EFFECT OF SHOCK WAVES ON RILL FORMATION  

作　　者：KeliZHANG LifangLUO ShuangcaiLI 

机构地区：[1]AssociateProfessor [2]MasterStudent,DepartmentofResourceandEnvironmentalScience,BeijingNormalUniversity,Beijing,100875,China

出　　处：《International Journal of Sediment Research》2004年第2期149-153,共5页国际泥沙研究（英文版）

基　　金：supposed by the National Natural Science Foundation of China(40271072)and(40235056)

摘　　要：Hydraulic mechanism of rill formation was studied theoretically and experimentally. It wasassumed that the impact of varied boundary on overland flow results in fluctuating of watersurface, and shock waves that may contribute to the formation of rills. Both theoretical derivationand laboratory experiments were used to compare the hydraulic characteristics of flow with andwithout shock waves. Results showed that shock waves can lead to an increase in flow depth,flow velocity, and turbulence intensity. Consequently, flow shear stress or stream energyincrease dramatically and rill headcuts may occur where shock waves converge.Hydraulic mechanism of rill formation was studied theoretically and experimentally. It wasassumed that the impact of varied boundary on overland flow results in fluctuating of watersurface, and shock waves that may contribute to the formation of rills. Both theoretical derivationand laboratory experiments were used to compare the hydraulic characteristics of flow with andwithout shock waves. Results showed that shock waves can lead to an increase in flow depth,flow velocity, and turbulence intensity. Consequently, flow shear stress or stream energyincrease dramatically and rill headcuts may occur where shock waves converge.

关 键 词：Shock waves Rill formation Head cut 

分 类 号：P334.4[天文地球—水文科学]