علوم غیرزیستی دریا
Mohammadali Roshani; Mehdi Mumipour; Hakimeh Amanipour
Abstract
Landslides are a kind of mass movement that has significant human, financial and environmental damage. Due to the destructive effects of this phenomenon on socio-economic and natural systems, it is essential to identify areas prone to mass movement and landslides throughout the country for use in land ...
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Landslides are a kind of mass movement that has significant human, financial and environmental damage. Due to the destructive effects of this phenomenon on socio-economic and natural systems, it is essential to identify areas prone to mass movement and landslides throughout the country for use in land use planning. Sadat Hosseini region is sensitive to landslides due to its lithological, climatic and land use location, young roughness with high altitude differences and steep slopes. human activities Therefore, further studies in the region seem necessary. Three models have been used for landslide sensitivity zoning in the study area including Anbalagan, Haeri-Samiei method and AHP. In this study, lithology criteria, slope, type of land use and vegetation, slope direction, river length and seismic path and altitude classes have been used to identify landslide sensitivity. Effective factor maps were prepared in GIS environment and using GIS tools and statistical analysis, landslide sensitivity zoning map was obtained. The results of the output of the models showed that in landslide sensitivity zoning using the Anbalagan model, 0.01, 33.26, 48.20, 25.35, 90.17% of the area in the sensitivity classes are very low, respectively. , Low, medium, high, very high. Adaptation of landslide sensitivity zoning maps in the study area based on the three models as well as the current status of landslides shows that most landslides are seen in young alluviums consisting of barracks and young alluvial fans. Also, the results of the Anbalagan model in the region are more in line with the existing reality.
علوم زیستی دریا
m m
Abstract
Nowadays, because of bad urban, agriculture and industrial management many of water resources suffer quality issues. Remote Sensing play a key role in water quality assessment and management. Many of pollutions can be observed using remote sensing images, so it can be a very useful tool for water resources ...
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Nowadays, because of bad urban, agriculture and industrial management many of water resources suffer quality issues. Remote Sensing play a key role in water quality assessment and management. Many of pollutions can be observed using remote sensing images, so it can be a very useful tool for water resources management. Because of wide spreading of water bodies, field work cause to increase in time and cost of studies, so using satellite images can be an alternative. Quality monitoring such as salinity, water color, suspended sediment may measured using satellite images. For assessing Water Quality, some empirical relations should be found to relate water quality to one or some spectral bands. Water Quality parameters such as color, chlorophyll, Suspended Sediment and Salinity may be assessed using Remote Sensing techniques. Remote Sensing can be used for assessment and monitoring algal concentration in lakes and water resources. Increase in chlorophyll cause to reduction in Blue band reflectance and increase in Green band reflectance. For assessing Water Quality, some empirical relations should be found to relate water quality to one or some spectral bands. In this study, Chl-a, concentration of Tripton and Turbidity of a small part of the Persian Gulf was estimated applying a bio-optical model.