نتایج جستجو برای: erodibility

تعداد نتایج: 620  

Journal: :global journal of environmental science and management 0
s. afshar department of civil engineering, science and research branch, islamic azad university, tehran, iran b. saghafian department of civil engineering, science and research branch, islamic azad university, tehran, iran h.r. vosoughifar department of civil engineering, islamic azad university, tehran south branch, tehran, iran

the present study was carried out to determine the possible origins of sediments entering taleghan dam in northern part of iran, in order to avoid further sedimentation and helping in extension of the useful life of the proposed dam. this was performed by xrd analysis. to do so, first of all, sediment sampling points were positioned along the taleghan river. the collected samples, after coding,...

2007
Alexandre Marco da Silva Lilian Casatti Clayton Alcarde Alvares Aline Maria Leite Luiz Antonio Martinelli Steven F. Durrant

Soil loss expectation and possible relationships among soil erosion, riparian vegetation and water quality were studied in the São José dos Dourados River basin, State of São Paulo, Brazil. Through Geographic Information System (GIS) resources and technology, Soil Loss Expectation (SLE) data obtained using the Universal Soil Loss Equation (USLE) model were analyzed. For the whole catchment area...

Journal: :Journal Of Geophysical Research: Earth Surface 2022

Bedrock erodibility exerts a fundamental control on fluvial incision, and therefore the evolution of entire landscapes. However, roles relative significance specific bedrock properties like rock strength discontinuity spacing in setting remain poorly understood. As result, is often overlooked or oversimplified numerical field-based investigations landscape processes, leading to misinterpretatio...

Journal: :Catena 2022

Understanding erosion and sedimentation processes along the drainage network, from hillslopes to rivers reservoirs, is essential for water resources management river restoration. This work proposes a novel dynamic evaluation of landscape factor modeled runoff rates physically-based distributed hydrological modelling, estimate event-scale sediment connectivity. Four precipitation events moderate...

Journal: Desert 2016
A. Salehpour Jam, M. Karimpour Reihan

Investigation of desertification trend requires an understanding of phenomena that create changes singly or action and reaction together in an area that these changes were led to the desertification and land degradation. In the investigation of pedological criterion affecting on land degradation in Alluvial Fans, first, the map of units was created by overlaying and crossing maps of slope class...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1370

حوضه آبخیز سدمخزنی شهید پارسا در جنوب شرقی شهرستان فردوس استان خراسان واق گردیده است . بااحداث این سد علاوه برآبیاری اراضی موجود، 700 هکتار از اراضی جدید پایین دست به زیر کشت می روند. عمده ترین معضل موجود در رابطه با حوضه آبخیز، وجود بار رسوب فراوان و تجمع آن در پشت مخزن سد می باشد. لذابه علت عدم وجود اطلاعات کافی از وضعیت فرسایش خاک در حوضه آبخیز، دراین رساله بررسی و مطالعه فرسایش پذیری خاک ان...

Journal: :International Journal of Environmental Research and Public Health 2018

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