Earth-Resistivity Tests applied to Subsurface Reconnaissance Surveys

2009 ◽  
pp. 89-89-15
Author(s):  
R. Woodward Moore
Keyword(s):  
Earth Resistivity ◽  
Reconnaissance Surveys

scholarly journals Mysid (Crustacea: Mysidacea) Distribution in the Bolgoda Estuarine System and Lunawa Lagoon, Sri Lanka

2017 ◽  
Vol 6 (1) ◽  
pp. 23-30
Author(s):  
N. N. Punchihewa ◽  
S. R. Krishnarajah ◽  
P. Vinobaba
Keyword(s):  
Sri Lanka ◽  
Management Strategy ◽  
Eichhornia Crassipes ◽  
Critical Role ◽  
Food Chains ◽  
Estuarine System ◽  
Pollution Indicator ◽  
Estuarine Systems ◽  
North Lake ◽  
Reconnaissance Surveys

Mysids are one of the most abundant and important fauna in estuarine hyperbenthic communities. They form important links in estuarine food chains and play a critical role in the cycling of energy within estuarine systems. Therefore, it is important to recognize the distribution of estuarine mysids in Sri Lanka. The present study was undertaken in Bolgoda estuarine system and Lunawa lagoon, in order to find out the distribution of mysids in these brackish water systems. Reconnaissance surveys were conducted, in Bolgoda North Lake, Panadura estuary of the Bolgoda estuarine system and the Lunawa lagoon from April 2012 to February 2013. The samples were collected using a hand held dip net, during day time at low tide along an eighty meter transect at the boundary of the estuarine waters. Mesopodopsis zeylanica was the only mysid species observed from the low water areas of the lagoon along the boundary of the stream. In each collection, it was recorded, higher percentages of females than the males. Mysids were recoded only from unpolluted areas and they were absent, where Eichhornia crassipes (water hyacinth) was widespread. The findings of this analysis could be used to establish the fact that boundary condition and polluted condition are having a great effect on presence of mysids. It may be due to their specific niche requirements and specialized habitats. Accordingly, mysids serve as pollution indicator species in estuarine ecosystems. An immediate management strategy is required in protecting the Bolgoda estuarine systems from dumping household pollutants as well as other pollutants and complete elimination of the invader plants like E. crassipes, in order to protect estuarine biodiversity.INTERNATIONAL JOURNAL OF ENVIRONMENT  Volume-6, Issue-1, Dec-Feb 2016/17, page: 23-30

Preliminary study on characteristics of earthquake precursor of earth resistivity anisotropy degree in East China

2004 ◽  
Vol 17 (2) ◽  
pp. 244-250 ◽  
Author(s):  
Feng Zhi-sheng ◽  
Yang Jian-jun ◽  
Mei Wei-ping ◽  
Geng Jie ◽  
Wang Xue-quan ◽  
...  
Keyword(s):  
Earthquake Precursor ◽  
East China ◽  
Earth Resistivity ◽  
Resistivity Anisotropy ◽  
Preliminary Study ◽  
Anisotropy Degree

A Study of Acid Mine Drainage Using Earth Resistivity Measurements

Ground Water ◽  
1990 ◽  
Vol 28 (3) ◽  
pp. 361-368 ◽  
Author(s):  
A. M. Ebraheem ◽  
M. W. Hamburger ◽  
E. R. Bayless ◽  
N. C. Krothe
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Resistivity Measurements ◽  
Earth Resistivity ◽  
Acid Mine

scholarly journals PHOTOGRAMMETRIC PROCESSING OF OSIRIS-REX IMAGES OF ASTEROID (101955) BENNU

2020 ◽  
Vol V-3-2020 ◽  
pp. 587-594
Author(s):  
K. L. Edmundson ◽  
K. J. Becker ◽  
T. L. Becker ◽  
C. A. Bennett ◽  
D. N. DellaGiustina ◽  
...  
Keyword(s):  
Control Process ◽  
Laser Altimeter ◽  
Shape Models ◽  
Spectral Interpretation ◽  
Global Mapping ◽  
Resource Identification ◽  
Imaging Sensors ◽  
Future Work ◽  
Selection Of ◽  
Reconnaissance Surveys

Abstract. The principal objective of the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission is to retrieve a sample of the asteroid (101955) Bennu and return it to Earth. OSIRIS-REx arrived at Bennu in December 2018. Images of the asteroid by the OSIRIS-REx Camera Suite (OCAMS) were photogrammetrically controlled to produce a global basemap and site-specific image mosaics essential to the selection of a primary and backup sample site, which were announced in December 2019. In the control process, OCAMS images were registered to shape models created from OSIRIS-REx Laser Altimeter (OLA) data and from the process of stereophotoclinometry. This paper summarizes the photogrammetric control to date of images collected at Bennu. We briefly review the mission and the OCAMS imaging sensors. We then describe the photogrammetric control process for the global mapping campaign and targeted reconnaissance surveys of candidate sample sites. Finally, we discuss ongoing and future work.

scholarly journals MEASUREMENT OF APPARENT EARTH RESISTIVITY BY USING BALL-ANTENNAS

1987 ◽  
Vol 7 (1) ◽  
pp. 7-10
Author(s):  
Koji Isoda ◽  
Toshio Ogawa
Keyword(s):  
Earth Resistivity

Characterization and Delineation of Gypsum Karst Geohazards Using 2D Electrical Resistivity Tomography in Culberson County, Texas, USA

2017 ◽  
Vol 22 (4) ◽  
pp. 411-420
Author(s):  
Adam F. Majzoub ◽  
Kevin W. Stafford ◽  
Wesley A. Brown ◽  
Jon T. Ehrhart
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Chihuahuan Desert ◽  
Two Dimensional ◽  
Resistivity Tomography ◽  
Delaware Basin ◽  
Earth Resistivity ◽  
Array Configuration ◽  
Resistivity Data ◽  
Karst Landforms

The Delaware Basin of W Texas and SE New Mexico is the western subdivision of the Permian Basin and a northern extension of the Chihuahuan Desert. The major evaporite unit within the Delaware Basin is the Castile Formation, which consists of gypsum/anhydrite and is highly susceptible to dissolution and karstification. Manifestations of karst within the Castile outcrop are abundant and include sinkholes, subsidence features and caves, both epigene and hypogene in origin. Land reconnaissance surveys conducted during 2015 and 2016 documented abundant karst landforms near major thoroughfares in Culberson County, Texas. Two dimensional (2D) electrical resistivity surveys were conducted at four sites to characterize and delineate karst related hazards, both laterally and vertically, associated with the road. The electrical resistivity data were collected with a multi-electrode earth resistivity meter using a dipole-dipole array configuration. The resistivity data were then processed using EarthImager2D to produce inverted profile sections of each site. Two-dimensional electrical resistivity tomography was shown to be an effective non-invasive method in detecting solution conduits, soil filled voids, and fractured bedrock in the shallow subsurface in addition to those directly observed on the surface.

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