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Now showing items 272-291 of 373
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Quality indices of groundwater for agricultural use in the Soconusco, Chiapas, Mexico
In Soconusco, Chiapas, in spite of the high availability of surface water, it is resorting to the use of groundwater. Knowledge about the quality of surface or groundwater used to irrigate crops in that region is low. This ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Quantifying the statistical distribution of Tropical Cyclone Activity in the historical record of the Dominican Republic
In this study, we re-examined the Official Hurricane Database from the National Hurricane Center (HURDAT-NHC), an agency associated with NOAA, for tropical cyclone activity from 1851 to 2012for the Dominican Republic on ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Quantitative Calculation of Aquifer Water Quantity Using TEM Data
Mine water is a menace to coal mining. Mine water quantity is generally detected by drilling in the coal mine roadway, and the disadvantage is high workload and low efficiency. Therefore, transient electromagnetic method ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Quaternary dating by electron spin resonance (esr) applied to human tooth enamel
This paper presents the results obtained from using electron paramagnetic resonance (EPR) to analyse tooth enamel found at the Aguazuque archaeological site (Cundinamarca, Colombia), located on the savannah near Bogota at ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Quaternary dating by electron spin resonance (esr) applied to human tooth enamel
This paper presents the results obtained from using electron paramagnetic resonance (EPR) to analyse tooth enamel found at the Aguazuque archaeological site (Cundinamarca, Colombia), located on the savannah near Bogota at ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Radiogenic components of the nigerian tar sand deposits
A combination of factors has prevented the exploitation of the Nigerian tar sand deposits to date, among which is the environmental factor which may pose some dangers to both physical and biological components of the area ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Rb-Sr Isotopic Geochronology and Geological Implications of Dongfeng Gold Deposit in Jiaodong Area
The superlarge Dongfeng gold deposit is located in the Potouqing faults-alteration belt of the eastern part of the ‘Zhao-Lai-gold ore belt’, which belongs to the northwestern part of the Jiaodong area. Tectonically, ore ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model
We estimate the crust-mantle (Moho) density contrast beneath Antarctica based on solving the inverse problem of isostasy and using the constraining information from the seismic global crustal model (CRUST2.0). The solution ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Reflexions on multidisciplinarity and geologic risk management in cuba
Geological risk management has special relevance in construction and the creation of new infrastructure in Cuba. The aim of this work was to focus on making some reflections about the multidisciplinarity analysis of ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Reinyección: una herramienta en geología ambiental
La aplicación de técnicas de reinyección para residuos provenientes de las actividades petrolíferas, dentro de estratos confinados en el subsuelo, permitirían dar un mejor manejo ambiental donde quiera que un pozo es ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Relación entre susceptibilidad magnética y contenido de minerales pesados en un depósito aluvial
A partir de observaciones realizadas en una perforación a orillas del Rio Nechi en elNoreste Antioqueño, se muestra la relación directa que existe entre el contenido de minerales en el dep6sito aluvial y la susceptibilidad ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Research into the effects of seawater velocity variation on migration imaging in deep-water geology
This paper aims at the problem that in deep water the migration quality is poor, and starts with the influence that velocity model accuracy has on migration, studying influence that variable seawater velocity makes on ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Research of behaviors of continuous GNSS station by signal analysis methods
Continuously Operating Reference Station (CORS) networks consisting of multiple GNSS systems have been set up and operating in many developed countries. In Turkey, CORS-TR has been operating. The aim of CORS-TR is a fast, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Research on Test-bench for Sonic Logging Tool
In this paper, the test-bench for sonic logging tool is proposed and designed to realize automatic calibration and testing of the sonic logging tool. The test-bench System consists of Host Computer, Embedded Controlling ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Reservoir characterization by multiattribute analysis: the orito field case
In order to characterize the Caballos formation reservoir in the Orito field in the Putumayo basin - Colombia, a multiattribute analysis was applied to a 50 km2 seismic volume along with 16 boreholes. Some properties of ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Resultados del uso de geodesia satelital para estudios geodinámicos en colombia
EI uso de la tecnología GPS provee mediciones directas de los desplazamientos debido al movimiento de las placas y la deformación intraplaca, información básica para el entendimiento de la cinemática de los movimientos, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Rio grande cone tectono-stratigraphic model – brazil: seismic sequences
Análisis sísmicos integrados con técnicas de interpretación, procesamiento, información de velocidades y datos geofísicos permiten modelar diferentes rasgos de tipo tectónico, estructural o geomorfológico. Este trabajo ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Sand dunes of the Gaza Strip (southwestern Palestine): morphology, textural characteristics and associated environmental impacts
Sand dunes are wide spread in the Gaza Strip and are present in its northern, central and southern regions. Thirty sand samples were collected at seven locations along the middle region of the Strip. The coordinates for ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Scanning electron microscope description of the afowo oil sand deposits in south-western nigeria
The Afowo oil sand deposits in parts of Southwestern Nigeria were described by scanning electron microscope for characterizing the reservoir sands, based on their clay content. Twelve core oil sand samples were collected, ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal. -
Seasonal Hydrological and Meteorological Time Series
Time series models are often used in hydrology and meteorology studies to model streamflows series in order to make forecasting and generate synthetic series which are inputs for the analysis of complex water resources ...Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal.
