| 英文摘要 |
The execution period of this project is from May 18, 2019 to May 17, 2020. All contract goals of work items have been accomplished and the first drafts of midterm report and term report have been submitted by November 17, 2019 and April 27, 2020 respectively. Extracts of the enforcement results of all work items are shown as follows:
During the execution period of this project, three river fugitive dust episodes of Gaoping River occurred on September 20~21, 2019 and February 15 and March 26, 2020. To make sure the dust emission potential areas on riverbed, this project continued to investigate and assess possible dust emission potential areas by episode day analyses, satellite image comparisons and field inspections, and marked out the riverside villages of Ligang Township as high-impact areas of river fugitive dust. This project also offered the Seventh River Management Office related results as reference for selecting the dust control sites. A total of 601.8 hectares of exposed riverbed have been improved in 2019 and reduced about 41.4 tons of PM10 emission per year based on their actual control periods.
To enhance response efficiency of departments and organizations concerned and the public, this project compared weather forecast information to the self-developed Gaoping River Dust early-warning parameters to predict river dust episode event and offered six times of dust early-warning information to the Bureau, and successfully predicted the intermediate river dust episode for Pingtung County on September 21, 2019, and the intermediate river dust episode for Kaohsiung City on February 13, the intermediate river dust episode for Pingtung County on February 15, the river course dust episode for Pingtung County and the intermediate river dust episode for Kaohsiung City on May15, and the intermediate river dust episode for Kaohsiung City on May 16, 2020. For holding the possible major impact areas earlier in future, this project also utilized ISCST3 Dispersion Model to simulate the impact levels and extents of the episodes mentioned above, and the results showed that the levels of PM10 incremental concentration at monitoring stations and dispersion trend of river fugitive dust met the actual situation occurred during episode days. It shows that the simulation results can help us have a better knowledge of the possible impact extents of river fugitive dust events.
This project has finished 3,071.9 kilometers of environmental cleanup in river fugitive dust impact areas during the execution period with a total PM10 emission reduction of about eight tons. In addition, a total length of 32,243.5 kilometers of road washing/cleaning executed by government organizations concerned and related projects has been reached in 2019 with a total PM10 emission reduction of 83.8 tons. According to the results of the public satisfaction survey executed by Nsysu Survey Center, the public of the key townships along the Gaoping River in Pingtung County gave a positive rating of 87.7% for the improvement of road cleaning.
Two training sessions of river dust education for villages along the Gaoping River, three propaganda of river dust education for schools, two liaison meetings for Gaoping River dust control and a river dust pre-notification and self-protection drill have been hold this year. Furthermore, through the questionnaire survey executed by this project, 96% of the respondents gave positive evaluation to Environmental Protection Bureau, Pingtung County Government for its promoting related work regarding river fugitive dust control.
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