小流域泥沙来源及其动态变化的137Cs法

小流域泥沙来源及其动态变化的137Cs法

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Initial contribute: 2018-12-04

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岳天祥编著
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yue@lreis.ac.cn
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小流域泥沙来源及其动态变化的137Cs

(1) 取样剖面处的土壤流失量:

       

式中,X137Cs面积浓度Y137Cs本底值H为犁耕层深度(=15cm)h为土壤年流失厚度(cm)N为取样年份。

(2) 沟间地沟谷裸坡侵蚀相对产沙量的混合模式:

       

式中,Cd为沉积泥沙来源于梁峁坡和沟谷裸坡的137CsCm为沟间地出泥沙的137Cs含量Cg为沟谷裸坡产出泥沙的137Cs含量fm为沟间相对产量沙(%)fg为沟谷裸坡相对产沙量(%);fm+fg=0.91

参考文献:

    文安邦,张信宝:黄土丘陵区小流域泥沙及其动态变化的137Cs法研究。地理学报,1998,53(增刊)

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《资源环境数学模型手册》 (2018). 小流域泥沙来源及其动态变化的137Cs法, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/49137c49-5191-4aaa-a38a-e2a473319037
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tingxin
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Initial contribute : 2018-12-04

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:  
岳天祥编著
:  
yue@lreis.ac.cn
:  
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Last modifier
tingxin
Last modify time
2020-12-21
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