What is it about?
Groundwater source and flow system have been changed by the water level fluctuation due to seasonal pumping. Urban groundwater is recharged from surface water from the immediate area. As a result of comprehensive discussing this paper and the previous paper (Abe et al. 2014), we led the following conclusion. High concentration carbonic acid supplied from surface water including soil water continually dissolves carbonates in the aquifer. It increases vulnerability to the acidification of the groundwater under the center of the city.
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Why is it important?
I think that it is very meaningful to clarify the dynamics of carbonic acid and carbonate in groundwater in the Nagaoka Plain. To elucidate the dynamics of it is an important issue for watershed management in elsewhere.
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations. This article also lead to new interesting research of carbon dynamics in the aquifer and has potential to a greater involvement in research of carbon cycle on Earth's surface.
Dr Hiroaki Abe
Chiba Daigaku
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This page is a summary of: Influence of Seasonal Pumping on Groundwater Sources and Flow System, Nagaoka Plain, Japan, Ground Water, October 2017, Wiley,
DOI: 10.1111/gwat.12600.
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