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Based on the data of water pumping test and releasing test, we systematically analyzed the hydrochemical characteristics of the Ordovician Limestone aquifer. We sorted the data, classified the water quality of each samples, drawed piper trilinear nomograph, and delineated hydro-chemical subsections of Ordovician limestone aquifer to analyze the Ordovician limestone aquifer water runoff features. The results shown that, Ordovician limestone groundwater flowed from the northeast, the east and the south to Tianqiao Spring. From the east boundary to the west, hydro-chemical subsections were runoff area, weak runoff area and stagnation area. Ordovician limestone groundwater flowed deeper and slower to the south of Tianqiao Springs, and the type of water quality charactered as that was in stagnant zone. Keywordslimestone groundwater; piper trilinear nomograph; hydro-chemical characteristics; the type of water quality

Study on the Runoff Characteristics of Ordovician Limestone Groundwater in Jinmen Coalmine