研究人员指出，低频过程诸如河流流量和地下水水位的波动，通常不会对人类产生明显影响。
The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations.
几个月之前，就发生了一连串小地震，伴随而来的是地下水水位和当地地形海拔的变化。
In the months before, there had been a swarm of small earthquakes, along with changes in ground-water levels and the elevation of local terrain.
更不可思议的是地下水水位在上世纪八十年代的旱灾中暴跌后再度上升，水量开始变得充沛起来。
Amazingly, underground water tables that plummeted after the droughts of the 1980s had now begun recharging.
环保主义者称引流河水将导致地下水位下降和水井干枯。
Environmentalists say that diverting water from the river will lower the water table and dry out wells.
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。
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.
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。
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.
地下水位是地层岩石裂缝和孔隙充满水的边界。
The water table is the underground boundary below which all the cracks and pores are filled with water.
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。
In some cases, the water table reaches Earth's surface, where it is expressed as rivers, lakes and marshes.
由于地下水位下降，灌溉井干涸，居于世界之首的中国小麦产量，已经从1997年1.23亿吨的峰值下降了8%。
As water tables have fallen and irrigation wells have gone dry, China's wheat crop, the world's largest, has declined by 8% since it peaked at 123 million tons in 1997.
地下水位的上方是包气带，雨水从中渗透。
Above the water table is the vadose zone, through which rainwater percolates.
地下水位是不平坦的，而是通常随地势而变化。
The water table is not flat but usually follows the contours of the topography.
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。
If no drainage system exists, the water table rises, bringing dissolved salts to 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。
Typically, though, the water table may be tens or hundreds of meters below the surface.
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。
Water in the vadose zone drains down to the water table, leaving behind a thin coating of water on mineral grains.
在半岛北部，海拔足够低，因此古玛雅人能够经由被称为竖井的深层排水口或深洞探及地下水位。
In the northern peninsula the elevation is sufficiently low that the ancient Maya were able to reach the water table at deep sinkholes called cenotes, or at deep caves.
而在河北省，约230万公顷的农业土地严重地受到了连续两亇季节干旱的影响，地下水位已经跌落了0.6米。
In Hebei Province, some 2.3 million hectares of agricultural land have been severely affected by two consecutive drought seasons, and the level of groundwater has fallen by 0.6 meters.
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。
More than a century of groundwater over-exploitation in Vietnam has drawn the water table down and, with it, arsenic.
设计还可减轻该地区对众多庞大水泵的依赖，因水泵不仅可以抽掉暴风雨水，却也降低了本地区的地下水位。
The plan could lessen the reliance on the mammoth pumps that not only remove storm water but also lower the natural water table of the area.
一个小孩在地下水位旁忙着制作起泡沫的浓肥皂水并用勺子搅拌着，在她旁边还有一个小孩。
A child was at the water table and she was busy sudsing up some soap and stirring with her spoon, and there was a child next to her.
但是当地下水位很低的时候，泥炭层自己也会着火，使得大火更加难以扑灭。
But when it is low the peat itself catches light, making the fire much harder to extinguish.
产权提供配额，但是以色列的农民不想看到水被交易——更不想看到地下水位下降。
Rights provide quotas, but Israeli farmers do not want to see them traded-and the water table drops.
尽管难以在盐碱地里栽种树木，但覆盖地表和湿地的植被异常丰富，随着地下水位和PH值的细微变化而呈现不同的形态。
Though it is di? Cult to grow trees in the saline-alkali soil, the ground cover and wetland vegetation are rich and vary in response to subtle changes in the water table and PH values.
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。
This decrease in the water table is a major contributor to land subsidence - New Orleans, like Venice, is sinking.
地下水位一直在下降，温度却年年上升。
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。
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。
There is also evidence that the water table is declining, forcing farmers to use poorer quality water containing high levels of arsenic.
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