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Radon measurements in groundwater mines in La Palma and El Hierro, Canary Islands (Spain)

Santamarta Juan C., Gutiérrez Luis Enrique Hernández, Martín Jesica Rodríguez, Pérez Lina, Bascones Rafael J. Lario, Moro Ángel Morales González, Pérez Noelia Cruz

Archives of Mining Sciences

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2020

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Vol. 65, no. 4

869--876

EN

In the Canary Islands, groundwater is the main source of drinking water. Groundwater mines have been the system used by the engineers of the archipelago to collect water from the ground. The Canary Islands are volcanic with soils characterized by being rich in uranium, the disintegration of which gives rise to radon gas. In this study, radon gas levels in the mines on two islands of the archipelago have been measured to study exposure to this gas in the galleries. Results show values much higher than the European regulatory limit concentrations.

2

Ecology and distribution patterns of Chara connivens (Charophyta, Characeae) on the Canary Islands : the first record from Fuerteventura

Rybak Andrzej S., Woyda-Ploszczyca Andrzej M.

Oceanological and Hydrobiological Studies

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2019

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Vol. 48, No. 4

368--380

EN

The paper presents the first record of a Chara connivens (Characeae) stand from Fuerteventura (Canary Islands, Spain). The species was previously recorded only on Tenerife and Lanzarote, mostly in marine and artificial habitats. Physicochemical parameters of water and morphological features of the thalli and plant community were analyzed. General habitat requirements of C. connivens populations located in Europe, North Africa, and South-West Asia were reviewed. The newly described stand was located in a natural rock crevice that was part of a riverbed in El Barranco de las Peñitas (Penitas Canyon). This habitat was unshaded and filled with brackish water. C. connivens co-occurred with Cladophora glomerata and Ruppia maritima. Our report on the presence of C. connivens in the Spanish territory of the Atlantic Ocean is the first in almost 40 years. The distribution of C. connivens and its plant associations on the Canary Archipelago are poorly explored, which is why this topic requires further research.

3

Galerías del agua (sztolnie wodne) na Wyspach Kanaryjskich

Zagożdżon P. P.

Hereditas Minariorum

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2015

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Vol. 2

111--122

PL

Na obszarze Wysp Kanaryjskich znajduje się kilka tysięcy obiektów o charakterze górniczym – są to sztolnie drążone od połowy XIX w. do ostatnich lat XX w. w celu pozyskiwania wód podziemnych. Ich koncentracja oraz położenie są konsekwencją wyjątkowej sytuacji hydrogeologicznej, wynikającej ze specyficznej budowy górotworu. W komunikacie przedstawiono zarys budowy geologicznej archipelagu, ze szczególnym uwzględnieniem wyspy Lanzarote, a także informacje dotyczące historii i charakteru prowadzonych tu robót górniczych. Syntetyczne studium literaturowe uzupełniono wynikami obserwacji terenowych przeprowadzonych na Lanzarote w odniesieniu do dwóch sztolni wodnych, zlokalizowanych w pobliżu osiedla Famara oraz w dolinie Barranco del Chafariz. Sztolnie wodne na Wyspach Kanaryjskich to obiekty stosunkowo słabo znane. Powinny one stanowić przedmiot zainteresowania geoturystycznego, dokumentują też ciekawy przykład intensywnej działalności górniczej.

EN

In the area of the Canary Islands, there are several thousands of underground objects created by mining activity. There are the adits hollowed since the mid-nineteenth century to the last years of the twentieth century in order to obtain groundwater. Their concentration and location are the consequence of a unique hydrogeological situation, resulting from the specific structure of the rock mass on the islands. The Communication outlines the geological structure of the archipelago, with a particular emphasis on Lanzarote, as well as information on the history and nature of mining works carried out there. Synthetic study of literature is supplemented by the results of reconnaissance conducted on the island of Lanzarote in two water adits located near the Famara settlement and in the valley Barranco del Chafariz. Water adits in the Canary Islands are not widely known. They can, however, be of interest to geotourists as they constitute an interesting example of intense mining activity.