111

4,869 千元

地方政府執行空氣污染防制工作

2022/07/06

2023/07/05

陳昭忞

高雄市政府環境保護局

董婷鈞

昱山環境技術服務顧問有限公司

大氣空氣

空氣品質，河川揚塵，裸露地

Air quality, Rivers dust, barren land

邱至緯

07-3230639#32

ericchiu@wecc.com.tw

本計畫為跨年度之計畫，計畫期程為111年7月6日至112年7月5日，以下就現階段計畫執行至112年6月30日之結案報告成果簡述說明： 本計畫於高屏溪沿岸之大樹區里嶺大橋上游至林園區出海口7處進行巡查點位，依計畫契約內容，於每個月執行高屏溪河川揚塵巡查，平均每月至少應達10天次，統計計畫目前執行至112年6月30日共完成120天次巡查，並不定期巡查及記錄高屏溪沿岸砂石堆置場，巡查至112年6月30日共完成4天次。後續購買衛星圖資2幅與執行航空照片拍攝4次，透過衛星圖資購買掌握高屏溪流域於112年4月30日非汛期裸露地面積共計2,284.9公頃相較前期(111年11月26日)減少147.6公頃，且主要分布於第一區(斜張橋河段周邊)與第二區(高屏疏濬工程河段)；並且藉由空拍作業確認第一區裸露地於斜張橋下游河道左岸處，因疏濬作業執行有明顯增長，於揚塵好發區裸露地約占43公頃，而第二區裸露地則主要集中於高屏疏濬區域河道中央與左岸處，但南水局已針對疏濬工程周邊河段施作水覆蓋工法(水塘)52公頃以抑制裸露地面積增長，同時根據衛星圖資與空拍結果辦理2場次高屏溪裸露地現勘作業與2場次聯繫會議，確實掌握高屏溪沿岸裸露地實地分布情況。另統計111年7月~112年6月發生1天次河川揚塵事件。 第七河川局與南區水資源局也依據本計畫所提供裸露地分析資料，每年於高屏溪裸露地上施作揚塵改善工法，減少河床裸露地面積，降低高屏溪河川揚塵現象，於109年度共計施作改善相關工法，共計651.2公頃；110年度統計共施作723.2公頃，包含綠化植生、稻草蓆覆蓋、疏濬工程以及撒草籽等；111年度，施作水覆蓋、割草綠覆蓋、稻草蓆覆蓋、許可種植、短土堤破壞風場與改良土質等，共計完成1,026.75公頃；112年1~6月，施作引水渠道、稻草蓆覆蓋、架設水線、撒草籽綠覆蓋、疏濬工程等，共計完成704.408公頃，本年度透過衛星圖資、空拍與巡查選定重點揚塵好發區域並與河川管理單位共同針對這些區域執行相對應改善工法，包含:里嶺大橋上游河段執行水覆蓋(引水渠道)、攔河堰上游執行水覆蓋(水塘)與果樹木屑鋪設、萬大橋下游執行水覆蓋(引水渠道)、萬丹堰下游開放許可種植與執行稻草蓆敷蓋工法，對比執行前遇強南風之時段，河川灘地產生揚塵規模與時長皆有顯著下降趨勢，後續將透過行動方案會議研討下階段施作重點。另配合沿岸周邊環境清理以防制道路揚塵捲揚以及防範河川揚塵造成的負面效應，本計畫於111年7月~112年6月共完成沿岸道路環境清理1,545.65公里與沿岸疏濬道路洗掃認養21,931公里，TSP削減量共計達323.98公噸，PM10削減量共計達61.04公噸。 本計畫於111年度更著重於推動及改善部分，體認應從教育做起，其宣導對象共分為二部份如下所示： (1) 第一部分為宣導對象為高屏溪沿岸國中小學教師及學童，對於高屏溪沿岸受揚塵影響較為嚴重的學校，截至112年6月30日，本計畫選定美濃區美濃國小與大寮區潮寮國小，共計辦理2場次宣導，參與人數約567人。 (2) 第二部分為高屏溪沿岸之區里，規劃選定高屏溪沿岸發生河川揚塵事件日易受到影響的區里辦理2場次區里揚塵防護宣導說明會，截至112年6月30日共辦理2場次，選定美濃區與大樹區，參與人數約達447人次。 本計畫已依規劃期程，執行各項活動之辦理並確實完成宣導與揚塵防制之目標，除提升民眾對於揚塵事件基本防護觀念外，同時降低河川揚塵對於周邊區里之影響。

空氣品質，河川揚塵，裸露地

111年度河川揚塵計畫結案報告-正式報告F.pdf

26MB

2023/12/6 上午 12:00:00

The project has been completed from 6th July, 2022 to 5th July, 2023. The following description： This project, which is choosing seven different inspection areas of the Gaoping River from the upper reaches of Liling Bridge at Dashu to the estuary at Lin-Yuan. According to the content of the project and contract, carry out the dust inspection of the Gaoping River every month. On average, there should be at least 10 days a month. The statistical project is currently implemented in June 30, 2023 and a total of 120 inspections have been completed. At the same time, it inspected and recorded the gravel storage sites along the Gaoping River from time to time. It inspected 4 times until the end of June, purchased 2 satellite images and executed 4 aerial photographs. Through satellite imagery data acquisition, the bare land area of the Gaoping River Basin on April 30, 2023 (non-flood season) was a total of 2,284.9 hectares. This represents a decrease of 147.6 hectares compared to the previous period (November 26, 2022), with the main reduction occurring in the first zone (surrounding the Xiezhang Bridge section) and the second zone (Gaoping Dredging Project section).Furthermore, aerial operations confirmed that the bare land in the first zone is situated on the left bank of the downstream river channel of the Xiezhang Bridge. The main reason for this is the significant increase in the duration of dredging operations in this area, resulting in the emergence of bard land covering approximately 43 hectares. As for the second zone, the exposed land is primarily concentrated in the central and left bank areas of the Gaoping Dredging Project section.In addition, in view of this situation, the Southern Water Bureau has taken measures to implement water coverage techniques (ponds) in the vicinity of the dredging project, covering an area of 52 hectares. This is done to suppress the growth of bare land area.Simultaneously, based on satellite imagery and aerial survey results, 2 field inspections of the bare land along the Gaoping River were conducted, along with 2 coordination meetings. This was done to gain a comprehensive understanding of the actual distribution of bare land along the Gaoping River's banks. Additionally, there was 1 river dust incident in Kaohsiung City from July 2022 to June 2023. The 7th River Management Bureau and the Southern Region Water Resources Bureau also utilize the bare land analysis data provided by this project. Each year, they implement dust mitigation techniques on the bare land along the Gaoping River to reduce the area of bare riverbed and mitigate the phenomenon of dust emission in the Gaoping River watershed.In the subsequent years, the two bureaus completed various improvement techniques with the following areas covered: In the year 2020, a total of 651.2 hectares of improvement techniques were implemented. In the year 2021, a total of 723.2 hectares of improvement techniques were executed. In the year 2022, a total of 1,026.75 hectares of improvement techniques were carried out. In the period from January to June of the year 2023, a total of 704.408 hectares of improvement techniques were implemented. The implemented improvement techniques include measures such as constructing water channels, covering with straw mats, setting up water lines, sowing grass seeds for green cover, and conducting dredging projects. This year, the current project has selected key areas prone to dust emission through satellite imagery, aerial surveys, and inspections. Collaborating with river management authorities, corresponding improvement techniques have been implemented in these areas. These techniques include: implementing water coverage (water channels) upstream of the Liling Bridge, employing water coverage (ponds) and spreading fruit tree wood chips upstream of sediment retention weirs, implementing water coverage (water channels) downstream of the Wandan Bridge, allowing planting and implementing straw mat cover downstream of the Wandan Weir. In comparison to periods before these measures were taken, there has been a significant reduction in both the scale and duration of dust emission from the riverbank during strong southern winds. In the future, this project will discuss the focal points of the upcoming phase through action plan meetings. Additionally, in conjunction with cleaning the surrounding environment along the riverbanks, efforts will be made to prevent both road dust resuspension and negative effects arising from riverbank dust emission. According to statistics, from July of the 2022 to June of the 2023, this project has successfully completed the cleaning of approximately 1,545.65 kilometers of coastal roads and recognized the washing and sweeping maintenance of 21,931 kilometers of access roads along the banks. The total reduction in Total Suspended Particles (TSP) amounts to 323.98 metric tons, with a corresponding reduction in PM10 levels totaling 61.04 metric tons. In 2022, this project will focus more on the promotion and improvement part, and realizes that the action should start with education. The promotion targets are divided into two parts as follows. (1) The first phase of the project targets teachers and students from junior high and elementary schools along the Gaoping River. It particularly focuses on schools situated along the Gaoping River that are more severely impacted by riverbank dust emissions. Up until June 30th of the year 2023, a total of 2 awareness events have been conducted at Meinong Elementary School in Meinong District and Chiaoliao Elementary School in Daliao District. Approximately 567 participants in attendance. (2) The second phase of the project focuses on townships and neighborhoods along the Gaoping River. The plan involves selecting areas that are particularly susceptible to riverbank dust emissions for conducting 2 dust protection awareness workshops. Up until June 30th of the year 2023, a total of 2 workshops have been organized in Meinong District and Dashu District, with approximately 447 participants in attendance. The project has implemented various activities according to the planned schedule and has indeed completed the goals of publicity and dust prevention. In addition to enhancing the public's basic protection concept for dust incidents, it also reduces the impact of river dust on surrounding areas.

Air quality, Rivers dust, barren land