# Study of the Dynamic Adaptive Calculation Method for River Water Environmental Capacity
## 5 Conclusions
The larger the design flow, the greater the degradation coefficient, and the greater the difference in water quality targets between adjacent water functional areas. Additionally, the river in the wet season tends to have a larger WEC. Managers can apply different restrictions on WEC depending on different water periods, functional areas, and water volumes. When WEC is large, it discharges more pollutants, whereas when the WEC is small, it is strictly controlled. Dynamic management can make better use of the resource value of WEC. 2. This method enables the dynamic adaptive calculation of WEC. The dynamic adaptive simulation system based on this method can perform WEC calculations across various spatial-temporal scales, using different calculation methods, with different design frequencies, and under various parameter combinations. Through personalized customization, users can choose the WEC calculation scheme that best suits their needs. 3. This method improves the adaptability of WEC calculation results. The WEC, under this method, varies in response to changes in variable factors such as spatial-temporal scale, design frequencies, and calculation models. The variable interval is used to describe the calculation results of WEC, which can cope with the complex and changeable environment and demand. 4. The dynamic adaptive computing simulation system under this method makes the calculation process of WEC visualized, componentized, and dynamic, which makes the calculation results more reasonable and practical. According to the actual needs of users, the existing WEC calculation model is encapsulated into standardized components and added to the component library. It can be replaced, integrated, and directly extracted for use. It does not need to rewrite the code, which shortens the system development cycle and improves the system development efficiency. The dynamic adaptive calculation method for river WEC proposed in this paper promotes innovation in WEC calculation methodologies and theories, improves the scientific nature of water environment management, the accuracy of environmental management decision-making, and promotes the implementation of water environment planning and total pollutant control. With the aggravation of global climate change, future research should focus on the impact mechanism of climate change on WEC, explore dynamic WEC calculation methods to adapt to climate change, and provide technical support for addressing the challenges posed by climate change. Conceptualization, Y.G. ; methodology, Y.G. and N.W. ; data analysis, F.G. and Y.G. ; writing--original draft preparation, Y.G. and G.Z. ; writing--review and editing, J.X. and J.L. ; supervision, N.W. All authors have read and agreed to the published version of the manuscript. This research was supported by the Key Scientific Research Program of Education Department of Shaanxi Provincial Government (Grant No. 22 JT029), the Science and Technology Program of Shaanxi Province (Grant No. 2021 slkj-5), and the Program of Powerchina Northwest Engineering Corporation Limited (Grant No. XBY-ZDKJ-2022-5). Not applicable. The authors confirm that the data supporting the findings of this study are available within this article. **Acknowledgments:** The authors are grateful to the editors and the anonymous reviewers for their insightful comments and suggestions. **Conflicts of Interest:** The authors declare no conflicts of interest.