A Study of the Moisture Content in Relation to Resistivity of Earth
Author : E. O. Seiler
Publisher :
Page : 47 pages
File Size : 49,47 MB
Release : 1929
Category :
ISBN :
Author : E. O. Seiler
Publisher :
Page : 47 pages
File Size : 49,47 MB
Release : 1929
Category :
ISBN :
Author : Xin Li
Publisher : Springer
Page : 0 pages
File Size : 15,22 MB
Release : 2019-03-07
Category : Science
ISBN : 9783662482964
This volume will discuss the state of the art of different observation and measurement techniques useful for ecohydrological studies. The techniques cover the entire spectrum of the water-soil-plant-atmosphere continuum. And the other volumes are "Water and Ecosystems", "Water-Limited Environments" and "Integrated Ecohydrological Modeling" etc.
Author : Andrew Binley
Publisher : Cambridge University Press
Page : 409 pages
File Size : 46,1 MB
Release : 2020-12-17
Category : Business & Economics
ISBN : 1108492746
A comprehensive text on resistivity and induced polarization covering theory and practice for the near-surface Earth supported by modelling software.
Author : Mohammad Naveed Hayat Chaudhry
Publisher :
Page : pages
File Size : 31,56 MB
Release : 1984
Category :
ISBN :
The effects. of moisture, cation concentration, dens ity , temper~ t ure and grai n si ze on the electrical resistivity of so il s are examined using laboratory prepared soils. An i nexpen si ve method for preparing soils of different compositions was developed by mixing various size fractions i n the laboratory. Moisture and cation c oncentration are related to soil resistivity by powe r functions, whereas soil resistiv ity and temperature, density, Yo gravel, sand , sil t, and clay are related by exponential functions . A total of 1066 cases (8528 data) from all the experiments were used in a step-wise multiple linear r egression to determine the effect of each variable on soil resistivity. Six variables out of the eight variables studied account for 92.57/. of the total variance in so il resistivity with a correlation coefficient of 0.96. The other two variables (silt and gravel) did not increase the · variance. Moisture content was found to be - the most important Yo clay. variable- affecting s oil res istivi ty followed by These two variables account for 90.81Yo of the total variance in soil resistivity with a correlation ~oefficient ·.of 0 . 95. Based on these results an equation to ' ~~ed{ ct soil r esist ivi ty using moisture and Yo clay is developed . To t est the predicted equation, resistivity measurements were made on natural soils both in s i tu a nd i n the laboratory. The data show that field and laboratory measurements are comparable. The predicted regression line c losely coinciqes with resistivity data from area A and area B soils ~clayey and silty~clayey sands). Resistivity data and the predicted regression line in the case of c layey soils (clays> 40%) do not coincide, especially a t l ess than 15% moisture. The regression equation overestimates the resistivity of so i l s from area C and underestimates for area D soils. Laboratory prepared high clay soils give similar trends. The deviations are probably caused by heterogeneous distribution of mo i sture and difference in the type o f cl ays present in these soils.
Author :
Publisher :
Page : 414 pages
File Size : 32,48 MB
Release : 1913
Category : Technology
ISBN :
Author : Richard C. Aster
Publisher : Elsevier
Page : 406 pages
File Size : 32,33 MB
Release : 2018-10-16
Category : Science
ISBN : 0128134232
Parameter Estimation and Inverse Problems, Third Edition, is structured around a course at New Mexico Tech and is designed to be accessible to typical graduate students in the physical sciences who do not have an extensive mathematical background. The book is complemented by a companion website that includes MATLAB codes that correspond to examples that are illustrated with simple, easy to follow problems that illuminate the details of particular numerical methods. Updates to the new edition include more discussions of Laplacian smoothing, an expansion of basis function exercises, the addition of stochastic descent, an improved presentation of Fourier methods and exercises, and more. Features examples that are illustrated with simple, easy to follow problems that illuminate the details of a particular numerical method Includes an online instructor’s guide that helps professors teach and customize exercises and select homework problems Covers updated information on adjoint methods that are presented in an accessible manner
Author : United States. National Bureau of Standards
Publisher :
Page : 832 pages
File Size : 44,8 MB
Release : 1963
Category : Ionospheric radio wave propagation
ISBN :
Author : United States. Bureau of Standards
Publisher :
Page : 510 pages
File Size : 44,16 MB
Release : 1913
Category :
ISBN :
Author : Vernon Trampe Loesing
Publisher :
Page : 84 pages
File Size : 40,71 MB
Release : 1948
Category :
ISBN :
Author : United States. National Bureau of Standards
Publisher :
Page : 914 pages
File Size : 42,70 MB
Release : 1960
Category : Ionospheric radio wave propagation
ISBN :