منابع مشابه
Ecologically-based Management Factors and criteria of River-Valleys in Tehran metropolis-Case Study: River-Valleys of Kan
Iran has seasonal rivers because of dry climate, low rainfall and different topography. These river- valleys have main role in forming, genesis, and sustainability of human settlements and provide different ecological services. The main services include beauty, store of green spaces, water supply, reduce and create temperature differences, local air flow and natural ventilation which are part o...
متن کاملThe Formation of Martian River Valleys by Impacts
We explore the role of large impacts in creating the Martian valley networks. Recent dating shows that some large impact basins are contemporaneous with the valley networks. The mass deposited (and volatiles released) by impacts is large, and comparable with the mass from the Tharsis volcanic construct. Steam atmospheres formed after large impacts can produce more than 600 m of rainfall, follow...
متن کاملPresenting a Geomorphological Conceptual Model of Construction of bridges in urban floodway- river valleys
Geomorphology is related to the shapes and processes of the earthchr('39')s surface, and any human activity, including planning, that changes the shape of the earth and can cause quantitative and qualitative changes in the movement and movement of materials and kinetic energy and affect the geomorphic system. The attention and involvement of geomorphologists are included. Geomorphology, as a s...
متن کاملtechnical and legal parameters for determination of river boundary,( case study haraz river)
چکیده با توسعه شهر نشینی و دخل و تصرف غیر مجاز در حریم رودخانه ها خسارات زیادی به رودخانه و محیط زیست اطراف آن وارده می شود. در حال حاضر بر اساس آئین نامه اصلاح شده بستر و حریم رودخانه ها، حریم کمی رودخانه که بلافاصله پس از بستر قرار می گیرد از 1 تا20 متر از منتهی الیه طرفین بستر رودخانه تعیین، که مقدار دقیق آن در هر بازه از رودخانه مشخص نیست. در کشورهای دیگر روشهای متفاوتی من جمله: درصد ریسک...
15 صفحه اولExplaining a Conceptual Model for Sustainable Regeneration of the River Valleys of the City of Tehran (Case study: Darakeh River Valley in Tehran)
The issues of loss of quality of life and functional disruption of the river valleys are very important. In the present settlement system, the river valleys should not be places for reproducing poverty. To link the environmental values with urban development, the research is to answer the following question: How can the results of the integrated development of urban valleys be achieved via urba...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1866
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800198401