Ladouche B, Maréchal J C, Lamotte C, Durand V, Bailly-Comte V, Hakoun V
BRGM, Univ Montpellier, Montpellier, France.
G-eau, UMR 183, INRAE, CIRAD, IRD, AgroParisTech, Institut Agro, BRGM, Montpellier, France.
Data Brief. 2023 Sep 9;50:109557. doi: 10.1016/j.dib.2023.109557. eCollection 2023 Oct.
Groundwater from various shallow and deep reservoirs converges in interaction with marine waters into the limestone aquifer of the Balaruc peninsula (Thau lagoon, southern France). This aquifer faces temporary phenomena of marine water intrusion through the Vise submarine spring located at -29.5 m below the lagoon level. Since the 1960s, seven flow reversal phenomena have occurred, the last one occurring between 11/28/2020 and 03/14/2022. During these phenomena, which can last from a few weeks to several months, the salty water is absorbed from the lagoon to the conduit of the submarine spring, which leads to the salinization of the underlying karst aquifer. The monitoring of flow, water specific conductivity and water temperature data from the karst submarine spring is a key element of the research project to understand the hydrogeological functioning of the karst aquifer under normal conditions or during flow reversal periods. This monitoring allows the characterization of the (in- or out-) flows at the submarine spring, the evaluation of the volume or mass balances, the identification of the hydrogeological and physico-chemical responses (water temperature, specific conductivity) observed within the karstic aquifer. Here, we present the means implemented offshore to acquire data at the submarine spring over the 06/25/2019 - 12/31/2022 time period together with lagoon water's physico-chemical parameters and levels and onshore groundwater's physico-chemical parameters and levels acquired at springs and boreholes from the karst aquifer.
来自各种浅层和深层水库的地下水与海水相互作用，汇聚到巴拉吕克半岛（法国南部的陶泻湖）的石灰岩含水层中。该含水层面临着海水通过位于泻湖水面以下29.5米处的维塞海底泉临时入侵的现象。自20世纪60年代以来，已经发生了7次水流逆转现象，最后一次发生在2020年11月28日至2022年3月14日之间。在这些可能持续数周至数月的现象中，咸水从泻湖被吸收到海底泉的管道中，这导致了下方岩溶含水层的盐渍化。监测岩溶海底泉的流量、水的电导率和水温数据是该研究项目的关键要素，目的是了解岩溶含水层在正常条件下或水流逆转期间的水文地质功能。这种监测能够表征海底泉的（流入或流出）流量，评估体积或质量平衡，识别在岩溶含水层中观察到的水文地质和物理化学响应（水温、电导率）。在此，我们展示了在2019年6月25日至2022年12月31日期间在近海实施的获取海底泉数据的方法，以及在泻湖水中获取的物理化学参数和水位，以及在岩溶含水层的泉水和钻孔处获取的陆上地下水的物理化学参数和水位。
