The Belt and Road global navigation satellite system(B&R GNSS)network is the first large-scale deployment of Chinese GNSS equipment in a seismic system.Prior to this,there have been few systematic assessments of t...The Belt and Road global navigation satellite system(B&R GNSS)network is the first large-scale deployment of Chinese GNSS equipment in a seismic system.Prior to this,there have been few systematic assessments of the data quality of Chinese GNSS equipment.In this study,data from four representative GNSS sites in different regions of China were analyzed using the G-Nut/Anubis software package.Four main indicators(data integrity rate,data validity ratio,multi-path error,and cycle slip ratio)used to systematically analyze data quality,while evaluating the seismic monitoring capabilities of the network based on earthquake magnitudes estimated from high-frequency GNSS data are evaluated by estimating magnitude based on highfrequency GNSS data.The results indicate that the quality of the data produced by the three types of Chinese receivers used in the network meets the needs of earthquake monitoring and the new seismic industry standards,which provide a reference for the selection of equipment for future new projects.After the B&R GNSS network was established,the seismic monitoring capability for earthquakes with magnitudes greater than M_(W)6.5 in most parts of the Sichuan-Yunnan region improved by approximately 20%.In key areas such as the Sichuan-Yunnan Rhomboid Block,the monitoring capability increased by more than 25%,which has greatly improved the effectiveness of regional comprehensive earthquake management.展开更多
Based on the current situation of marine disaster prevention and mitigation in Caofeidian district, this paper analyzes and summarizes the situation that the information sharing mechanism of marine disaster prevention...Based on the current situation of marine disaster prevention and mitigation in Caofeidian district, this paper analyzes and summarizes the situation that the information sharing mechanism of marine disaster prevention and mitigation needs to be improved. The results of marine disaster risk investigation and hidden danger investigation have not been effectively applied, and the technical force of disaster prevention and mitigation at the grass-roots level needs to be strengthened, and the level of monitoring, early warning and forecasting needs to be improved, and the emergency plan of marine disaster needs to be revised. This paper puts forward eight countermeasures and suggestions, namely, strengthening the marine basic research work in Caofeidian area, strengthening the scientific spatial planning with Lu Dinghais concept, perfecting Caofeidian areas engineering disaster prevention system, improving Caofeidian areas marine disaster monitoring and early warning ability, strengthening the marine disaster emergency organization and guarantee system, improving the public service and information level of marine disaster prevention and mitigation, strengthening the team building of marine disaster prevention and mitigation institutions, and strengthening the publicity, education and training of marine disaster prevention and mitigation, which will provide a basis for effective marine disaster prevention and emergency management in Caofeidian area and gradually improve its marine disaster prevention and mitigation ability.展开更多
基金supported by grants from the National Natural Science Foundation of China(No.42004010)the B&R Seismic Monitoring Network Project of the China Earthquake Networks Center(No.5007).
文摘The Belt and Road global navigation satellite system(B&R GNSS)network is the first large-scale deployment of Chinese GNSS equipment in a seismic system.Prior to this,there have been few systematic assessments of the data quality of Chinese GNSS equipment.In this study,data from four representative GNSS sites in different regions of China were analyzed using the G-Nut/Anubis software package.Four main indicators(data integrity rate,data validity ratio,multi-path error,and cycle slip ratio)used to systematically analyze data quality,while evaluating the seismic monitoring capabilities of the network based on earthquake magnitudes estimated from high-frequency GNSS data are evaluated by estimating magnitude based on highfrequency GNSS data.The results indicate that the quality of the data produced by the three types of Chinese receivers used in the network meets the needs of earthquake monitoring and the new seismic industry standards,which provide a reference for the selection of equipment for future new projects.After the B&R GNSS network was established,the seismic monitoring capability for earthquakes with magnitudes greater than M_(W)6.5 in most parts of the Sichuan-Yunnan region improved by approximately 20%.In key areas such as the Sichuan-Yunnan Rhomboid Block,the monitoring capability increased by more than 25%,which has greatly improved the effectiveness of regional comprehensive earthquake management.
文摘Based on the current situation of marine disaster prevention and mitigation in Caofeidian district, this paper analyzes and summarizes the situation that the information sharing mechanism of marine disaster prevention and mitigation needs to be improved. The results of marine disaster risk investigation and hidden danger investigation have not been effectively applied, and the technical force of disaster prevention and mitigation at the grass-roots level needs to be strengthened, and the level of monitoring, early warning and forecasting needs to be improved, and the emergency plan of marine disaster needs to be revised. This paper puts forward eight countermeasures and suggestions, namely, strengthening the marine basic research work in Caofeidian area, strengthening the scientific spatial planning with Lu Dinghais concept, perfecting Caofeidian areas engineering disaster prevention system, improving Caofeidian areas marine disaster monitoring and early warning ability, strengthening the marine disaster emergency organization and guarantee system, improving the public service and information level of marine disaster prevention and mitigation, strengthening the team building of marine disaster prevention and mitigation institutions, and strengthening the publicity, education and training of marine disaster prevention and mitigation, which will provide a basis for effective marine disaster prevention and emergency management in Caofeidian area and gradually improve its marine disaster prevention and mitigation ability.
