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通过实验室人工降雨水槽试验，初步研究了坡面浅层均匀流及由降雨形成的浅层沿程变量流的流动阻力规律．根据试验中观察到的物理现象及对实测资料的分析，进一步明确了坡面浅层水流与一般明渠流水力特性的差别，揭示了降雨、坡度和表面粗糙度对浅层流流动特性的影响，提出了＂伪层流＂的概念，根据实测资料建立了不同流区的Ｄａｒｃｙ－Ｗｅｉｓｂａｃｈ阻力参数ｆ的定量关系式．研究成果可用于坡面流汇流计算及土壤侵蚀、产沙模拟等生产实践．
Abstract：The author, through flume experiment with simulated rainfall, has studied the hydraulic resistance law of overland steady uniform and spatially varied sheet flow on slope. According to analysis of experimental data and physical phenomena, the difference of overland sheet flow from conventional open channel flow for specific properties of hydraulic friction, and the effect of rainfall, slope and bed surface on flow characteristics of sheet flow have been understood.The concept of "pseudo-layer flow" has been defined in this paper. The quantitative formula of Darcy-Weisbach friction coefficient for different flow types of overland sheet flow has been established through. the regression analysis of the experimental data.
［1］YangNamYoonandHarryG．Wenzel，MechanicsofSheetFlowunderSimulatedRainfall，J．oftheHyd．Div．，ASCE，Vol．97（HY9），1971，pp．1367－1386．［2］H．W．ShenandR．M．Li，RainfallEffectonSheetFlowoverSmoothSurface，J．Hyd．Div．Proc．ASCE，Vol．99（HY55），1973，pp．771－792．［3］W、W．Emmett，OverlandFlow，InHillslopeHydrology，ed．byM．J．Kirkby，NewYork：JohnWiley＆Sons．1978．［4］姚文艺、陈国祥，雨滴降落速度及终速公式，河海大学学报，1993，21（3）．［5］姚文艺，降雨影响下坡面流的基本方程．黄河水利委员会水利科学研究院科学研究论文集（第四集，泥沙·水上保持）．中国环境科学出版社．1993．
基本信息:
DOI：10.16239/j.cnki.0468-155x.1996.01.010
中图分类号:TV133.1
引用信息:
[1]姚文艺.坡面流阻力规律试验研究[J].泥沙研究,1996(01).DOI:10.16239/j.cnki.0468-155x.1996.01.010.
基金信息: