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坡面降雨侵蚀和径流侵蚀研究-水土保持通报
18 6 Vol. 18 No. 6
1998 12 Bullet in of Soil and Water Conservat ion Dec. , 1998
*
郑粉莉
( 7121 )
,
,
: ,
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, 1 , 5 % ;
27. 2% 45. 8% ,
: 157. 1
S
:
A Study on Rainf all Erosion and Runof f Erosi on
Zheng Fenli
(I nstitute of Soil and Water Conserv ation, the Chinese A cad emy of S ciences and M inistry of
, , , 7121 , )
Water Resources Yangling D istrict Shaanx i P rov ince PR C
Abstract Rainfall erosion process can be divided into 2 different aspects, runoff w ashing
,
and raindrop impact but their contribution to soil erosion can not be determined accurately
under the condition of conventional rainfall simulation w ith single runoff plot Relationships.
betw een rainfall erosion and runoff erosion and their contribution to soil erosion have been
researched by using rainfall simulation w ith dual runoff plots. T he research results show
that under the same slope gradient and rainfall intensity , the sediment delivery in down-slope
- -
caused by runoff w ater from up slope w ill increase w ith the increase of runoff w ater from up
slope. Under the condition of same slope steepness and runoff, sediment delivery caused by
rainfall erosion is bigger than that caused by feeding runoff w ashin
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