USING　THE　K_3　ROUGHNESS　COEFFICIENT　TO　MEASURE　THE　SPATIAL　AND　TEMPORAL　VARIABILITY　OF　ROUGHNESS　ON　RIVER　BEDS  

作　　者：Carmen de Jong( B.E.R.G., Institut fur Geographische Wissenschalten, Freie Universitat Berlin, Grunewaldstr. 35, 12165 Berlin, Germany) 

出　　处：《International Journal of Sediment Research》1994年第3期57-64,共8页国际泥沙研究（英文版）

摘　　要：Roughness is measured using a new approach, whereby the relative roughness of the river bed is obtained instead of the conventional grain size distribution. The K3 roughness coefficient allows an accurate description of both spatial and temporal variations of roughness. Detailed variations of roughness may be attributed to both the grain, form and system effects of river reaches. Whereas conventional roughness analyses are limited in space and detail, the K3 roughness coefficient allows undisturbed measurement of the river bed at nearly any scale and locality available.Roughness is measured using a new approach, whereby the relative roughness of the river bed is obtained instead of the conventional grain size distribution. The K3 roughness coefficient allows an accurate description of both spatial and temporal variations of roughness. Detailed variations of roughness may be attributed to both the grain, form and system effects of river reaches. Whereas conventional roughness analyses are limited in space and detail, the K3 roughness coefficient allows undisturbed measurement of the river bed at nearly any scale and locality available.

分 类 号：TV14[水利工程—水力学及河流动力学]