Geofisica Internacional最新文献

{"title":"Determination of Soil Properties from Electrical Measurements in Agricultural Plots, Villa de Arriaga, San Luis Potosí, Mexico","authors":"Christian Yamir Cordero Vazquez, Omar Delgado Rodríguez, Héctor José Peinado Guevara, María de los Ángeles Ladrón de Guevara Torres, Jonathan Ossiel Hernández Ramos, Víctor Manuel Peinado Guevara","doi":"10.22201/IGEOF.00167169P.2021.60.1.2037","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2021.60.1.2037","url":null,"abstract":"The knowledge of agricultural soil properties is crucial for the auspicious selection of crop, irrigation and fertilization types. This study contains the results of the field and laboratory application of electrical measurements used to obtain fines content, porosity, hydraulic conductivity and cation exchange capacity (CEC) in three agricultural plots for the purpose of growing barley. The values of fines content were attained using electrical measurements in laboratory soil samples and Ryjov's algorithm, which is comparable to the calculated values from textural analyses of Bouyoucos. In agricultural plot A, an Electrical Resistivity Tomography (ERT) profile, along with measurements of soil moisture and salinity, show high-resolution outcomes to determine soil properties, these are related to a clear image of soil thickness, as well as the identification of horizons. The Electrical Profiling (EP) survey conducted in the three plots showed higher productivity than the ERT method, resulting in soil properties maps. The plots display A-lowest, B-moderate and C-higher range of CEC values. This result conforms to crop yields per hectare and the fertility analysis carried out on each land plot, which confirms not only the effectiveness of the EP method and Ryjov's algorithm, but also their purpose for the study of agricultural soil properties.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"9 1","pages":"76-100"},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84503017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flujos e inventarios de carbono azul en manglares asociados a una laguna costera antropizada","authors":"Giovanni Aldana-Gutiérrez, A. C. Ruiz-Fernández, Libia Hascibe Pérez-Bernal, Francisco Flores-Verdugo, Tomasa Cuellar-Martinez, Joan-Albert Sánchez-Cabeza","doi":"10.22201/IGEOF.00167169P.2021.60.1.2011","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2021.60.1.2011","url":null,"abstract":"Los manglares, junto con los pastizales marinos y las marismas, se encuentran entre los ecosistemas costeros conocidos como ecosistemas de carbono azul. Estos ecosistemas son sumideros naturales de carbono, relevantes para la mitigacio?n del calentamiento global debido a que son capaces de secuestrar importantes cantidades de CO2 para produccio?n de biomasa, asi? como de almacenar materia orga?nica en sus sedimentos durante muy largo plazo. Se presentan los resultados de la evaluacio?n temporal de los flujos (g m-2 an?o-1) e inventarios (Mg ha-1) de carbono orga?nico (Corg) en nu?cleos sedimentarios recolectados en a?reas de manglar asociados a la laguna costera Estero de Uri?as (Mazatla?n, Sinaloa). La estrategia de trabajo incluyo? la caracterizacio?n geoqui?mica de los sedimentos mediante el ana?lisis de composicio?n elemental por espectrometri?a de fluorescencia de rayos-X para evaluar cambios en el origen de los sedimentos (terri?geno o marino); la determinacio?n de la distribucio?n de taman?o de grano para evaluar cambios en la hidrodina?mica de los sitios de estudio; y la cuantificacio?n de las concentraciones de Corg mediante un analizador elemental. Por u?ltimo, se presenta una estimacio?n del costo econo?mico de los impactos de las emisiones potenciales de CO2 como consecuencia de la oxidacio?n del Corg, debido a las potenciales perturbaciones de los sitios de estudio. La informacio?n generada representa una componente ma?s de los beneficios econo?micos de la preservacio?n de los ecosistemas de manglar, relevante en los planes de manejo de humedales costeros, cuya conservacio?n contribuye a la reduccio?n de emisiones de gases de efecto invernadero, y podri?a ser aprovechada como parte de una estrategia de adaptacio?n al cambio clima?tico basada en ecosistemas, en zonas tropicales y subtropicales alrededor del mundo.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"26 1","pages":"13-30"},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90801366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geometría de la zona sismogénica interplacas en el Sureste de Costa Rica a la luz de la secuencia de Golfito del 2018","authors":"I. Arroyo, Lepolt Linkimer","doi":"10.22201/IGEOF.00167169P.2021.60.1.2026","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2021.60.1.2026","url":null,"abstract":"Entre agosto y noviembre del 2018 ocurrio? una secuencia de sismos en el golfo Dulce, cerca de la ciudad de Golfito, al sureste de Costa Rica. El sismo principal tuvo una magnitud momento (Mw) 6.1 y fue sentido en Costa Rica y el oeste de Panama? con intensidades Mercalli Modificada ma?ximas de VI. En esta regio?n, la placa del Coco, junto con la cordillera ocea?nica del Coco, se subducen bajo la microplaca de Panama?. Usando los registros de la Red Sismolo?gica Nacional de Costa Rica, en este arti?culo se presenta la relocalizacio?n de esa sismicidad con la te?cnica de diferencia doble y se analiza la distribucio?n temporal y geogra?fica de la sismicidad, junto con el mecanismo focal e intensidades de los sismos de mayor taman?o. Los resultados muestran que la secuencia ocurrio? en la zona sismoge?nica interplacas, dentro del a?rea de ruptura del terremoto de Golfito de 1983 (Mw 7.4), entre 12 y 27 km de profundidad, en un agrupamiento buzante 35o al noreste bajo el golfo Dulce. Con base principalmente en estos resultados y en secuencias si?smicas previas, se propone que en el Sureste de Costa Rica la zona sismoge?nica tiene dimensiones de ~160 x 45 km. Adema?s, durante la secuencia de Golfito, ocurrio? la ruptura de una falla inversa (Mw 5.9) dentro de la placa del Coco bajo el golfo Dulce, asi? como la ruptura en fallas de rumbo dextrales en la microplaca de Panama? (Mw 4.6-5.6), a 50 km del golfo Dulce. El estudio de la sismicidad interplacas interciclo contribuye con el conocimiento de la dina?mica de la zona sismoge?nica interplacas. Esto es de particular importancia para el Sureste de Costa Rica, donde se han generado al menos seis terremotos destructivos con Mw > 7 desde 1803, lo que implica el peligro inminente de un pro?ximo terremoto en esta zona.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"7 1","pages":"51-75"},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84357075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ground motion prediction model for southeastern México removing site effects using the Earthquake horizontal-to-vertical ratio (EHVSR)","authors":"J. Lermo-Samaniego","doi":"10.22201/IGEOF.00167169P.2020.59.4.1894","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2020.59.4.1894","url":null,"abstract":"We propose a ground motion attenuation model (ground motion prediction equation, GMPE) for Southeast Mexico. We suppress site effects obtained from Earthquake Horizontal to Vertical Spectral Ratio (EHVSR) as a reliable estimate of site effects. (The attenuation model was built as a function of magnitude and hypocentral distance)). We used 86 seismic events with 5.0 ? Mw ? 8.2 (earthquake recordings for the 9/7/2017, Mw8.2 Tehuantepec earthquake are included), and distances between 52 ? R ? 618 km. They were recorded in nine stations of the Engineering Institute of the National Autonomous University of Mexico (II-UNAM) accelerometric network installed in the states of Chiapas, Oaxaca, Tabasco and Veracruz. Site effects at each of these stations were estimated by using the average EHVSR. Then, by means of this spectral ratio the site effects were suppressed at each station and for every record. This work points out the need to remove the site effect in the GMPE. The current models overestimate this effect.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"37 1","pages":"257-272"},"PeriodicalIF":0.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75842671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gutenberg-Richter b value studies along the Mexican Subduction Zone and data constraints","authors":"L. Ávila-Barrientos, F. Pichardo","doi":"10.22201/IGEOF.00167169P.2020.59.4.2019","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2020.59.4.2019","url":null,"abstract":"The Gutenberg-Richter b value is one of the most important tools for seismic hazard studies; this value is most useful in estimating seismicity rates, and also is related to ambient stress levels and shows changes precursory to the occurrence of large earthquakes. However, correct and reliable determinations of the b value are critically dependent on having adequate data samples. Studies oriented to corroborate whether precursory changes in the b value occur before large (M ? 7.0) along the Mexican subduction zone, were done based on data from the Servicio Sismologico Nacional (SSN, Mexico’s National Seismological Service) seismic catalog, from 1988 to 2018. Results for five earthquakes are suggestive that precursory changes may occur, but differences between measured values are not significant because of large uncertainties due to the SSN using different magnitude scales for small (below M ~4.5) and medium to large (above M ~4.5) magnitudes. We submit that until an appropriate scale is implemented for small magnitudes, results from b-value studies based on SSN data should be considered critically.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"6 1","pages":"285-298"},"PeriodicalIF":0.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82757607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Present-day stress state in northwestern Syria","authors":"M. Abdul-Wahed, M. Alissa","doi":"10.22201/IGEOF.00167169P.2020.59.4.2038","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2020.59.4.2038","url":null,"abstract":"Northwestern Syria is a key area in the eastern Mediterranean to study the active tectonics and stress pattern across the Arabia-Eurasia convergent plate boundary. This study aims to outline the present-day stress regime in this region of Syria using the fault plane solutions of the largest events recorded by the Syrian National Seismological Network from 1995 to 2011. A dataset of fault-plane solutions was obtained for 48 events having at least 5 P-wave polarities. The tectonic regime for most of these events is extensional and produces normal mechanisms in agreement with the local configurations of the seismogenic faults in the region. Strike-slip mechanisms are more scarce and restricted to certain areas, such as the northern extension of the Dead Sea fault system. The results of the current study reveal the spatial variations of SHmax orientation across the northwestern Syria region. This spatial variation of the present-day stress field highlights the role of main geometrically complex shear zones in the present-day stress pattern of northwestern Syria. However, these results show, regardless of the relatively small magnitudes of the studied events, they provide a picture of the local stress deviations that have currently been taking place along the local active faults.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"88 1","pages":"299-316"},"PeriodicalIF":0.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77464393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The recognition of the remnants of the Royal Road of the interior land using highresolution multispectral satellite images","authors":"J. Lira","doi":"10.22201/IGEOF.00167169P.2020.59.4.2018","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2020.59.4.2018","url":null,"abstract":"The Spaniards built the Royal Road of the Interior Land in the colonial times of Mexico. Such a road ranged between Mexico City and Santa Fe, New Mexico, USA. Some remnants still survive in Mexico, but their geographic location, position, length and condition are not well known. By means of fieldwork and a search of historic records left by the Spaniards, three segments of the Royal Road were identified. Three high-resolution multispectral images from the Pleiades satellite were acquired. Such images cover three zones where the Royal Road segments were located, and fieldwork was carried out. Due to degradation, the segments of the Royal Road show a low contrast with respect to the surroundings but a distinctive texture. A procedure of enhancement and sharpening was applied to the images based on the Vector Laplacian operator and Principal Component Analysis (PCA). Such a procedure enhances the texture and the edges of the Royal Road segments. An RGB false color composite formed by the Laplacian operator, the first principal component, and band 4, produced an image where the Royal Road segments are clearly observed. By means of fieldwork, the geographic coordinates and condition of the Royal Road segments were identified.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"14 1","pages":"273-284"},"PeriodicalIF":0.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83531142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subsoil Characteristics of Mexico City, acceleration and hysteretic energy spectra for the Mexico Earthquake of September 19, 2017","authors":"P. Quinde, E. Reinoso","doi":"10.22201/IGEOF.00167169P.2020.59.4.1892","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2020.59.4.1892","url":null,"abstract":"The September 19, 2017 intraslab earthquake (Mw7.1), whose epicenter was located near the limits between the states of Puebla and Morelos at approximately 120km from Mexico City, caused severe damage in these regions. In Mexico City more than 40 buildings collapsed, and hundreds had moderate to severe damage; dozens of them are to be demolished. This article analyzes the spectral ratios of accelerometric stations in the lake-bed of Mexico City with respect to the average Fourier spectra at hill zone sites in order to study and compare over time the changes in the behavior of local effects and their relationship with the damage presented during this earthquake; these ratios exhibit also the settlement problem in some places in the city due to over exploiting the aquifer for water supply purposes. Finally, pseudoacceleration and hysteretic energy maps for Mexico City with a discussion with a possible correlation with reported damages are presented.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"6 1","pages":"234-256"},"PeriodicalIF":0.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76940062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High precision measurements of Absolute Gravity in México: the Jalisco Block changes in gravity triggered by distant earthquakes","authors":"Alfredo Esparza, J. Arzate, L. Timmen, J. Silliker, M. Schilling","doi":"10.22201/IGEOF.00167169P.2020.59.3.2091","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2020.59.3.2091","url":null,"abstract":"espanolEn este trabajo se reportan los resultados de 16 mediciones de gravedad absoluta (GA) utilizando dos gravimetros de caida libre, el FG5X-220 de la Universidad Leibniz de Hannover (LUH) y el FG5X-252 del Centro Nacional de Metrologia (CENAM). Previo al establecimiento de nuevas estaciones gravimetricas de primer orden y a las campanas de adquisicion en el Bloque de Jalisco (BJ), se llevo a cabo la certificacion del gravimetro FG5X-252 a partir de dos comparaciones instrumentales; la primera con el FG5X-220 de LUH, el cual es un instrumento certificado de larga estabilidad y repetibilidad debajo de los 2 µGal, y la segunda a traves de una comparacion internacional con otros 13 instrumentos en las instalaciones de la NOAA en Table Mountain, Colorado, USA. Las campanas de medicion en el BJ se realizaron durante la estacion seca (Feb/Mar) los anos 2016 y 2018, e incluyo las estaciones de Chamela (CHA), Guadalajara (UGG), Manzanillo (MAN), Puerto Vallarta (UGP) y Tepic (TEP), esta ultima establecida como nueva referencia en el norte del bloque. Los resultados obtenidos de estas dos campanas en el BJ fueron comparados con los valores medidos en 1996 por la NOAA en esta misma region del oeste de Mexico. Los desplazamientos verticales observados en el lapso de dos anos en las estaciones CHA (+22.7 cm), UGG (+44.3 cm) y MAN (+54.6 cm) supera sustancialmente el promedio anual (2.8 cm, 4.2 cm y 3.6 cm respectivamente) con respecto a las mediciones de GA de 1996. En el mismo periodo, la estacion UGP subsidio 8.5 cm mientras que TEP permanecio muy estable (-0.25 cm). En septiembre de 2017 ocurrieron dos grandes sismos de magnitudes 8.2 y 7.1, con epicentros en la costa de Chiapas (07/sep/2017) y en el Estado de Puebla (19/sep/2017), que fueron registrados en algunas de las estaciones GPS de la red UNAVCO en los sitios MAN, UGG y CHA a pesar de que la fuente sismica mas cercana se localiza a mas de 500 km de distancia. El analisis de los datos adquiridos y otros datos geofisicos disponibles apoyan la hipotesis de que el sismo con epicentro en Puebla disparo la subduccion asismica de una porcion de la placa de Rivera (PR), lo que a su vez produjo el levantamiento en dichas estaciones. Concluimos que la subduccion asismica en la zona ocurre debido a la subduccion de una corteza oceanica hidratada que arrastra un importante espesor de sedimentos marinos, lo que genera una interfaz lubricada. EnglishWe report the results of 16 Absolute Gravity (AG) measurements distributed central and western Mexico employing two free-fall gravity instruments; the FG5X-220 of Leibniz Universitat Hannover (LUH), and the FG5X-252 instrument of the Centro Nacional de Metrologia (CENAM). Previous to the setup of new stations and acquisition campaigns, the FG5X-252 was certified in two steps, first a mutual comparison with the reference gravimeter FG5X-220, which have a long range stability below 2 µGal, and later through an international comparison at NOAA´s Table Mountain, Col.","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"16 1","pages":"155-168"},"PeriodicalIF":0.4,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74370698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radon as a natural radiotracer to investigate infiltration from surface water to nearby aquifers: a case study from the Barada riverbank, Syria","authors":"M. Al-Hilal","doi":"10.22201/IGEOF.00167169P.2020.59.3.2092","DOIUrl":"https://doi.org/10.22201/IGEOF.00167169P.2020.59.3.2092","url":null,"abstract":"espanolEl radon (222Rn) es un gas radiactivo inerte emanado constantemente de los suelos, rocas y aguas subterraneas, lo cual se debe a la desintegracion alfa del radio (226Ra). La radiactividad, la inercia y la naturaleza gaseosa del radon lo convierten en un indicador ambiental significativo para el analisis de algunos problemas hidrogeologicos que implican interacciones entre las aguas superficiales y subterraneas. El objetivo principal del presente estudio es investigar la posible infiltracion de las aguas superficiales del rio Barada, ubicado en la cuenca de Damasco, a un acuifero adyacente, que incluye algunos pozos que son explotados para contribuir a la red de agua potable de la ciudad de Damasco. La tecnica aplicada se basa en el principio de que, a medida que el agua del rio de radon bajo fluye a traves de la matriz del acuifero, absorbe continuamente el radon emanado de los sedimentos arcillosos del acuifero, alcanzandose el equilibrio entre la captacion de radon y la desintegracion radiactiva. La distribucion de la variacion espacial del radon en el agua subterranea se ha monitoreado en cuatro pozos preexistentes perforados en un sistema acuifero fluvial a lo largo del margen de la orilla del rio Barada. Los resultados revelaron un claro crecimiento de la concentracion de radon en tres o cuatro ordenes de magnitud, con lo cual se alcanzo un estado de equilibrio estable despues de aproximadamente cuatro vidas medias. Con base en la ley estandar de radiactividad, se estimo el tiempo de residencia del agua del rio infiltrado. Los datos hidroquimicos ademas de las investigaciones geologicas y las actividades de radon revelaron principalmente evidencias de infiltracion del agua del rio Barada al sistema de acuiferos cercano, el cual puede volverse vulnerable ante el riesgo de contaminacion ambiental. Finalmente, los resultados tambien mostraron que el aumento de radon en el agua subterranea se correlaciona positivamente con la concentracion de EC (R2 = 0.89) y, en menor medida, con los valores de TDS (R2 = 0.67). Esta asociacion evidente probablemente se deba a la presencia de algo de materia organica y minerales arcillosos en los sedimentos de la matriz del acuifero. EnglishRadon (222Rn) is an inert radioactive gas that is constantly emanated from soils, rocks and groundwater due to alpha decay of radium ( 226Ra). The radioactivity, inertness and gaseous nature of radon make it a significant environmental tracer for examining some hydrogeological issues that involve interactions between surface and ground waters. The main objective of the present study is to investigate possible infiltration from the surface water of the Barada River, located in the Damascus basin, to an adjacent aquifer, which includes some wells frequently exploited to support the drinking water network of Damascus city. The technique applied here is based on the principle that as low-radon river water flows through the aquifer matrix, it continuously absorbs radon eman","PeriodicalId":12624,"journal":{"name":"Geofisica Internacional","volume":"34 1","pages":"208-223"},"PeriodicalIF":0.4,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85303558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}