When it comes to the Yellow River, everyone knows that it is the mother river of the mainland, carrying thousands of years of history and culture. However, what you may not know is that the Yellow River once had a "heroic act" in history, and it actually filled up a sea area, which even exceeded the area of the Bohai Sea today. This begs the question: why did the Yellow River fail to fill in the Bohai Sea?
First of all, we need to understand the basin and alluvial role of the Yellow River. The area through which the Yellow River flows is mostly the Loess Plateau, and its water carries a large amount of sediment. When the Yellow River meets the ocean at its estuary, the sediment begins to deposit, gradually forming huge wetlands and new lands. This is why, historically, the Yellow River has had the capacity to fill in a large number of seas.
Over time, though, this has changed. Although the Yellow River is still rich in sediment, changes in the geographical environment and climatic conditions have made it impossible for the Yellow River to continuously transport sediment to the Bohai Sea as it did in the past. In addition, modernization, agricultural development, and over-exploitation of water by human activities have all reduced the amount of water in the Yellow River, and its ability to transport sediment has been greatly reduced.
In addition, the geological structure and marine characteristics of the Bohai Sea itself also provide protection for its "survival". The Bohai Sea is relatively closed, the water depth is shallow, the fluidity is poor, and the sediment deposits are not easy to remove. Even if the Yellow River continues to transport sediment, it will take enough time to fill such a vast sea. However, with the increase in climate change and environmental awareness, we have begun to pay attention to water management, and the flow of sediment in the Yellow River has been restricted.
Finally, the river's ability to self-regulate is also one of the key factors. The Yellow River has undergone many diversions in its history, and changes in its current often affect its ability to impact the sea. Therefore, although the Yellow River once had a glorious "reclamation record", it is difficult to achieve the same scene in modern society due to the interaction of various factors.
In short, the story between the Yellow River and the Bohai Sea is a thought-provoking history. We should cherish this great river of life, understand its special role in the natural world, and at the same time pay attention to the protection of the ecological environment to ensure that we can better coexist with nature in the future.