應用WASP模式評估污水下水道接管對河川水質改善之成效－以二仁溪為例

Applying the WASP Model to Evaluate the Effect of Wastewater Sewer Takeover on River Water Quality Improvement - A Case Study of the Erren River

朱立倫(Li-Lun Chu) ； 張嘉玲(Chia-Ling Chang) ； 楊宗祐(Zong-You Yang) ； 蘇致仁(Jhih-Ren Su) ； 林新源(Sin-Yuan Lin)

《農業工程學報》 64卷4期 (2018/12) Pp. 76-83

https://doi.org/10.29974/JTAE.201812_64(4).0005

摘要

二仁溪是台灣南部重要的河川之一，屬於中央管的河川，主要受到來自高雄與台南兩個地區的污染，流域的周遭有許多的工廠，因此有許多進入河川的污水可能尚未處理或是有偷排進入河川的情況，因此使得河川水質呈現較差的情形，進而導致河川的水無法直接使用，因此二仁溪也被列為重點管理河川之一。本研究針對水質改善提出兩種方案，第一種為增加污水下水道接管率，改善排水濃度，使排水進入河川水質都符合放流水標準；第二種方案為總量管制，分別對各排水減少50%污染量、減少100%污染量以及減少上游邊界污染濃度使其達到公告水體水質標準三種情境進行模擬，並探討改善的效果。由結果得知BOD以改善放流水的效果較佳，可使河川超過污染標準的超標率降至8%，而SS則以改善上游的污染能有較好的成效，可使超標率降至0%。

關鍵字

WASP模式 ； 河川水質模擬 ； 水質改善

並列摘要

The Erren River is one of the important rivers in southwestern Taiwan. The river belongs to the Central Administration. Its pollution mainly comes from Kaohsiung and Tainan. There are many factories in this basin. The sewage entering the river may not be treated, so that the water quality is poor and need to be improved. Therefore, the Erren River is listed as one of the key management river. This study proposes two solutions for water quality improvement for the Erren River. The first is to increase the sewage treatment rate and to improve the drainage concentration so that drainage into the river water quality can meet the discharge water standard. The second way is to control the total pollution loads. The scenarios are to reduce 50% and 100% pollution loads, and the concentration of pollution at the upstream boundary. This study discusses the efficiency of these pollution reduction strategies. The results show that BOD can be reduced when increasing the sewage treatment rate, while SS reduction needs to control upstream pollution loads.

並列關鍵字

WASP ； water quality simulation ； water quality improvement