| This article has been：Browse 1196Times Download 1225Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2019310 |
|
| Study on Calculation Method of Water Utilization Coefficient of Canal System of Duplex Section |
|
YAN Shuo1，WANG Liquan1*，LI Tienan2，QIN Longfei3
|
|
1.College of Water Conservancy and Electric Power, Heilongjiang University, Harbin 150080, China; 2.Heilongjiang Water Conservancy Research Institute, Harbin 150080, China; 3.Zhaoqing Water Conservancy and Hydropower Survey and Design Institute Co., Ltd, Zhaoqing 526000, China
|
| Abstract: |
| 【Objective】We aimed tostudy on a more accurate method for calculating the water use coefficient of canals in a compound section of an agricultural irrigation area 【Method】In this paper, the hydrodynamic factors in each section of the channel were determined by the dynamic water measurement method. Then, the revised Davis-Wilson formula and the Kosgakov channel leakage empirical formula were used to obtain the water utilization coefficient of the multi-section canal system in the study area. Water loss in each channel and canal water loss of the canal system were compared and analyzed. 【Result】The dynamic water measurement method is more suitable for the calculation of the hydraulic elements of the continuous flow section channel system. The standard trapezoidal section channel lining method has the least loss. The Kasgakov channel leakage experience formula is used to obtain the canal water utilization coefficient of the irrigation area being 0.75. The Davis-Wilson formula finds that the canal water utilization coefficient of the irrigation area is 0.82, which is closer to the actual value of 0.86, and the accuracy is improved by 9.5%. 【Conclusion】Due to the influence factors such as land occupation and excavation, the multi-section canal system is formed after the lining of the canal in the irrigation area. The channel lining of the irrigation area is preferably lining by trapezoidal section. For this type of canal system, the dynamic water measurement method is obviously superior to the typical channel measurement method. The Davis-Wilson formula is also more suitable for the determination of the canal water utilization coefficient of the complex section canal system. |
| Key words: hydrodynamic method; water utilization coefficient of canal system; Davis-wilson formula; Canal |
|
|
