Integrating hydrochemical and microbial methods to identify hydraulic connections between three saltworks in southern Laizhou Bay, China

Yang, Fan; Jia, Chao; Chang, Wenbo; Yang, Haitao; Wang, Cong; Fan, Qinghe

Integrating hydrochemical and microbial methods to identify hydraulic connections between three saltworks in southern Laizhou Bay, China | Intégration de méthodes hydrochimiques et microbiennes pour identifier les connexions hydrauliques entre trois salines dans le sud de la Baie de Laizhou, en Chine Integración de métodos hidroquímicos y microbianos para identificar las conexiones hidráulicas entre tres salinas en el sur de la bahía de Laizhou, China 联合水化学和微生物方法识别中国莱州湾南部三个盐场之间的水力联系 Integrando os método s hidroquímico e microbial para identificar conexões hidráulicas entre três salinas no sul da Baía de Laizhou, China

2022

Exploring hydraulic connections between brine mining wells is of great significance to the development of geological resources; however, there are still challenges to accurately identifying these connections. In this study, a combination of hydrochemical and biological analyses was used to investigate the hydraulic connections between three saltworks (Yangkou, Hanting, and Changyi) in southern Laizhou Bay, China. The results showed that the groundwater recharge sources at Yangkou saltworks, and therefore the associated salts and hydrochemical composition of the brine, were different from those of the other two saltworks. The diversity and composition of the microbial community among the three saltworks were identified based on a high-throughput DNA sequencing method. The brines of Hanting and Changyi saltworks had greater similarity in terms of microbial diversity and composition, which was consistent with the hydrochemical results. Based on microbial analysis combined with hydrochemistry, the depths of the mining wells at Hanting saltworks were identified, along with the hydraulic connection with Changyi saltworks. As a tool to judge the hydraulic connections of geological reservoirs, microbial analysis combined with hydrochemistry may be applicable to a wider range of subsurface resources, such as oil and gas, which will provide new ideas for the rational development of underground resources.

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