an integration process a composite hazards threat for a particular location is determined by integrating the composite hazard threat and inherent risks in that location. This defines the integration and multi- layer analysis of risks of the study. Risk can be defined as a function of hazard probability and vulnerability, the latter resulting from a combination of exposure and ability to cope [15]. In addition, mapping, as well as assessment, of hazard