Typically, though, the water table may be tens or hundreds of meters below the surface.
不过一般来讲，地下水位可能会位于地表以下数十或数百米。
If no drainage system exists, the water table rises, bringing dissolved salts to the surface.
如果没有排水系统，地下水位就会上升，把溶解的盐带到地表。
In some cases, the water table reaches Earth's surface, where it is expressed as rivers, lakes and marshes.
在某些情况下，地下水位到达地球表面，在那里以河流、湖泊和沼泽的形式表现出来。
Water in the vadose zone drains down to the water table, leaving behind a thin coating of water on mineral grains.
包气带中的水会沉降到地下水位，只在矿物颗粒表面留下一层薄薄的水膜。
Excess water from irrigation sinks down into the water table.
灌溉产生的多余水分渗入地下水。
The water table is the underground boundary below which all the cracks and pores are filled with water.
地下水位是地层岩石裂缝和孔隙充满水的边界。
Environmentalists say that diverting water from the river will lower the water table and dry out wells.
环保主义者称引流河水将导致地下水位下降和水井干枯。
In places, the water table is declining at a rate of a meter a year, necessitating the periodic deepening of wells and the use of ever-more-powerful pumps.
在一些地方，水位正以每年一米的速度下降，需要定期加深井并使用更强大的水泵。
Because the surface of the water table is not flat but instead rises and falls with topography, groundwater is affected by gravity in the same fashion as surface water.
由于地下水位不是平面的，而是随着地形起伏的，所以地下水和地表水一样受到重力的影响。
If the water table intersect the land surface, groundwater will flow out onto the surface at springs, whether to be collected there or to subsequently flow farther along a drainage.
如果地下水位与地表相交，地下水将在泉水处流出地表，聚集于此或是随后沿着排水系统进一步流动。
When the water table is at normal height, the fire dies down when it hits the earth.
当地下水位处于正常高度时，火焰在触及地面时很快就会熄灭。
Fracking can damage the water table, disrupt communities and even cause earthquakes.
用水力压裂技术采气的过程会破坏地下水位，影响周边环境，甚至引起地震。
A river cutting a valley may cut through a water table and the non-porous rock beneath it.
穿过山谷的河流，可能穿过地下水位和它下边的不渗透岩石。
Wells can be drilled, or dug, depending on the soil and rock and the height of the water table.
可以钻井或打井，视土壤、岩石和地下水位的高度而定。
The water table is falling fast in densely populated and poor regions of China, Mexico and India.
在中国、墨西哥和印度人口稠密的贫穷地区，地下水位在急速下降。
As Wells are drilled and the water table drops, the underlying soil compacts, much like a dried-out sponge.
随着钻井活动导致地下水位下降，下层土壤正变得密实，就像失水的海绵一样。
Landowners, whose fields will benefit from the resulting rise in the water table, donate some of their labor.
土地的所有者则会捐赠一些他们的劳力，因为这一工程带来的地下水位上升对他们的农田有益。
Below the water table at static equilibrium, hydrostatic pressure potential increases with increasing depth.
当静态平衡时，在水面以下，静水压力随深度而增加。
Below the water table at static equilibrium, hydrostatic pressure potential increases with increasing depth.
在水面以下，当静态平衡时，静水压力随深度而增加。
In wet periods, when the water table was high, animals could easily drink from seepage ponds near the surface.
在地下水位较高的雨季，动物们可以轻易喝到地面渗流水塘的水。
This decrease in the water table is a major contributor to land subsidence - New Orleans, like Venice, is sinking.
地下水位的降低则是地表陷没的元凶，而新奥尔良，和威尼斯城一样，正在下陷。
More than a century of groundwater over-exploitation in Vietnam has drawn the water table down and, with it, arsenic.
在越南长达一个多世纪的地下水过度开采使地下水位下降，与此同时，砷也随之深入。
After heavy rains or after snow melts in the spring, there will be more ground water, and the water table will be higher.
大雨之后，或在春雪消融之后，地下水会增多，地下水位会升高。
In dry periods, the water table will be lower, or it will disappear altogether, because no water is soaking into the ground.
干旱时节，地下水位会降低，或者全然消失，因为没有水渗透到地里。
Dewatering becomes a major operation when the excavation lies below the natural water table and intercepts the groundwater flow.
当挖方位于天然地下水面以下时或有地下水流经时，排水就成为一个主要的工序。
Heavy metals could leech into the water table or the sea, they say, where they could harm people, reefs and other Marine wildlife.
这些环保人士说，重金属可能会渗入地下水层或者海水里，给人类、珊瑚以及其他水生生物带来危害。
There is also evidence that the water table is declining, forcing farmers to use poorer quality water containing high levels of arsenic.
也有证据显示，地下水位正在下降，逼迫农民们使用更低质量的水，这样的水含砷量较高。
Fields become less resistant to water stress and the water table is no longer resupplied by water filtering through, worsening the effects of droughts.
农田的抗水分胁迫能力下降，而且地下水位得不到渗透水的补充，加重了干旱的影响。
Fields become less resistant to water stress and the water table is no longer resupplied by water filtering through, worsening the effects of droughts.
农田的抗水分胁迫能力下降，而且地下水位得不到渗透水的补充，加重了干旱的影响。
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