As a unique seasonal natural phenomenon along the coastal areas, Salty Tide usually occurs in the dry season or the periodofdrought.
由于咸潮上溯属于沿海地区一种特有的季候性自然现象，多发于枯水季节、干旱时期。
2
A drought by definition is a periodof unusually dry weather.
干旱的定义是：一段时间内异常的干燥天气。
3
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.