Discussion of velocity distribution and resistance under ice cover

Author(s):  
Libing Zhang ◽  
Jun Wang ◽  
Yuexia Gao
Author(s):  
Yu Bai ◽  
Guojin Sun

Abstract The problem of agricultural non-point source pollution has become increasingly serious. How to determine the ecological drainage ditch system is one of the effective methods to solve the agricultural non-point source pollution. This research study focuses on the velocity distribution in a two-stage section ecological channel with ice cover. The results show that the two-stage section channel with ice cover can effectively reduce the flow velocity in the channel and increase the retention time of water in the channel. By comparing with the experimental data, the accuracy of the analytical solution is high, which provides a theoretical reference for the transport of sediment and pollutions in a two-stage section channel with ice cover in the future.


1996 ◽  
Vol 40 ◽  
pp. 737-742
Author(s):  
Shoji YAMASHITA ◽  
Yasuro IDE ◽  
Shigeki SAKAI

1995 ◽  
Vol 39 ◽  
pp. 845-848
Author(s):  
Makoto YAMAZAKI ◽  
Suguru KOYAMA ◽  
Ken-ichi HIRAYAMA ◽  
Makoto SUGITA

1999 ◽  
Vol 173 ◽  
pp. 45-50
Author(s):  
L. Neslušan

AbstractComets are created in the cool, dense regions of interstellar clouds. These macroscopic bodies take place in the collapse of protostar cloud as mechanically moving bodies in contrast to the gas and miscroscopic dust holding the laws of hydrodynamics. In the presented contribution, there is given an evidence concerning the Solar system comets: if the velocity distribution of comets before the collapse was similar to that in the Oort cloud at the present, then the comets remained at large cloud-centric distances. Hence, the comets in the solar Oort cloud represent a relict of the nebular stage of the Solar system.


2001 ◽  
Vol 19 (1) ◽  
pp. 1-21 ◽  
Author(s):  
FRANK CHAMBERS ◽  
ABDEL AL-SARKHI ◽  
SHENGHONG YAO

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