Key;
Laboratory;
of;
Water;
Cycle;
and;
Related;
Land;
Surface;
Processes,;
Institute;
of;
Geographic;
Sciences;
and;
Natural;
Resources;
Research,;
CAS,;
Beijing;
100101,;
China;
National;
Institute;
for;
Environmental;
Studies,;
Tsukuba;
305-8506,;
Japan;
Tianjin;
Institute;
of;
Geology;
and;
Mineral;
Resources,;
Tianjin;
300170,;
China;
地下水动态; 浅层地下水; 华北平原; 水位观测井; 放电模式; 影响因素; 山前平原; 横向补给;