This plan was implemented on October 25, 109. As of October 24, 110, the plan has been implemented for a total of 365 days. The summary of the work results is as follows: Inventory of exposed areas prone to dust in rivers Routine inspections are carried out once a month. Currently 12 times (November 109~October 110) are carried out. Hualien Creek, Liwu Creek and Xiuguluan Creek are prone to dust and exposed areas along the Hualien Creek basin. There are 17 sites, 2 sites in the Liwu River Basin, 4 sites in the Xiuguluan River Basin, 23 sites in total. According to statistics, there are 648.4 hectares of bare land, 227.8 hectares of green cover, and 543.7 hectares of water cover, compared with the same period last year (October ) Reduce by 21.9 hectares, fill in the inspection record form every month and explain the changes in the river bed。 Sand and gravel industry inspectors routinely inspect Hualien Creek and Xiukuluan Creek along the sand and gravel industries once a month. There are 14 companies in the Hualien River Basin and 4 companies in the Xiuguluan River Basin for a total of 18 times. At present, a total of 11 inspections are carried out. (During the period from November 109 to October 110), 216 inspections of sand and gravel yards were completed, and all businesses regularly performed water spraying, maintained normal operation of car washing facilities, and cleaned entrances and exits. Maintenance of dust early warning system This project is based on the monitoring systems of Liwu River, Hualien River and Xiuguluan River, and monthly inspections and maintenance of related equipment are carried out to ensure normal operation of the equipment. The maintenance record sheet will be sent to the bureau for reference along with the monthly work report on the 10th. PM10 automatic monitoring The 24-hour monitoring of suspended particles is from the completion of the contract to the end of the contract, and the monitoring data output is at least one data per hour. After deducting factors such as equipment maintenance and network abnormality, the data efficiency during the monitoring period is at least 90%, and the plan is implemented During the period from November 109 to October 24, 110, the effective monitoring hourly value of the Xincheng station was 8,846 hours, and the effective rate was 99.1%; the effective monitoring hourly value of the Shoufeng station was 8,834 hours, and the effective rate was 98.9%; The effective hour value of station monitoring is 8,928 hours, the effective rate is 99.6%, and the hourly monitoring data is built on the above web page for query. In the past three years, the efficiency of monitoring station data has reached more than 90%, and the automatic monitoring station data analysis report record sheet will be sent to the bureau for reference before the 10th along with the monthly work report. At 3 stations this year, the highest values of PM10 measured in river dust were 264g/m3 in Liwu Creek at 16:00 on November 3, 109, and PM10 281g/ in Hualien Creek on November 3, 109. m3. PM10 was measured at 157g/m3 in Xiuguluan。 Road cleaning and sweeping operations Cooperate with street washing operations during the period when the dust is high in Hechuan to reduce the hazards to people’s health. The street washing locations are Xincheng Township, Shoufeng Township, and Yuli District. When dust occurs, street washing operations on main roads will be carried out. The street is 5,400 kilometers, and the promotion industry adopts 600 kilometers of street washing. The annual total length of street washing is more than 6,000 kilometers. From October 25, 109 to October 24, 110, a total of 5,400 kilometers of street washing was implemented. The implementation progress was 96%. The promotion industry adopted Washing the street for 600 kilometers, reaching 600 kilometers from October 25, 109 to October 24, 110 has been achieved, and the achievement rate has exceeded 100% to complete the scheduled goal. Emergency drills for river dust incidents in Hualien area On March 31, 110, the Liwuxi River Management Unit, the relevant bureaus of the county government, and various assisting drills were invited to conduct the "River Dust Emergency Response and Prevention Drill" at the Fushi Village Croquet Field, Xiulin Township, Hualien County (by the Liwu River) . Simulate the situation of dust in the river, and through the participation of response units at all levels to participate in the live exercise, strengthen the familiarity with the notification process of the incident and the division of powers and responsibilities, so as to achieve the effect of changing the dust every day. As for the entire exercise process, with the concerted efforts of everyone, the curtain came to a successful conclusion. Although there are some imperfections, these shortcomings also give us room for improvement, but as far as the participating units are concerned, many of them are the first time to participate. It is not easy to be able to invest in this way. It is recommended that before the next exercise, rehearse twice in advance to cultivate mutual understanding and coordination. I believe the entire exercise will be more perfect. Hechuan Dust Education Promotion Conference Tour villages, communities, campuses or patrol teams to handle education promotion meetings. 6 sessions have been completed this year, with 405 participants participating Web page maintenance update Update and maintain the website information of "Hualien County River dust early warning and notification platform" and "river dust prevention and promotion information network platform" of the environmental protection department before the 5th day of each month. The updated items are to handle the activity information every month, maintain the background of the real-time monitoring data of the project monitoring station, upload the project implementation results, and complete the website data update for a total of 12 months during the project period. Innovative approach This plan submitted "Hualien Creek real-time monitoring" on November 11, 109 as an innovation of this year to the Bureau for review and preparation. After being approved by the Environmental Protection Bureau, the Hualien Creek monitor was set up on December 25, 109. 1. Execution method Expected benefits: Monitoring equipment is set up near the estuary of Hualien Creek to watch the riverbed. When strong winds blow up, the chances of raising dust are higher. Real-time images can be sent to the office computer via the network, and planners can determine whether there is any dust in the riverbed. 2. Enefit Real-time monitoring of the Hualien Creek estuary status through the monitoring system. If a dust-raising situation occurs, immediate action can be taken to improve response efficiency and reduce personnel going to the scene when predicting a yellow or red light. In order to calculate the effect of the reduction in the implementation of this plan, Hualien will be calculated The reduction in the distance between the County Environmental Protection Bureau and Hualien Creek, if calculated based on the estimated annual reduction, the number of kilometers per round trip twice a week is 27km, and the reduction factor is 0.000273/km. Therefore, this innovative approach can reduce the amount by 0.65 metric tons/year, or more The basis is the result of estimating the effectiveness of the reduction. The estimated calculation and formula are as follows: Calculation: 0.65 metric ton/year = 1* 0.00027 * (27*8*12) formula: reduction = reduction activity intensity x average pollution reduction per unit mileage x Average annual mileage Evaluation and analysis of the construction method of dust prevention in rivers and rivers In recent years, the Ninth Rivers Bureau has adopted a variety of dust prevention construction methods for Hualien Creek and Xiuguluan Creek under its management. After accumulating experience year by year from the early single construction method, in recent years, priority has been given to compound construction methods that are more suitable for the local topography, such as green cover. , Sand-blocking stone fences and planting windbreak forests, etc., eliminate the construction methods with inferior effects, and then use the water covering method to improve and improve the exposed area. In addition to reducing the cost, it can also increase the efficiency of dust prevention and control. , The goal and vision of shaping the Huadong Rift Valley into an ecological green network and blue-green corridors are worth learning from other river management units. Dust early warning and notification system The PM10 automatic monitoring station of this project is set up in Hualien Creek, Liwu Creek and Xiuguluan Creek to monitor the changes in the concentration of dust in the rivers. The monitoring station samples PM10 per hour of 126 μg/m3 or more, and it sends an alert notification message. If the concentration reaches 600μg/m3 and lasting for more than two hours, immediately start the strain mechanism. In addition, according to climatic conditions, the next three Wuxi, Hualien Creek and Xiuguluan Creek dust early warning scores are performed daily, and the total partition is divided into three levels: green, yellow, and red: 1. Green level 0-19 points-probability of river dust occurrence On the low side, no need for action. 2. Yellow grade 20~26 points-there is a risk of river dust, the previous day through the communication software to notify the relevant units on standby, monitoring through CCTV (Liwu Creek, Hualien Creek) and ask volunteers or this project in the morning and afternoon of the day The personnel inspected on the spot for the presence of dust, and if there is dust, the relevant unit should be involved in suppressing the dust. 3. The red grade is above -27 points, or there is a high probability of dust generation (yellow light 25-26 points). The day before, local TV stations are asked to carry out marquee broadcast to remind residents near the dusty river section to take protective work. According to statistics, from October 25, 109 to October 24, 110, the project carried out dust forecasting for a total of 371 days, with a total of 1,113 forecasts, including 1,099 times for green lights and 14 times for yellow lights, only 1 time. The prediction was missed, and all the dust predictions at all points were accurate. Purchase satellite imagery before the flood season In order to grasp the changes in the exposed areas of rivers and rivers prone to dust in the county, this project will complete the acquisition of satellite imagery before and after the flood season (February to March and June to July), record the changes in the exposed areas of the rivers this year, and carry out the exposed areas. Change comparison. During the research period, it was discovered that previous research data showed that the exposed areas of the riverbed were mostly wet exposed areas after the flood season. Among them, Hualien Creek and Xiuguluan Creek were the most prominent, while Liwu Creek image analysis found that both the upstream (Jinwen Bridge) and the sea estuary were both exposed. There are water blocking facilities, which have been effective in blocking water and reduce the bare land area by 36 hectares. The low beach area of the river bed is often the main reason for the sudden increase of bare land, and it is not easy to grasp, because it is often affected by the flood season and changes. Demonstration meeting to improve the nakedness of rivers It was implemented at 14:00 p.m. on March 31, 110 at the Liwu river dredging site. A total of 40 participants participated in the course. After the explanation, the on-site fact statement was implemented, and a questionnaire survey was conducted after the meeting, so as to understand the feedback of participants on the course. Delineation of the classification of nakedness over the years In order to grasp the changes in exposed areas over the years, collect relevant data and understand the changes in exposed areas, so as to define the level of dust-prone areas. However, in addition to the weather, the most important factor for the occurrence of dust in rivers is the excessively large area of exposed areas, which is an effective supervision and control. Changes in the area of exposed areas of dusty rivers. In addition to regular monthly inspections and records of exposed areas, this plan will also track river management units to conduct river remediation operations and observe the corresponding causal relationship between the rise and fall of exposed areas and the occurrence of dust. The contact meeting will report the opportunity and provide suggestions for the river management agency to suppress the dust.

River dust, PM10 fine suspended particulates, PM10 monitoring, exposed rivers, satellite aerial photography, prevention methods, emergency drills of river dust