卵石推移质汇入百分数计算的模式

卵石推移质汇入百分数计算的模式

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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卵石推移质汇入百分数计算的模式

     1)基本假定:   

        a)从上述资料表明,卵石岩类组成,决定于补给区地质地貌条件,因此可用各补给区及汇入三峡的卵石岩类百分数,建立计算卵石推移质来源的模式;(b)不同岩类卵石的比重差别不大(约在2.7-3.2),因而不考虑卵石比重不同的运动过程的分选作用;(c)河床上沉积的卵石与运动的卵石两者岩类百分数基本一致;(d)卵石推移质运动过程中的磨损遵循史当贝(H.U.Sternber)公式W=,其中W为卵石颗粒经过距离L以后的重量,L为磨损距离, 为卵石颗粒起始点的重量,α为磨损系数(因岩性不同而异)。

         2)计算方法:

               

   式中,设某流域有m个补给区构成,A补给区卵石岩类百分数为

B补给区卵石岩类百分数为S补给区卵石岩类百分数为

y补给区卵石岩类百分数为,它们汇

入到三峡T点,岩类百分数为;又设A补给区卵石汇入T处的

百分数为B补给区为y补给区为 值求出后,即可知

道各补给区卵石推移质汇入三峡的百分数。

 

参考文献:

        林承坤:长江三峡卵石推移质来源的研究。地理学报,1982,372

      

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How to Cite

《资源环境数学模型手册》 (2018). 卵石推移质汇入百分数计算的模式, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/1b763e01-d0c9-4ad6-a95d-d14e032c8ee3
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zhengzhong
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initial contribute: 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
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Last modifier : 
zhengzhong
Last modify time : 
2020-11-10
Modify times : 
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