Research on the Correction of Kosjakov Improved Formula Based on Dynamic Water Method

基於動水法實測的考斯加可夫改進公式修正研究

MEI ZHU ； JIE XU ； ZUCHENG XU ； XIAOLE LI ； QUANJIN SU

《台灣水利》 70卷3期 (2022/09) Pp. 53-63

https://doi.org/10.6937/TWC.202209_70(3).0005

摘要

This study aims to improve the applicability of the Kosjakov improved formula in canal water utilization coefficient calculation, and Pihe Irrigation District was selected as the research object. The canal water utilization coefficient of Pihe main canal, Wadong diversion canal, Mubei sub-main canal and Zhangshou branch canal were measured by the dynamic water method. Based on the generalization of the soil permeability coefficient and refinement of the reduction factor of canal lining, the above four-level canal water utilization coefficients were calculated by Kosjakov improved formula. The relative error of the measured value and the calculated value of the canal water utilization coefficient was analyzed. The correction coefficient of Kosjakov improved formula was proposed based on the canal length. The Kosjakov modified formula was determined as the relative error of less than 5%. Based on the measured canal water utilization coefficient of the dynamic water method in Shihe main canal and Shulu diversion canal, Kosjakov modified formula can respectively increase the accuracy of calculation by 31.9% and 53.3% compared with the Kosjakov improved formula. This study improves the calculation reliability of Kosjakov improved formula in the canal water utilization coefficient of irrigation districts, which provides theoretical and technical reference for the refined water resources management of irrigation districts.

關鍵字

Kosjakov improved formula ； Dynamic water method ； Canal water utilization coefficient ； Correction factor

並列摘要

為提高考斯加可夫（Kosjakov）改進公式在渠道水利用係數計算中的適用性，選取淠河灌區為研究對象，採用動水法實測淠河總幹渠、瓦東幹渠、木北分幹渠和張壽支渠四級渠道的渠道水利用係數，通過概化土壤透水係數和細化襯砌折減係數，利用Kosjakov改進公式計算了四級渠道水利用係數，分析渠道水利用係數的實測值和計算值相對誤差，建立渠道輸水損失率與相對誤差的相關關係，提出基於渠道距離基礎上的Kosjakov改進公式修正係數，以相對誤差小於5%為標準，修正Kosjakov改進公式。經史河總幹渠、舒廬幹渠部分渠段動水法實測資料驗證，修正公式相比改進公式計算渠道水利用係數精度分別提高了31.9%、53.3%。本研究提高Kosjakov改進公式在灌區渠道水利用係數計算可靠性，為灌區精細化的水資源管理提供理論和技術參考作用。

並列關鍵字

考斯加可夫改進公式 ； 動水法 ； 渠道水利用係數 ； 修正係數

參考文獻

Kats D. B., “Irrigation Canal Lining,” Beijing: Water Conservancy Press, 1980. [In Chinese]

Jia, H. W., Zheng, S. Z., “Theory, Method and Application of Irrigation Water Utilization Efficiency”, Beijing: China Water Conservancy and Hydropower Press, Vol. 2, 2013. [In Chinese]

Guo, Y. Y., “Farmland and Water Conservancy, Beijing: Water Conservancy and Electric Power Press, Vol 1986. [In Chinese]

Rong, F. T., “Discussing the Kosjakov Empirical Formula,” Shanxi Water Conservancy Science and Technology, Vol. 1, 7-10, 2004. [In Chinese]

Jiang, C. A., Gao, H., Fan, S. W., Shao, Y. C., “Discussion on Calculation Method of canal Leakage,” Water-saving Irrigation, Vol. 5, 28-29, 2006. [In Chinese]