RELATIONSHIP BETWEEN DISCHARGE, VELOCITY AND FLOW AREA FOR RILLS ERODING LOOSE, NONLAYERED MATERIALS

被引:234
作者
GOVERS, G
机构
[1] National Fund for Scientific Research, Laboratory of Experimental Geomorphology, Catholic University of Leuven, Leuven, B-3000
关键词
RILL FLOW HYDRAULICS; FLOW VELOCITY; FLOW ROUTING; TRANSPORTING CAPACITY;
D O I
10.1002/esp.3290170510
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
A relationship between discharge, flow velocity and flow area in rills is established using data from four field and laboratory studies. The proposed relationship is shown to predict successfully flow velocities measured in six other studies. Although slopes range from 0.035 to 0.45 and soil materials range from stony sands over silt loams to vertisols, mean flow velocity can be well predicted from discharge alone. Thus, there is no important influence of slope and/or soil material characteristics on flow velocities in rills. The proposed relationship may be used to improve performance of deterministic flow routing models when applied to rilled catchments. Furthermore, it allows the calculation of unit stream power, which has been shown to be related to the transporting capacity of overland flow, in terms of slope and discharge.
引用
收藏
页码:515 / 528
页数:14
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