Hydrogeological characteristics and water yield pattern of the Paleogene Zhujiagou formation in south-central Shandong Province

Abstract

The Zhujiagou formation, a set of calcareous conglomerates of terrigenous clastic deposition, is mainly distributed along the edge of the depression basins in south-central Shandong. Taking the Zhujiagou formation in the Wenkou basin and the Xinwen basin as the study area, the hydrogeological characteristics are analyzed through 1:50000 hydrogeological survey, hydrogeological drilling, geophysical exploration, pumping test, water quality analysis and other technical methods. The results show that the karst morphology of the Zhujiagou formation is dominated by corrosion fissure, karst hole and karst cave, which are mainly developed in the shallow layer of 150 m. The water yield property is obviously controlled by the fracture, and the water inflow of a single well in the fracture karst development area can be more than 300 m3/d, indicating practical water supply significance. The water yield pattern of the Zhujiagou formation features fracture-karst water storage structure of fractured calcareous conglomerate and fracture structure is the main controlling factor. This pattern has universality and applicability in south-central Shandong Province, which is of guiding significance for new water supply aquifers exploration and site selection and layout for wells.

Keywords

• south-central shandong
• zhujiagou formation
• calcareous conglomerate
• hydrogeological characteristics
• water yield pattern