1) Can the authors show the trend of the groundwater depletion in this district, though recent in situ measurements? RESPONSE: Referring to the monitoring data of Water Bureau of Changping District [2], the shallow groundwater depth in the monitoring point of Machikou (marked in Figure 1) presented an increasing trend from 6.09 m in 2001 to 28.09 m in 2011, as shown below.
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Experimental study of land subsidence in response to groundwater withdrawal and recharge in Changping District of Beijing.
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