本文說明利用數值分析配合實測資料訂定翡翠大壩變位監測警戒值之過程與結果。訂定警戒值之前，首先建立壩體－基礎岩盤數值模型，並利用實測及實驗資料加以驗證。警戒值訂定之方式為先固定庫水水位，利用氣溫及水溫計算模式分別建立一年內之旬平均氣溫曲線及各月穩態水溫分佈，接著利用溫度計算模式建立各月壩體之穩態溫度分佈，最後以ABAQUS進行大壩靜態變位分析，得到壩體各月份之變位，選取最大及最小變位即為該水位下之警戒上、下限（即警戒值），變換不同水位，重複相同過程，逐步建立各個水位下壩體之變位警戒值。本文最後針對視窗化「翡翠大壩變位展示與警戒值查詢系統」之功能及特性進行簡單的介紹。

This paper describes the determination of warning values for the measured displacement of the Fei-Tsui arch dam based on numerical analysis and field measured data. The dam-foundation rock numerical model was first developed and verified by using data from the field and experimentation. The warning values for the dam displacement were obtained as follows. First, the ten-day mean air temperatures and steady-state monthly water temperatures in a year for a specific reservoir level were determined, followed by the establishment of the steady-state temperature distribution in the dam body. Second, a static dam displacement analysis was performed using ABAQUS with the dam-foundation rock model and the monthly temperature distribution of the dam body to obtain the displacement of the dam for each month. The maximum and minimum values among the displacement for all the months in a year were chosen respectively as the warning upper and lower limits, i.e., the warning values, for the reservoir level. By repeating the above procedures for all the reservoir levels considered, a set of warning values for the measured displacement of he dam was obtained. In the final part of the paper, the features and functions of the