Discerning which aquifer of groundwater exploited leads to land subsidence is one of the technical problem in preventing and curing land subsidence.

识别地面沉降究竟是由于抽取何层地下水所引起的，是防治地面沉降实践中迫切需要解决的技术问题之一。

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"We take only what the aquifer can afford," according to Tom Brennan of Poland spring-which says it accounts for just 0.2% of Maine's groundwater use.

根据Poland Spring的汤姆·布伦南的说法，“我们只是利用了地下蓄水层所能提供的，”也就是说只占用了缅因州地下水的0.2%。

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Identification of aquifer parameters plays a primary and pivotal role in ensuring proper management of groundwater resources.

含水层参数的确定，是进行地下水资源科学管理的基础和关键。

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The lack of effective governance is cited as one of the main causes of groundwater depletion, aquifer pollution and possibly inequitable allocation.

UNESCO: World��s groundwater resources are suffering from poor governance, experts say | United Nations Educational, Scientific and Cultural Organization

Since January 2012, UNESCO has been working in the drought-affected countries in the Horn of Africa to identify and to map groundwater resources for an aquifer that will provide at least 200, 000 cubic meters of renewable water every year.

UNESCO: NATURAL SCIENCES