The large-scale promotion of "sponge city" planning and design in China has continuously im- proved the urban "tactical planning"of water ecolog- ical environment protection and water resource re- covery on a certain basis, improving urban waterlog ging, improving urban public greening water effi- ciency, and reducing water consumption. This article analyzes the trend of the "sponge"monitoring databefore and after the construction of the landscape belt of Yantai Riverside Park and compares the cleanliness of the water before and after the con-struction, the volume of water recovery, the water source protection degree coefficient, and the sponge gain factor. The research results show that for the volume of water recovered, the water volume in 2014 was 145656m3. After the sponge city design and planning, the water volume was 209034m in 2015, 256787m3 in 2016, 304516m in 2017, 356412m3 in 2018, and 428970m3 in 2019. In 2014. for the water source protection degree coefficient the value was 0.188 in 2014, 0.245 in 2015, 0.567 in 2016, 0.675 in 2017, 0.712 in 2018, and 0.869 in 2019. For water cleanliness, it was 570TDS in 2014358TDS in 2015, 220TDS in 2016, 160TDS in 2017, 110TDS in 2018. and 90TDS in 2019. The construc- tion of "sponge city"needs to control the relationship. between natural conditions and living areas, public areas, commercial areas, and urban areas, and ration- ally and effectively plan the landscape design of riv- erside parks or public green spaces and integrate with the development of the sponge city. Giving fullplay to the advantages of natural space and protect- ing the urban ecological environment is the theme and urgent need of the current "sponge city"devel-opment in China. We need to insist on strengthening the harmonious symbiotic relationship with nature as the mainstay and grasp the important direction of ecological civilization.
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