The plan was executed on May 1, 106, the contract signing date. As of April 30, 2017, the execution time of the project was 365 days. The summary of the work results is as follows:
(一)Rivers and dusts exposed to bare ground and sand and gravel inspection
During the period from May to April of the next year, Hualian River, Liwu River and Xiuguluan River were prone to dusty bare ground inspections. In May, due to the influence of the plum rain season, the river water cover increased, while the bare ground decreased slightly; June~7 In the month, the rainfall area slowed down and the water cover area decreased, resulting in a slight increase in bare ground. The green cover did not change much. On October 13th, it was affected by Typhoon Kanu. Although it was not in the Huadong area, it was surrounded by the northeast monsoon. The co-concomitant effect entrains a large amount of rainfall, causing a large amount of rainwater to wash the riverbed. The water level approaches the bridge. The plants that have been applied for green cover and natural growth in Hualien Creek over the years have been washed away, and in October, they have entered the northeast monsoon period. Strong winds from the front to the south caused high concentrations of river dust; after December, the rainfall gradually slowed down, only occasionally passing through the front, bringing water and moisture, temporarily affecting the water level change in the river, the rest is not much change; in January of the next year in Zhongxingqiao The downstream began the dredging project, the construction of the bridge under the Wanlixi and Mata Anxi Bridge, and the Xiulunxi Riverbed next to the Yuli Station also has a berming project, which led to the 0.5 km river upstream and downstream of the Yuli Bridge. The change of the road thus changes in the appearance of bare ground and water. The overall riverbed change was reduced by 9 hectares in Liwu River, 7.4 hectares in green cover and 16.4 hectares in bare land; 35.5 hectares in Hualian River, 2 hectares in green cover and 59.5 hectares in bare land; 5.35 hectares in Xiugusu River The green cover was reduced by 0.02 hectares and the bare land was reduced by 5.33 hectares. From May to April of the next year, 17 Hualianxi and 1 sandstone industry in Xiuguuxi were inspected. At present, the sandstone industry is in compliance with the standard control measures.
(二)Dust-prone area demarcation
According to the monthly regular check of river basin changes, this year is more obvious in water cover and bare ground. No. 04 Hualian River and Papaya Creek Confluence, the water cover on the southwest side of Hualien Bridge decreased by 23.6%, and the exposed area increased by 23%. Next, the number 17 county road is below 193, 30K, the water level in the main river channel is reduced by 9.6%, and the exposed area is increased by 20.9%. The green cover change is 193, 27.5% below the county road, and 17.7% green on the east bank of the main river. Covered by 14.8% bare ground, numbered 06 County Road below 193, 28K, the main river channel west bank decreased by 16.7% green cover increased by 15.7% bare ground. This year's climate change, the typhoon only in July, the sand and sea otters, landing location for the northeast and southwest, do not directly affect the eastern half, so the typhoon is less affected, but the Kanu typhoon formed in October is accompanied by In the northeasterly winds, a large amount of rainwater is poured into Hualien, causing changes in rivers and rivers, and greening of lower beaches, causing changes in bare land. In addition, No. 14 Fenglin Town Wanlixi Bridge to Jianyu Bridge, No. 15 Fenglin Town and Guangfu Township Boundary River (Matai Anxi), is currently undergoing bridge construction projects, human factors change both rivers and green covers, resulting in In this year's number 14, 15 green cover decreased by 10.8% to 12.5% and the bare ground changed the number 14 decreased by 10.8% and the number 15 increased by 24.7%. In the demarcation of the bare land this year, the number of 05 County Road 193.27.5k, No. 06 County Road 193.28k original moderate level was adjusted to a serious level, the rest of the provisions have not been adjusted.
Areas with mild impact: None. Moderately affected area: bare ground number 13~16. Seriously affected areas: bare ground numbers 01~12, 17~23.
(三)Maintenance and monitoring of river dust warning system
All of them have regular maintenance settings in Hualianxi, Liwuxi and Xiuguluan early warning systems, and fill in maintenance records; automatic monitoring data is output at least one hour per hour. The current monitoring station is 98.68% effective for Liwuxi, Hualienxi 98.45% and Xiugutunxi 97.87%, the current efficiency is maintained above 90%.
(四)Analysis of river hydrology and dust events over the years
Through the hydrological data of the rivers in the past years, it can be seen that during the flood season in Hualien area, when the typhoon is affected from July to September, the increase of river water level and water volume will transport the soil sand of the upstream streams downwards. After the flood season, a large area of bare land will be formed in the lower reaches of the river. When the northeast monsoon comes in October, it will easily aggravate the phenomenon of dust in the exposed rivers. Analysis of the dusty event days over the years, statistics will easily cause the climatic factors of dust, if the humidity is < 75% and the wind speed is > 3m / s, it is easy to cause PM10 The concentration increases.
(五)Site location migration or increase assessment
Through the monitoring data and meteorological analysis over the years, the appropriateness of the location of the existing monitoring stations is assessed. With the historical data and dust weather conditions, when the northeast monsoon season is carried out, the wind direction does affect the location of the station and the neighboring villages, but it is effective and continuous. Monitoring and historical data analysis, it is recommended that the station still maintain the current location, and the accuracy of monitoring data should be prioritized.
(六)Dust warning notification system
The PM10 automatic monitoring station is set up in Hualienxi, Liwuxi and Xiuguuxixi to monitor the variation of the dust concentration in the river. The PM10 of the monitoring station samples up to 100 μg/m3 per hour, that is, the warning notification is sent, if the concentration reaches 600μg/m3 and lasted for more than two hours, immediately start the strain mechanism, and establish the dust warning score sheet, and advance the dust warning report.
(七)Delineation of the influence of river dust in Hualien area (ISCST mode)
Integrate meteorological, topographical, bare ground information and suspended particulate emissions (including the selection of river dust emission factors), and simulate the incremental concentrations of suspended particles TSP, PM10 and PM2.5 in the ISCST empty model, and draw the suspension The concentration curve of the particles is used to grasp the influence range and area of the river dust through the equal concentration map. Mildly affected area: Shun'an Village, Xincheng Township, Liwuxi, Xiulin Village, Xiulin Township; Fengli Village, Shoufeng Township, Hualien River; Changliangli, Taichangli, Guanyinli, Sanminli, Xiugu Tunxi. Moderately affected area: Zhongxincheng Village, Xincheng Town, Liwuxi Town, Chongde Village, Xincheng Township; Huanian River Zhongyue Village, Zhongpinghe Village, Pinghe Village; Daguli, Dongfengli, Yongchangli In the mold. Severely affected areas: Xincheng Village, Xincheng Village, Liwuxi, Fushi Village, Xiulin Township; Guanghua Village, Shangyuemei Village, Shangpinghe Village, Ji'an Township, Hualien River; Zhongchengli, Yuanchengli, Guowu Li, Le Heli.
(八)Manual sampling operations
During the period of good dust in the river (October to April of the next year), a total of five maneuver manual sampling operations (including Liwuxi, Hualianxi and Xiuguluanxi) were planned. At present, 5 points have been executed (Liwuxi and Hualienxi), the first sampling operation of Liwuxi was carried out on October 24, the second sampling operation of Liwuxi was carried out on October 25, and the vertical fog was carried out on October 26. The third sampling operation of the stream, the fourth sampling operation of Hualien Creek on October 30, the fifth sampling operation of Hualien Creek on October 31, and the sixth sampling operation of Xiuguangxi on April 23, 2018.
(九)River dust prevention and control publicity briefing session
The briefing session will mainly educate the public on the protective measures that should be taken when the dust strikes. In order to avoid the danger of dust exposure, the company has completed five annual publicity briefings, with a total of 528 people. After many times, people and students have a certain degree of understanding of the impact of the dust on the river, and clearly understand the cause of the dust is the strong influence of the northeast monsoon.
After the meeting, a questionnaire survey was conducted to show that the public’s satisfaction with the EPA’s control reached more than 80%, indicating that the public must agree with the regulation of the river’s dust, and the other is to effectively suppress the dust. The public understands through the promotion and is effective. And long-term suppression of dust prevention methods, it is recommended to plant green cover on the barebed of the riverbed, followed by water cover for the riverbed. According to the statistical analysis of the satisfaction questionnaire from 2014 years to2017years, the average annual rate is 79%. After years of hard work, the people have gradually recognized the achievements of the Environmental Protection Agency on the control of river dust.
(十)Regional Contact Conference
In the first session, the division of powers and responsibilities was mainly carried out. Liwuxi, Hualienxi and Xiuguuxixi are located within the jurisdiction of the county. Therefore, there is no problem in horizontal linkage. It is mainly for the handover between the northern district and Yilan County. Peace Creek has a clear division of powers and responsibilities. The main early warnings of Hualien County are rivers and rivers, Liwuxi, Hualianxi and Xiuguluoxi. Regarding peace and river control and dust control, the division of powers and responsibilities should be controlled by the relevant units of the First River Bureau and the Yilan Environmental Protection Bureau.
In the second session, the river management unit of the county's jurisdiction, the Water Resources Section and the Ninth River Bureau, were invited to revise the PM10 classification of the air quality AQI issued by the Environmental Protection Agency, and the county's dust warning level was revised. The original warning value was 100 μg/ m3 was repaired at 126 μg/m3 and was in line with the EPA's warning criteria.
(十一)Early warning protection drill
In order to improve the response mechanism of river dust disasters, one dust simulation will be conducted before the flood season every year to simulate the dusting situation in the rivers. Through the live drills of all levels of response units, the notification process and the division of powers and responsibilities of familiar incidents will be strengthened to achieve a dusty day. The effectiveness of the contingency, the day attending the exercise unit for the county's dust-related bureaus at all levels, and the neighboring industrial areas and village leaders to join the exercise drills, strengthen the strain, and this year, in addition to invited Ji'an township heads, parliamentarians, media to attend the ceremony In addition, the EPD's officers and contractors were invited to participate, a total of 164.
(十二)Demonstration observation meeting
In order to showcase the prevention and control system of the river in the past years, the village has conducted a demonstration meeting of bare ground demonstrations in the village of Hualienxi River Basin in the county, so that the public can better understand the efforts of the government departments on the prevention and control of the river dust. The Environmental Protection Agency handles a number of publicity sessions to educate people on self-protection, long-term air monitoring, early warning of dust reports, and river management units to apply various methods in areas such as water curtain sand control, sand trapping, and green. Covering (wolftail, five-section awning and cutting pasture), etc.; a total of 60 questionnaires were distributed, 52 volumes were recovered, and the recovery rate was 87%. The public believed that the dust-proof production was 75% of satisfaction with satisfaction. Satisfaction 21%, average 4%, annual overall satisfaction (very satisfied and satisfied) reached 96%, showing that the public understands the government's efforts to maintain environmental air quality over the years and achieves annual satisfaction with the performance indicators set this year (very satisfied and Satisfied) 80% or more.
(十三)Webpage maintenance update
At present, the 12-step "Hua Lian County River Dust Warning Notification Platform" and the EPD "Hechuan Dust Prevention Promotion Information Network Platform" webpage have been updated and maintained. The updated project is a monthly event information and real-time monitoring of the project monitoring station. Data back-end maintenance and uploading project execution results.
In the period of rising dust in the river (from September to March), the street washing operation can be carried out to reduce the harm of dust to the health of the public during the dusty season, so that the public can better recognize the relevant actions of the competent authorities. The main road washing operations are carried out 2 to 3 times a week in Shoufeng Township and Yuli District. The total length of annual street washing is more than 6,000 kilometers. The new city implemented 1,866km, Shoufeng 1,944km and Yuli 1,743km, as well as assisting the peace area to clean 111km and 0206 earthquake 459km, a total of 6,123 kilometers. According to the EPA's announcement, the PM10 coefficient of the street washing reduction is 0.0026 metric tons/km, and the total annual PM10 reduction is 16 metric tons.
(十五)Purchase satellite imagery before the flood season and take the aerial shot after the flood season
According to the purchase of satellite imagery in July of the year, as the base map for the calculation of the river in this year, through the digitization of the exposed land, the Hualian River and the Xiuguguxi River barely changed before and after the flood season. The Hualian River water cover was reduced by 10.1 hectares from 12.2 hectares. The cover is 113.1 hectares, the green cover is increased by 25 hectares from 16 hectares, the current green cover is 9 hectares, the exposed land is increased by 10.1 hectares from 245.5 hectares, currently 256.1 hectares. The dredging operation has been completed after the flood season, so the area is 0 hectares. The water cover of Gulu River is reduced by 14.6 hectares from 33.2 hectares. The current water cover is 18.6 hectares, the green cover is slightly increased by 0.4 hectares from 5.1 hectares, the current green cover is 5.5 hectares, and the bare land is increased by 14.2 hectares from 83.8 hectares, currently 98 hectares.
(十六)Innovation as a
The CCTV will be set up with the 2017-year forecasting system to assess the prevalence rate of dust in the next 3 days depending on the climatic conditions. Since the automatic monitoring station is limited by space transmission, CCTV changes are mastered by the continuous record of CCTV ( In the case of dust, the scene of dust in the river basin is not only dependent on monitoring equipment, but also provides planners through screen transmission to judge the start-up measures and improve the efficiency of starting the early-warning mechanism.
The river basin is monitored, and the images of the important areas around the area are concentrated by the camera, and the transmission is controlled by the planners to enable the personnel to grasp the situation of the dust scene and the necessary processing strain at the first time through the instant picture of the camera. Measures to achieve immediate and early warning control purposes. Up to now, from the date of completion of the erection, the image determination is a total of 3 times for the river bed dust notification.
(十七)Project completion ratio in the current period: 100%
(十八)The current control ratio of the project: 100%