| 英文摘要 |
According to this plan, each month, the researcher will summarize the results of the water quality monitoring of 24 main and secondary rivers in the southern region, analyze the river pollution index (RPI, including four indicators, namely DO, BOD, SS and NH3-N), and study the causes of the degradation of the water at key monitoring stations and items that got damaged. Based on those efforts, the researcher will report suspected sources of pollution, whose inspection and control shall be strengthened. More works shall be done to the eight key rivers (namely the Zhuoshui River, Xinhuwei River, Beigang River, Jishui River, Yanshui River, Erren River, Agongdian River and Ai River) in the southern region, including updating the environment background information, collecting the results of the supplemental surveys on the water quality and quantity over the years, re-drawing the pollution load fishbone diagrams, analyzing the change trend of the water quality, screening severely polluted river sections, and summarizing measures taken to abate pollution and what have been achieved till now. Those works enable the researcher to review the strategies adopted to control the river pollution and come up with suggestions for improvement. What's more, through this plan, the researcher has examined the performance of 10 counties and cities in the southern region on river quality control, combined the Erren River Website, updated and maintained the website of onsite processing facilities. Based on this plan, the 2020~2025 overall public construction plan (Draft) has been made, the overall water pollution control plans of, the 10 districts and cities in the southern region have been reviewed and optimized. Thanks to subsidies funded by the central government, technical assistance, discussions on policy-making and liaison meetings, local governments have made more efforts to implement pollution-control measures, so as to effectively improve the water quality and control the river pollution.
One and a half years has passed since the East-to-West Ditch I and Ditch II of Changhua County announced to carry out total emission control in May 2016, which has abated the heavy metal pollution. In 2017, the emission of copper in Sanye River, Tainan City has exceeded the standard by 57%. If this situation lasts in the first quarter of 2018, the Tainan City Environmental Protection Bureau should reuse and tighten the legal procedures on control of the discharge of copper-bearing water. The remediation canal initiated by Gangshan workstation on the Agongdian River tends to grow excessively high. Kaohsiung Environmental Protection Bureau shall continue to investigate the nearby irrigation and drainage channels and collect information such as their distributions, flow direction and water consumption, as well as the number of enterprises along the river, the features and distribution of their wastewater discharge, and analyze the cause and scope of the high copper concentration. Based on above works, the feasibility of the standard on the discharge of copper-bearing water or the total emission control can be assessed.
After the upstream livestock farms started to use stools, urine, biogas slurry, and biogas residue to fertilize the farmland as suggested by Jishuixi Bridge Monitoring Station, along the Highway 19A of Taiwan, the average ammonia concentration got by this station has dropped from 2.8 mg/L in 2014-2016 to 1.49 mg/L in 2017. Compared with the livestock farms close to monitoring stations located upstream, which still use the traditional fertilizer, the ammonia concentration got by those stations in 2017 has no significant change over that of the same period in the past years. Obviously, the use of stools, urine, biogas slurry, and biogas residue as fertilizers for the farmland do improve the average ammonia nitrogen concentration of the water inspected by Jishuixi Bridge Monitoring Station, along the Highway 19A of Taiwan.
Upon this plan, the "Program on Promotion of Water Quality of Rivers and Oceans (Draft)" has been proposed , covering the target of the national river ＆ ocean pollution control during 2020-2025, the annual performance indicators and measurement criteria, the annual plan implementation strategy, work contents, methods and division of labor, resources required, financial sources, and calculation benchmarks, funds required for each year, expected effect and impact, economic benefit assessment, etc. Total funds required (from central and local governments) is about NTD 7.59 billion, showing a price-to-earnings ratio of 2.15. In the long term run, the plan will produce economic benefit.
|