HIDROGEOTECNICAS, Conocimiento e Ingeniería

  Emerging pollutants (EPs) include a wide array of chemical compounds, as well as some microorganisms, which presence was unknown or unmeasurable until recently, or have recently started to be considered a threat towards the environment or animal and human health. No clear or homogeneous regulations exist for their measurement or control, and efforts should be made to assess their presence and offer solutions for their safe management, as well as to achieve an optimal protection of water resources. A previous study performed by our research group thoroughly studied a wide profile of EPs in El Hierro Island (Canary Islands) for the first time. Now, we present the study of the same panel of 70 EPs in La Palma Island (Canary Islands). 14 samples were collected in 2021, at different locations in La Palma island, representing seven municipalities (Los Llanos de Aridane, Santa Cruz de la Palma, El Paso, Breña Baja, Tazacorte, Barlovento and Fuencaliente) and four installation types (Pie...

 Slope movements are one of the natural hazards that most affect volcanic islands and often cause alarm to society, as they produce considerable material losses, affect communications and basic community services and, on occasion, involve the loss of human lives. Based on the classification of geotechnical units of the Canary Islands and the characteristic slope movements observed in each of them, the main goal of this article has been to elaborate a classification of movements versus units, as a tool for the management landslides hazards in volcanic environments. The applied methodology was based on the types of slope movements defined by the USGS, and on the research team three decades of experience of the study of geotechnical characterisation and slope instability of volcanic formations. A graphical classification of the possible movements affecting the volcanic geotechnical units has been prepared to make a preliminary estimate of the types of movements that will affect a slop...

  El cambio climático se ha consolidado como uno de los mayores desafíos globales que enfrentamos en la actualidad, afectando a comunidades de manera diversa y profunda. Al mismo tiempo, la Agenda 2030 de las Naciones Unidas ha establecido los Objetivos de Desarrollo Sostenible (ODS) como una hoja de ruta integral para abordar problemas interrelacionados, incluyendo la pobreza, la desigualdad, la salud y, crucialmente, la acción climática. A medida que aumentan la población, la economía y el consumo, también lo hacen las emisiones de gases de efecto invernadero, por lo que, a menos que se tomen medidas drásticas ahora, será más difícil y costoso adaptarse al cambio. De esta manera, las Islas Canarias se presentan como uno de los territorios más vulnerables, debido a su limitación en territorio y recursos, además, algunas de las islas se han declarado saturadas debido al crecimiento excesivo de visitantes, lo que aumenta la presión a la que se ve sometido el territorio y los residen...

  The Canary Islands are an archipelago belonging to Spain, which is, in turn, divided into two provinces. The eastern province is the closest to the Sahara Desert, with the island of Fuerteventura being only 100 km from the African coast. Additionally, Fuerteventura is the oldest island in the Canary archipelago and one of the islands where the desertification process is most acute. That is why, in this article, we have reviewed the current state of water resources on the island of Fuerteventura and how nature-based solutions can be a great environmental solution. Specifically, the artificial recharge of its aquifer through lagoon systems can be fundamental to recover its biodiversity, improve the quantity and quality of its water resources, and gradually slow down the desertification processes affecting the island. Finally, we present the main conclusions, especially after previous experience in the feasibility studies of artificial recharge of aquifers on another of the Canary I...

  The islands, due to their geographic condition of limited territory, are also limited in the resources available to them for the development of regular life. Spain counts with an archipelago that is itself an outermost European region, the Canary Islands, with unique characteristics due to its richness in groundwater and the use of desalination to support the water demand, which rises mainly due to agriculture and the tourism sector. In addition, this archipelago also suffers from further matters such as the contamination of coastal aquifers as a result of seawater intrusion, deficient wastewater treatment and a significant increase in the desalination of seawater, with the consequent energy demand that this entails. Therefore, this article has analysed the current situation of the resources in the Canary Islands, as well as the future challenges that arise, in a scenario of climate change, where temperatures are expected to increase in Spain. Las islas, debido a su condición geo...

  Article 9 of the Water Framework Directive (WFD) introduces cost recovery as an instrument aligned with the 'polluter pays' principle, aiming to contribute to the overall well-being of water bodies. In this regard, this research focuses on application of the cost recovery method in the context of the Canary Islands (Spain). The study provides a comprehensive description and analysis of the methodology established for the second cycle of planning (2015–2021) in the Canary Islands, offering a comparative assessment of results for each island. We employ a Stochastic Frontier Model, which allows us to assess the efficiency of different water production techniques. The results should be of great interest to public decision makers in the field of water management to minimize cost, allocate resources efficiently or review water tariffs. The findings underscore substantial variations in cost recovery across islands, emphasizing the need for enhanced water infrastructure methods and d...

  Datos de Precipitación Estación Precipitación (mm) A 50 B 60 C 55 D 45 1. Método de Promedio Aritmético Este es el método más simple, que calcula la precipitación media como el promedio de las precipitaciones registradas en las estaciones. Fórmula: Precipitaci o ˊ n Media = ∑ i = 1 n P i n \text{Precipitación Media} = \frac{\sum_{i=1}^n P_i}{n} Precipitaci o ˊ n Media = n ∑ i = 1 n ​ P i ​ ​ Donde P i P_i P i ​ es la precipitación en la estación i i i y n n n es el número de estaciones. Cálculo: Precipitaci o ˊ n Media = 50 + 60 + 55 + 45 4 = 210 4 = 52.5  mm \text{Precipitación Media} = \frac{50 + 60 + 55 + 45}{4} = \frac{210}{4} = 52.5 \text{ mm} Precipitaci o ˊ n Media = 4 50 + 60 + 55 + 45 ​ = 4 210 ​ = 52.5  mm 2. Método de Thiessen (Polígonos de Thiessen) Este método tiene en cuenta el área que influye en cada estación. Si tenemos información sobre el área de influencia de cada estación, podemos calcular una precipitación media ponderada. ...