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1·The groundwater quality in rainy period of 2005 and in drought period of 2006 was evaluated using synthetic evaluation method.

本文采用应用最广泛的综合评价方法，对研究区2005年丰水期和2006年枯水期地下水水质进行现状评价。

2·The forecasting results show that before the year 2000,1997 will be the most severe drought year with not only severe drought damage but also long drought period.

预测结果表明：2000年前，1997年将是黄淮海流域地区最大的干旱年，不仅旱情重而且持续时间长；

3·Based on the recognition of hydrological drought and the runoff forecasting during the drought period, a forecasting model of hydrological drought is established.

通过水文干旱识别和枯水期径流量预估，建立了供水系统水文干旱的预测模型。

4·The joint regulation of increasing discharge from Danjiangkou Reservoir and decreasing discharge from Sanxia Power Station during drought period will reduce the probability of Hanjiang's water bloom.

丹江口水库增加枯水期下泄流量和三峡电站减少枯水期下泄流量的联合调度将减小汉江水华发生的概率。

5·Following this golden period was the 300 year drought called Great drought.

紧随在这个黄金时期之后是300年的大干旱。

6·Using it, he has built up a series of tree-ring chronologies from Thailand and Vietnam that indicate a period of severe drought across mainland South-East Asia in the early 1400s.

使用这个标记，他已经建立了从泰国和越南的一系列树木年轮年表，以表明在十五世纪早期横贯大陆和东南亚的一段严重的干旱期。

7·A drought by definition is a period of unusually dry weather.

干旱的定义是：一段时间内异常的干燥天气。

8·Even a single drought can cut growth potential by 10 percent over an extended period, and historical levels of variability appear to diminish growth potential by over one-third.

即使是一场干旱也有可能使长期增长降低10%，而历史水平的降雨量变化则有可能使增长降低三分之一。

9·In dry climates, the onset of summer drought may put a period to plant activity.

在干燥的气候条件下，夏季干旱的开始就可能使植物丧失活力。

10·It is proved that the drought index exists 5 ~ 8 a period in the most areas, it exists 12-13 a and 15-16 a period in some areas, it also exists 20 a period in specific area.

中国春季干旱指数大多存在5 ~ 8年的短周期年际周期变化，12 ~ 13年、15 ~ 16年的长周年际周期变化存在于部分区域，个别区域还存在20年长周期年际周期变化。