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  • Sediments  (20)
  • Chemistry
  • United States
  • Instituto Oceanográfico de la Armada, Guayaquil, Ecuador  (18)
  • Alexandria: National Institute of Oceanography and Fisheries  (3)
  • 2005-2009  (21)
  • 1
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    Estudio de las características sedimentológicas, de la desembocadura del Río Chone, frente a la ciudad de Bahía de Caráquez, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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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    Correlación estratigráfica en base a registros de pozos en el Golfo de Guayaquil (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 3
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    Características de la sedimentación marina litoral comprendida entre la Puntilla de Santa Elena y Punta Ancón, Provincia de Santa Elena, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 4
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    Estudio de los sedimentos del sector donde convergen los ríos Daule y Babahoyo, y las posibles causas que están formando un nuevo islote en ese sector (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 5
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    Clasificación de los sedimentos de la plataforma continental ecuatoriana - Provincia del Guayas en relación al porcentaje de carbonato de calcio (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 6
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    Estudio sedimentológico de la laguna costera El Soldado, Sonora, México (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 7
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    Caracterización de la calidad de las aguas y sedimentos del Río Atacames 2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 8
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    Morfología y sedimentación del sistema estuarino Estero Salado - Río Guayas. (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 9
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    Estudio geoquímico de los sedimentos en el Canal de Jambelí (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 10
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    Aplicación estadística en los bioensayos de toxicidad con sedimentos extraído del Estero Salado, canal de acceso al Puerto Marítimo de Guayaquil (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    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
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  • 11
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    Estudio de las características sedimentológicas de la zona litoral comprendida entre Anconcito y General Villamil (Playas), Provincia del Guayas, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Cabe señalar que el presente artículo, ya que ha sido redactado sólo en base a los datos granulométricos, y parámetros estadísticos, sucederá otro, en el que se incluye, el estudio mineralógico y químico de los sedimentos.
    Description: Based upon textural characteristics and statistical parameters, marine sediments were studies from 61 samples coming from the area between Ancocncito and General Villamil (Playas). Fine to very fine sand, moderatelly well sorted, negative assymmetricals are predominant in that area, with a percentage of 70%. Muddy sediments are located front of Ancocncito. Comparing these analysis with investigations performedon 1975, these are not significant variations related with texture and distribution of sediments.
    Description: Incluye ref.bibl., grafs., maps., tbls.
    Description: Published
    Keywords: Beaches ; Sediments ; Beaches ; Littoral zone
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  • 12
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    Distribución y enriquecimiento de metales traza en núcleos de sedimento de tres sistemas costeros del Estado de Sonora, México (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este trabajo tiene como objetivo principal, conocer el enriquecimiento y distribución de los metales traza y su relación con la materia organic y el tamaño medio de partícula (Mz) en la columna sedimentaria con el fin de determinar su acción e influencia ecológica en el medio ambiente marino.
    Description: Concentration of Ni, Cu, Pb, Mn y Fe, in sediment nuckeus of three lacunars of Sonora State, Mexico, were valued using methods of Absortion Atomic Spectrophotometry. established the existents relation between the concentration of named metals, organic matter contained and the granulometry with proposite of point the action or ecologic influence in acuatic environmental. The results suggest that resolution to distribution and form of studied metals, could be being transfered at the sediment by means of deposit of the organic material.
    Description: incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Distribution ; Organic matter ; Distribution ; Trace metals ; Sediments ; Inorganic matter ; Organic matter
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  • 13
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    Estudio de las características sedimentológicas del área comprendida entre Ancon y el Canal del Morro (Golfo de Guayaquil) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Se estudian 146 muestras de sedimentos superficiales de fondo del Golfo de Guayaquil. Se presenta las características de los sedimentos en base al análisis granulométrico, parámetros estadísticos y distribución de los sedimentos; y se comparan estas distribuciones con otras de trabajos anteriores. Se establece que los sedimentos arenosos y sus diferentes combinaciones predominan en el área, ocupando casi un 80% de la misma. Los sedimentos limosos se ubican en el Noroeste, mientras que en el Oeste sólo encontramos una pequeña cantidad de fragmentos de conchas. El análisis comparartivo con investigaciones realizadas en 1975, no presenta variaciones significativas en la textura y distribución de los sedimentos.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Sediments ; Nearshore sedimentation ; Sediment analysis ; Sediment composition ; Sediment distribution
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  • 14
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    Estudio de las características sedimentológicas del estero Santa Rosa en la Provincia de El Oro, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En este artículo se determina los tipos de sedimentos predominantes en el área de estudio, su distribución aproximada en el mismo, así como su posible proveniencia. Determinar la carga de sedimentos en suspensión del estero en una determinada época del año.
    Description: In this article presents the results of the sedimentological composition, and of the load of suspended sediments, present in the Santa Rosa Marsh, the Province El Oro. A total of 16 samples of superficial sediments of bottom was analyzed, and of whose results a predominance of muddy material, grain means, very poor classified, with positive asymmetries, although also there are sand and mixtures of both, but in minor proportion. Los rivers Guayas and Jubones are those that mainly contribute with suspended sediments. Also 24 water samples were analyzed, and whose loads gave relatively high values, being able to increase still more in winter due to rains.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Marshes ; Sediments ; Sediment distribution ; Sediment composition ; Sediment transport ; Marshes
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  • 15
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    Estudio de la materia orgánica en los sedimentos del Río Jubones, en el área comprendida entre el puente la Iberia hasta su desembocadura (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El principal objetivo de este trabajo es determinar cuantitativamente el contenido de la materia orgánica en base a la concentración de carbono orgánico, nitrógeno orgánico y fósforo total, tratando de sugerir el posible origen del material orgánico sedimentario en el Río Jubones.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Organic matter ; Organic matter ; Sediments
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  • 16
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    Evaluación geoquímica en la fase sedimentaria de ecosistemas costeros del Estado de Sonora, México (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Se elaboró este trabajo en los cuerpos lagunares Guásimas, Algodones y Lobos y contribuir, de esta forma, al conocimiento geológico marino de los sistemas costeros del litoral de Sonora.
    Description: Incluye ref.bibl., map., grafs.
    Description: Published
    Keywords: Evaluation ; Geochemistry ; Coastal lagoons ; Evaluation ; Geochemistry ; Sediments ; Coastal lagoons
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  • 17
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    Foraminíferos del rift de Galápagos (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Para este trabajo se analizaron un total de 17 muestras de sedimento para el estudio de los foraminíferos, se identificaron 10 especies de foraminíferos planctónicos y 8 especies de f. bentónicos. Las muestras fueron colectadas durante la expedición científica "GEOMETEP III", simultáneamente por el R/V "SONNE", de la República Federal Alemana y por el BAE "ORION", del Instituto Oceanográfico de la Armada del Ecuador, entre el 19 de Enero y el 16 de Febrero de 1983, en el rift de Galápagos, para un estudio de prospección en el área del 85/ 86°W, para iniciar un reconocimiento en la transecta de los 85° 30'W.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Foraminifera ; Sediments
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  • 18
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    Estudio del meiobentos en el Golfo de Guayaquil, (Río Guayas, Canal Cascajal y Estero Salado), Ecuador, en agosto de 1996 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Con este aporte al conocimiento de la meiofauna del Golfo de Guayaquil, se pretende comenzar a difundir los diferentes grupos de organismos que antes de este trabajo no se conocían que existían en nuestro país, esperando que se incentiven nuevos trabajos de investigación en el campo de la meiofauna, para llegar a saber realmente las especies que tenemos en el ecosistema más "rico y/o productivo" del Ecuador y del Pacífico Sud-este.
    Description: From the analysis of 16 sediments samples in 16 stations, located in the interior Gulf of Guayaquil, which includes: Guayas river, Cascajal chanel and "El Salado" estuary. 862 organisms are in 11 groups, belonging to 8 filum, were found from which, 6 filum were actually representatives of the meiofauna. The are: Nematoda, Artropoda (crustacea y Acari), Annelida (Polichaeta y Oligochaeta), Rotifera, Kinorryncha and Protozoa (ciliatea and Foraminifera). The filum which are not actually representative of this kinds organisms are: Mollusca and Chaetognatha. The nematoda are the most abundant and frecuent in the Gulf of Guayaquil with 73,2%. The total and relative abundance were observed in the Estero Salado while the low abundance were located in the Guayas river. Filum Kinorryncha and the order Acari that belong to the filum Artropoda are the first mentions for the Gulf of Guayaquil. tables that indicate the total and relative abundance of the differents groups of meiofauna, as well as their relationship with the salinity, temperature, oxygen and pH are presented and discused in this paper.
    Description: Incluye ref.bibl., ilus., grafs.
    Description: Published
    Keywords: Rivers ; Estuaries ; Meiobenthos ; Marshes ; Meiobenthos ; Sediments ; Rivers ; Marshes ; Estuaries
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  • 19
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    Geochemical and environmental studies of recent marine sediments and some hard corals of Wadi El-Gemal area of the Red Sea, Egypt (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This Journal is published by National Institute of Oceanography and Fishereies, Alexandria, Egypt
    Description: The distribution of (Fe, Mn, Zn, Cu, Pb, Ni, Co and Cd) concentrations were determined in surface marine sediments and coral reefs at Wadi El-Gemal in the Red Sea area. There were significant differences in concentrations of heavy metals in the marine sediments relative to the coral reefs. Some heavy metal concentrations in sediments and coral reefs in the study area are high compared to that in the impact areas of the Egyptian Red Sea coast. The results indicate that the high concentrations of heavy metals in marine sediments and coral reefs are particularly affected by the high contribution of terrigenous materials through the stream of Wadi El-Gemal. Generally, heavy metals concentration in the sediments decreased with increasing distance from the shoreline with the exception of Pb, which increased with increasing distance from the shoreline. On the other hand, Pb concentration in coral reefs is high compared to that in some sediment samples at Wadi El- Gemal area. The grain size, carbonate, organic matter, phosphorus and heavy metals distribution reflect marked changes in lithology, biological activities in the sea and land geology of the study area. Carbonate content mainly of biogenic origin varies from 5.7 –69.5% of the sediments. Organic matter contents of the sediments (1.7 to 6.5%) and phosphorus content (110 to 5097ppm) usually reflect significant terrigenous influences. On the other hand, heavy metals show an increasing tendency in the mud fraction of Wadi El-Gemal area. The present work reflects how much the marine sediments and coral reefs are influenced by natural impacts from this wadi. The collected data will be useful in management and suitable development of the area, beside being helpful as database in the future.
    Description: NIOF
    Description: Published
    Keywords: Hard corals ; Wadi El-Gemal ; Natural impacts ; Heavy metals ; Environment ; Marine ecology ; Environments ; Marine ecology ; Marine pollution ; Sediments ; Coral reefs
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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    Major controls of some metals distribution in sediments off the Nile Delta, Egypt. (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by NIOF, Alexandria, Egypt
    Description: The sediment samples that are collected during R/V CHAIN 1975 cruise to the southeastern Mediterranean have been used to determine the major controls of metals’distribution. The sediment samples were analysed mineralogically, chemically and texturally. The parameters measured included carbonate minerals, total carbonate, organic carbon, iron, manganese, copper, zinc, chromium, lead, nickel, cobalt, vanadium, calcium, magnesium, strontium, sand, silt and clay. The statistical analysis of data showed that four major factors control the distribution of metals in sediments of the Nile cone; These are: Factor 1 terrigenous mud-calcareous sand; Factor 2 Aragonite mud-terrigenous sand; Factor 3 Algal sand; and Factor 4 Aragonite. The percentages of terrigenous sand, mud and calcareous components of the Nile cone sediments greatly affect the elements spatial distribution. In addition to that, minor controls such as precipitation and coprecipitation may affect the elemental distribution. The distributions of iron, manganese, copper, zinc, chromium, lead, nickel, cobalt, and vanadium are associated mainly with the terrigenous mud fraction of the sediment whereas, calcium and strontium are mainly related to calcareous sands. Iron, copper, cobalt, lead and vanadium are partially related to montmorillonite. Lead is associated with acid feldspars and chromium is mainly controlled by terrigenous sand. The distribution of calcium and strontium is controlled by the coarsecalcareous fraction of sediments. Magnesium and manganese are associate with algal sand. The aragonite and calcite minerals are forming the majority of carbonate mud, which controls partially the distribution of calcium, strontium, lead and copper.
    Description: NIOF, Alexandria, Egypt
    Description: Published
    Keywords: Metals ; Factor analysis ; Coastal oceanography ; Sediments
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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    Ecological and fisheries development of Lake Manzalah (Egypt): hydrography and chemistry of Lake Manzalah (2006)
    Alexandria: National Institute of Oceanography and Fisheries
    Details
    Publication Date: 2021-05-19
    Description: This journal is published by the NIOF, Egypt
    Description: Lake Manzalah; the largest delta Lake in Egypt represents a dynamic system that has been undergoing continuous and pronounced changes since long times. In the last year’s this Lake faced drastic problems that retarded its environmental and fisheries development; the most serious one is the discharge of waste water. It is attempted in the present study to investigate the chemical characters of Lake Manzalah water during 2001-2002. Water temperature ranged from an average of 12.35oC in January and 29.14oC in July. Dissolved Oxygen, pH and total dissolved solids were found in ranges optimum for the living of marine and freshwater fish species. The average concentrations of nutrients lied in the following ranges: 1.24 to 4.89 μmol PO4 -3 l-1 , 5.08 to 28.73 μmol SiO4 -2 l-1 and 1.81 to 17.7 μ_mol NO3-1 l-1 The concentrations of phosphorus and nitrogen compounds were found to be relatively higher at the southern regions of the Lake near to the outlets of the drains.
    Description: NIOF
    Description: Published
    Keywords: Hydrography ; Water ; Chemistry ; Chemical composition ; Water content ; Environment ; Chemical composition ; Environments ; Water content ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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