It is rising by about 10 feet [3 m] a year and could prove disastrous for London’s underground railway system, its miles of underground wiring, and the foundations of many of its buildings. It is estimated that about 50 boreholes will have to be sunk.
اما في القرن الماضي ،‏ عندما كانت المصانع تستخرج ملايين اللترات من المياه ،‏ فقد قدِّر ارتفاع منسوب المياه بـ‍ ٩٣ مترا تحت سطح الارض .‏