To realize artesian discharge, there must be a certain height of liquid level, or an adequate level difference between the liquid stored and the outlet of unloading arm.

要实现自流付油，油品就必须有一定的液面高度，也就是要求储存油品液面与发油鹤管出口具有足够的高度差。

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In this paper, the relation between the discharge of Shentouquan artesian province and rainfall change is studied with the seasonal decomposition method.

运用季节分解的方法分析了我国北方著名岩溶大泉—神头泉流量与大气降雨变化的关系。

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The results show that the rainfall change is the main cause of affecting the discharge of the artesian province, there exists a lag time of 11 years between them;

结果表明，大气降雨变化是影响神头泉流量变化的根本原因，其间存在着11年的滞后时期；

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