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首页> 外文会议>International Conference on Environmental and Geological Science and Engineering >Assessing Radon in the karst spring waters: the case-study of the Capodifiume spring mixed waters, National Park of the Cilento, Vallo di Diano and Alburni-European Geopark (Southern Italy)
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Assessing Radon in the karst spring waters: the case-study of the Capodifiume spring mixed waters, National Park of the Cilento, Vallo di Diano and Alburni-European Geopark (Southern Italy)

机译：评估岩溶春水中的氡：Capodifiume春季混合水，Cilento国家公园，Vallo Di Diano和Alburni-Europe Geopark（意大利南部）

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摘要

Based on the results of previous geological, hydrogeological and geomorphological surveys, hydrochemical and isotopic tracer techniques have been applied for investigating the origin of significantly elevated Radon (~(222)Rn) activity concentrations detected at the highly NaCl/CaCO_3 mineralized Capodifiume karst spring group, located near the archaeological site of Poseidon-Paestum, Southern Italy. Compared to other karst springs in the Cilento and Vallo di Diano Geopark both Radon concentration and salinity show remarkably high values as well as a good correlation. Radon concentrations range between 367±20 and 111±8 Bq/l with an average of 230 Bq/l. The high Radon levels of the spring water can neither be explained by the composition of the karst aquifer rocks or the attached travertine deposits (limestone and dolomite), which both show low Radium (~(226)Ra) concentrations, nor by the dissolved Radium content of the spring water. In order to explain the contemporary high levels both of Radon and salinity, several measurement campaigns were carried out and collected data were analyzed, considering the Radon and Electrical Conductivity and Temperature, as useful parameters to differentiate between groundwater of different origin. Results suggest the presence of two different groundwater fluxes at Capodifiume springs originating from different karst aquifer. In fact the similar behavior of the three parameters in the area can be explained by the mixing of different kinds of groundwater. Considering the correlation and the similar behavior of Radon activity concentration, electrical conductivity and temperature, two different groundwater fluxes have been individuated. A different hydro-geological origin and pathway could be assumed to explain their characteristics. This is a first step of a future investigation that will focus on a quantitative analysis and assessment of the groundwater mixing at Capodifiume springs.
机译：基于先前地质，水文地质和地貌调查的结果，已经应用了水化学和同位素示踪技术来研究在高度NaCl / CaCO_3矿化岩二十五岩体岩溶弹簧组中检测到显着升高的氡（〜（222）RN）活性浓度的起源，位于意大利南部Poseidon-Paestum的考古遗址附近。与Cilento和Vallo di Diano Geopark的其他喀斯特弹簧相比，氡浓度和盐度都显示出显着高的值以及良好的相关性。氡浓度范围为367±20和111±8 bq / L，平均为230 bq / l。 Sppring水的高氡水平既​​不能通过喀斯特含水层岩石或附着的石灰岩沉积物（石灰石和白云岩）的组成来解释，这两者都显示出低镭（〜（226）Ra）浓度，也不是由溶解的镭泉水的含量。为了解释当代高水平的氡和盐度，考虑到氡和电导率和温度，以分析氡和电导率和温度，以分析不同起源的地下水的有用参数，分析了几个测量运动。结果表明，源自不同岩溶含水层的Capodifiume Springs两种不同地下水通量的存在。实际上，该区域中三个参数的类似行为可以通过混合不同种类的地下水来解释。考虑到氡活性浓度，电导率和温度的相关性和相似的性能，两种不同的地下水通量已被分别为单独。可以假设不同的水力地质起源和途径来解释它们的特征。这是未来调查的第一步，将重点关注Capodifiume Springs对地下水混合的定量分析和评估。

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