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depth of debris flow
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  “depth of debris flow”译为未确定词的双语例句
     SOME PROBLEMS ON THE BURIAL DEPTH OF DEBRIS FLOW DAM FOUNDATION IN SICHUAN AND YUNNAN PROVINCES
     川滇两省泥石流拦沙坝基础埋深应考虑的几点
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     This paper puts forward a calculation using parameters such as debris-flow density and gully gradient to determine the depth of debris flow and hence complete the correction.
     为此作者提出了用当时均有观测值的泥石流容重和沟床比降等计算残留层厚度的方法 ,以及不动层的处理意见 ,以确定当时泥深 ,使宝贵的观测值可继续应用
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  相似匹配句对
     ON THE INITIATION OF DEBRIS FLOW
     泥石流的启动分析
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     ON THE DEBRIS FLOW SCIENCE
     论泥石流学
短句来源
     The Forecasting of Debris Flow
     泥石流预测预报研究进展
短句来源
     Relation and Its Determination of Residual Layer and Depth of Viscous Debris Flow
     粘性泥石流的泥深与残留层关系及其确定
短句来源
     Relationship Between Depth and Residual Layer of Viscous Debris Flow
     粘性泥石流残留层与泥深的关系分析
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According to physical features of debris flow In Jiangjia Ravine the balance expression of forces of moving debris folw is wretten asFrom it characteristic parameters of moving debris flow are selected as Uc,Hc,pc,and U., U = (Hc g Ic)1/2. So movement function of debris flow is established asf(Uc, Hc,γy,pc, U)= 0. Through dimension analysis, the velocity relation of debris flow is-obtained asWhere Ucis he surface velocity,γyis the lost Specloalm gravity of soll in debris flow,Hcis the depth of debris flow,...

According to physical features of debris flow In Jiangjia Ravine the balance expression of forces of moving debris folw is wretten asFrom it characteristic parameters of moving debris flow are selected as Uc,Hc,pc,and U., U = (Hc g Ic)1/2. So movement function of debris flow is established asf(Uc, Hc,γy,pc, U)= 0. Through dimension analysis, the velocity relation of debris flow is-obtained asWhere Ucis he surface velocity,γyis the lost Specloalm gravity of soll in debris flow,Hcis the depth of debris flow, g is the acceleration of gravity,π is the dimensionlessm product of the characteri stic parameters, γcis the special gravity of debris flow, and Icis the gradient of bed. The π of debris flow in Jiangjia Ravine is determined by flow experiments in a flume. Checking up with data obtained from modelling test and field observation, the empirical relation of surface velocity of debris flow is gutie accorded wth practical cases. It seems to be reflection of movement law of debris flow in Jiangjia Ravine.

根据蒋家沟泥石流体的物理特征,建立泥石流运动力学方程,用因次分析法导出泥石流流速公式的无因次乘积表达式。通过蒋家沟泥石流流动试验,确定其无因次乘积数,得出蒋家沟泥石流表面流速公式为Uc=Vy Hc~(1/2)g~(1/2)/2.405 Vc Ic~(1/2),Uc为泥石流表面流速,Vy为泥石流中土体的损失容重,g为重力加速度,Yc为泥石流体容重,Ic为河床纵坡。模型试验和原型观测所测得的流速与按试验公式计算的流速对比,其误差分别为1.0—4.5%和1.0—14.5%。由此表明,试验得出的表面流速公式符合实际情况,反映了蒋家沟泥石流运动规律。

Some Sediment dam foundations were surpended and even broken under scouring and lateral erosion from debris flows. During 1973-1976, 65% in sediment dams broken by debris flows in Sichuan Province suffered from hanging of foundation. So the burial depth of sediment dam foundation should be paid attention. The following aspects should be considered.1.The depth of debris flow scouring hole h1h1 is decided by dam height Z.unit discharge of debris flow q (Table 1) and the natures of debris...

Some Sediment dam foundations were surpended and even broken under scouring and lateral erosion from debris flows. During 1973-1976, 65% in sediment dams broken by debris flows in Sichuan Province suffered from hanging of foundation. So the burial depth of sediment dam foundation should be paid attention. The following aspects should be considered.1.The depth of debris flow scouring hole h1h1 is decided by dam height Z.unit discharge of debris flow q (Table 1) and the natures of debris flow deposits at dam foundation, etc. In Hunshui Ravine of Yingjiang County,Yunnan Province,there is 1# sediment dam,Z = 6. 0m,the burial depth of the foundation is only 2. 0m, the dam body is on old debris flow deposits. When the debris flow passes,q=12-16m3/(s·m), h1=3. 0-5. 0m,the dam body will be in denger. In the debris flow gullies at Heisha River of Liangshan,Sichuan Province,if Z-5. 0-10. Om,on old debris flow deposits hi would be 1/2 of Z,on new debris flow deposits h1 would be 2/3 of Z.2.The variation of the gully-bed gradient1)The gully-bed gradient at the lower reaches of sediment dam will get gentle while the grain size is fine. After the gradient getting gentle,the emerged depth of sediment dam foundation h2=/",(i0-i1),where L is the gully, length from local erosion basis (the junction of main and branch gullies) to dam sitej i0 is original gully-bed gradients i1 is the gully-bed gradient to be flatted (Fig. 1). During 1980-1984,more than 20 sediment dams had been built in the debris flow gully at Sanjiacun of Lianghe County,Yunnan Province. i0=15-20%,i1 = 5-7%. Among them,4 sediment dams.A2 = 0. 6-0. 7m. 2)After channel cutoff,the gully-bed gradient will be more steep. For example,in this caes,a sediment dam in Jiangjia Ravine of Dongchuan,Yunnan Province was broken while h2= 4. 0m.3.Lowering of the local erosion basis (the junction of main and branch gullies)1)The junction will get to lower relatively, if the debris flow channel on the accumulated fan was turned to the lower reaches of the main gully. The altitude of the old junction of Hunshui Ravine is at 968m; a large debris flow in 1974 turned the junction to the lower reaches of the main gully,the altitude of new junction is at 958m (Fig. 2). Headward erosion is up to 1# sediment dam, h2 = 6. 0-7. 0m. 2)The junction lowered because the main gully cut down. For example, at the junction of Hunshui Ravine, it lowered from 961m in 1978 to 953m in 1986 (Table 2). Headward erosion is to a flow-measuring flume,h2=6. 0m.For reason given,the discussed problems will help to correctly determine the burial depth of sediment dam foundation.

川滇两省某些泥石流拦沙坝基础遭泥石流掏蚀、侧蚀后,造成悬空,以至溃坝。因此拦沙坝基础埋深问题值得引起重视,这应考虑如下几点:1.泥石流冲刷坑深度;2.沟床纵坡的变动,含沟床纵坡的变缓和变陡;3.局部侵蚀基准面(主支沟汇合处)的下降,含汇合处改至主沟下游而呈现的相对下降和主沟下切而使汇合处下降。这些造成拦沙坝基础出露深度0.7—7.0米,基础埋深至少要考虑此值。

Resistance of debris flow ( n ) calculated from Manning formnla has a property that n value increases with the depth of debris flow adding.The phenomena can be reasonable explained by the total weight of unit width soil particles increasing whty the depth of debris flow adding. The resistance ( n value) varies in different watersheds,and some difference values even reach up to four times.The result can not well explained by the difference of the riverbed roughness in the different watershed,because...

Resistance of debris flow ( n ) calculated from Manning formnla has a property that n value increases with the depth of debris flow adding.The phenomena can be reasonable explained by the total weight of unit width soil particles increasing whty the depth of debris flow adding. The resistance ( n value) varies in different watersheds,and some difference values even reach up to four times.The result can not well explained by the difference of the riverbed roughness in the different watershed,because the viscous debris flow have a pavement on the bed and result in the difference of the bed not great in different watershed.Under the inspiring of only“bottom mud layer”and “inverse grading”existing in depositional profile of debris flow,the author thinks that the coarser particles will move upward the top layer by the acting of shear_colliding force in the motion of the debris flow,and result in more fine materials remained on the bottom bed,and the force decrease as the depth of debris flow adding.According to the above results,we assume a vertical distribution function of coarse and fine particle ratio,and the resistance lawd of the viscous debris flow between Jiangjia Gully and Wudu county which n values differ two times are integrated to the function.

用曼宁公式分析泥石流阻力时 ,不同地区和不同流域之间的糙率n值相差很大 ,即是同一条沟的n值也很分散。若考虑单宽固体物质重量和粗、细颗粒含量之比沿垂线分布的不均匀性之后 ,则使单沟的n值点群分布趋于集中 ,且能将不同泥石流沟相差数倍的n值用统一的表达式加以描

 
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