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For.ulation and Its Ver.fication of Conductivity for.Unifor. Tur.id Water

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china Ocean engineering 2000年第2期15卷 255-260页

作者：苏杭丽卢永生 p.. D.， college of harbor， waterway and coastal engineering， Hohai Univer.ity， nanjing 210098， p. r. china professor， college of harbor， waterway and coastal engineering， Hohai Univer.ity， nanjing 210098. p. r. china

For.measur.ment of sediment sp.tial concentr.tion of near.hor. seawater. a tur.id water.system with sever.l. kinds of p.r.icles is investigated fr.m the viewp.int of the char.cter.stics of p.r.icles. Fir.tly, the classical p.ysical and chemical conductivity for.ula is extended to macr.-p.r.icle (such as sand) conductivity for.ula. Secondly, the Fr.cke for.ula suitable for.only one kind of p.r.icles is extended to the conductivity for.ula suitable for.sever.l kinds of p.r.icles.. Finally, the multi-p.r.icle conductivity for.ula is ap.lied to the measur.ment of sediment sp.tial concentr.tion.

关键词： conductivity multi-p.r.icle tur.id water

Calculation of Diver.ion r.tio of the Nor.h Channel in the Yangtze Estuar.

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china Ocean engineering 2000年第4期15卷 525-532页

作者：严以新高进茅丽华郑金海 p.. D. Professor College of Harbour Waterway and Coastal Engineering Hohai University Nanjing 210098P. R. China Associate professor Dept. Civil Engineering Xiangtan College of Technology Xiangtan 411201 P. R. China Engineer College of Harbour Waterway and Coastal Engineering Hohai University Nanjing 210098 P. R. China p.. D Lecturer College of Harbour Waterway and Coastal Engineering Hohai University Nanjing 210098P. R. China

The cir.umfluence ar.und the Jiuduan Sandbank is thor.ughly studied by means of the p.incip.e of least r.sistance in fluid dynamics. The diver.ion r.tio of the Nor.h Channel for.1998 is calculated, which is almost the same as the field sur.ey data. The nor.al and minimum diver.ion r.tios of the Nor.h Channel after.stages I , II and III r.gulation wor.s as well as the futur. p.ase ar. obtained. The numer.cal r.sults and p.edicted value ar. accur.te.

关键词： Yangtze Estuar. Nor.h Channel cir.umfluence ar.und sandbank p.incip.e of least r.sistance diver.ion r.tio r.gulation

Exp.r.mental Study on Scour. Downstr.am of Floodgates

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china Ocean engineering 2000年第2期15卷 243-254页

作者：张玮陈锡林徐金环李国臣王志谦 p.. D.， professor， college of harbor， waterway and coastal engineering， Hohai Univer.ity， nanjing 210024，p. r. china Senior.Engineer. Hydr.logy and Water.r.sour.es Bur.au of p.ovince Jiangsu， nanjing 210005， p. r. china Associate professor. college of harbor， waterway and coastal engineering， Hohai Univer.ity， nanjing 210024，p. r. china professor， college of harbor， waterway and coastal engineering， Hohai Univer.ity， nanjing 210024，p. r. china Master.Student， Hohai Univer.ity， 210024 nanjing， p. r. china

The r.ver.r.ach downstr.am of a floodgate at the estuar. of the Xinyihe r.ver.is about 1.3km long, and the r.ver.ed is comp.sed of clotty clay. In the exp.r.ment, soil samp.es ar. taken fr.m the constr.ction site, and the incip.ent velocity is deter.ined in a labor.tor. flume, and it is used to design the scour.model and to select model sand mater.al. The exp.r.mental r.sults show that scour. below the floodgate is unavoidable due to lar.e dischar.e and Low tidal level. Scour. is caused by two factor.: the r.p.d flow p.ssing though the floodgate and the water.dr.p.near.the r.ver.mouth dur.ng low r.de, and the scout below the floodgate is mor. cr.tical to the str.ctur.l design. It is suggested that anti-scour.walls should be used instead of r.p.ap. The ideas and methods adop.ed in the exp.r.ment can be used as r.fer.nce in the study on r.ver.scout under.similar.conditions.

关键词： movable bed model r.ver.scour incip.ent velocity