scholarly journals In-situ and Laboratory Analysis of Treated Marine Soil by Consolidation Methods

Author(s):  
Houssam KHELALFA ◽  
◽  
1970 ◽  
Vol 7 (4) ◽  
pp. 1093-1098 ◽  
Author(s):  
P. G. Killeen ◽  
C. M. Carmichael

The calibration of a portable three-channel gamma-ray spectrometer for in situ analysis of thorium, uranium, and potassium is discussed. A method of regression analysis is suggested as the best means of including all of the data available from the calibration stations. Calibration indicates a nonlinear relation between count rates obtained in the field and concentrations in parts per million obtained from laboratory analysis. The range of radioelement content must be taken into consideration and appropriate sets of calibration constants applied. As an example of the method, calibration constants are calculated for a portable gamma-ray spectrometer using data for the Blind River uranium region of Ontario.


2001 ◽  
Vol 27 (2) ◽  
pp. 195-199 ◽  
Author(s):  
C. Rodier ◽  
O. Vandenabeele-Trambouze ◽  
R. Sternberg ◽  
D. Coscia ◽  
P. Coll ◽  
...  

2011 ◽  
Vol 1 (1) ◽  
Author(s):  
Yara Bernaldo de Quirós ◽  
Óscar González-Díaz ◽  
Pedro Saavedra ◽  
Manuel Arbelo ◽  
Eva Sierra ◽  
...  

2019 ◽  
pp. 22-26

Origen de los manantiales de La Costa Verde Rubén Rojas, Modesto Montoya, Enoc Mamani, José Maguiña, Eduardo Montoya, Óscar Baltuano, Patricia Bedregal, Lucy Coria, Alcides Guerra, Santiago Justo y Tania Churasacari Instituto Peruano de Energía Nuclear, Canadá 1470, San Borja, Lima, Perú Facultad de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Lima, Perú Universidad Ricardo Palma, Av. Benavides 5440, Santiago de Surco, Lima, Perú DOI: https://doi.org/10.33017/RevECIPeru2012.0016/ Resumen Este trabajo trata de determinar el origen los manantiales de la playa Costa Verde, situada en los distritos de Barranco, Miraflores y Magdalena de la provincia de Lima, Perú. Esos manantiales, cerca y a nivel del mar, sobreviven al proceso de urbanización de los terrenos de cultivo, iniciado en la década de los años 70, el que  mermó el nivel freático del acuífero de Lima, e hizo desaparecer las filtraciones de agua en los acantilados. Para identificar el origen se ha efectuado análisis isotópico, físico químico y bacteriológico de muestras tomadas de 5 manantiales. Los valores de conductividad y temperatura, determinados in situ, son similares a los obtenidos en aguas del acuífero de Lima. Los análisis en laboratorio no mostraron indicios significativos de coliformes fecales ni totales, descartando posibles filtraciones de la red de alcantarillado de Lima. Las concentraciones isotópicas del agua difieren del promedio de las obtenidas para las aguas del acuífero de Lima, recargado por infiltraciones del río Rímac. Estos resultados sugieren que las aguas de los manantiales de la Costa Verde provienen de una recarga directa en la cuenca media del río, producto de la infiltración del río o de precipitaciones a una altitud del orden de 3600 m. Descriptores: acuífero, agua, costa, Lima, Perú. Abstract This paper tries to determine the origin of springs on the beach Costa Verde, located in the district of Barranco, Miraflores and Magdalena province of Lima, Peru. These springs, near and at sea level, survive the process of urbanization of agricultural land, started in the early 70s, which decreased the water table aquifer of Lima, and wiped the water leaks into the cliffs. To identify the source isotope physical, chemical and bacteriological of samples taken from five springs analysis has been carried out. The conductivity and temperature, measured in situ, are similar to those obtained on Lima aquifer waters. The laboratory analysis showed no significant signs of total or fecal coliform, discarding possible leakage from sewerage Lima. The water isotopic concentrations on springs differ from the average obtained on Lima aquifer waters, recharged by infiltration of the Rimac River. These results suggest that the water from the springs of Costa Verde come from a direct recharge in the basin of the river, due to infiltration of rainfall or river at an altitude of about 3600 m. Keywords: aquifer, water, coast, Lima, Peru.


2019 ◽  
Vol 134 (8) ◽  
Author(s):  
Anastasia Rousaki ◽  
Possum Pincé ◽  
Sylvia Lycke ◽  
Astrid Harth ◽  
Maximiliaan Martens ◽  
...  
Keyword(s):  

2015 ◽  
Vol 1122 ◽  
pp. 61-64 ◽  
Author(s):  
Eva Burgetová ◽  
Kristýna Michalová

The paper deals with the historical and structural survey of house “At the Three Axis” and drainage and ventilation systems discovered in the Prague Castle area. Failures and deterioration processes of these historical structures are described. The important achievements of in-situ inspection and laboratory analysis are presented, interventions and maintenance of systems proposed.


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