It's a combination boost of changes in ocean circulation, land ice dynamic and land subsidence caused by human activity.

这是人类活动引起的海、陆冰动力和地面沉降变化的综合结果。

On top of that, land subsidence had made matters worse.

最重要的是，地面下沉使事情变得更糟。

Land subsidence has been aggravated by over-pumping of underground water and the construction of thousands of high-rise buildings.

过抽取地下水和建造数以千计的高层建筑加剧了地面沉降。

As we know, the foundation beneath the building is quite deep, ranging from 20-30 meters, its subsidence rate is much lower than the ground.

我们知道，楼房底部的地基比较深，有20或30米，楼房的下沉速比地面慢很多。

So, naturally, their first calendar was divided up into three seasons, each based on the river ’s changes: inundation, subsidence and harvest.

因此，很自然地，他们的第一个日历被分为三个季节，每个季节基于河的变化：洪水、沉降和收获。

This has decreased ten fold and a new analysis based on Japanese satellite observations of ground subsidence suggest a further ten fold decrease can by expected by 2017.

目前污泥渗出量已经减少了10倍，根据日本地表下沉卫星监控进行的分析，预期在2017年污泥渗出量将再减少10倍。

I am convinced that nearly all our ancient formations, which are throughout the greater part of their thickness rich in fossils, have thus been formed during subsidence.

我相信几乎所有我们古老的地层， 它们的大部分富含化石， 是在下沉过程中形成的。

But this same movement of subsidence will tend to submerge the area whence the sediment is derived, and thus diminish the supply, whilst the downward movement continues.

但同样的下沉运动将倾向于淹没沉积物的来源区域，从而减少供应， 同时继续向下运动。

But now every sound ceased suddenly, with the subsidence of Mr. Walters' voice, and the conclusion of the speech was received with a burst of silent gratitude.

但是现在所有的声音突然停止了，随着沃尔特斯先生声音的消退，演讲的结束引起了一阵沉默的感激之情。

And afterwards during the season of subsidence, the water would subside, or recede, revealing a new layer of fertile black silt and allowing for the planting of various crops.

之后在下沉季节， 水会消退或退去， 露出一层新的肥沃的黑色淤泥， 并允许种植各种作物。

During the periods of subsidence, there would probably be much extinction of life; during the periods of elevation, there would be much variation, but the geological record would then be less perfect.

在下沉期间， 可能会有很多生命灭绝；在海拔升高的时期， 会有很大的变化， 但地质记录会不那么完美。

A city in West Africa, for example, had similar challenges but compounded with very dense populations along the coast, severe land subsidence and drainage challenges that were exacerbated by poor solid waste management in some parts of the city.

例如，西非的一座城市面临着类似的挑战， 但沿海地区人非常稠密，严重的地面沉降和排水挑战加剧了城市某些地区固体废物管理不善的问题。