Listar Investigación y Desarrollo por autor "Alcalá, Francisco Javier"
Mostrando ítems 1-20 de 22
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Article
A Framework to Assess Natural Chloride Background in Coastal Aquifers Affected by Seawater Intrusion in Eastern Spain (2024)
Grima-Olmedo, Juan; Ballesteros-Navarro, Bruno; Pulido-Velazquez, David; Renau-Pruñonosa, Arianna; Alcalá, Francisco Javier; Llopis-Albert, Carlos; Jiménez-Gavilán, Pablo; Milkov-Ivanov, Nikolay; Baena-Ruiz, Leticia; Grima-Olmedo, Carlos (Multidisciplinary Digital Publishing Institute (MDPI), 2023)The protection of groundwater resources in coastal aquifers is an increasingly important issue worldwide. To establish threshold values and remediation objectives, it is essential to know the natural background concentrations ... -
Article
A K-Nearest Neighbors Algorithm in Python for Visualizing the 3D Stratigraphic Architecture of the Llobregat River Delta in NE Spain (2024)
Bullejos, Manuel; Cabezas, David; Martín-Martín, Manuel; Alcalá, Francisco Javier (MDPI, 2022)The k-nearest neighbors (KNN) algorithm is a non-parametric supervised machine learning classifier; which uses proximity and similarity to make classifications or predictions about the grouping of an individual data point. ... -
Article
A Python Application for Visualizing the 3D Stratigraphic Architecture of the Onshore Llobregat River Delta in NE Spain (2024)
Bullejos, Manuel; Cabezas, David; Martín-Martín, Manuel; Alcalá, Francisco Javier (MDPI, 2022)This paper introduces a Python application for visualizing the 3D stratigraphic architecture of porous sedimentary media. The application uses the parameter granulometry deduced from borehole lithological records to create ... -
Article
An Overview of the Environmental Impact Assessment of Mining Projects in Chile (2024)
Rodríguez-Luna, Dante; Encina-Montoya, Francisco; Alcalá, Francisco Javier; Vela, Nuria (MDPI, 2022)In accordance with the Sustainable Development Goals of the United Nations, the Environmental Impact Assessment (EIA) is the main management tool used to identify and prevent the impact of productive activities on the ... -
Article
Assessing the sensitivity of a Mediterranean commercial rangeland to droughts under climate change scenarios by means of a multidisciplinary integrated model (2020)
Martínez-Valderrama, Jaime; Ibáñez, Javier; Ibáñez, M. A.; Alcalá, Francisco Javier; Sanjuán, Maria E.; Ruiz, Alberto; del Barrio, Gabriel (Elsevier Ltd, 2021-02)Rangeland productivity is strongly conditioned by the amount and temporal distribution of precipitation. Thus, the worsening of droughts with climate change could be a serious threat to their existence. This paper presents ... -
Article
Climate change impacts on renewable groundwater resources in the andosol-dominated Andean highlands, Ecuador (2024)
Senent-Aparicio, Javier; Peñafiel, Lilia; Alcalá, Francisco Javier; Jimeno-Sáez, Patricia; Pérez-Sánchez, Julio (Elsevier B.V., 2024)Climate change, coupled with adaptive human actions, will affect water resource access and availability for environmental requirements. Hydrological modelling is an effective strategy for forecasting climate and human ... -
Article
Combining of MASW and GPR imaging and hydrogeological surveys for the groundwater resource evaluation in a coastal urban area in southern Spain (2021)
Alcalá, Francisco Javier; Martínez-Pagán, Pedro; Paz, Maria Catarina; Navarro, Manuel; Pérez-Cuevas, Jaruselsky; Domingo, Francisco (MDPI AG, 2021-04-01)This paper conceptualizes and evaluates the groundwater resource in a coastal urban area hydrologically influenced by peri-urban irrigation agriculture. Adra town in southern Spain was the case study chosen to evaluate the ... -
Article
Composting as an Alternative for the Treatment of Solid Waste from the Kraft Pulp Industry (2024)
Zambrano Riquelme, Marcia; Rodríguez-Luna, Dante; Alcalá, Francisco Javier; Rubilar, Olga; Alvear, Marysol; Encina-Montoya, Francisco; Vidal, Gladys (MDPI, 2023)The increasing industrial pulp production has led to a negative growth of the associated solid wastes, thus making necessary alternative ways of handling them in suitable sanitary landfills to minimize adverse effects on ... -
Article
Confidence of a k-Nearest Neighbors Python Algorithm for the 3D Visualization of Sedimentary Porous Media (2023)
Bullejos, Manuel; Cabezas, David; Martín-Martín, Manuel; Alcalá, Francisco Javier (MDPI, 2023-01)In a previous paper, the authors implemented a machine learning k-nearest neighbors (KNN) algorithm and Python libraries to create two 3D interactive models of the stratigraphic architecture of the Quaternary onshore ... -
Article
Ground Penetrating Radar Attenuation Expressions in Shallow Groundwater Research (2020)
Paz, Maria Catarina; Alcalá, Francisco Javier; Ribeiro, Luís (Society of Exploration Geophysicists, 2020-03-01)The electromagnetic-wave attenuation coefficient determines the overall resolution and effective penetration depth of ground penetrating radar (GPR) surveys. Despite this relevance to the design of proper GPR surveys, the ... -
Article
Integration of Electrical Resistivity Tomography and Seismic Refraction Tomography to Investigate Subsiding Sinkholes in Karst Areas (2024)
Jabrane, Oussama; Martínez-Pagán, Pedro; Martínez-Segura, Marcos A.; Alcalá, Francisco Javier; El Azzab, Driss; Vásconez-Maza, Marco D.; Charroud, Mohammed (MDPI, 2023)Operational and safety issues associated with subsiding sinkholes in karst areas start with the definition of fractures and joints, causing ground weakness. Conventional geotechnical boreholes and geological mapping must ... -
Article
Miocene evolution of the External Rif Zone (Morocco): Comparison with similar and lateral southern Mediterranean Tethyan margins (2024)
Martín-Martín, Manuel; Guerrera, Francesco; Cañaveras, Juan Carlos; Alcalá, Francisco Javier; Serrano, Francisco; Maaté, Alí; Hlila, Rachid; Maaté, Soufian; Sánchez-Navas, Antonio; Miclăus, Crina; ... (Elsevier B.V., 2024)The Miocene evolution of the External Rif Zone (NW Africa Plate) was determined through multidisciplinary analysis of fourteen successions. The updated stratigraphic framework shows how Miocene sediments rest on the ... -
Article
Paleogene evolution of the External Rif Zone (Morocco) and comparison with other western Tethyan margins (2024)
Martín-Martín, Manuel; Guerrera, Francesco; Cañaveras, Juan Carlos; Alcalá, Francisco Javier; Serrano, Francisco; Maaté, Alí; Hlila, Rachid; Maaté, Soufian; Tramontana, Mario; Sánchez-Navas, Antonio; ... (Elsevier B.V., 2023)The Paleogene evolution of the NW margin of the African Plate (Western External Rif Zone) was studied by means of multidisciplinary analyses of twenty-one stratigraphic logs, including tectofacies recognition, petro-mineralogical ... -
Article
System Dynamics for understanding desertification processes (2022)
Martínez-Valderrama, Jaime; Ibáñez Puerta, Javier; Gartzia, Rolando; Alcalá, Francisco Javier (Asociacion Espanola de Ecologia Terrestre, 2021-09)Desertification is a complex and counter-intuitive process whose study requires a multidisciplinary approach. This makes it an excellent field of research in which to apply System Dynamics (SD). It is a methodology for the ... -
Article
Tectono-sedimentary cenozoic evolution of the el habt and ouezzane tectonic units (External rif, morocco) (2020)
Martín-Martín, Manuel; Guerrera, Francesco; Hlila, Rachid; Maaté, Alí; Maaté, Soufian; Tramontana, Mario; Serrano, Francisco; Cañaveras, Juan Carlos; Alcalá, Francisco Javier; Paton, Douglas A. (MDPI AG, 2020-12-03)An interdisciplinary study based on lithostratigraphic, biostratigraphic, petrographic and mineralogical analyses has been performed in order to establish the Cenozoic tectono-sedimentary evolution of the El Habt and ... -
Article
The environmental impact assessment in aquaculture projects in chile: A retrospective and prospective review considering cultural aspects (2021)
Rodríguez-Luna, Dante; Vela, Nuria; Alcalá, Francisco Javier; Encina-Montoya, Francisco (MDPI, 2021-08-02)In recent years, social and environmental conflicts concerning the aquaculture sector have increased. These conflicts arise from the different perception that individuals, collectives, private com-panies and the State have ... -
Article
The environmental impact assessment in Chile: Overview, improvements, and comparisons (2020)
Rodríguez-Luna, Dante; Vela, Nuria; Alcalá, Francisco Javier; Encina-Montoya, Francisco (Elsevier Inc., 2021-01)In this study, we carried out a comparative analysis of the Chilean Environmental Impact Assessment (EIA) system using evaluation criteria compared against three countries to allow for an objective evaluation within the ... -
Article
The Environmental Impact Assessment of Sanitation Projects in Chile: Overview and Improvement Opportunities Focused on Follow-Ups (2024)
Rodríguez-Luna, Dante; Alcalá, Francisco Javier; Encina-Montoya, Francisco; Vela, Nuria (MDPI, 2022)The Environmental Impact Assessment (EIA) is a legal and administrative tool aimed to identify, predict, and interpret the impact of a project or activity on the environment and human health. The EIA also evaluates the ... -
Article
The Importance of Prevention in Tackling Desertification: An Approach to Anticipate Risks of Degradation in Coastal Aquifers (2024)
Ibáñez, Javier; Gartzia, Rolando; Alcalá, Francisco Javier; Martínez-Valderrama, Jaime (MDPI, 2022)Groundwater degradation is a major issue on an increasingly hot and thirsty planet. The problem is critical in drylands, where recharge rates are low and groundwater is the only reliable resource in a context of water ... -
Article
Using python libraries and k-Nearest neighbors algorithms to delineate syn-sedimentary faults in sedimentary porous media (2024)
Martín-Martín, Manuel; Bullejos, Manuel; Cabezas, David; Alcalá, Francisco Javier (Elsevier Ltd, 2023)This paper introduces a methodology based on Python libraries and machine learning k-Nearest Neighbors (KNN) algorithms to create an interactive 3D HTML model (3D_Vertical_Sections_Faults_LRD.html) that combines 2D grain-size ...