Hasanali Faraji Sabokbar; Morteza Zera'ati
Volume 17, Issue 66 , August 2008, , Pages 24-31
Abstract
Undoubtedly, the flood is known as a natural disaster, but in practice, the flood is one of the most terrible natural disasters in the world in both terms of mortality and financial losses. Between 1988 and 1997, around 390,000 people were killed in natural disasters around the world, 58% of whom were ...
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Undoubtedly, the flood is known as a natural disaster, but in practice, the flood is one of the most terrible natural disasters in the world in both terms of mortality and financial losses. Between 1988 and 1997, around 390,000 people were killed in natural disasters around the world, 58% of whom were related to flood, 26% were affected by earthquake, and 16% victims of hurricanes and other disasters. Total damage over the past 10 years was about $ 700 billion, of which 33, 29, and 28 per cent were related to flood, storm and earthquakes, respectively. In this regard, a worrying issue has been the increasing trend of mortality and flood damage in the world in recent decades. The phenomenon of flood in Iran is considered as the most harmful natural disaster whose damages account for more than 70% of the whole natural disasters. Increasing population and assets in floodplains, hydrosystem changes and destructive effects of human activities have been among the main reasons for this trend. Today, with the development of information technology, much emphasis has been put on the use of GIS to model and assess the dangers and damage caused by floods. The high speed and precision of these systems, their vast coverage and multi-aspect nature, and their ease of use and low cost have made them more and more utilized in managing the flood crisis. In this paper, we tried to use the GIS technique in managing the flood risk crisis in Kashan area.
Ali Shakur; Raf'at Shokri; Morteza Zera'ati
Volume 16, Issue 64 , February 2008, , Pages 19-24
Abstract
City is considered as one of the human-made phenomena in the environment, created with the aims of settlement, livelihood provision, social and economic relations and so on, but these are not considered as urban aims. The man has provided his own environment and has begun to live in it. Cities should ...
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City is considered as one of the human-made phenomena in the environment, created with the aims of settlement, livelihood provision, social and economic relations and so on, but these are not considered as urban aims. The man has provided his own environment and has begun to live in it. Cities should be based on the role and responsibilities they have in their region, and be developed in all aspects in a manner that minimizes their negative effects. Therefore, urban planning needs to be implemented in such a way that settlements and organizational patterns and the type of human activities be looked upon as a large community. Therefore, the main goal is based on the principle that urban planning be coherent. The urban hierarchy, according to a definition, is the classification of cities located in a geographical area based on population indices and the importance of their official functions, so that they can be categorized into different groups by calculation and measurable order. As we know, urban hierarchy is uneven in many provinces of our country, and there are many differences between cities in terms of ranking according to indicators. The cities of Fars province do not have regular hierarchies, and certain causes and factors have lead these hierarchies to be problematic. In this research, the urban hierarchy of Fars province has been studied based on three different patterns, the results have been compared with each other, and its hierarchy has been determined and some strategies to improve its ranking have been presented.