英语翻译The typical formula used to determine the necessary volume of water or flow rate to apply is as follows:Gross need= (Net need for ET leaching)/((WAE/100))ET stands for evapotranspiration and is discussed in Section 3.15.The value of WAE m

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英语翻译The typical formula used to determine the necessary volume of water or flow rate to apply is as follows:Gross need= (Net need for ET leaching)/((WAE/100))ET stands for evapotranspiration and is discussed in Section 3.15.The value of WAE m
英语翻译
The typical formula used to determine the necessary volume of water or flow rate to apply is as follows:
Gross need= (Net need for ET leaching)/((WAE/100))
ET stands for evapotranspiration and is discussed in Section 3.15.The value of WAE must account for the DU,evaporation losses,and a reasonable estimate of management (timing).
Example
Find the gross depth that must be applied and the necessary sprinkler gallons per minute.Sprinklers spaced at 40X40 ft.Estimated WAE is 75%.Sprinklers can run for 4 hours and must apply a net of 1.5 in.
Formula
Gross=Net/(WAE/100)
Gpm =(Gross inches)X(Area in square feet)/(Hours X 96.3)
Gross=1.5 in.(75%/100)=2.0 in.needed
Gpm =(2.0X40’X40’)/(4hr.X96.3)=8.3gpm
上面的net会不会是网?因为文中"must apply a net of 1.5 in."这里的是否应该解释为需要有1.5英寸的滤网?

英语翻译The typical formula used to determine the necessary volume of water or flow rate to apply is as follows:Gross need= (Net need for ET leaching)/((WAE/100))ET stands for evapotranspiration and is discussed in Section 3.15.The value of WAE m
net need和gross need相对,前者是净需求量,后面是毛需求量.
试译一下：
确定需水量的常用公式如下：
总需水量＝渗滤所需ET净量/WAE*100
其中ET为蒸发量,数值计算参见3.15部分.WAE（可能是蒸发损失率及估算误差?）值必须包含DU（不知道什么东东?）、蒸发损失及相当的操作估算值.
例题：
请计算所需灌溉系统总深度和每分钟灌溉量.其中灌溉距离40X40英尺.WAE估计值为75%,灌溉系统可以运行4小时,必须使用1.5英寸的净量.
公式：
总量＝净量/损失率*100
Gpm（每分钟灌溉量）＝总量（英寸）*面积（平方英尺）/[时间（小时）*96.3]
需要的总量＝1.5（英寸）/75%*100＝2.0英寸
Gpm＝（2.0*40英尺*40英尺）/（4小时*96.3）＝8.3gpm

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典型的公式来确定必要的水量或流量申请如下：
总需求= （净需要素浸出） / （（ WAE/100 ））
素主张蒸散和3.15节讨论。 WAE的价值必须考虑杜，蒸发损失，合理估计管理（时机）。
例如
找到总值深度必须适用和必要的洒水加仑每分钟。喷头间距40X40英尺预计WAE是75 ％。喷头可以运行4小时，并且必须适用于净的一点五英寸
一级方程式
毛=网/ （ WAE/100 ）
设置gpm = （总英寸） × （区平方英尺） / （小时X 96.3 ）
毛= 1.5英寸（ 75 ％ / 100 ） = 2.0英寸需要
设置gpm = （ 2.0X40 ' X40 ' ） / （ 4hr.X96.3 ） = 8.3gpm
must apply a net of 1.5 in是指必须应用网1.5寸

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仅供参考，也不确定是不是准确～
比较具有象征性的，用来计算必要的水量或水流速的公式如下：
总需求= （净的ET过滤需求） / （（英方/100 ））
ET代表土壤水分蒸发蒸腾损失总量，这部分在第3.15部分讨论过。
WAE的值必须考虑DU，蒸发损失，以及合理的管理估计（定时）
举个例子：
找到适用的总的深度，每分钟必须洒水的加仑数。
洒水装置间距40X40英尺。预计的WAE是75 ％。洒水装置可以运行4小时，并且必须适用一点五英寸的净值。
公式
总重=净/(WAE/100)
每分钟加仑数 =(总英尺数)X(平方英尺面积)/(时间 X 96.3)
总量=1.5 in.(75%/100)=2.0 in. needed
每分钟加仑数=(2.0X40’X40’)/(4hr.X96.3)=8.3gpm

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