地下水下降漏斗 depression cone of ground water ; groundwater depression cone

无水下降 no water drop

地下水位下降 drawdown ; groundwater recession ; phreatic decline ; declineofwatertable

道德水准下降 Moral Decline

水面下降 down surge ; Down-surging

地下水降落曲线 drawdown curve

地下水面下降 water-table decline

水位下降 drop of water level ; waterleveldepression ; waterlevellowering

地下水面比降 water-table gradient ; table gradient