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Comparison of soil water content estimation equations ...

To use this equations, knowledge of porosity (which can be obtained from measurement of bulk density) and dielectric permittivity of the solid phase is needed. Porosity is obtained from measured bulk density by: (13) ϕ f = 1-ρ b ρ s where the density of the solid phase (ρ s) was assumed to be equal to 2…

Vertical Velocity - Applied Radar Science

For parameterizing shallow cloudiness and subsequently estimate thermodynamic fluxes, the bulk mass-flux based approach is very appealing since it embeds a cloud ensemble into a one-dimensional plume and represents turbulent transport using air density, draft magnitude and its fractional areal coverage [Tiedtke, 1989]. Physically, mass flux needs to reach zero at cloud top.

(PDF) Use of Vertical‐Radar Profiling to Estimate Porosity ...

Use of Vertical‐Radar Profiling to Estimate Porosity at Two New England Sites and Comparison with Neutron Log Porosity Article (PDF Available) · January 2002 with 55 Reads How we measure 'reads'

Permeability - AAPG Wiki

Permeability is the capacity of a rock layer to transmit water or other fluids, such as oil. The standard unit for permeability is the Darcy (d) or, more commonly, the millidarcy (md). Relative permeability is a dimensionless ratio that reflects the capability of oil, water, or gas to move through a formation compared with that of a single-phase fluid, commonly water.

QUANTITATIVE PRECIPITATION ESTIMATION AND ERROR …

P13B.6 1 QUANTITATIVE PRECIPITATION ESTIMATION AND ERROR ANALYSIS WITH A UHF WIND PROFILING RADAR AND A TWO-DIMENSIONAL VIDEO DISDROMETER Laura M. Kanofsky1;⁄, Phillip B. Chilson1, Terry J. Schuur2, Guifu Zhang1, Qing Cao1, Edward A. Brandes3 1School of Meteorology, University of Oklahoma, Norman, Oklahoma, USA 2Cooperative Institute for Mesoscale …

Vertical Velocity | Radar Science

For parameterizing shallow cloudiness and subsequently estimate thermodynamic fluxes, the bulk mass-flux based approach is very appealing since it embeds a cloud ensemble into a one-dimensional plume and represents turbulent transport using air density, draft magnitude and its fractional areal coverage [Tiedtke, 1989].Physically, mass flux needs to reach zero at cloud top.

Retrieving Vertical Air Motion and Raindrop Size ...

The vertical evolution of falling raindrops is a result of evaporation, breakup, and coalescence acting upon those raindrops. Computing these processes using vertically pointing radar observations is a two-step process. First, the raindrop size distribution (DSD) and vertical air motion need to be estimated throughout the rain shaft. Then, the changes in DSD properties need to be quantified as ...

The Use of Millimeter Doppler Radar Echoes to Estimate ...

means of profiling airborne radar data collected in the central Great Plains during the International H 2 O Project, May–June 2002 (IHOP 2002). Clear-air echoes are sufficiently strong for the radar, a 95-GHz cloud radar, to detect most of the CBL at a resolution of 30 m. Vertical radar …

Vertical Air Motion Retrieved from Dual-Frequency Profiler ...

The 50-MHz profiler operating near Darwin, Northwest Territory, Australia, is sensitive to both turbulent clear-air (Bragg) and hydrometeor (Rayleigh) scattering processes. Below

Vertical profiling of tropical precipitation using passive ...

the vertical variability of the precipitation by appropriately transforming the radar-derived vertical radar precipitation-rate profiles, on one hand, and try to estimate the main modes of this variability from the simultaneously-measured brightness temperatures.

Attenuation modes from Vertical Seismic Profiling and ...

We utilized high‐quality vertical seismic profiling and sonic waveform data acquired in a carbonate reservoir located in Abu Dhabi, United Arab Emirates. The scattering profile of vertical‐seismic‐profiling data contributes significantly to wave attenuation that can be explained by high heterogeneity of the carbonate rocks.

Vertical Radar Profiling to Determine Dielectric Constant ...

VERTICAL RADAR PROFILING TO DETERMINE DIELECTRIC CONSTANT, WATER CONTENT AND POROSITY VALUES AT WELL LOCATIONS Michael D. Knoll and William P. Clement Center for Geophysical Investigation of the Shallow Subsurface Boise State University Boise, ID 83725 ABSTRACT A vertical radar profiling (VRP) experiment was conducted at the Boise Hydrogeophysical

VRP - Vertical Radar Profiles | AcronymAttic

Experimental control included (1) 1-D vertical velocity functions determined from traveltime inversion of vertical radar profiles (VRP) and (2) neutron porosity logs. Ground Penetrating Radar in Sediments; together with new advances such as vertical radar profiles and 3-D GPR imaging for hydrocarbon reservoir modeling...

Vertical radar profiling influence of survey geometry on ...

Use of vertical-radar profiling to estimate porosity at two New England sites and comparison to neutron log porosity. Proceedings, Symposium on the Application of Geophysics to Engineering and Environmental Problems, 10–14 February 2002, Las Vegas, Nevada.

A New Approximation of Water Saturation Estimation Based ...

It is applied to the real data using the vertical seismic profiling (VSP) data in Pasir Cantang well, West Java for some layers. The obtained values of water saturation have not been calibrated to ...

Traveltime Inversion of Vertical Radar Profiles

Using vertical radar profile data from an unconfined aquifer near Boise, Idaho, we inverted traveltimes to obtain velocity estimates at the well location. The velocity change at a depth of 2.0 m corresponds well with the measured depth to the water table of 1.95 m, and at depths between 2 and 18 m, the velocities ranged between 0.06 and 0.1 m/ns.

Click Here Full Article Estimating porosity with ground ...

(1) 1-D vertical velocity functions determined from traveltime inversion of vertical radar profiles (VRP) and (2) neutron porosity logs. We estimated the porosity distribution in the saturated zone using both the Topp and Complex Refractive Index Method (CRIM) equations and found the CRIM estimates in better agreement with the neutron logs. We

USE OF VERTICAL-RADAR PROFILING TO ESTIMATE POROSITY …

USE OF VERTICAL-RADAR PROFILING TO ESTIMATE POROSITY AT TWO NEW ENGLAND SITES AND COMPARISON WITH NEUTRON LOG POROSITY Marc L. Buursink, CGISS, Boise State University, Boise, ID John W. Lane Jr., OGW-BG, U.S. Geological Survey, Storrs, CT William P. Clement, CGISS, Boise State University, Boise, ID

"Traveltime Inversion of Vertical Radar Profiles" by ...

Using vertical radar profile data from an unconfined aquifer near Boise, Idaho, we inverted traveltimes to obtain velocity estimates at the well location. The velocity change at a depth of 2.0 m corresponds well with the measured depth to the water table of 1.95 m, and at depths between 2 and 18 m, the velocities ranged between 0.06 and 0.1 m/ns.

3-D GPR Imaging of Complex Fluvial Stratigraphy at the ...

time which may be converted to depth using velocities derived from common midpoint soundings and vertical radar profiling (Knoll and Clement, 1999). Two reflection profiles, an inline profile and a crossline profile, are shown in Figures 2 and 3, with data collected using 200, …

Detecting sand-dust storms using a wind-profiling radar

Sand-dust storm is a type of disastrous weather, typically occurring in arid and semi-arid climates. This study selected a region in the hinterlands of the Taklimakan Desert, called the Tazhong region, as the experimental area to quantitatively estimate the particle concentrations of sand-dust storms using the boundary layer wind-profiling radar.

Three-dimensional stochastic estimation of porosity ...

withheld. This is done for two cases where the withheld porosity log is located: (1) at a crosshole GPR profile, so the full available data set, with the exception only of the with-held porosity log, is used to condition the 3-D simulation; and (2) where no data are available so all the existing cross-

Convective Boundary Layer Depth Estimation from Wind ...

where T 0 is the system noise temperature, α 2 accounts for the losses in the transmission line, P t is the transmitted power, n c is the number of coherent integrations, A p is the physical antenna area, λ is the radar wavelength, R is the range to the target, and ΔR is the range resolution, and SNR is estimated from the spectral data.. An example of radar wind-profiling data that ...

Instantaneous vertical profiling of precipitation using ...

Nov 13, 2010· To that end, we conducted several studies to 1) establish that the main impediment to the vertical profiling is the unknown signature of the sea surface in the non-precipitating portions of the field of view, and 2) use surfaceinsensitive principal components of the brightness temperatures to retrieve the vertical principal components of the ...

3.6 DEVELOPMENT OF CLOUD PROFILING RADAR FOR …

purpose, vertical structure of clouds and aerosols are important as well as horizontal distributions of clouds on global (Figure 1). Two active sensors, cloud profiling radar (CPR) and lidar (ATLID) are planed to be installed as well as optical imager (MSI) and broad band radiometer (BBR). CPR has much sensitivity to cloud particles than

Vertical profiling of tropical precipitation using passive ...

the radar‐derived vertical radar precipitation rate profiles, on one hand, and try to estimate the main modes of this vari-ability from the simultaneously measured brightness tem-peratures. In our implementation, over a given region and a given season (defined so the precipitation events can be

Use of vertical-radar profiling to estimate porosity at ...

Final copy as submitted to Symposium on the Application of Geophysics to Engineering and Environmental Problems for publication as: Buursink, M.L., Lane, J.W., Jr., Clement, W.P., and Knoll, M.D., 2002, Use of vertical-radar profiling to estimate porosity at two New England sites and comparison with neutron log porosity, in Symposium on the Application of Geophysics to Engineering …

Monitoring Soil Moisture: Examples of Available Sensor ...

soils, which can then be used to estimate soil water content. The Theta Probe is close to an industry standard, Figure 2. Examples of capacitance probes used for soil moisture studies (Theta Probe ML2). Capacitance probes can be used in two configurations. In one mode, they can be arranged to continuously monitor a vertical

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