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。

youdao

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；

youdao

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。

youdao

They perform the Yaokwa ritual every year during the drought period to honour the Yakairiti spirits, thereby ensuring cosmic and social order for the different clans.

UNESCO: Intangible Cultural Heritage

This shrinkage coincides with a period of prolonged drought in eastern Africa, and was probably caused by it.

ECONOMIST: Human evolution: Before the exodus | The

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.

ECONOMIST: Tree rings are laying bare the climatic history of Asia