Why the Sacramento Delta area differs from other parts of the great valley: Numerical modeling of thermal structure and thermal subsidence of forearc basins

2007 ◽  
Vol 43 (1) ◽  
pp. 75-90 ◽  
Author(s):  
V. O. Mikhailov ◽  
T. Parsons ◽  
R. W. Simpson ◽  
E. P. Timoshkina ◽  
C. Williams
Keyword(s):  
Numerical Modeling ◽  
Thermal Structure ◽  
Delta Area ◽  
Forearc Basins ◽  
Great Valley ◽  
Sacramento Delta ◽  
Thermal Subsidence

New rhynchonellid brachiopod genus from Tithonian (Upper Jurassic) cold seep deposits of California and its paleoenvironmental setting

1994 ◽  
Vol 68 (6) ◽  
pp. 1243-1252 ◽  
Author(s):  
Michael R. Sandy ◽  
Kathleen A. Campbell
Keyword(s):  
Upper Jurassic ◽  
Cold Seep ◽  
Late Mesozoic ◽  
Northeast Pacific ◽  
Sacramento Valley ◽  
Tectonically Active ◽  
Great Valley Group ◽  
Forearc Basins ◽  
Great Valley ◽  
The Town

A new brachiopod genus Cooperrhynchia is described for the species originally designated “Rhynchonella” schucherti Stanton, 1895, from the so-called Knoxville beds of northern California. A lectotype is selected for Cooperrhynchia schucherti (Stanton). An isolated carbonate lens within deep-water turbidites of the Great Valley Group (Jurassic–Cretaceous) yielded the brachiopod fossils near the town of Paskenta, western Sacramento Valley. The associated bivalve fauna indicates a mid late Tithonian age for the locality. Mollusks and the rhynchonellids Cooperrhynchia and Peregrinella are known from several scattered limestone lenses within Great Valley strata; collectively, these faunas and carbonate patches represent cold seep-associations that developed in forearc basins along the tectonically active northeast Pacific convergent margin during the late Mesozoic.

Investigation of Morphosedimentary Processes on a Schematic Louisiana Barrier Island Using Process-Based Numerical Modeling

2007 ◽  
Author(s):  
T. Campbell ◽  
B. de Sonneville ◽  
L. Benedet ◽  
D. J. W. Walstra ◽  
C. W. Finkl
Keyword(s):  
Numerical Modeling ◽  
Barrier Island

SIMULATION OF ELECTRICAL MONITORING OF DAMS WITH LEAKAGE WITH A TRANSVERSE PLACEMENT OF THE MEASURING INSTALLATION

2020 ◽  
Vol 8 (4) ◽  
pp. 69-82
Author(s):  
D.S. Rakisheva ◽  
◽  
B.G. Mukanova ◽  
I.N. Modin ◽  
◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Water Level ◽  
Electrical Resistivity Tomography ◽  
Resistivity Tomography ◽  
Measuring Installation ◽  
Basic Functions ◽  
Tomography Method ◽  
Dam Monitoring ◽  
The Mathematical Model ◽  
Measurement Line

Numerical modeling of the problem of dam monitoring by the Electrical Resistivity Tomography method is carried out. The mathematical model is based on integral equations with a partial Fourier transform with respect to one spatial variable. It is assumed that the measurement line is located across the dam longitude. To approximate the shape of the dam surface, the Radial Basic Functions method is applied. The influence of locations of the water-dam, dam-basement, basement-leakage boundaries with respect to the sounding installation, which is partially placed under the headwater, is studied. Numerical modeling is carried out for the following varied parameters: 1) water level at the headwater; 2) the height of the leak; 3) the depth of the leak; 4) position of the supply electrode; 5) water level and leaks positions are changing simultaneously. Modeling results are presented in the form of apparent resistivity curves, as it is customary in geophysical practice.

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