农田水分动态模型

农田水分动态模型

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Contributor(s)

Initial contribute: 2018-12-04

Authorship

:  
岳天祥编著
:  
yue@lreis.ac.cn
:  
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Application-focused categoriesNatural-perspectiveLand regions

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农田水分动态模型

 

(1)    农田土壤水量平衡模型:

 

式中,分别为计算时段始末的土壤含水量;为计算时段内的灌溉水量;分别为计算时段内的降水量、蒸散发量、径流量和测向排水量。

 

(2)    蒸散发量模型:

 

式中,为日蒸散发量;为净辐射;为地面温度;为空气温度;为参数。

 

(3)    节水灌溉系统的目标函数模型:

 

式中,为最大收益;为作物单价;为充分供水时的作物产量;为作物供水受限制与无限制时的蒸散发量;为作物缺水影响产量的敏感指数;为灌溉水量;为单位灌溉用水价格;为作物地块划分数;为供水时期划分数;为供水水源,分为地表水、井水和引黄水3种。

 

参考文献:

梁季阳:华北平原节水灌溉的信息管理与实时操作模式。自然资源,1997,1

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《资源环境数学模型手册》 (2018). 农田水分动态模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/04c4a7b6-f8a6-4d7e-a5fb-a28bf0d48fde
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tingxin
Last modify time
2020-10-31
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Contributor(s)

Initial contribute : 2018-12-04

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Authorship

:  
岳天祥编著
:  
yue@lreis.ac.cn
:  
View
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Last modifier
tingxin
Last modify time
2020-10-31
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