| 英文摘要 |
River Dust Warning and Notification
In November 2023 and July 2024, UAV imagery was used to capture exposed land in the Wu River and Zhuoshui River basins. Satellite images purchased in October and July 2023 helped identify exposed areas. Aerial surveys and inspections were carried out to map regions at high risk of river dust and assess its impact. During the project, 213 inspections were conducted along the riverbanks, along with 2 air quality response inspections and 52 road surveys. Monitoring cameras were installed at key locations for real-time dust monitoring (336 days). Satellite analysis from July 2024 showed 395.2 hectares of exposed land in the Wu River basin (4.7% increase) and 731.8 hectares in the Zhuoshui River basin (3.1% increase). These results provided crucial data for dust control measures, supporting the Ministry of Economic Affairs' river divisions.
River Dust Environmental Cleaning and Street Washing
Street washing operations were conducted in dust-affected areas, covering 6,031 kilometers. Based on EPA reduction factors, this action reduced TSP by 83.23 tons, PM10 by 15.68 tons, and PM2.5 by 3.66 tons. An additional 1,718.1 kilometers were cleaned as part of air quality emergency responses, reducing TSP by 23.71 tons, PM10 by 4.47 tons, and PM2.5 by 1.04 tons. Weekly inspections were done to ensure compliance with standards, with 48 inspections completed. Water quality tests for turbidity, dissolved oxygen (DO), and pH were also conducted, with all results meeting standards.
Dust Emergency Response and Prevention
In coordination with the Executive Yuan’s dust control plan, emergency measures were taken based on weather forecasts from the Ministry of Environment. Nine applications of Xianxian gel were sprayed on 113.64 hectares in critical areas, reducing TSP by 40.23 tons and PM10 by 30.17 tons. An IoT system was also deployed to automatically spray mist when PM10 levels reached 126 µg/m³, helping reduce airborne dust. The system was installed on May 13, 2024.
Agricultural Material or Other Covering Work
Agricultural materials were deployed on 2.551 hectares of exposed land near the high-speed rail bridge and power tower in Zhuo Township. A total of 505.34 tons of materials were used, reducing TSP by 0.9 tons and PM10 by 0.45 tons.
Regional Coordination Meetings
Two river dust prevention coordination meetings were held: one on December 4, 2023, and the second on August 26, 2024, each with 21 participants. These meetings facilitated discussions on dust control progress and the sharing of effective prevention methods.
River Dust Emergency Response and Public Outreach
(1) To improve response efficiency, an emergency drill was held on September 26, 2023, at Yangxian Dike and Zhutang Township, attended by 52 participants.
(2) Over 300 promotional materials were distributed. In collaboration with the "Yuanlin Lion Cup Parent-Child Run," an outreach event was held on October 29, 2023, at Yuanlin Park, reaching 725 people. Another outreach was held on November 11, 2023, at Ershui Township's elementary school as part of a disaster prevention event.
(3) A demonstration meeting on exposed land improvement methods was held from May 16–17, 2024, in the Zhuoshui River basin, with 65 attendees, including local residents and experts, providing an opportunity for sharing practices.
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