首度指出水庫規線是由四種直線段所組成，其分別為➀下降段➁上昇段➂轉換段I(由下降段轉換成上昇段之過度段為一水平線段)➃轉換段II(由上昇段轉換成下降段之過度段為一水平線段)。應用模擬模式，可依序訂出四線段，為一便捷之實用方法。為更精確的決定規線之位置，提出了臨界入流量之概念，同時也嘗試了合成此種流量之方法。應用在翡翠水庫，產生了較可接收之成果。檢討後對合成臨界入流量之方法也提出了改進之建議，以便建成更實用可靠之規線。 his research is the first study identifying that a reservoir rule curve can be decomposed into four segments, namely, 1) a descending segment, 2) an escalating segment, 3) transition segment I (the horizontal transitioning segment from descending to escalating segment), and 4) transition segment II (the horizontal transitioning segment from escalating to descending segment). Simulation modeling, serving as an effective tool, identifies four consecutive segments. This study proposes to use critical inflow to better position the reservoir rule curve. We further apply this synthetic critical inflow approach to the case of Feitsui Reservoir and yield results that may lead to . In this research, extensive investigations also render improvements on the synthetic critical inflow approach, which are believed to contribute to a more reliable reservoir rule curve.