論文提要內容：
本研究使用微地動量測之方法，針對埔里盆地所作之場址放大效應趨勢之研究和探討，以獲得更多相關的資料，希望藉此能對地震時埔里盆地的場址效應有更深入之了解，並可作為將來埔里地區建築物耐震設計與未來土地使用規畫之參考。
本研究總共在埔里盆地內選取215個觀測站（大範圍盆地內112個，小範圍埔里市區103個），使用單站頻譜比法分析得到各測站之平均頻譜比，再依不同需求選定幾個特定之頻率，將不同測站同一頻率之振幅比值挑出，並做成等值圖，藉以得知埔里盆地在不同頻率下震波放大之趨勢，主要將結果分成兩部分探討。
第一部份是以大範圍之整個盆地為主，將整個埔里盆地分成S1、S2、S3和S4四區對盆地之區域場址效應做探討，將結果與前人文獻做比較，並對結果做資料偏差之討論。分析結果可得，在盆地內長週期之放大高區多在河流沿岸和河流匯流處附近，尤其在南港溪與眉溪附近長週期之場址放大效應更為明顯。可能為埔里盆地之地形向西傾，所有河流最後皆匯流成南港溪從盆地西側流出埔里盆地，導致河道附近常期河水沖積，沖積層較為軟弱，地層速度較低之原故。
第二部份是以小範圍的埔里鎮市區為主，將市區內各測站所得之頻譜比等值圖與921集集大地震埔里市區房屋損壞情形之資料做比較，且對結果做資料偏差之討論。綜合上述之結果，去除結構物本身之問題例如：結構物年齡、形狀、結構設計、施工品質…等，結果顯示埔里市區內建築物損壞和地區場址效應有著密切之關聯。

Using microtremor measurement to study the site effect in Pu-Li basin
We used microtremor measurement to study the site effect in Pu-Li basin, so as to obtain more information and to understand the local site effect during earthquake in Pu-Li basin. Furthermore, the analyses of site effect can be taken as reference for the seismic resistance design and reducing damage from earthquake.
In this study, we set 215 stations (a wide range in whole basin has 112 stations ; a narrow rang in Pu-Li downtown has 103 stations). The microtremor data were analzzed by horizontal to vertical (H/V) spectral ratio of. Then, choosing several specific frequencies draw the H/V spectral ratio contour. We divided the result into two part to discuss to understand the tend of seismic waves amplification in difference frequency in Pu-Li basin.
The first part for whole basin, we divided Pu-Li basin into 4 areas (S1, S2, S3 and, S4) to discuss the local site effect including the standard deviation of result. The result show that most of long period amplifications are along the rivers or near the rivers junction. The reason is due to the alluvium in these areas are thicker or the velocity are smaller.
The second part is downtown. We compared H/V contours with the situation of buildings damage in Pu-Li during the Chi-Chi earthquake. The results show that there are close relationship between the buildings damage and local site effect in Pu-Li downtown area.

Cheng, P. H., (1984). A geoelectric resistivity survey in PULI basin, Bull. Geophys. Natl. Central Univ. Roc., No.26,107-124.
Kanai, K. and T. Tanaka, (1961). On microtremor, VIII, Bull. Earthq. Res. Inst. , 39, 97-114
Lachet, C. and P. Y. Bard, (1994). Numerical and Theoretical Investigations on the Possibilities and Limitations of Nakamura’s Technique, J Phys. Earth, 42, 377-397
Lermo, J. and F. J. Chavez-Garcia, (1993). Site effect evaluation using spectral ratio with only one station, Bull. Seism. Soc. Am., 83, 1574-1594
Lermo, J. and F. J. Chavez-Garcia, (1994). Are microtremor useful in site response evaluation?, Bull. Seism. Soc. Am., 84, 1350-1364
Molas, G. L. and F. Yamazaki, (1995). Attenuation of earthquake ground motion in Japan including deep focus events, Bull. Seism. Soc. Am., 85, 1343-1358
Nakamura, Y., (1989). A method for dynamic characteristies estimation of subsurface using microtremor on the ground surface, QR of RTRI 30, no.1,February,25-33
Yamaxaki, F. and M. A. Anstry, (1997). Harizotal-to vertical spectrum ratio of earthquake reound motion for site characterization, Earthquake Eng. And Struct. Dyn., 26, 671-689
唐昭榮，2001。探討埔里地區之場址特性,中正大學碩士論文，共93頁。
黃文紀，1986。羅東強震振儀陣列區微地動之來源與特性，國立中央大學碩士論文，共101頁。
黃鑑水、謝凱旋、陳勉銘，2000。五萬分之一埔里地質圖及說明書，經濟部中央地質調查所，共75頁。
彭瀚毅，1998。臺北盆地場址效應之研究，中央大學博士論文，共227頁。
溫國樑、王乾盈、柴駿甫、洪李陵、歐國斌、劉忠智、蔡義本，1999。921集集大地震全面勘災報告－強地動振動調查，國家地震工程研究中心，共75頁。
溫國樑、孫美蓉，1985。微地動調查在工程上之應用，地球物理之工程應用研討會論文集，第189至224頁。
溫國樑、黃柏壽、羅俊雄、彭瀚毅、張芝苓、陳阿斌，2000。「九二一集集大地震後續短期研究──台灣中部地區微地動調查」報告，國家地震工程研究中心。
溫國樑、彭瀚毅、林正洪、林仁慶，1999。新竹科學園區之振動量測，中央研究院地球科學研究所，共89頁。
羅偉，吳樂群、陳華玟，1999。五萬分之一國姓地質圖及說明書，經濟部中央地質調查所，共71頁。