Spatial Distribution of Precipitation in Huang-Huai-Hai River Basin between 1961 to 2016, China.

It can be seen here that the precipitation of Huang-huai-hai River Basin shows a decreasing trend on the whole, which is about −0.71 mm/annually, as seen in Figure 3 .

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It can be seen that the intensity of light rain and mild rain has an increasing trend; the intensity of heavy rain and very heavy rain has no significant changing trend; the intensity of extreme rain has a decreasing trend.

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