應用AERMOD 模式於台灣之複雜地形之探討

Study on AERMOD Model Application to Complex Terrain Effect in Taiwan

林志柏(Chih-Po Lin)

指導教授 ： 鄭福田

國立臺灣大學/工學院/環境工程學研究所/碩士(2010年)

https://doi.org/10.6342/NTU.2010.03129

摘要

美國環保署已在2005 年，將AERMOD 公告為固定污染源的優選
擴散模式，來取代舊有的ISC 擴散模式；由於AERMOD 改變ISC 部
分的模擬演算公式與方法，如AERMOD 在複雜地形中煙流的傳輸過
程與處理方法和ISC 不同，其計算模擬範圍內每個受體點的臨界煙流
高度，此高度決定煙流是否越過或繞過地形；因此本篇研究主要探討
在複雜地形效應下兩模式的擴散情形及AERMOD 在台灣的適用性。
首先，比較兩種空氣品質模式原理如大氣穩定度、混合層高度的
計算和地表特性敏感度分析；接下來，以複雜地形條件下的電廠為模
擬案例，結果顯示：最大著地濃度均發生在地程較高的地方，且可以
預期的是，AERMOD所模擬結果大部分會比ISC模擬濃度低，而兩模
式的濃度差異會隨平均時間增加而變大，年平均值差異最大。再來測
試容許增量限值，AERMOD所模擬結果較可符合法規標準。
最後將電廠附近監測站作為受體點模擬並與觀測值做比較，由於
在夜間混合層高度會比煙囪有效高度低，所以比較兩模式於日間時段
模擬濃度與觀測值的相關性，而AERMOD 模式在對流條件下考慮三
煙流模式計算方法，在濃度分布上較ISC 接近觀測值。

關鍵字

AERMOD ； ISC ； 複雜地形 ； 混和層高度監測站 ； 容許增量限值

並列摘要

AERMOD (AMS/EPA Regulatory Model) was officially
promulgated as the U.S. EPA preferred dispersion model for industrial
point sources on 2005. AERMOD’s model formulation contains many
changes over its predecessor, ISC (Industrial Source Complex Model). As
plume transport is handled differently in AERMOD than the COMPLEX
portion of ISC. Calculating the dividing streamline height at receptor
within a domain and determining whether a plume will rise over or
diverge around it. On this study, both models are simulating the complex
terrain effects and the applicability of AERMOD in Taiwan.
First of all, the comparison theory of two air quality models, such as
atmospheric stability, mixing layer height and sensitivity analysis of
surface characteristics. Second, the simulation of power plant cases on
complex terrain. The result: the maximum concentration often occurs on
the higher ground level. It’s expected that the AERMOD results most of
predicted lower concentrations than ISC. The differences between the two
models tended to increase with averaging time, the largest differences
were in the annual average. In testing the allowable pollutant increase
limits (APIL), the amount of concentration is better less than regulatory
standards by the AERMOD tested.
Finally, the Monitoring station near the power plant as a receptor
simulation and compared with the observed, due to the mixing layer
height at night than the effective stack height is low. Comparing the two
models during the daytime simulation of concentration and observed
value relevance. But AERMOD model considers the computing three
plume treatment of the convective boundary layer (CBL), the
concentration distribution close to observed value than the ISC.

並列關鍵字

AERMOD ； ISC ； Complex terrain ； Mixing layer height ； Monitoring Station ； Allowance pollutant increase limits

參考文獻

VOLUME I - USER INSTRUCTIONS U.S., EPA-454/B-95-003a

56. 行政院環境保護署，空氣品質模式模擬規範，環署空字第０９２００９４２

考核計畫(三)－ISC本土化煙流擴散模式之發展，行政院環境保護署

61. 陳韋名，2007，應用CALPUFF模式於複雜地形與建築物效應之研究，國立

JEFFREY C.WEIL, ROBERT J. PAINE, ROBERT B. WILSON, RUSSELL F.