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Service Description: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>The South Florida Water Management District uses a modified Blaney-Criddle equation to determine evapotranspiration. This layer displays the polygon feature class that defines the location and extent of areas associated with rainfall monitoring sites used to calculate net depth of application area Districtwide. The point feature class depicts the location of rainfall monitoring sites used to generate rainfall thiessen areas that are then used to calculate net depth of application area District-wide. The Thiessen polygon developed is also part of this web layer. </SPAN></P><P><SPAN /></P><P><SPAN>The 'Modified Blaney-Criddle' is a variation of Blaney Criddle, which multiplies the ET from Blaney-Criddle by a coefficient that relates mean air temperature to the growth stage of a crop. Additionally, effective rainfall is calculated using the mean temperature and hours of daylight, the Blaney-Criddle ET, average monthly rainfall and soil factor. Further calculations consider average rainfall to drought rainfall (1-in-10 year drought). The difference between monthly drought effective rainfall and monthly ET becomes the basis for water allocations.</SPAN></P></DIV>
Map Name: Blaney_Evapotranspiration
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Description: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>The South Florida Water Management District uses a modified Blaney-Criddle equation to determine evapotranspiration. This layer displays the polygon feature class that defines the location and extent of areas associated with rainfall monitoring sites used to calculate net depth of application area Districtwide. The point feature class depicts the location of rainfall monitoring sites used to generate rainfall thiessen areas that are then used to calculate net depth of application area District-wide. The Thiessen polygon developed is also part of this web layer. </SPAN></P><P><SPAN /></P><P><SPAN>The 'Modified Blaney-Criddle' is a variation of Blaney Criddle, which multiplies the ET from Blaney-Criddle by a coefficient that relates mean air temperature to the growth stage of a crop. Additionally, effective rainfall is calculated using the mean temperature and hours of daylight, the Blaney-Criddle ET, average monthly rainfall and soil factor. Further calculations consider average rainfall to drought rainfall (1-in-10 year drought). The difference between monthly drought effective rainfall and monthly ET becomes the basis for water allocations.</SPAN></P></DIV>
Service Item Id: d5b3053d418b484d88c1b918a03324f0
Copyright Text: SFWMD Geospatial Services
Spatial Reference:
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Title: Modified Blaney Criddle Evapotranspiration
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Comments: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>The South Florida Water Management District uses a modified Blaney-Criddle equation to determine evapotranspiration. This layer displays the polygon feature class that defines the location and extent of areas associated with rainfall monitoring sites used to calculate net depth of application area Districtwide. The point feature class depicts the location of rainfall monitoring sites used to generate rainfall thiessen areas that are then used to calculate net depth of application area District-wide. The Thiessen polygon developed is also part of this web layer. </SPAN></P><P><SPAN /></P><P><SPAN>The 'Modified Blaney-Criddle' is a variation of Blaney Criddle, which multiplies the ET from Blaney-Criddle by a coefficient that relates mean air temperature to the growth stage of a crop. Additionally, effective rainfall is calculated using the mean temperature and hours of daylight, the Blaney-Criddle ET, average monthly rainfall and soil factor. Further calculations consider average rainfall to drought rainfall (1-in-10 year drought). The difference between monthly drought effective rainfall and monthly ET becomes the basis for water allocations.</SPAN></P></DIV>
Subject: Blaney Criddle net depth of application, rainfall sites, and rainfall thiessen area.
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Keywords: regulation,consumptive use,permits,regulatory,water supply,agriculture,landscape,irrigation
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