并研究了仅由均值变化引起的这两个流域丰水、平水及枯水年出现的概率变化。
The probability of annual runoff for high, normal, and low flow years due to the change of mean annual runoff was studied.
为了寻找黄河口河海划界的科学依据，对影响黄河口河海划界的各种水文、地质、生物、物理、化学等要素进行了丰、平、枯水期的现场测定和室内分析。
In order to find a scientific basis for the delimitation of the boundary line between sea and land in the Yellow River Estuary, the factors of hydrology, geology, biology, physics, chemistry, etc.
丰水期浮游植物多样性指数大于平水期。
Diversity index of phytoplankton in flood period is higher than that in dry period.
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