The study looked at how restoring the flood lands and banks of the Zhuanhe River in Beijing affected water quality. Water samples were collected and analyzed for nutrients and dissolved oxygen. Results showed that the river's nutrient levels varied with the seasons and were influenced by factors like rainfall and plant growth. To improve water quality, reducing ammonia and nitrate levels in certain seasons is important. More plants in the river led to lower nutrient levels and higher oxygen levels. Different types of plants also affected nutrient concentrations. Overall, the curved river bank helped increase oxygen levels and decrease nutrient levels to some extent.