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hydrological
[hahy-druh-lahj-ik-uhl]
Example Sentences
Although the distribution and intensity of the UK's rainfall is shifting, the link between climate change and drought is complex due to hydrological and societal factors.
In meteorological terms it refers to a sustained period of dry weather, and in hydrological terms it is about a lack of water resources.
We tend to have hydrological droughts following the drier periods simply due to the lag between rain falling, and it getting through river systems and into storage such as a reservoir or groundwater aquifer.
For UK scientists the hydrological or water year runs from October to September, which enables it to take into account often higher levels during the winter that recharge systems.
Analysis by BBC Weather shows that since the start of the latest hydrological year in October 2024, and up to the end of June 2025, rainfall is running approximately 20% below average.
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