نتایج جستجو برای: geomorphic index

تعداد نتایج: 398158  

Journal: :Int. J. Applied Earth Observation and Geoinformation 2015
Jianping Chen Ke Li Kuo-Jen Chang Giulia Sofia Paolo Tarolli

Among the anthropogenic topographic signatures on Earth, open-pit mines are of great importance. Mining is of interest to geomorphologists and environmental researchers because of its implication in geomorphic hazards and processes. In addition, open-pit mines and quarries are considered the most dangerous industrial sector, with injuries and accidents occurring in numerous countries. Their fas...

2003
DAVID R. MONTGOMERY BRIAN D. COLLINS JOHN M. BUFFINGTON

—Wood has been falling into rivers for millions of years, resulting in both local effects on channel processes and integrated influences on channel form and dynamics over a wide range of spatial and temporal scales. Effects of stable pieces of wood on local channel hydraulics and sediment transport can influence rates of bank erosion, create pools, or initiate sediment deposition and bar format...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2012
R J Wasson

River and catchment management usually proceeds from the identification of an undesirable state (e.g. pollution, sedimentation, excessive water extraction, dams, invasion by exotic species) to a strategy for reaching a desirable state described as a target. Desirable states are usually determined from community values, economic assessments and ecosystem functions, or a combination of these. Whe...

Journal: :natural environment change 0
ezatollah ghanavati associate professor, kharazmi university, tehran, iran mojtaba yamani professor, university of tehran, tehran, iran hadi karimi ph.d. candidate in physical geography, kharazmi university, tehran, iran

tectonic processes are major factors controlling landform development in tectonically active areas. in order to evaluate quantitative measurement of tectonic activities in the alamarvdasht basin in the south of iran, six different morphological indices including stream-gradient index (sl), drainage basin asymmetry (af), hypsometric integral (hi), valley floor width-valley height ratio (vf), dra...

ژورنال: علوم آب و خاک 2003
مصطفی کریمیان اقبال, , حسین خادمی, , محمدهادی فرپور, ,

Gypsiferous Aridisols are of great importance and extent in arid and semi-arid environments. There is a close relationship between soil genesis and landscape positions. This study aimed to determine the genesis and classification of gypsiferous soils and to investigate the relationship between micro-and macro-morphology of gypsum crystals and geomorphic positions in Rafsanjan area. The study ar...

2012
Paola Passalacqua Patrick Belmont Efi Foufoula-Georgiou

[1] High-resolution topographic data derived from light detection and ranging (lidar) technology enables detailed geomorphic observations to be made on spatially extensive areas in a way that was previously not possible. Availability of this data provides new opportunities to study the spatial organization of landscapes and channel network features, increase the accuracy of environmental transp...

2005
Sonja N. Oswalt Sammy L. King

We evaluated the severe degradation of floodplain habitats resulting from channelization and concomitant excessive coarse sedimentation on the Middle Fork Forked Deer River in west Tennessee from 2000 to 2003. Land use practices have resulted in excessive sediment in the tributaries and river system eventually resulting in sand deposition on the floodplain, increased overbank flooding, a rise i...

Journal: :Annals of The Tohoku Geographycal Asocciation 1964

Journal: :Annals of The Tohoku Geographycal Asocciation 1978

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