Zahra Hejazizadeh; Mohammad Hossein Naserzadeh
Volume 17, Issue 66 , August 2008, , Pages 14-18
Abstract
Tsunami is a natural phenomenon that can not be prevented from occurring and is considered as one of the most important oceanic disasters in the world. In this collection, along with providing a definition of it, the types and causes of its occurrence are presented and, according to its geographical ...
Read More
Tsunami is a natural phenomenon that can not be prevented from occurring and is considered as one of the most important oceanic disasters in the world. In this collection, along with providing a definition of it, the types and causes of its occurrence are presented and, according to its geographical distribution in the oceans and places affected by the subduction, some special sites are introduced and, according to its destructive results, it has been attempted, through making suggestions, to take measurements for places that are located along the coastline of the subduction by the way of presenting information about its effects, in order to anticipate the potential risks and possible damages. Considering that in the southern part of Iran, there is the coastline subduction of the Oman Sea and the tectonic of the Indian Ocean, there are potentials for such an incident.
Zahra Hejazi Zadeh; Saeed Negahban
Volume 16, Issue 61 , May 2007, , Pages 47-49
Abstract
In this research, we tried to identify the relationship between population areas of Fars province and climatic conditions of different regions of the province. Therefore, at first, different air masses affecting the climate of the province were identified. These masses include the northern, western, ...
Read More
In this research, we tried to identify the relationship between population areas of Fars province and climatic conditions of different regions of the province. Therefore, at first, different air masses affecting the climate of the province were identified. These masses include the northern, western, southern (masses) and local winds. Then, after identifying the type of climate in different regions and analyzing the population dispersion statistics, the relationship between population dispersion and climate conditions was identified. Finally, it was determined that the central regions of Fars province had greater population densities than other areas of the province due to suitable climatic conditions (rainfall, temperature, etc.).
Zahra Hejazizadeh; Zeinolabedin Ja'farpour; Nader Parvin
Volume 13, Issue 50 , August 2004, , Pages 57-61
Abstract
Since immemorial past, drought has been one of the dangerous natural disasters for human life. As it is seen in historical texts, this phenomenon has always caused many social-economic changes, such as wars, famine and immigration. In this research, the wet and dry periods of some of meteorological stations ...
Read More
Since immemorial past, drought has been one of the dangerous natural disasters for human life. As it is seen in historical texts, this phenomenon has always caused many social-economic changes, such as wars, famine and immigration. In this research, the wet and dry periods of some of meteorological stations of Lake Urmia Basin, located in the northwest of Iran, have been analyzed. For this purpose, first the stations of Urmia, Tabriz, Saqez and Miandoab have been normalized using yearly methods. In other words, the precipitation was turned into a standard score (Z-Score). Then, the intensity of either of dry and wet periods was defined in two classes: weak to average dry (-1.5 <z <-0.5), severe dry (z<-1.5), weak to average wet (+0.5 <z <+1.5) and extreme wet (z> +1.5). In addition, the roughly normal period (-0.5 <z <+ 0.5) was considered as a period neither significantly wet nor suffering from drought. In the next step, a Run Test was performed on monthly precipitation data and their homogeneity was confirmed. Subsequently, using time series method (SARIMA), the monthly precipitation of these stations was modeled and predicted for the future (based on the most appropriate model) until 2002. Finally, according to the predicted values, the degree of severity of the year’s wet-or-dryness has been determined. The results of the study show that the annual precipitation of this basin in the years 2001 and 2002 is almost normal and will be accompanied by an upward trend and exit the state of drought.
