坡面措施减水减沙效益计算模型

坡面措施减水减沙效益计算模型

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contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Classification(s)

Earth System SubjectEarth Surface SystemHydrosphere
Geography SubjectPhysical GeographyHydrology

Detailed Description

坡面措施减水减沙效益计算模型

 

(1)坡面措施减水减沙效益计算:

梯田减洪量计算模型:

式中,M为梯田小区的减洪量;β为梯田有埂率;A为无埂梯田减洪量;B为有埂梯田减洪量。

(2)流域大面积坡面措施减洪减沙量计算:

1)减洪量计算模型:

式中,W流域W小区分别为单项措施在流域和小区的减洪量;F为流域面积,当F3000km2时,n≈0.797

2)流域减沙量计算模型:

设各支流治理前的洪水泥沙关系式为K为系数,α为指数,则“逐步逼近法”计算公式为:

式中,为四大水保措施总减洪量;WH为某支流计算效益年份实测洪水量;WHS为某支流计算效益年份计算洪沙量;n为试算次数。

根据值,按坡面各单项措施的减洪比例求出相应的减沙量。即:

吴永红,李倬,冉大川等;水土保持坡面措施减水减沙效益计算方法探讨。水土保持通报,1998,18(1)

 

How to cite

《资源环境数学模型手册》 (2018). 坡面措施减水减沙效益计算模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/35d54ff2-e985-45df-acc1-3be416437458
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Contributor

contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feed back

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