water tables

The result is falling water tables in countries with half the world 's people , including the three big grain producers —— China , India and the U.S.

结果，全球半数人口所在国家的地下水位急剧下降，这其中包括三大粮食生产国——中国、印度和美国。

Water tables are falling throughout the northern half of China .

中国的北半部，地下水位普遍下降。

Millions of irrigation wells have significantly lowered water tables in almost every state .

数以百万计的灌溉井地下水水位均大幅下降，几乎每个邦都是如此。

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 .

随着地下水水位下降和灌溉井枯竭，中国的小麦——在全世界小麦产量中独占鳌头——自从1997年产量达到1。23亿旽的峰值之后已经下滑了8个百分点。

One of the problematic issues is the situation of ground water tables in China .

存在疑问的方面之一是中国地下水水位的问题。

Soil moisture dynamic characteristics in well irrigation areas in Beijing Plain with comparatively deep ground water tables

地下水埋深较大条件下井灌区土壤水分动态变化特征

Response of soil available P to different cropping systems , water tables and quanta of green manure application

不同稻作制、地下水位和绿肥量对土壤有效磷的影响

The approximate theory which applies to water tables of low slope is due to Dupuit .

应用于低坡度水面的近似理论来自于裘不依。

If these layers of rock follow the shape of a hill , then there are two water tables .

如果这些岩石层的走向与山形相同，那么，就会有两个地下水位。

Sediment deposits in ditches result in the raising of water tables and damage to crops .

泥沙淤积在排水沟引起地下水位上升，并危害作物。

The lower part was buried in the ground . Water tables are falling throughout the northern half of China .

下半部分埋在地下。中国的北半部，地下水位普遍下降。

You could see the various water tables , drainage trenchs , soil compositions and sweepage capacity .

你可以看到上面有地下水面、排水沟、土壤成分…还有下渗容量

However , with the alteration of Earth 's wobble the ocean and water tables shall not rise evenly all around Earth .

然而，地球摆动的改变将导致海洋和水平面的提升在地球上并不均匀。

Many water tables will fill underground before they affect the oceans however and this also could provide fresh water in regions that are barren otherwise .

然而会有很多水位首先会充盈地下河道，然后才影响海洋，而这也可以为那些干旱荒地提供淡水。

In the course of centuries , situations change : droughts and fires may come and go , soil may erode , water tables may rise and fall .

在树长达几百年的一生中，默默地注视外界的时过境迁，它看着洪水涨了又落，火灾起了又灭，土壤会被侵蚀，地下水位也会升了又降。

Imports of food - especially grain - are likely to jump in coming years as China 's farmland is eaten up by cities and water tables sink .

随着中国耕地被城市吞噬，以及地下水位的下降，未来几年内食品（其是谷物）进口可能会激增。

Global warming shall continue to melt the ice caps and glaciers causing the water tables to rise , and flooding certain regions of your continents .

全球变暖将继续融化冰山和冰盖，导致水域增长并淹没你们大陆的某些地区。

These river valley areas , which are seasonally flooded , or have high water tables for a large part of the year , are an important dry season farmland .

这些河谷地带常发生季节性洪水，在一年的大部分时间内均保持较高的水位，是旱季重要的农田。

So overuse of groundwater , mainly for irrigation , lowers the water tables , allowing air to reach the contaminated clay and release the arsenic .

所以过度取用地下水（要用于灌溉）低了地下水位，使空气得以接触有毒黏土而释放出砷。

The district is buying sand or water tables , blocks , play kitchens , easels and art supplies for every classroom that does not have them .

该学区正在为没有配备相关用品的教室购买沙盘或水盘、积木、玩具厨房、画架和美术用品。

Conversely , the farther from the equator , the greater the rise in the water tables causing more flooding as the wobble upon Earth is corrected .

相反，离赤道越远，水面提升就越大，当摆动被校正时就导致越多的洪水。

Rising sea levels , increasing salinization of water tables , and heat stress in association with air pollution are just some of the consequences of great concern in this part of the world .

海平面不断上升，潜水层日益盐化，以及与空气污染有关的热应力只是这个区域极令人担忧的一部分后果。

Results showed that : ( 1 ) No common diurnal variations were found in all the wetlands , and the diurnal patterns were weakly correlated to temperatures and water tables .

结果表明：（1）小兴安岭沼泽甲烷通量无统一的日变化规律，且与温度和水位这两个环境因子的相关性较弱。

Besides , contours and flow lines are mapped to make the spatial distribution and flow directions more clear , also dynamic variety of water tables is visualized by Timer method of Visual C + + .

同时，用等值线和流线来表示水位的空间分布、地下水汇流的方向，利用Visualc++的时间器实现了不同时刻水位的动态显示。

By simulating the movement of groundwater in soil plough layer , the pollution characters of groundwater contaminated by salinity and heavy metals in the plough layer were researched under different water tables , different pollution levels and various texture soils .

通过模拟不同水位、污染度的地下水在不同质地土壤耕层中的迁移，进行了地下水中盐分和重金属对土壤耕层污染规律的研究。

But , over the past decade , rainwater has made a comeback for those having to dig deeper as their water tables sink ; or whose groundwater has been infiltrated by fluoride , arsenic or salt .

但是在过去的几十年中，对于那些由于地下水位下降而不得不越挖越深或者地下水渗入了氟、砷或盐的人们，集雨的方法又回来了。

The little bar is actually a stone boat and sits on a lake with a small stage extending over the water and tables spread along the banks , a surprisingly serene , pastoral setting right in the middle of downtown Beijing .

这个小酒吧其实就是一条石舫，位于湖中，小小的舞台伸展到水面上，桌子则散布在岸边。地处北京市区中心地带，这里却是一幅难得的幽静田园风光。

In some school districts , 5-year-olds are doing what first or even second graders once did , and former kindergarten staples like dramatic play areas and water or sand tables have vanished from some classrooms , while worksheets and textbooks have appeared .

有些学区的五岁学童甚至开始学习一年级或二年级的课程内容。过去幼儿园里不可或缺的表演玩耍区、沙盘或水盘已经不复存在，取而代之的是练习册和课本。

One creative restaurant in the Southwest China 's city of Chongqing has moved its business from indoors to open water . About fifty tables are placed in shallow water , just under the shadow of trees .

重庆一家餐馆极具创意地将室内用餐变成了室外用餐，在树荫下的浅水中摆了近50张餐桌。

Efficient use of the Yellow River is a central part of efforts to ease water shortages and falling water tables across northern China .

在中国缓解华北缺水和水位不断下降的多项措施中，如何有效利用黄河水资源占其核心地位。