subsurface water

There are five water disasters in Jianghan Plain: flood, inundation , subsurface waterlogging, drought and water environment.

江汉平原存在五种水灾害: 洪灾 、 涝灾 、 渍灾 、 旱灾和水环境灾害.

Others send roots deep down to subsurface water supplies.

另一些则把根深深地扎入地下水源。

The subsurface warm water has been observed frequently in the summer ice-free sea area of the Arctic Ocean, that is, a temperature maximum occurred in water depths of 20 to 50 m.

在夏季北冰洋的无冰海域，经常可以观测到次表层暖水现象，即在水深20～50m的范围内发生海水温度的极大值。

Aiming at the comprehensive assessment of ground water environment in the Taihang Mountain area, continuous observation of the variation of subsurface flow formed by crevice water is carried out.

为了科学地对太行山区地下水环境进行综合评价，本试验采用了翻斗式自计量水技术，对该区普遍存在的裂隙潜流的动态变化过程进行新监测。

Hydrocarbon gases in the subsurface exit in free form, by absorbing on organic matter and mineral particles, or by dissolving in formation water.

地层中天然气常以游离气、吸附气和水溶气3种形式存在。

This study is concerned essentially with subsurface water.

这里的研究主要针对地下水.

The alimentation relationship between the surface water and the subsurface water is proved.

证实了本区地表河流和池溏水与地下水的补给关系。

By adding municipal wastewater in effluent of ANOXIC-OXIC ( A/ O) reactor as external carbon source, effects of external carbon source on nitrogen and phosphorus removal in subsurface flow and free water surface integrated constructed wetland were studied in pilot-scale.

采用向ANOXIC-OXIC（A/O）工艺出水中添加城市污水的方法，在中试规模上研究了外加碳源对潜流+表面流组合湿地脱氮除磷的影响。

Subsurface water applications usually permit additional simplification.

应用于地下水时,一般还允许进一步的简化.