EPA-105-GA13-03-A184

105

4,600 千元

2016/05/31

2016/12/31

陳志欣

土污基管會

李宜靜

艾奕康工程顧問股份有限公司

土壤及地下水

概念場址模型、底泥污染傳輸模式、底泥污染整治

Conceptual Site Model、pollution transport model in sediment、sediment pollution remediation

勇興台

柯宏杰

02-27200999#

jay.ke@aecom.com

本計畫目的包括運用補充調查資料，強化底泥污染傳輸模式，利用底泥污染傳輸模式建置原則進行初步模擬，並研究提出底泥品質管理策略。 本計畫蒐集阿公店水庫及阿公店溪之地文、水文、人文背景條件及彙整既有之水質及底泥調查資料作為參考，依本計畫需求規劃整體補充調查內容，強化底泥污染傳輸模式之率定驗證，並進行情境模擬以預測設定情境下之底泥變化，以建議阿公店水庫及阿公店溪之管理方案。 依據本計畫補充調查結果顯示，阿公店水庫之底泥僅重金屬鎳及砷超過底泥品質下限值，與集水區坡地土壤補充調查結果比較，顯示庫區內底泥多來自於集水區土壤沖刷之結果。阿公店溪底泥中鉻、銅、鋅、鎳、砷均曾出現高於上限値之情形，汞則有高於下限値之情形，針對這六種重金屬進行底泥污染傳輸模式率定驗證，並進行各種污染情境模擬，結果顯示「全河段挖除底泥並管制支流污染源」及「高於上限值之河段設置遮罩並管制支流污染源」，均可使重金屬在底泥之濃度降低至低於下限值，顯示除必要之底泥管理及減量作為外，亦須配合外來污染源之削減控管，方可避免出現底泥中重金屬濃度之顯著累積情形。 此外，針對國內底泥品質管理策略，本計畫先收集國外底泥管理策略，並分析國外場址處理經驗，提供國內參考。提出國內底泥污染管理方案之建議，並依據阿公店溪流域之特性，建議適用之管理策略。對於未進行底泥補充調查之水體，本計畫就現有水質資料建置底泥污染傳輸模式，以協助定義高污染區位，作為後續作業及研究之參考。

概念場址模型、底泥污染傳輸模式、底泥污染整治

EPA-105-GA13-03-A184書面正式報告本文.pdf

38MB

2017/4/1 上午 12:00:00

The objectives of this project include using the supplemental investigation data, strengthening the sediment pollution transfer model, applying model building principles of sediment transfer model to perform preliminary simulation, and processing research to put forward the sediment quality management strategy. The project had collected the water quality and sediment investigation data of Agongdian Reservoir and Agongdian Creek as a reference. According to the requirement of the project, it had been planned to process supplement investigation and to strengthen the verification of the sediment transfer model. Processing the scenario simulations is the next step to predict the diversification of the sediment under presumed condition. The results mentioned above are integrated to suggest the management plan of Agongdian Reservoir and Agongdian Creek. According to the supplementary investigation results of the project, only the heavy metal nickel and arsenic in the bottom sediment of Agongdian Reservoir exceeded the lower limit of sediment quality. Comparing with the supplementary investigation results of the sloping land in the catchment area, the sediment in the reservoir area was mainly from the erosion of catchment soil. Part of the concentrations of chromium, copper, zinc, nickel and arsenic in Agongdian Creek were higher than the upper limit, and mercury was higher than the lower limit. The verifications of the sediment transfer model for these six heavy metals and scenario simulation of various pollution were processed. The results of scenario simulation showed that these two scenario, "excavation of sediment in the whole river section and control of pollution sources in tributary" and "setting of in-situ capping in the river section with heavy metal higher than the upper limit and control of pollution sources in tributary", can control the concentration of heavy metals in sediment to be under the lower limit. It was also shown that, in addition to the necessary management and reduction of heavy metals in sediment of pollutant sources, it was necessary to coordinate with the reduction and control of the external pollution sources in order to avoid the significant accumulation of heavy metal concentrations in the sediments. In addition, for the sediment quality management strategy in Taiwan, foreign sediment management strategies were collected and analysis of foreign experience of site remediation, to provide domestic reference. Domestic management strategies of sediment was suggested and the applicable management strategy was proposed according to the characteristics of the Agandian River Basin. For water bodies that have not processed supplementary investigation of sediment, the project will develop a sediment transfer model for existing water quality data to assist in the definition of highly polluted areas. The simulation results could be reference for subsequent operations and studies.

Conceptual Site Model、pollution transport model in sediment、sediment pollution remediation