Sentence examples for below ground surface in from inspiring English sources
Underground Transmission Lines: All underground DC lines consist of three individual cables buried 1 m below ground surface in a flat formation, with metallic return conductor at the middle position.
Prior to air injection, a 15×15-m 15×15-m of the vadose zone was excavated to the water table (∼1 m below ground surface) in order to visually observe air release distribution at the water table.
Historically, depth to water in the alluvial deposits ranged from 0 m near the lagoon and ocean to about 10 m below ground surface in upland areas (Birkeland 1972; Orme et al. 2000; Stone Environmental, Inc. 2004).
GWM2, GWM3, and GWM4 are 80 m below ground surface (aquifer in the Upper Muschelkalk), and in GWM2a, GWM3a, and GWM4a, wells are 20 m below ground surface (aquitards in the Lower Keuper) (see Figure 3).
The mean groundwater depth varies from 2 to 23 m below ground surface (bgs) in pre-monsoon to 2 14 m bgs in post-monsoon season (Machiwal and Singh 2015).
In general, the post-monsoon groundwater levels are easily augmented up to 2 5 m below ground surface (bgs) in response to regular recharge events, and the groundwater level remains steady in almost entire area due to absence of pumping at start of the post-monsoon season.
Water mains must be placed roughly 1 to 2 metres (3 to 6 feet) below the ground surface in order to protect against traffic loads and to prevent freezing.
We detected very high concentrations of H2 at the bottom of the peat, 3 4 m below the ground surface, in clayey sand.
If the Yucca Mountain site license is approved, the waste packages will be placed in tunnels several hundred meters below the ground surface in partially saturated volcanic tuff, but still well above the groundwater table.
In such setting also the borehole depth varies from 20 to 30 m while saturated thickness varies from 8 to 20 m below ground surface.
