Among the natural hazards, destructive earthquakes are the most common cause of casualties and financial losses and human deaths several times more in developing countries than developed countries. By increasing urban...Among the natural hazards, destructive earthquakes are the most common cause of casualties and financial losses and human deaths several times more in developing countries than developed countries. By increasing urbanization and construction process, construction activities and because Behbahan is a new city and is located near active faults, earthquake risk is increasing and will have disastrous results. Historical data also indicate destructive earthquakes in 1052 and 1085 with the magnitudes of 8.6 and 8.5 on the Richter scale which destroyed Arjan and killed many people. Due to frequent earthquakes in Behbahan as well as numerous small and large faults around it, the city has high seismic potential. So locating new developments and constructions should be more accurate.展开更多
To understand the natural environments of drylands, deserts, arid and semi-arid regions of the earth is to understand the processes and forms of their rivers. One of the river studies and fluvial processes are morphom...To understand the natural environments of drylands, deserts, arid and semi-arid regions of the earth is to understand the processes and forms of their rivers. One of the river studies and fluvial processes are morphometry analyses. The channel forms in an alluvial plain reflecting the movement of water and the particle size of the load flowing down the channel. The dynamics of channel change has led to conflict with human resource development. Three basic channel patterns are detected in the region. They are braided, meandering and straight. In this research for assessment of meandering Maroon River, we used DEM (Digital Elevation System), Topography maps, Arc GIS software, Google earth, field work and library studies and mathematic formula. The two general indices for analyzing meandering patterns are 1) sinuosity coefficient 2) central angle. In this paper, the authors were used these factors and improved them. One of the results is creation of direction index and the second result is the Maroon River which has a type of sinuosity in any reach.展开更多
文摘Among the natural hazards, destructive earthquakes are the most common cause of casualties and financial losses and human deaths several times more in developing countries than developed countries. By increasing urbanization and construction process, construction activities and because Behbahan is a new city and is located near active faults, earthquake risk is increasing and will have disastrous results. Historical data also indicate destructive earthquakes in 1052 and 1085 with the magnitudes of 8.6 and 8.5 on the Richter scale which destroyed Arjan and killed many people. Due to frequent earthquakes in Behbahan as well as numerous small and large faults around it, the city has high seismic potential. So locating new developments and constructions should be more accurate.
文摘To understand the natural environments of drylands, deserts, arid and semi-arid regions of the earth is to understand the processes and forms of their rivers. One of the river studies and fluvial processes are morphometry analyses. The channel forms in an alluvial plain reflecting the movement of water and the particle size of the load flowing down the channel. The dynamics of channel change has led to conflict with human resource development. Three basic channel patterns are detected in the region. They are braided, meandering and straight. In this research for assessment of meandering Maroon River, we used DEM (Digital Elevation System), Topography maps, Arc GIS software, Google earth, field work and library studies and mathematic formula. The two general indices for analyzing meandering patterns are 1) sinuosity coefficient 2) central angle. In this paper, the authors were used these factors and improved them. One of the results is creation of direction index and the second result is the Maroon River which has a type of sinuosity in any reach.
