Research on ecological restoration assessment and eco-economic development of sea area by introducing the K-means clustering algorithm.

The research uses the K-means clustering algorithm to examine the correlation between ecological restoration assessment, economic development, and investment in sea areas. The study intends to shed light on the dynamics and relationships between these variables and offer insightful information for managing the coastal and marine environments. We have made important discoveries on the effects of ecological restoration and eco-economic development on research investment by thoroughly analyzing data from various indicators, including the ecological index, eco-economic variables, and geographical index. Our findings underscore the significance of protecting marine ecosystems while promoting economic growth by demonstrating the beneficial effects of ecological restoration initiatives on research investment in maritime regions. The report also emphasizes the critical role of eco-economic development in influencing research investment and advancing sustainable practices that balance economic growth and environmental preservation. The results highlight the need for coordinated efforts among local communities, government agencies, academic institutions, business stakeholders, and industry to create comprehensive programs prioritizing ecological restoration, economic development, and research spending. This holistic strategy can support technical advancement, economic diversification, and sustainable development in maritime regions. The study's findings emphasize the importance of coordinating research funding with ecological restoration and eco-economic growth for coastal communities and residents' long-term well-being. Policymakers are urged to prioritize investments in research infrastructure, programs that increase capability, and encouraging regulations that support an environment significant to research and innovation. Stakeholders can use the advantages of research investment, utilize the potential of sea areas, and support the accomplishment of sustainable development goals by implementing these ideas. This study contributes to the existing literature by providing empirical data and insights into the complex relationships between ecological restoration, economic growth, and research expenditures in maritime regions. This paper highlights the study's limitations to encourage further research on new variables and comparisons across various industries and areas. This study provides insights into the importance of incorporating ecological restoration, eco-economic development, and research investment for sustainable coastal and marine management.

Evaluation of the coordination between marine ecological environment protection and marine economic development in China.

Over the years, the development of marine economy has been an important component of coastal cities' total economic growth in China. Whether the coastal cities had paid enough attention to the coordination of marine economic development and ecological environment protection in the process of marine development activities needed to be evaluated accordingly. An index evaluation system for the coordination between marine ecological environment protection and marine economic development in coastal cities of China was established in this work by using the analytic hierarchy process. The statistical analysis results from 2006 to 2018 showed that much more attention had been paid on marine ecological environment protection since the year 2012 in China. The evaluated results showed that among all coastal provinces and cities, Shanghai and Shandong Provinces had the best coordination between marine economic development and marine ecological environment protection in the year 2016. Years of data showed that marine economic development and marine ecological environmental protection complement each other and promote each other. At the same time, the analysis results of this indicator evaluation system showed that marine ecological environment protection in China should further strengthen the protection by preventing and controlling marine pollution and carrying out ecological restoration.

Spatial-temporal distribution of total organic carbon and its transportation in the Jiulong River Estuary.

Spatial and temporal distributions of total organic carbon (TOC) in the Jiulong River Estuary (JRE) were determined using data collected during three cruises in summer 2010, autumn 2010, and spring 2011. The TOC concentration influencing factors were identified, and the export fluxes were calculated. TOC concentration ranges were 0.73-4.17 mg/L in summer, 0.90-5.32 mg/L in autumn, and 1.78-8.03 mg/L in spring, respectively. TOC concentrations of the surface water and nearshore area were higher than those of the bottom water and offshore area, respectively, and the maximum TOC content occurred in the JRE upper reaches. The TOC concentration decreased with increasing salinity and exhibited a significant positive correlation with petroleum and dissolved inorganic nitrogen (DIN), indicating the influence of terrestrial input. A weak relationship between TOC and chlorophyll-a indicated that phytoplankton was not the dominant source of TOC. TOC fluxes discharged into the JRE were 50.39 × 103 t/a in 2010 and 46.08 × 103 t/a in 2011, and those transported into the sea were 38.46 × 103 t/a in 2010 and 33.66 × 103 t/a in 2011, respectively, accounting for approximately 75% of the total estuary fluxes. This study elucidates the biogeochemical processes of estuarine organic carbon and provides a quantitative basis for the land-sea integration of carbon dioxide emission reduction and sink increase projects.

Study on layout optimization of sewage outfalls: a case study of wastewater treatment plants in Xiamen.

In order to protect the offshore environment and strengthen the comprehensive rectification of sewage outfalls, an evaluation method of regional sewage outfalls by combining the marine numerical simulation and comprehensive evaluation technology was constructed, considering the marine environmental capacity and the ecological impact of sewage discharge from outfalls on the marine eco-environment sensitive areas. Then the layout rationality of each outfall was evaluated and the discharge scale was optimized with a case study of existing sewage outfalls in Xiamen. The results show that, the comprehensive evaluation score of Yundang outfall was 3 points in 2025, evaluated as the outfall with irrational layout. In 2035, the comprehensive evaluation scores of Fenglin and Dalipu outfalls were 3 and 2 points respectively, evaluated as the outfall with irrational discharge scale. It is suggested to control the scale of expansion or increase the reclaimed water reuse rate in Jimei and Gaoqi Wastewater Treatment Plants. This method has enriched the evaluation system for layout optimization of sewage outfalls, providing scientific supports for comprehensive improvement of sewage outfalls and marine environmental management.