小流域林草植被控制土壤侵蚀机理研究-应用生态学报.PDF

2005 9 16 9 CH INESE J OU RNA L OF APPL IED E COL OGY , Sep. 2005, 16( 9)∃1618~ 1622 * 1, 2 1* * 3 1 秦富仓 余新晓 张满良 谢媛媛 ( 1 , 1000 83; 2 , 010019; 3 , 741000) . , , ( b) ( D ) : E ! ( D/ b) 4/ 3; , , ; , . , , , . 100 1- 9332( 2005) 09- 16 18- 05 S7 147 A 1, 2 1 3 Mechanism of watershed soil erosion control by vegetation. QIN Fucang , YU X nx ao , ZHANG M anl ang , XIE 1 1 Yuanyuan ( K ey L abor atory of Soil and Water Conserv at ion and Deser tfi icat ion Com bating of Ed ucat ion Ministry College of Soil and Water Conser v at ion B eij ing For estry Univ ersity B eij ing 1000 83 Ch ina; 2I nner Mongolia Ag ri cult ure Un iv ersity H uhhot 010019; 3 T iansh ui Controlling and S up erv ising B ur eau of Yellow Riv er Soil and Water Conserv ation T ianshui 741000 China) . Chin. J . A pp l. Ecol . , 2005 , 16( 9) : 1618~ 1622 . Fro m the v ew of hydrodynam cs, th s paper stud ed the act ng mechan sm of tr ee, g rass and forest l tter on slope runoff veloc ty and k net c ener gy. T he results show ed that slope runoff head loss w as related to slope grad ent , forest dens ty, net ra nf all ntens ty and slope length . T he relat onsh p of w ater head loss w th the d stance among trees and the d ameter at the ground of tree w as E !( D/ b) 4/ 3. T he grass on slope turned to be cur ved w th s flow ng , and thu s, ncreased th