scholarly journals THE EVALUATION OF EFFECTS OF SPATIAL VARIABILITY OF SOIL PROPERTIES, SURFACE TOPOGRAPHY AND SPATIAL COHERENCY OF INCIDENT WAVE ON GROUND MOTION AMPLIFICATION : The Case of KUSHIRO J. M. A. Site

1995 ◽  
Vol 60 (476) ◽  
pp. 85-94 ◽  
Author(s):  
Katsuhisa KANDA ◽  
Masato MOTOSAKA
Keyword(s):  
Spatial Variability ◽  
Soil Properties ◽  
Surface Topography ◽  
Ground Motion ◽  
Incident Wave ◽  
Ground Motion Amplification ◽  
A Site ◽  
Spatial Coherency

EFFECTS OF SPATIAL VARIABILITY OF SOIL PROPERTIES ON SURFACE GROUND MOTION

2003 ◽  
Vol 7 (sup001) ◽  
pp. 1-44 ◽  
Author(s):  
DOMINIC ASSIMAKI∗ ◽  
ALAIN PECKER ◽  
RADU POPESCU ◽  
JEAN PREVOST†
Keyword(s):  
Spatial Variability ◽  
Soil Properties ◽  
Ground Motion

Repeatability of microseism measurements in Port Hueneme case study

1996 ◽  
Vol 86 (2) ◽  
pp. 428-435
Author(s):  
John M. Ferritto
Keyword(s):  
Ground Motion ◽  
Reference Site ◽  
Reference Sites ◽  
Ground Motion Amplification ◽  
Array Measurements ◽  
Contour Plots ◽  
Soil Site ◽  
A Site

Abstract Microseism measurements can assist in prediction of ground-motion amplification and microzonation. A series of array measurements were conducted in the Port Hueneme, California, area. The measurements were repeated, and the error of microseism measurements is discussed. From the seven individual trials, it was possible to show the convergence of microseism measurements and their repeatability. The series of array measurements of microseisms used both a soil and a rock reference site. The soil site was a site having a well-defined boring log. A comparison is made between results obtained using a rock and a soil reference site. It was found that qualitatively the general dimensionless shape of relative amplification contour plots was similar using both reference sites. Both reference sites showed the same regions as having higher amplification compared with other lower regions.

scholarly journals Influence of 2D heterogeneous elastic soil properties on surface ground motion spatial variability

2019 ◽  
Vol 123 ◽  
pp. 75-90 ◽  
Author(s):  
E. El Haber ◽  
C. Cornou ◽  
D. Jongmans ◽  
D. Youssef Abdelmassih ◽  
F. Lopez-Caballero ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Soil Properties ◽  
Ground Motion ◽  
Elastic Soil

Applying the Method of Lagrange Multipliers to Derive an Estimator for Unsampled Soil Properties

2014 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Set Foong Ng ◽  
Pei Eng Ch’ng ◽  
Yee Ming Chew ◽  
Kok Shien Ng
Keyword(s):  
Soil Properties ◽  
Lagrange Multipliers ◽  
Unbiased Estimator ◽  
Soil Property ◽  
Minimum Variance ◽  
Distance Method ◽  
True Value ◽  
A Site ◽  
Method Of Lagrange Multipliers ◽  
Inverse Distance

Soil properties are very crucial for civil engineers to differentiate one type of soil from another and to predict its mechanical behavior. However, it is not practical to measure soil properties at all the locations at a site. In this paper, an estimator is derived to estimate the unknown values for soil properties from locations where soil samples were not collected. The estimator is obtained by combining the concept of the ‘Inverse Distance Method’ into the technique of ‘Kriging’. The method of Lagrange Multipliers is applied in this paper. It is shown that the estimator derived in this paper is an unbiased estimator. The partiality of the estimator with respect to the true value is zero. Hence, the estimated value will be equal to the true value of the soil property. It is also shown that the variance between the estimator and the soil property is minimised. Hence, the distribution of this unbiased estimator with minimum variance spreads the least from the true value. With this characteristic of minimum variance unbiased estimator, a high accuracy estimation of soil property could be obtained.

Effect of Slope Mesorelief on the Spatial Variability of Soil Properties and Vegetation Index Based on Remote Sensing Data

2019 ◽  
Vol 55 (9) ◽  
pp. 1329-1337
Author(s):  
N. V. Gopp ◽  
T. V. Nechaeva ◽  
O. A. Savenkov ◽  
N. V. Smirnova ◽  
V. V. Smirnov
Keyword(s):  
Remote Sensing ◽  
Spatial Variability ◽  
Soil Properties ◽  
Vegetation Index ◽  
Remote Sensing Data ◽  
Sensing Data

Spatial Variability of Rainfed Wheat Production Under the Influence of Topography and Soil Properties in Loess-Derived Soils, Northern Iran

2020 ◽  
Vol 14 (4) ◽  
pp. 597-608
Author(s):  
Mohammad Ajami ◽  
Ahmad Heidari ◽  
Farhad Khormali ◽  
Mojtaba Zeraatpisheh ◽  
Manouchehr Gorji ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Soil Properties ◽  
Northern Iran ◽  
Wheat Production ◽  
Rainfed Wheat

Nonlinear ground-motion amplification by sediments during the 1994 Northridge earthquake

Nature ◽  
10.1038/37586 ◽  
1997 ◽  
Vol 390 (6660) ◽  
pp. 599-602 ◽  
Author(s):  
Edward H. Field ◽  
Paul A. Johnson ◽  
Igor A. Beresnev ◽  
Yuehua Zeng
Keyword(s):  
Ground Motion ◽  
Northridge Earthquake ◽  
Ground Motion Amplification ◽  
1994 Northridge Earthquake
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