| 英文摘要 |
Taitung City has been affected by the dust from the Beinan River for many years. Whenever a winter or before a typhoon hits, it is often affected by the strong northeast monsoon or the peripheral circulation before the typhoon hits, causing serious "wind flying sand" disasters. The dust event in 1998 The maximum concentration of PM10 reaches 2,000 (μg/m³) per day, and the air quality is very poor, which has a considerable impact on the traffic safety and quality of life of residents in Taitung City. Therefore, the Taitung County Environmental Protection Bureau has proposed this in 100 years. The "Peinan Stream Dust Prevention and Improvement Project" (referred to as this project) aims to establish mechanisms such as early warning, notification, publicity, and water coverage exercises for the Beinan River wind-sand dust through the plan, so that the The people who raised the dust from the sands of the Beinan River were able to take precautions before the dust came.
This project collects data from various measuring stations (Taitung, Guanshan, Liji, Ren'ai Elementary School, Forest Park and five dimensional sensors) over the years, river characteristics, current land cover status in river areas (or prone dust occurrence), etc. , Purchase satellite image data (1 per month, 12 in total) to identify the composition of the riverbed of the Beinan River Basin. In June 110, the exposed area of the riverbed of the Beinan River accounted for more than 22%, followed by about 38% of the water-bearing beach. , Vegetation area is about 24%, water body is about 16%, and PM10 concentration simulation increase is carried out, 52 exposed area inspections are performed, and all information is combined to plan the area where the dust is prone to the Beinan River and the upstream of Liji Bridge to the sea mouth and Bao The upstream and downstream sections of the Hua Bridge and the upstream and downstream sections of the Dianguang Bridge are prone to river dust under the northeast, north and south winds (3m/s). For this reason, during the plan period, the water covering construction method was carried out to the Taitung Bridge to the estuary area of the sea. The cumulative area of the construction reached 386.89 hectares, and the water covered area reached 1,044 hectares. During the northeast monsoon season, it is aimed at susceptible to the influence of river dust. The area carried out 94 vehicles of road environmental clean-up operations, the length of street washing reached 7,278 kilometers, the total reduction of TSP reached 237.40 metric tons, and the reduction of PM10 reached 87.38 metric tons.
In addition, in order to allow the public and emergency response units to respond in advance, a river dust forecasting mechanism has been established, through the dust cover APP and 10 LED displays (electronic signage) to provide the next 24, 48 hours of dust forecast and air quality real-time information, and 3 internal training sessions, 2 sessions of experts and scholars, and 2 sessions of the river dust patrol team were organized, with a total of 113 people participating in order to improve the professional knowledge and concepts of responders. The dust prevention and control area liaison meeting is held every quarter, and a total of 4 sessions are held, inviting suspended particulate matter disaster prevention and rescue response units to participate in order to understand the division of powers and responsibilities, integrate resources, strengthen the response mechanism of each unit, smooth discussion and communication channels, and organize all The effectiveness of the unit’s prevention and control of dust. The Eight Rivers Bureau has implemented 809 hectares of water in 109 years and 637 hectares from 110 to July. The Forestry Department of the county government carried out a green cover of 12 hectares and a mat cover of 4 hectares. During the low water period from January to May, 110, through the regional liaison meeting, the Taitung Management Office of the Agricultural and Water Resources Department of the Executive Yuan was coordinated to provide irrigation water daily and The night zoning method is used by farmers during the day, and diverted to the wet and bare Beinan Creek at night.
During the plan period, we will organize 10 publicity activities on the prevention of dust in rivers and rivers. Through the publicity activities, we will establish the concept of self-protection of community people and school students and teachers, promote the efforts of the central and local authorities, and creatively promote through VR real-life short films. Bringing more diversified publicity methods, instead of going to the Beinanxi site by short films, it is like visiting the scene in person. With VR virtual reality glasses, it can deepen the people’s experience. The total number of participants reached 876, and the above publicity activities were integrated. The number of questionnaires returned was 859, and the overall activity planning satisfaction reached 93.36%.
Through the implementation of the above-mentioned work items, in the 109th year and due to the reduction of the impact of the typhoon, the Eight Rivers Bureau and the Environmental Protection Bureau continued to implement the water covering method to keep the river bed continuously moist, even if the wind speed reached 3 during the noon period from September to November 12 to 15 (M/s) and above, under the conditions of northerly and northeasterly winds, there have been no river dust incidents in Taitung and Guanshan so far. In 109, the PM10 concentration in Taitung was only 17 (μg/m³), from 110 to 6 The average monthly PM10 concentration is 20 (μg/m³), which is the lowest in the country. By the end of July 110, Taitung City had no dust incidents for 23 consecutive months, and the effect of preventing dust from rivers and rivers was quite significant.
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