高 峰

（遼寧江海水利工程有限公司，遼寧 沈陽110003 ）

　　摘要：為率定白石水庫尾水渠水位-流量關系曲線，以白石水庫尾水渠為研究對象，利用實測數據計算出渠道的斷面尺寸，根據渠道的實際情況選定理論流量計算公式和比降、糙率等系數，經過計算得出水位-流量關系理論曲線，再通過對水庫渠道內低、中、高水位下測流方法的選擇，確定在低水位和高水位下采用浮標法，在中水位下采用流速儀法，并將多次實測結果與理論值進行比較，發現兩者差值均在誤差范圍內，吻合度非常高，最終驗證所繪制的白石水庫尾水渠水位-流量理論關系曲線采用的理論公式和參數準確、合理，曲線精確度符合水庫的實際需求，以此為水庫流量測驗提供可靠的技術支持，同時也為同類型水庫的尾水渠計算下泄流量提供寶貴經驗，可用于今后的泄洪流量測算。

　　關鍵詞：白石水庫；水位-流量關系曲線；流速儀法；浮標法

Calibration and analysis of water level-discharge curve of tailrace of Baishi Reservoir

GAO Feng

(Liaoning Jianghai Water Conservancy Engineering Co., Ltd., Shenyang 110003, China）

　　Abstract:In order to calibrate the relationship curve between water level and discharge of the tailrace of Baishi Reservoir, cross section size of the tailrace of Baishi Reservoir is calculated by use of measured data. According to actual situation of the channel, theoretical discharge calculation formula and coefficient (such as gradient, roughness, etc.) are selected, after calculation, theoretical curve of water level-discharge relationship is obtained. By selecting discharge measurement methods under low, medium and high water levels in the reservoir channel, float method is selected to be used at low water level and high water level situation, current meter method is selected to be used at middle water level situation. By comparing the measured results with the theoretical values for many times, it is found that difference between them is within the error range, and the coincidence degree is very high, which verifies that theoretical formula and parameters used in drawing water level-discharge curve of tailrace of Baishi Reservoir are accurate and reasonable, and curve precision meets reservoir actual demand, which can provide reliable technology support for reservoir discharge measurement, provide valuable experience for the letdown discharge calculation of tailrace of similar reservoirs, and be used for future flood discharge calculation.

　　Key words：Baishi reservoir, water level-discharge curve, current meter method, float method