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 کاملOceanic Uptake of Anthropogenic CO<sub>2</sub>: TheMajor Uncertainties
The recent notes by Broecker [1991] and by Smith and Mackenzie [1991] rightfully point out that many oceanographers do not have a clear grasp of the relationship between the oceanic biological pump and anthropogenic CO2 transient. This misunderstanding has unfortunately led some scientists to make misleading claims as to the importance of the biological pump in the anthropogenic transient. It i...
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 کاملriver-valleys as an intra-city natural feature
intra-city natural structures have always had a key role in creating sustainable urban greenspaces. adapting to natural features and relating the intra-city greenspaces to such natural structures as river-valleys, hillsides, lakes and forests, guarantee the endurance, sustainability and longevity of the natural quality of city. this paper looks at intra-city natural structures which have underg...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1902
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800180173