The Dezikou Stream originated from the Hengludi Mountain of the Snow Mountains and flows through Jiaoxi Township, Zhuangwei Township, and Toucheng Township in Yilan County; the main river channel is of moderate pollution level according to the monitoring results of the Water Quality Monitoring Station of the Environmental Protection Agency over the years. The cause may be caused by pollution sources such as urban domestic sewage, livestock wastewater, and business wastewater in the upstream basin that enter the mainstream through various tributaries or drainage channels. It also addresses the problem of excessively high ammonia nitrogen concentration in the water, which consumes dissolved oxygen in the water and deteriorates water quality. Problems such as the death of aquatic organisms and the generation of foul smells in the water body have caused the problem of poor perception among the people. Therefore, this plan implements the ammonia nitrogen reduction facility plan for the upper part of Dezikou Creek. Based on the survey results of the pollution source of the upstream water discharge of Dezikou Creek, the critical river reaches with serious pollution in the upstream (Li Baoxing drainage includes animal husbandry and The waterway of the Sanminwu Middle Drainage), implement the ammonia nitrogen reduction facility plan, through the facility water purification treatment to reduce the concentration of ammonia nitrogen in the water and then enter the mainstream, with the goal of sustainable water quality, continue to reduce the amount of water pollution and ammonia nitrogen reduction, to help The follow-up project is promoted to reduce the total pollution of ammonia nitrogen discharged into the water body.

wetlands