The biggest concern of pumping out water from this deep is the gradual settling down of the land surface.
从这么深的地方抽水，最大的问题是地表会逐渐下沉。
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。
It has been estimated that an additional one-fourth of the Earth's land surface is threatened by this process.
据估计，地球表面另外四分之一的土地正面临沙漠化威胁。
The deserts, which already occupy approximately a fourth of the Earth's land surface, have in recent decades been increasing at an alarming pace.
沙漠已经占据了大约四分之一的地球表面积，近几十年来还在一直以惊人的速度增加。
Globally, forests now cover about 31% of the Earth's land surface.
就全球而言，目前森林覆盖约占地球陆地面积的31%。
The livestock sector now uses 30 percent of the Earth's land surface.
畜牧业共使用了目前地球陆地表面的30%，大部分被用于永久性牧场；
In both images, white clouds cast their shadows onto the land surface below.
在那两张照片里，白色的云把他们的影子投在下面的地表上。
Last month's global average land surface temperature was the fourth warmest on record.
上个月的全球平均地表气温，在有史以来的热榜上位居第四。
The assessment will cover the whole land surface of the Earth with about 9000 samples.
该评估将覆盖地球的整个地表并提供9000份样本。
Images were taken every eight days to reveal land surface that might otherwise be obscured by cloud.
每隔八天拍一张照，以展示可能被云层遮盖的地表。
Pharand claims three per cent of the planet's land surface is under tarmac - an area the size of India.
他称，3%的地球地表是柏油路面，面积差不多是一个印度那么大。
They may only cover 5 per cent of the world's land surface, but they emit three quarters of its greenhouse gases.
也许城市仅仅覆盖了世界地面的5%，但是，它们排放出四分之三的温室气气体。
A previously published image of land surface temperatures shows extreme heat in the drought region at the same time.
一份之前发布的地表温度图，也显示了同期该干旱地区受到的极端高温。
Inside the saltpan, the land surface is uneven. Areas shaped like sloppy teardrops rise above the surrounding plain.
盐田内部的地表凹凸不平，巨大的泪滴状隆起为周围的平原所环绕。
About 12 percent of Earth's land surface is now used for crops. Some of the consequences are difficult to predict.
地球表面陆地大约12%已经被开发种植农作物，其后果还是很难预测的。
Water on the land surface appears in shades of dull green, and a temporary river runs north-south through the image.
陆地表面的水流呈现暗绿的阴影，一条临时出现的河流自北向南纵贯图片。
Calibration for the soil roughness parameters is very important for land surface parameters retrieval with radiometer.
地表粗糙度的标定对于利用微波辐射计数据反演地表参数而言是十分重要的工作。
Although volcanic soils cover just one percent of the Earth's land surface, they support roughly 10 percent of its population.
虽然火山土只覆盖了地球陆地表面的1%，但是它们供养了近10%的人口。
The plants growing on the land surface can be affected by the occurrence and movement of water and salt in the aeration zone.
包气带水分、盐份的分布和运移对地表植被生长有着重要的影响。
Land leveling is an important measure for improving the efficiency of farm land surface irrigation and saving the resources of water.
平整土地是提高农田灌溉效率，节约水资源的一项重要措施。
The relationships between topographic factors, various land cover types and the land surface temperature were analyzed using GIS spatial analysis tools.
运用GIS空间分析工具，分析了地表温度与地形特征和地表覆盖类型之间的关系。
Some critics argue that the global record of land surface temperature over the 20th century could be to some extent corrupted by heat from towns and other factors.
有批评人士指出，在20世纪，全球地表温度的记录在一定程度上可能被城镇带来的热量以及其他因素侵蚀过。
The new algorithm proposed in this paper will be useful to a certain extent to analyze watershed hydrological processes and quantify the land surface processes.
这种地形指数新算法的提出对于流域水文过程机理分析及陆面过程定量化研究具有一定的现实意义。
Meat and dairy production use 30% of the earth's land surface, 70% of agricultural land and account for 8% of the water humans use, mostly to irrigate feed crops.
肉类和奶制品的生产占用了地球30%的陆地面积，70%的农业用地，使用了8%的人类用水，这些水主要用于饲料作物的灌溉。
To forecast an event like that, scientists need to be able to quantify all the variables involved and also develop a very precise model of the land surface, added Stott.
斯托特接着说，要预报这样的气候事件，科学家需要能够量化它涉及到的所有变量，还要开发非常精确的土地表面模型。
Helping Indigenous Peoples, who number 250 million globally and occupy 22 percent of the Earth's land surface, to better cope with the adverse effects of climate change.
帮助土著人群更有效地应对气候变化造成的负面影响。目前，全球共有2.5亿土著人，他们生活的地区占地球陆地面积的22%。
Then the application and advancement of remote sensing technology in focal global change problems such as land cover, trace gases, wetlands and land surface parameters are reviewed.
然后概述了遥感技术在土地覆盖、痕量气体、湿地以及地表参数反演等全球变化研究热点问题中的应用及进展情况。
Leaf area index (LAI) is not only an important attribute of land surface vegetation system, but also a key parameter for the models of global water balancing and carbon circulation.
叶面积指数LAI不仅是陆表植被系统的一个重要属性，而且是全球水平衡、碳循环等模型中的重要输入参数。
Leaf area index (LAI) is not only an important attribute of land surface vegetation system, but also a key parameter for the models of global water balancing and carbon circulation.
叶面积指数LAI不仅是陆表植被系统的一个重要属性，而且是全球水平衡、碳循环等模型中的重要输入参数。
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