Isotope characteristics of groundwater and their implications in the area of Suzhou, Wuxi and Changzhou, China

摘要

The deep confined groundwater in the area of Changzhou, Wuxi and Suzhou, China, has no pollution on the whole, based on groundwater isotopes, whereas the shallow groundwater is polluted to a different degree. It is suggested that the deep confined aquifers in the above mentioned area belong to two different aquifers. The deep confined groundwater is in a close to half close state. The 14C age of groundwater varies from 10000 BP to 38000 BP, with the oldest groundwater found at the nearest exploitation center (along the line of three cities of Changzhou, Wuxi and Suzhou) and the youngest at the furthest exploitation center.