Perforated Stones in River Beds
نویسندگان
چکیده
منابع مشابه
Analysis of Gravel River Beds using Three-Dimensional Laser Scanning
The size and shape of the stones in dry gravel river beds are of interest in geology and river hydraulics. The topography of a bed surface can be measured by three-dimensional laser scanning. A method is described for fitting ellipsoids to the surfaces of individual stones to estimate their size, shape and orientation in the river bed. Different cost functions are evaluated and the methods are ...
متن کاملA Review on the Detection of Heavy Metals in Water Bodies, Fish Organs, Sediment River Beds
The consumption of highly contaminated water and eatables may prove lethal to the human being and may bring genetic disorders. Toxic heavy metals are continuously released to the aquatic bodies in Allahabad as a rapid industrialization. Metals are the problem of magnitude and of ecological significance due to their high toxicity and ability to accumulate in living organisms. Many toxicologists ...
متن کاملFlow through Packed Beds and Fluidized Beds
Chemical engineering operations commonly involve the use of packed and fluidized beds. These are devices in which a large surface area for contact between a liquid and a gas (absorption, distillation) or a solid and a gas or liquid (adsorption, catalysis) is obtained for achieving rapid mass and heat transfer, and particularly in the case of fluidized beds, catalytic chemical reactions. You wil...
متن کاملDecay factors and patterns of stones in open-air historical sites built of carbonate sedimentary stones
The number of historical open-air sites built of stone are relatively limited in comparison to the other historical artificial in Iran, but these sites include great significance in terms of value, historic and their knowledge of past. Since these stone poen-air sites are generally about two thousand years old, they have been exposed to decay factors for a long time. Many information and data o...
متن کاملReconstruction of 2D river beds by appropriate interpolation of 1D cross-sectional information for flood simulation
The 2D numerical simulation of river flow requires a large amount of topographic data to build an accurate Digital Terrain Model which must cover the main river channel and the area likely to be flooded. DTMs for large floodplains are often generated by LiDAR flights. However, it is often impossible to obtain LiDAR data of permanently inundated river beds. These areas are often surveyed and dis...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1880
ISSN: 0028-0836,1476-4687
DOI: 10.1038/021348c0