英文摘要 |
This project compiles data from various measuring stations (Taitung, Guanshan, Liji, Renai Elementary School, Forest Park) over the years, river characteristics, current land coverage in river areas (or dust prone conditions), etc., and purchases satellite imagery ( 4 pictures), identify the composition of the riverbed in the Beinan River Basin. In 2012, the bare land on the Beinan River bed accounted for about 32% on average, water bodies and water-bearing shoals were about 45%, and vegetation land was about 23%. After water coverage by the Environmental Protection Bureau, the Eighth River Branch and this project, the average bare land in 113 was about Accounting for 22%, water bodies and water-bearing beaches account for about 53%, and vegetation lands account for about 25%, showing that water coverage can effectively reduce the area of exposed land. The team also conducted simulation increments of PM10 concentration and conducted 19 inspections of exposed areas. Combining all the information, the dust-prone area of the Beinan River River is located between the upstream of Liji Bridge and its outlet, the upstream and downstream sections of Baohua Bridge and the upstream and downstream sections of Dianguang Bridge. Under northeasterly, northerly and southerly winds (3m/s), river dust is prone to occur in the above locations. To this end, the work team conducted practical drills from the Taitung Bridge to the seaport area, implemented water covering construction methods, and executed 189 work trips (Type 300 strange hand). The cumulative construction area reached 532.46 hectares, and the water coverage area reached 932 hectares. The TSP was reduced The total amount reached 223.81 metric tons, and the PM10 reduction amount reached 114.94 metric tons.
In order to allow the public and emergency response units to respond in advance, a river dust forecasting mechanism has been established to provide real-time dust forecasts and air quality information for the next 24 and 48 hours through the Dust Cover APP and 9 LED displays (electronic signboards) . In addition, dust control regional liaison meetings are held every quarter, and suspended particulate matter disaster prevention and response units are invited to participate. A total of 111 people attended to understand the division of powers and responsibilities, integrate resources, strengthen the response mechanism of each unit, and smooth discussion and communication channels, and Summarize the effectiveness of various units in preventing dust. Conducted 1 internal training with 21 participants to improve the professional knowledge and concepts of planning staff.
In addition, 6 river dust prevention publicity activities were held to establish self-protection concepts for community residents, school teachers and students, and to promote the central and local prevention efforts; through the publicity activities, straw mats and saplings were used to cover The creative publicity campaign on bare areas was carried out in response to specific holidays such as International Disaster Reduction Day and World Earth Day. Cross-regional joint efforts were made to cover the dust to prevent dust. People from the local community participated together and worked together to cover the exposed areas on the Beinan River bed. The total number of participants reached 618 people, combined with the above publicity activities, the number of questionnaires returned was 462, and the overall activity planning satisfaction reached 99%.
Through the implementation of the above-mentioned work projects, despite the impact of three typhoons in 2012, the Bahe Branch and the Environmental Protection Bureau actively invested in water coverage restoration work to keep the river bed moist. The annual average PM10 concentration in Taitung in 2012 was only 16.6 (μg /m³), which only increased by 0.2 (μg/m³) compared with the 2011 fiscal year (16.4μg/m³). Compared with the 18.27 (μg/m³) in 2010 (2 typhoons), it has decreased by 1.67 (μg/m³), showing The water covering construction method can effectively reduce PM10 concentration. In addition, as of the end of June 2013, the Taitung measuring station has had no dust event days for 32 consecutive months. During the planned period, the dust situation was suppressed for 92 days (235 hours) when dust conditions may occur. The effectiveness of river dust prevention is quite significant.
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