杨帆,张宽地,杨婕,杨明义,马小玲.不同覆盖度下坡面流植被阻力特性研究[J].农业机械学报,2016,47(11):157-162.
Yang Fan,Zhang Kuandi,Yang Jie,Yang Mingyi,Ma Xiaoling.Characteristics of Vegetation Resistance in Overland Flow under Different Coverages[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(11):157-162.
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不同覆盖度下坡面流植被阻力特性研究   [下载全文]
Characteristics of Vegetation Resistance in Overland Flow under Different Coverages   [Download Pdf][in English]
投稿时间:2016-07-07  
DOI:10.6041/j.issn.1000-1298.2016.11.021
中文关键词:  坡面流  明渠水力学  植被覆盖度  植被阻力
基金项目:国家自然科学基金项目(51579214)、中央高校基本科研业务费专项资金项目(Z109021564)、黄土高原土壤侵蚀与旱地农业国家重点实验室主任基金项目(A314021402-1619)和流域水循环模拟与调控国家重点实验室开放基金项目(IWHR-SKL-2014)
作者单位
杨帆 西北农林科技大学 
张宽地 西北农林科技大学
中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室 
杨婕 西北农林科技大学 
杨明义 西北农林科技大学 
马小玲 西北农林科技大学 
中文摘要:为深入研究植被覆盖下坡面流阻力规律,以植被覆盖下明渠水流植被阻力公式为基础,通过5个覆盖度、6个坡度和7个流量组合条件下的室内放水试验,结合理论分析,建立适应于坡面流的植被阻力模型。结果表明,植被阻力随等效覆盖度和等效水力半径的增加而增大,等效覆盖度对植被阻力的贡献率(0.106)小于明渠水流(0.167),而等效水力半径(0.5)和拖曳力系数(0.5)的贡献率与明渠水流(均为0.48)基本一致。植被阻力模型的NSE值高达0.84,为坡面流植被阻力计算奠定了一定的理论基础,可促进明渠水力学理论在坡面水流方面的扩展。
Yang Fan  Zhang Ku  i  Yang Jie  Yang Mingyi  Ma Xiaoling
Northwest A&F University,Northwest A&F University;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University,Northwest A&F University,Northwest A&F University and Northwest A&F University
Key Words:overland flow  open channel hydraulics  vegetation coverage  vegetation resistance
Abstract:For further researching the laws of flow resistance, based on the vegetation resistance model under open channel flow, vegetation resistance models were established under six slopes (2°~12°), 〖JP2〗seven flow discharges (3.65L/min, 4.92L/min, 8.13L/min, 11.78L/min, 15.47L/min, 19.12L/min and 27.26L/min) and five vegetation coverage degrees (9.300%,6.975%,4.650%,2.325% and 0) by combined experiment with theory which was adapted to overland flow. Equivalent coverage and equivalent hydraulic radius were defined in the model based on the definition of vegetation coverage and the hydraulic radius in the open channel flow. The results showed that when the other hydraulic conditions were identical, vegetation resistance was increased with the increase of equivalent coverage and equivalent hydraulic radius, the contribution rate of equivalent coverage (0.106) was less than that (0.167) of the open channel flow; however, the contribution rates of equivalent hydraulic radius (0.5) and the drag force coefficient (0.5) were approximately identical with those of the open channel flow (both of values were 0.48), the NSE value of the model was 0.84. This article distinguished vegetation resistance and comprehensive vegetation resistance, which may provide the theoretical basis for calculation of vegetation resistance of overland flow, so as to promote the expansion hydraulics theory of the open channel in the aspect of overland flow.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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