Abdolmotalleb Rezaei; Seyyed Mahmoud Hosseini; Ali Asadi
Abstract
Social network analysis used to study the relationship between stakeholders and actors in natural resource management has become a scientific approach. The purpose of this study was analysis of Information Exchange Network among organizations engage in the sustainable management of natural resources. ...
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Social network analysis used to study the relationship between stakeholders and actors in natural resource management has become a scientific approach. The purpose of this study was analysis of Information Exchange Network among organizations engage in the sustainable management of natural resources. Results of Social Network Analysis revealed that there is weak Relationship among organizations about information exchange in sustainable natural resource management and access to information in this network is very hard and there is medium communication potential among organizations. Also in information network of the organizations, Agricultural organization had high power in the whole network. University, Agricultural organization and Research Center for Agriculture and Natural Resources have important role in facilitating of information exchange. Analysis of regularity process and its relationship with information exchange network revealed that forests, range and watershed management organization has more power than other organizations.
Ebrahim Omidvar; Ataollah Kavian
Abstract
Landslides are the major natural hazard, causing significant damage to properties, lives and engineering projects in all mountainous areas in the world. In order to estimate the role of the landslides in erosion processes and evaluation of their risks, it is necessary to quantify landslides. This quantifying ...
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Landslides are the major natural hazard, causing significant damage to properties, lives and engineering projects in all mountainous areas in the world. In order to estimate the role of the landslides in erosion processes and evaluation of their risks, it is necessary to quantify landslides. This quantifying can be performed by applying the probability distributions that show the landslide size against the probability density. This study was investigated the behavior of landslide areas and volumes on Frequency distributions in Mazandaran province. Also total number, area and volume of landslides that have occurred over time were estimated using the approach suggested by Malamud et al. Result of cumulative frequency distribution of landslide area and volume revealed the significant proportion of large landslides in determining the total landslide area and volume. According to Malamud et al. approach total number of landslides were estimated to be 9823±2323. These landslides have been obliterated over the time by soil erosion, vegetation growth or by human activities and total of their affected area and volume by these landslides were 31.5±7.1 km2 and 0.232±0.052 km3, respectively. The obtained results also presented an area of 2×10-3 km2 as a critical threshold area for transition between resistances against slope failure.
