نتایج جستجو برای: after investigating gpr depth sections

تعداد نتایج: 1960269  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی 1392

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

Journal: :فیزیک زمین و فضا 0
ابوالقاسم کامکار روحانی دانشیار، دانشکده معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران اسماعیل اسحقی دانش آموخته ژئوفیزیک، دانشکده معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران علیرضا عرب امیری استادیار، دانشکده معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران

ground penetrating radar (gpr) method as a high resolution non-destructive geophysical method is used for detection of shallow subsurface targets. this method is based on the transmission of electromagnetic waves inside the earth and recording the reflected waves from the subsurface. as the method uses high-frequency electromagnetic waves in the frequency ranges of 12.5 to 2500 mhz (called gpr ...

2007
S. Colagrande M. Tallini D. Ranalli M. Scozzafava

Structural degradation of road pavements has a considerable impact on traffic safety. Roadway surface defects or discontinuities make driving uncomfortable and increase chances of accidents. GPR is an effective and non-destructive technique to discover and trace the causes of road pavement damages so characterizing road integrity. The paper shows the findings of a GPR survey carried out on degr...

Journal: :فیزیک زمین و فضا 0
سعید پرنو دانشجوی کارشناسی، گروه ژئوفیزیک، دانشکدۀ مهندسی معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، شاهرود، ایران ابوالقاسم کامکار روحانی دانشیار بخش مهندس معدن، دانشگاه شاهرود علی رضا عرب امیری استادیار بخش مهندسی معدن، دانشگاه شاهرود نعمت اله کریمی دکتری هواشناسی ماهواره، موسسه تحقیقات آب- پژوهشکده منابع آب تهران

determination of the thickness of a mountains glacier like alamkooh is very difficult due to its extremely cold climate conditions and high elevation, risk of falling large snow segments or balls and coarse topography of the glacier. in this research, due to the transparency of ice for electromagnetic (em) waves, and also, that ground penetrating radar (gpr) method is non-destructive, fast and ...

2015
L. Sold M. Huss A. Eichler M. Schwikowski M. Hoelzle

The spatial representation of accumulation measurements is a major limitation for current glacier mass balance monitoring approaches. Here, we present a method for estimating annual accumulation rates on a temperate Alpine glacier based on the interpretation of internal reflection horizons (IRHs) in helicopter-borne ground-penetrating radar (GPR) data. For each individual GPR measurement, the s...

Journal: :فیزیک زمین و فضا 0
ساناز اسمعیلی دانشجوی کارشناسی ارشد ژئوفیزیک، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران محمدکاظم حفیظی دانشیار، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران سیدسجاد جزائری جونقانی دانش آموخته ژئوفیزیک، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران

ground penetrating radar (gpr) is one of high resolution geophysical methods for locating missed objects, buried equipments. gpr is a nondestructive testing method that is useful in various kinds of explorations such as mapping the archaeological sites. the safety of the archaeological sites is one of the most concerns of the archaeologists. one of the best gpr applications is in archaeology as...

Journal: :Geo-spatial Information Science 2023

The failures of culverts can result in water and soil loss the surrounding subsurface, leading to collapses. In densely constructed urban areas, buried are inaccessible invisible, making Ground Penetrating Radar (GPR) inspection a widely adopted nondestructive efficient method. Previous research has employed artificial intelligence automate GPR interpretation by identifying special radargram te...

Journal: :فیزیک زمین و فضا 0
بهرام جفرسته دانشجوی دکتری، گروه مهندسی معدن، دانشکده معدن، دانشگاه صنعتی اصفهان، ایران نادر فتحیان پور دانشیار، گروه مهندسی معدن، دانشکده معدن، دانشگاه صنعتی اصفهان، ایران سید حسن طباطبایی استادیار، گروه مهندسی معدن، دانشکده معدن، دانشگاه صنعتی اصفهان، ایران

ground penetration radar (gpr) as a nondestructive method for identifying underground objects has been successfully applied to different fields of science such as geotechnical investigations, oil and gas exploration, geology, pipe detection and archeology investigations. metallic and nonmetallic objects can be identified by this method.  the depth of penetration is dictated by the gpr antennas....

2017
Haruko M. Wainwright Anna K. Liljedahl Baptiste Dafflon Craig Ulrich John E. Peterson Alessio Gusmeroli Susan S. Hubbard

This paper compares and integrates different strategies to characterize the variability of end-of-winter snow depth and its relationship to topography in ice-wedge polygon tundra of Arctic Alaska. Snow depth was measured using in situ snow depth probes and estimated using groundpenetrating radar (GPR) surveys and the photogrammetric detection and ranging (phodar) technique with an unmanned aeri...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...

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