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Application of short time series analysis for the hydrodynamic characterization of a coastal karst aquifer: the Salento aquifer (Southern Italy)
Journal of Hydroinformatics ( IF 2.7 ) Pub Date : 2022-03-01 , DOI: 10.2166/hydro.2022.135
Gabriella Balacco 1 , Maria Rosaria Alfio 1 , Alessandro Parisi 1 , Andreas Panagopoulos 2 , Maria Dolores Fidelibus 1
Affiliation  

Daily precipitation and groundwater level data, registered at 7 rain gauge stations and 11 monitoring wells in the Salento coastal karst aquifer (Southern Italy) were subject to short time series analyses to evaluate the hydrodynamic response of the aquifer. Results show that the Salento karst system has in general great storage capacity, which suggests a poor degree of aquifer karstification, and dominance in the permeability structure of not well-developed hierarchical karst networks. Baseflow generally dominates on quick flow, which only occasionally occurs. The dominant hydraulic behaviour is unimodal baseflow with a bimodal baseflow and quick flow one from time to time. Some local specific features, which emerge depending on the rainfall frequency and depth, and the geological and structural characteristics, point out that some components of the permeability structure, as the epikarst and major faults, only activate depending on the characteristics of the input. The study is novel because the analyses concerned specific sets of hydrological years from 2007 to 2011; also, because the analysis was conducted for a coastal karst aquifer of significant size, characterized by a regional groundwater flow system with an unsteady lower boundary, without inland freshwater springs, and significant exploitation by wells.



中文翻译:

短时间序列分析在沿海岩溶含水层水动力特征中的应用:Salento 含水层(意大利南部)

在萨伦托沿海岩溶含水层(意大利南部)的 7 个雨量计站和 11 个监测井记录的每日降水量和地下水位数据进行了短时间序列分析,以评估含水层的水动力响应。结果表明,萨兰托岩溶系统总体上具有较大的蓄水能力,这表明含水层岩溶化程度较差,在不发达的分层岩溶网络的渗透率结构中占主导地位。基流通常在快速流上占主导地位,这只是偶尔发生。主要的水力行为是单峰基流,有时会出现双峰基流和快速流。根据降雨频率和深度以及地质和结构特征出现的一些当地特定特征,指出渗透性结构的某些组成部分,如表​​岩溶和主要断层,仅取决于输入的特征而激活。这项研究之所以新颖,是因为分析涉及 2007 年至 2011 年的特定水文年份;此外,因为该分析是针对一个规模很大的沿海喀斯特含水层进行的,其特点是区域地下水流动系统具有不稳定的下边界,没有内陆淡水泉水,并且有大量的水井开采。

更新日期:2022-03-01
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