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  • Sediments  (18)
  • By catch
  • Instituto Oceanográfico de la Armada, Guayaquil, Ecuador  (19)
  • Blackwell Publishing Ltd
  • Nature Publishing Group
  • Wiley
  • 2005-2009  (20)
  • 1945-1949
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  • 2005-2009  (20)
  • 1945-1949
Year
  • 1
    Publication Date: 2021-05-19
    Description: El principal objetivo de este estudio, fue la determinación de los tipos de sedimentos, predominantes en el área de estudios; su distribución aproximada en el mismo; así como su posible proveniencia. También se determinó en que ciclo de marea, se presenta la mayor carga de sedimentos en suspensión.
    Description: This article presents the results of the sedimentological composition, and of the load of suspended sediments, present in the outlet of the Chone river, in the country of Manabí. They were analyzed a total of 18 samples, of superficial sediments of bottom, and of whose results were determined, a predominance of fine sand, classified poor. The sand could be of marine origin, or it could also come, of the erosion of the cliffs, through the coasts current, due to that those, they are very unstable. As for the suspended sediments, 56 samples of water were analyzed, the same that they gave very low results.
    Description: Incluye ref.bibl., ilus., grafs., tbls.
    Description: Published
    Keywords: Rivers ; Sediments ; Sediments ; Rivers ; Sediment composition
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 2
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publication Date: 2021-05-19
    Description: El presente trabajo se basa en la interpretación de registros eléctricos y convencionales de pozos ubicados en el Golfo de Guayaquil dentro de una área aproximada de 868.911 hectáreas, entre las coordenadas 2° -4 latitud sur y 80° -81° longitud oeste. Los perfiles fueron corridos por ADA OIL EXPLORATION CO. entre 1969 y 1972, y mediante su interpretación se elaboraron las columnas estratigráficas respectivas y su correlación con el Graben de Jambelí, se logró determinar el tipo de sedimento predominante en la columna de cada pozo (Amistad 1,2,3,4; Tiburón 1; Esperanza 1). Además se ha realizado el cálculo de los parámetros petrofísicos a ciertos niveles de areniscas seleccionados, que pueden presentar algún interés como reservas de fluído (gas, aceite, o agua), tales como: resistividad de la zona no invadida, densidad de la roca, porosidad, factor de formación, resistividad del agua, saturación de agua, temperatura de formación de las rocas, gradiente geotérmico, salinidad del agua de formación.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Stratigraphic correlation ; Sediments
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
    Publication Date: 2021-05-19
    Description: El principal objetivo es el de determinar los tipos de sedimentos que predominan en el área de estudio, así como su distributión aproximada en el mismo.
    Description: This article presents the research results of the sea surface sediments samples, based upon texture characteristics and statistical parameters. 15 samples of bottom sediments, distributed in five perpendicular profiles to the line of coast, and each one three samples, from the area between Puntilla de Santa Elena and Punta Ancon (Province of Santa Elena, Ecuador) were analyzed. The result indicates a predominance of mixture, positive asymmetric, of sand and mud and, with poor classification, as well there is located fine grain sand in the zone near to the border. The muddy sediments come especially from erosion of Punta Ancon cliffs.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Sediments ; Sediment distribution
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 4
    Publication Date: 2021-05-19
    Description: Los objetivos de este artículo son: - Caracterizar el área de estudio en base a los tipos de sedimentos que predominan en el sector, a su distribución aproximada en el mismo, así como a su posible proveniencia. - Determinar la carga de sedimentos en suspensión que transportan los ríos. - Determinar las posibles causas que están originando la formación de una nueva isla en la desembocadura del Río Daule.
    Description: A study of 25 surfaces marine sediments samples of bottom was perfomed in the convergence of the Daule and Babahoyo rivers. It shows the principal characteristics of the sediments based upon granulometric analysis and statistical parameters. It determined that the sand, classified poorly, and positive assymetrical is predominant in the area of outlet of the Daule River, with a porcentage between 79 and 99% of same material. On the other hand, in the area of outler of the Babahoyo River the predominant material is the silt, of median grain, with a percentage between 64 and 87%. Also it observed muddy material, that is to say, a mixture of silt and sand but in small patches. The rivers of the area of study transport high quantity of sediments in suspension. As to sediments of the islet in formation, from the center toward the north, there is a layer of mud of 1 to 2.50 meters, that lies on sand. Between the possible causes that are forming the islet in the outlet of the Daule River are: The high quantity of sediment carried by the rivers, due to the torrential rains that are produced during an event El Niño; as well as the deforestation, mainly in the high and middle part of the basin of the Daule.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Keywords: Rivers ; Sand ; Sediments ; Granulometry ; Sediment transport ; Silt ; Rivers ; Sand ; Sediment analysis
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 5
    Publication Date: 2021-05-19
    Description: Los objetivos de este estudio se resumen así: 1. Determinación de la cubierta sedimentaria de la plataforma, su textura y la repartición de las diferentes clases de sedimentos. 2. Establecimiento de los tipos de sedimentación existentes en la plataforma en base a la distribución horizontal de los valores de carbonato de calcio obtenidos. 3. Determinación de la relación entre las características granulométricas y químicas de los sedimentos.
    Description: Incluye ref.bibl., maps., tbls.
    Description: Published
    Keywords: Classification ; Classification ; Sediments ; Calcium carbonates
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 6
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publication Date: 2021-05-19
    Description: El presente trabajo pretende contribuir a un conocimiento más amplio en la naturaleza del medio sedimentario de un cuerpo de agua del litoral de Sonora, tomando en consideración elementos ambientales básicos como son: fisiografía, geomorfología, materiales, energía, caracteríisticas físicas y químicas de los sedimentos y un análisis sobre organismos bentónicos (bivalvos).
    Description: The coastal lagoon El Soldado, Sonora, Mexico was studied in order to describe this sediments from the textural, phisical-chemical, chemical and mineralogic point of view and evaluate the possible relationship of this parameters with bentonic organisms (bivalves). The granulometric analysis were made using the technics by Folk (1974). The organic matter and carbonate were determined by loss on ignition method of Dean (1974). The salinity, pH and heavy metals were quantified respectively with the utilization of conductivimeter, potentiometer and atomic absortion spectropgotometer. the organisms were collected and quantified by areal unit for its posterior identification. The sediments distribution shows a definite pattern: more coarse in the area near of the lagoon mouth (Proximal zone), with the variation to silty sand (Intermedial zone) and to more fine textures in the interior of the water body (Distal zone).
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Coastal lagoons ; Sediments ; Coastal lagoons ; Lagoonal sedimentation ; Sediment chemistry ; Sediment distribution ; Sediment texture
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 7
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publication Date: 2021-05-19
    Description: La presente investigación se desarrolló como parte de Estudio de calidad de las aguas de los ríos de la Provincia de Esmeraldas durante mayo del 2002, como aporte del INOCAR a la Ilustre Municipalidad del Cantón Atacames, Institución que se encuentra realizando esfuerzos en los planes de operación para cumplir con la concepción del estado ecuatoriano sobre protección ambiental. Se presenta y evalúa los resultados obtenidos tanto en el estudio de calidad de las aguas como de los sedimentos del río Atacames en la Provincia de Esmeraldas, tomando en consideración la distribución y comportamiento superficial de parámetros físico, químicos y microbiológicos en un área que abarca entre 15 kilómetros aguas arriba y su desembocadura en el Océano Pacífico. Durante el estudio se estableció que, las aguas del río Atacames, principalmente las que se encuentran influenciadas por la población presentan graves problemas de contaminación por sus características químicas y microbiológicas (condiciones deficitarias de oxígeno, eutrofización, contaminación por coliformes totales y fecales) ocasionados por las descargas principalmente de desechos de tipo orgánico procedentes de la ciudad. Aunque existe la presencia de hidrocarburos del petróleo disueltos y dispersos en la zona, tales concentraciones están por debajo de los niveles establecidos en la legislación ecuatoriana, pero se considera necesario observar la presencia del contaminante, el mismo que a través del tiempo adquiere características de cronicidad con el peligro que esto reprsenta para la biomasa bentónica y para los organismos que se alimentan de ella, incluido el hombre.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Water quality ; Microbial contamination ; Organic wastes ; Oxygen ; Sewage ; Water quality ; River water ; Sediments ; Oxygen ; Petroleum hydrocarbons ; Microbial contamination ; Pollution effects ; Organic wastes ; Sewage
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 8
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publication Date: 2021-05-19
    Description: Durante el período 1984-1985 se realizaron estudios geológicos en el sistema estuarino Estero Salado - Río Guayas, los mismos que comprendieron trabajos de geomorfología, geofísica (sísmica) y sedimentología. Los resultados de esas investigaciones, que se presentan en este artículo, llevan a establecer las diferencias existentes entre el Estero Salado y Río Guayas como consecuencia probable del mayor aporte de sedimentos y corrientes de agua recibida por el Río Guayas, y de la carga adicional de sedimentos por la construcción de camaroneras y tala de manglares.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Estuaries ; Geomorphology ; Sediments ; Estuarine sedimentation ; Estuaries
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 9
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publication Date: 2021-05-19
    Description: Se presenta las características geoquímicas del Canal de Jambelí en base al análisis de 41 muestras de sedimentos del fondo marino, obtenidas durante marzo y junio de 1986 (Fig.1). Se identifica la presencia de dos dominios de sedimentación, el uno de tipo fluvial y el otro marino; así mismo una posible tendencia de avance del sedimento fluvial sobre el sedimento marítimo. Se establece además que la concentración de los constituyentes orgánicos se encuentran dentro de rangos normales y guarda relación con la textura del sedimento.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Geochemistry ; Geochemistry ; Sediments
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 10
    Publication Date: 2021-05-19
    Description: With the purpose of proving and determining in a short term the impact of the dredged material that can be caused by the organisms that inhabit the marine-estuary ecosystem, was performed toxicity bioassay of the sediment extracted from the bottom of the Salado Estuary. This sediment obstructs the access channels of the Marítime Port of Guayaquil. For this bioassay, was used white shrimp larvae of the species Litopenaeus vannamei, a commercially important organism that depends for its food on the organic detritus coming from the sediment and the column of estuary water in the studied area. The results obtained were analyzed applying the graphic arithmetic method and statistical analysis, through which it was determined that there is a direct relation between the concentrations and the organic effects with 95% certainty. The survival average of the organisms were obtained with the results of the performed test, the same which was statistiscally significant for all the analyzed samples. Through the Kurtosis test, it was observed that data had normal distribution. Furthermore, the Cochram test was used and it was determined that there is a homogeneity of the variances. No type of histopathological abnormality was found that could be considered significant. Furthermore, during and after the bioassay, the absence of pathogenic bacteria was observed. In the same way, the analysis for the white statin virus (WSSV) was negative.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Bioassays ; Toxicity ; Statistical analysis ; Bioassays ; Toxicity ; Marine organisms ; Sediments ; Statistical analysis ; Kurtosis ; Dredged samples
    Repository Name: AquaDocs
    Type: Journal Contribution
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