Why is the Xiangjiang River in the north one month earlier than the Xijiang River in the south? Shouldn't we go farther north and later?

Hello, the flood season refers to the period with the highest precipitation and water level in a year, which is generally related to the change of rain belt. With the change of rain belts in various parts of China, the start time of flood season is gradually delayed from south to north, while the length of flood season is gradually shortened from south to north. So generally speaking, the farther north, the later and shorter the flood season.

But this is not an absolute law, and other factors should be considered, such as topography, airflow, land and sea distribution, etc. Rivers such as Pearl River, Qiantang River and Oujiang River have obvious double flood seasons, which are divided into pre-flood season and post-flood season. The first flood season occurs from April to June, which is mainly affected by cold and warm air flow or monsoon. The latter flood season occurred from July to September, mainly affected by tropical weather systems such as typhoons. The two rainy seasons are successive in time, so there are "pre-flood season" and "post-flood season".

Xiangjiang River and Xijiang River belong to the Pearl River system, but their geographical location and topographical features are different. Xiangjiang River originates from Xiangxi Plateau in the northwest of Hunan Province, flows through the central and eastern parts of Hunan Province, and finally flows into Dongting Lake. Xijiang River originates from Yunnan-Guizhou Plateau in western Yunnan Province, flows through Guangxi Zhuang Autonomous Region and western Guangdong Province, and finally flows into the Pearl River Estuary. Because Xiangjiang River is located inland, it is greatly influenced by the intersection of cold and warm air. Xijiang River is located in the coastal area and is greatly influenced by tropical weather system. Therefore, the first flood season of Xiangjiang River is about one month ahead of Xijiang River.

The above are my views and suggestions on why the Xiangjiang River in the north is one month earlier than the Xijiang River in the south. I hope it will help you. If you find it useful, welcome to like it!