Climatology
Mohamad Reza Aphsharei Azad; Halea Pouraky
Volume 19, Issue 53 , September 2015, , Pages 1-24
Abstract
Rivers across the nation in terms of conservation, utilization and development of as well as quantitative and qualitative evaluation of favorable river conditions for fish to be used. This study is analysis of factors that is necessary to apply physiographic models of river which have role on topology ...
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Rivers across the nation in terms of conservation, utilization and development of as well as quantitative and qualitative evaluation of favorable river conditions for fish to be used. This study is analysis of factors that is necessary to apply physiographic models of river which have role on topology of stations of fish culture(salmon), in addition to factors which have been used currently in this field, Sham rood river has been studied in terms of physiography. Results of survey among various factors are indicating importance of physiography of studied location that is usable for constructing workshops of fish culture; Sham rood river is regarding to biologic and frequency indices, its potential power to produce fish is 348 kg.hec. This production is high since Farvardin until Shahrivar and then Khordad has highest amount of fish production. Effective factors include physiographic patterns such as area and perimeter, form of basin, height, inclination, and direction of inclination. These results in analysis of future procedures show condition of topology of fish culture pools' construction and physical and mechanical elements of fish culture such as PH of water, velocity of water flow, light effect, degree of water turbid, suspension solids, solidity of water, electric conduction of water (EC), chemical materials, water salinity, rate of required water show biological factors. Finally, check the condition of steep mountainous watersheds for fish with cold water and put the channel maps, political spots, lithology, slope, aspect factors needed to put them together with the salmon farming appropriate the construction of stations and half fish and unfavorable conditions for fish and plant construction has been determined ..
Mohammadreza Afshariazad; Haleh Poraki
Volume 16, Issue 42 , March 2013, , Pages 23-44
Abstract
Road transport plays a key role in the effective implementation of national sustainable development plays and safety of traffic during the year. Of special importance are Col Almass Anklet and Esalam in the western Alborz 30 km long road. This way of connects sections steep and passes high-risk areas ...
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Road transport plays a key role in the effective implementation of national sustainable development plays and safety of traffic during the year. Of special importance are Col Almass Anklet and Esalam in the western Alborz 30 km long road. This way of connects sections steep and passes high-risk areas and always threatens types of risks, especially in the range of movement types. Established lines of communication and identification of natural risks and geomorphic effects of road accidents caused by geomorphologic factors is a main issue The relationship between climatic phenomena, road accidents and the high-risk areas is studied which can provide suggestions and solutions to improve road transport safety factors. In one of the axes, the axis connecting the north of the country Esalem-Khalkhal (Col Almass) are included in the study. Methods are based on field observations and interpretation of these observations, geological and topographic maps, aerial photographs. In addition, a risk zoning map of the area showed geomorphologic 64 percent of association is high and very high risk. Geomorphologic assessment conducted in this study, shows damage to roads and other facilities in the area.
