| 英文摘要 |
The project schedule spans from July 8th, 112 to December 31st, 112. The following is a brief description of the revised draft of the interim report on the project's progress up to December 31st, 112.
This project conducted inspections at 7 locations along the Gaoping River from upstream of the Liling Bridge in Dashu District to the estuary in Linyuan District. According to the project contract, dust inspections of the Gaoping River were conducted monthly, with an average of at least 10 days per month. Up to December 31st, 112, a total of 60 inspection days have been completed. The inspections also covered sand and gravel deposition areas and dredging projects along the Gaoping River, with 2 inspection days completed by December 31st, 112.
Additionally, one satellite image was purchased, and aerial photography was conducted twice. Through the acquisition of satellite imagery, the exposed land area in the Gaoping River basin during the non-flood season on November 5th, 112, was determined to be 2,152.8 hectares, a decrease of 132.1 hectares compared to the previous period (April 30th, 112). The reduction was mainly observed in the first zone (downstream of the Ligang Bridge and upstream of the Liling Bridge) and the fourth zone (downstream left bank of the Chaoliao section). Aerial surveys confirmed that exposed land in the first zone was concentrated from upstream of the Liling Bridge to downstream of the Ligang Bridge, covering an area of approximately 167 hectares. In the fourth zone, exposed land was concentrated on the right bank downstream of the Wandan Bridge and the left bank of the Chaoliao section, with approximately 86.5 hectares of exposed land on the left bank of the Chaoliao section. Additionally, one on-site inspection and one coordination meeting were conducted based on the aerial survey results to accurately understand the distribution of exposed land along the Gaoping River. Furthermore, no river dust emission events were recorded from July to December 31st, 112.
The Seventh River Management Office and the Southern Region Water Resources Office utilize the exposed land analysis data provided by this project to implement dust mitigation techniques on the exposed land along the Gaoping River each year. These measures aim to reduce the area of exposed riverbed and mitigate dust emission from the Gaoping River. In the fiscal year 109, a total of 651.2 hectares of improvement techniques were implemented. In the fiscal year 110, a total of 723.2 hectares were executed, including greening vegetation, straw mat cover, dredging projects, and seeding. In the fiscal year 111, improvement techniques such as water coverage, grass cutting and green cover, straw mat cover, permitted planting, destruction of short embankments, and soil improvement were carried out, totaling 1,026.75 hectares. In the fiscal year 112, improvement techniques including water channel construction, straw mat cover, water line installation, seeding for green cover, and dredging projects were implemented, totaling 812.408 hectares.
This year, key areas prone to dust emission were identified through satellite imagery, aerial surveys, and inspections. Corresponding improvement techniques were implemented in these areas in collaboration with river management authorities. These techniques included water coverage (water channels) upstream of the Liling Bridge, water coverage (ponds) and spreading fruit tree wood chips upstream of sediment retention weirs, water coverage (water channels) downstream of the Wandan Bridge, and permitting planting and implementing straw mat cover downstream of the Wandan Weir. Comparing the periods before and after implementation, there was a significant decrease in both the scale and duration of dust emission from riverbank areas during strong southern winds.
Subsequently, the focus for the first quarter of 113 will be discussed through action plan meetings. Additionally, in coordination with cleaning the surrounding environment along the riverbanks, measures were taken to prevent road dust resuspension and mitigate the negative effects of riverbank dust emission. From July to December 31st, 112, a total of 2,975.97 kilometers of cleaning was completed along the Gaoping River coastal roads, and 10,093.08 kilometers of cleaning was completed in urban areas of Kaohsiung City (including roads along the Gaoping River). The total reduction in Total Suspended Particles (TSP) amounted to 77.45 metric tons, and the reduction in PM10 totaled 14.87 metric tons.
|