- Thesis topic: Study on the remediation direction of reservoir eutrophication-taking Baoshan Reservoir as an example

- Doi: https://doi.org/10.6840/cycu201900027

- Abstract: 

      The reservoir stream and reservoir area of the reservoir are mostly located in environmentally sensitive areas, which means that they are located in the water quality protection area. Therefore, most of them are prohibited from development, and their original topography is maintained as much as possible. However, due to the narrowness of the land, in order to promote economic development factors such as sightseeing and leisure. The reservoir stream and the reservoir area are facing many problems, especially the water body is very troubled.
       This study selected Baoshan Reservoir for pollution source investigation because the water supply object of Baoshan Reservoir is Hsinchu Science Park, and its output value contribution is quite high. Therefore, it is necessary to ensure the stability of its water quality so as to avoid pollution caused by improper development. This study uses mobile GPS positioning for immediate monitoring, and samples are sent to the testing organization identified by the Environmental Inspection Institute for analysis.
        This study used River Pollution Index (RPI), Wen's WQI Water Quality Index (WQI8), Ouyang's WQI Water Quality Index (WQI5), and Wen's Modified WQI Water Quality Index (Water). Quality Index 7, WQI7) and Carlson trophic state index (CTSI) were used to analyze the water source in the reservoir area and the upper reaches of the reservoir area. Most of the above five indicators showed good water quality, but the Carlson index showed normal nutrition. The eutrophic state indicates that the three parameters of total phosphorus, transparency and chlorophyll a in the Carlson index should be analyzed for correlation and the grading index or weight calculation or change calculation formula of each parameter, instead of averaging the three parameters.
          However, the entrance to the reservoir stream and the erosion of the soil during the rainy days are more important. The water and soil conservation work should be emphasized. The pollution area is mostly located in residential areas, sightseeing areas, agricultural areas and camps. Therefore, factors affected by human influence. Larger. In view of the human influence, in addition to strengthening the propaganda, it is advisable to set up pollution prevention equipment first. In the population and waste water concentration areas, such as residential areas and sightseeing areas, FRP type building sewage treatment facilities can be installed. In agriculture and fruit parks, it is recommended to adopt natural sewage purification facilities (ecology method) in order to reduce development impact. , inter-gravel aeration treatment facilities), and then carry out the medium and long-term goals (such as the construction of sewage treatment plants and the promotion of sewer construction).

Keywords: Reservoir eutrophication, reservoir pollution source survey, river pollution index, Carlson index