降雨入渗补给地下水计算公式

降雨入渗补给地下水计算公式

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
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yue@lreis.ac.cn
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Method-focused categoriesProcess-perspectivePhysical process calculation

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降雨入渗补给地下水计算公式

(1)达西定律:

          q=ƒP=-K(θ)(Φ21)/(Z2-Z1)

式中,K(θ)为非饱和水传导系数;Φ为总水头;Z为地面以下距离;Z2-Z1=LS,如果地表水头Φ1=0,则Φ2=-(LS1+h);h为湿润锋面处的负压力。

(2)地表径流开始前的入渗总量:

                 Fb=h(θs-θ0/A/KS-1

式中,KS为饱和水传导系数;θS为与土壤性质有关的常数;A为雨强。

(3)地表产流开始时间:

                T=

(4) 累计入渗量:

                F=ƒ(p,A)

式中,P为降雨量;A为强度。假设该函数为线性关系,可写为:F=a+bP+cA。式中a,b,c为待定的系数,根据最小二乘法的原理可计算出。

5)补给地下水量:

                   Fg=F-(θ-θ0L

     如用土壤含水量表示,则:

          Fg=F-(ρ-ρ0·r·L/10

式中,θ为田间持水量;Fg为降雨入渗补给地下水;ρ为田间持水;ρ0为土壤初始含水率;r为土壤容量。

任鸿遵,杨克定:平原地区降水入深不及地下水的模拟实验研究方法。地理研究,1982,2(4)

How to Cite

《资源环境数学模型手册》 (2018). 降雨入渗补给地下水计算公式, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/f9634d4f-19f0-470e-b578-bd1981bd6b0a
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Last modifier : 
Zhiyi Zhu
Last modify time : 
2020-11-14
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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? Feedback

History

Last modifier : 
Zhiyi Zhu
Last modify time : 
2020-11-14
Modify times : 
View History

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