Abstract
Jinan is a famous spring city in China. Construction of underground metro system may block groundwater seepage, inducing the depletion risk of springs. This paper presents an assessment of the risk due to metro line construction to groundwater in Jinan City using Analytic Hierarchy Process (AHP) and Geographic International System (GIS). Based on the characteristics of hydrogeology and engineering geology, the assessment model is established from the perspectives of surface index and underground index. The assessment results show that the high and very high risk levels of surface index exceed 98% in the north region; and high and very high risk levels of underground index exceed 56% in urban center and southern region. The assessment result also shows that about 14% of the urban area belongs to very high risk level; regions of high risk are 20% in urban area, 9% in Changqing County and 43% in Pingyin County. In the high risk region, metro lines R1 to R3, which are under construction, and metro lines L1 to L5, which are planned, have very high and high risk. Therefore, risk control measures are proposed to protect the groundwater seepage path to spring.
Highlights
Jinan City is the capital city of Shandong Province, China
The objectives of this paper are: (i) to evaluate the risk level from the perspectives of surface index and underground index based on the characteristics of topography, hydrogeology and geology of
Jinan; (ii) to evaluate the regional risk of metro lines construction to groundwater system; and (iii) to discuss the risk level of metro lines, which are under construction and planned based on the assessed regional risk level
Summary
Spring basin is a groundwater catchment, where groundwater resources gather and form into springs. A historic city of China, is famous as the “Spring City” because of its numerous spring groups [1]. Jinan City is named the Jinan karstic spring basin for its abundant groundwater, cropping out to the surface into fountains. Jinan karstic spring basin is a closed groundwater system, where the recharge, runoff, and discharge are completely independent [2,3,4]. The spring basin includes the main spring group areas and the adjacent areas within the drainage separated by Yellow River. The hydrological characteristics of aquifer is rich in groundwater. The spring groups and rich aquifer groundwater together compose the special groundwater system in Jinan City [5]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
