نتایج جستجو برای: ecological criteria of slope

تعداد نتایج: 21185841  

One of the types of water erosion and land degradation which causes imbalance in the area of natural resources and agricultural land and gives heavy losses, is the gully erosion phenomenon. To control this phenomenon, It is important to understand the influence factors on the geometry specification. Land degradation, a broken ecological balance of the land and landscape and risk of falling at b...

Journal: :ecopersia 2011
ghasem ali dianati tilaki hossein naderi nasrabad jalal abdollahi

the relationship between topography, soil factors, and distribution of ecological vegetation groups in the nodoushan arid rangelands of yazd province (iran) was investigated. the present species were recorded in each vegetation group using a randomized-systematic sampling method. plant cover and density were estimated quantitatively using the transect and quadrate methods, and the two-way indic...

Journal: :مرتع و آبخیزداری 0
قاسمعلی دیانتی تیلکی دانشیار گروه مرتع داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس علی محمدشریفی دانشجوی کارشناسی ارشد مرتع داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس سید جلیل علوی استادیار گروه جنگل داری، دانشکدة منابع طبیعی دانشگاه تربیت مدرس

the present study was conducted in the rangeland of glandrood watershed in the province of mazandaran. the objective of this study was to compare between the ecological amplitude of festuca ovina l., and poa bulbosa l., using the function hof along the gradient of the environmental variables. for this purpose 150 plots of 1m2 were established along the altitude gradient. the sampling method was...

Introduction Land-use planning has three subcategories: allocation, politics and economics. In general, allocation is the interaction between land proportion (supply) and the area required (demand), in current condition of the region. On the other hand, politics is the spatial planning. The economic aspect of land use is dedicated to the fact that in the system of supply and demand in order ...

اسدی نلیوان, امید, رستمی خلج, محمد, سور, انور, محسنی ساروی, محسن,

Today, as the focus of watershed planning and management for sustainable development in many of the issues. Ecological watersheds can be evaluated and ranked them according to various ecological criteria for the watershed, one of the important steps in the planning and management of watersheds. Since the cost of watershed management projects and heavy construction project budget is limited, it ...

Presently, significant growth of ecotourism is due to its special place in scientific and economic communities as well as the positive impact on environmental attitudes, sustainable development and revenue. The aims of this study are to develop a method based on field studies and questionnaire, to evaluate the ecotourism development potential in Abbas Abad wildlife refuge. According to field su...

2013
Guangyue Wang Jianpeng Zhang Tianyu Xu

Geocell protective slope is a kind of important ecological protection form, which is widely used in the geotechnical engineering field. Based on the finite element software ABAQUS, and combining with protective slope body’s mechanics performance in shallow soil, the finite element model of geocell slope protection is established under the conditions of rainfall seepage, and then we simulate the...

ژورنال: علوم آب و خاک 2016
جهانبخشی, فرشید, زاهدی, احسان, طالبی, علی,

In this research, to locate and prioritize suitable areas for flood spreading in Mashhad plain, 10 criteria were used including land use, slope, alluvium thickness, distance to well, distance to subterranean, distance from the village, water table drawdown, permeability coefficient, electrical conductivity, and drainage density. Weighting process was done by Analytic Network Process (ANP) and f...

اسدی نلیوان, امید, زاهدی امیری, قوام الدین, محسنی ساروی, محسن, نظری سامانی, علی اکبر,

Sustainable development is a comprehensive approach to improve Human life quality to meet economical, social and environmental needs of anthropological residents. When sustainable development is achieved an overlapping is created between ecological, economical and social classes. The most principle goal for this research is to determine sustainability criteria and indices and to measure sustain...

Esmaeel Salehi Shima Homaee,

The purpose behind this research, which is done on the Abshooran river in Kermanshah and in the area between Delgosha bridge and wooden bridge is to develop lively and active urban centers and to elevate the quality functions of the region and the ecological conditions of the river’s border. To reach for this goal, ecological and aesthetic criteria were in use in a way that proposed alternative...

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