Seyed Majid Reza Hosseini Mofrad; Hassan Ahmadi; Ali Akbar Mehrabi; Baharak Motamedvaziri
Abstract
For this purpose, according to Cochran's equation, from Hashtgerd-Taleghan asphalt road 26 km long and Hashtgerd-Taleghan dirt road 9 km long, road sedimentation was calculated with 17 and 11 samples, respectively, and finally, using statistical relationships, the erosion rate was calculated. And sedimentation ...
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For this purpose, according to Cochran's equation, from Hashtgerd-Taleghan asphalt road 26 km long and Hashtgerd-Taleghan dirt road 9 km long, road sedimentation was calculated with 17 and 11 samples, respectively, and finally, using statistical relationships, the erosion rate was calculated. And sedimentation was estimated in the entire route. By direct measurement of erosion, the total sediments remaining along the route were equal to 17259.32 tons per year, of which 6241.45 tons per year are related to the excavation wall and 11017.87 tons per year are related to the embankment wall. Using the WARSEM model, the total amount of sedimentation from asphalt and dirt roads was estimated as 15172.67 tons per year, equivalent to 52.14 tons per hectare per year, of which 9464.53 tons per year, equivalent to 48.03 tons. Per hectare per year, the contribution of the excavation wall and the embankment wall of the asphalt road is 14.5708 tons per year, which is equivalent to 22.63 tons per hectare per year, the contribution of the excavation wall and the embankment wall of the dirt road. The sensitivity of the WARSEM model for the standardized parameters for the asphalt road showed that the slope and geological factors are important factors in the sedimentation of the embankment wall and the height factor of the embankment wall is a very important parameter in the sedimentation of the embankment wall. The sensitivity of the model on the dirt road according to this score of the parameters was very close to each other.
Saeide Heydari; Ali Akbar Mehrabi; Mohsen Mohseni Saravi; Sakine Saedi
Abstract
The concept of land use transition highlights that land use change is non-linear and is associated with other societal and biophysical system changes. Changes in human systems has resulted in changes in the natural system such as changes in land use. Land use change causes not only environmental factors ...
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The concept of land use transition highlights that land use change is non-linear and is associated with other societal and biophysical system changes. Changes in human systems has resulted in changes in the natural system such as changes in land use. Land use change causes not only environmental factors like geography and topography are important, but social factors examined such as population growth or decline as well as changes in land use is a mix of economic, social and physical problems. Human societies and their environment, such as feedback, change, uncertainty and adaptation of interaction is social and biophysical changes associated with land use change is non-linear. Changes in human systems with natural systems, such as changes in land use will change. Landuse change causes not only environmental factors like geography and topography should not be involved in social factors such as population growth or decline as well as changes in land use is a mix of economic, social and physical problems. Migration impacts on economic activity seriously and may be initiate land use changes. this study was conducted To analyze the effects of Taleghan dam construction on developments in a human population and land use change analysis in a natural system,In general it can be suggested that in the years before the Taleghan dam, the area's population has been decreasing And pasture lands in the lower level of the population is in decline, but after the dam construction the lands become values in the area and seasonal population increases.
Sare Rasekhi; Mahdi Ghorbani; Aliakbar Mehrabi; Seyed Akbar Javadi
Abstract
Cooperation in pastoralism and indigenous knowledge of dairy management had been considered for many years in Iran and had been adapted with culture and environment of every region. This research had illustrated the analysis of indigenous knowledge and social cohesion in dairy management of grazing livestock ...
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Cooperation in pastoralism and indigenous knowledge of dairy management had been considered for many years in Iran and had been adapted with culture and environment of every region. This research had illustrated the analysis of indigenous knowledge and social cohesion in dairy management of grazing livestock in Ghasr e Yaghub village. Research method was a combination of filed studies, direct observation, and cooperative observation and organized interview. The results include functions of cooperative management system of “Ham Shiry” among rural women named “Shir Dan”, different dimensions of indigenous knowledge, mechanism of dairy management among women and related traditions and local cooperation. The results demonstrated that rural women in the study area had been created social institution based on local rules and in order to manage dairy products. This kind of associations had been rooted in indigenous knowledge and has a significant role to save and improve social cohesion and sustainability of economical characteristics of local inhabitants.
Ali Akbar Mehrabi; Mohammad Mohammadi; Mohsen Mohseni Saravi; Mohammad Jafari; Mehdi Ghorbani
Abstract
Providing of landing use maps and detecting of land capacity are required to manage of natural resources and environment and planning of land use. On the other hand, it is necessary to detect of the human deriving forces affecting land use change. In this research, we selected Seyed mohaleh and Drasara ...
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Providing of landing use maps and detecting of land capacity are required to manage of natural resources and environment and planning of land use. On the other hand, it is necessary to detect of the human deriving forces affecting land use change. In this research, we selected Seyed mohaleh and Drasara villages in Tonekabon city. First, were provided the land use maps in 1987 and 2008 by using TM and IRS Satellite images. Second, were investigated the human deriving forces affecting land use change through survey methods. According to results of this research can state that had been destroyed much percents of forests and added residential and agricultural lands in two villages. The most important of land use changes in two villages related to the economic problems (low income) and the economic loss of agricultural activities. Recently, the most important deterrent forces of land use changes are the property market downturn and land price that can prevent of severe changes in land use through the implementation of efficient land use law and supporting of farmers and gardeners in this region. Moreover, the most important indicators in the intensification of land use changes are being a tourist area, increasing of land price and unemployment.
Iman Islami; Ali Akbar Mehrabi; Gholam Reza Zehtabian; Mehdi Ghorbani
Abstract
Agriculture sector is the main consumer of water in the world. In productive sectors likeagriculture, water is considered as a valuable mediatory commodity or production input.Demand for agriculture water comes from consumers› (agriculture products›) behavior. Thisstudy aims to evaluate ...
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Agriculture sector is the main consumer of water in the world. In productive sectors likeagriculture, water is considered as a valuable mediatory commodity or production input.Demand for agriculture water comes from consumers› (agriculture products›) behavior. Thisstudy aims to evaluate water use optimality in Pomegranate Arbors at the Charkhab village inthe Yazd province. The data was randomly collected from 95 people of 153 beneficiaries inthe study area. This study surveys water demand variations in the case of one percent changein water procurement expenses in Yazd. Elasticity estimation revealed that pomegranateproducers› sensitivity to agriculture water price changes is high. To be specific, one percentincrease in the price of agriculture water would decrease water demand by 24.32 percentamongst pomegranate producers in Yazd. Production elasticity of water input was obtained0.0565 which is located in the third part of production region and means over-consumption ofwater by producers due to its low price. Given high demand for water in this arid area havingappropriate polices in water pricing for optimal water consumption is needed.
