Why is there no water in Wen 'anwa?

There are engineering facilities to control water quantity. According to official website, Hebei Provincial Water Resources Department, Wen 'anwa has Daqing River in the north, Ziya River in the east, Zhulong River and Hutuo River in the southwest. Every time it rains heavily, the flood pours down, and the river channel is narrow, which will inevitably lead to cross-flow and flood. Therefore, the relevant government departments build water conservancy projects to control water quantity, and there will be no water.