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November 24, 2009

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Irving Weather Station
Station Sponsored by : Verizon

Date	ETo PET (in)	Tmax (F)	Tmin (F)	RHmin (%)	Solar (MJm2)	Rain (in)	Wind 4am (mph)	Wind 4pm (mph)
2009-11-10 2009-11-11	0.07 0.06	76 70	55 55	51 56	13.45 12.10	0.00 0.00	0.00 0.00	1.80 0.44
2 Day Summary	0.13	73	55	54	12.77	0.00	0.00	1.12
Note: Reported are the average hourly values, not the absolute highs and lows. 3 day summary \| 5 day summary \| 7 day summary \| other day range Detailed Weather and Heat Units

Crop Water Requirement Calculator

ETo(pet)

ETo value from weather data

(in)

Crop Selection

Select a crop coefficient

FAO Coefficients

Texas High Plains Coefficients

Growth Stage

Select a crop growth stage

Crop Coefficient

Crop coefficient from growth stage

Crop Coefficient =

System Efficiency

Enter your system efficiency

System Efficiency =

(%)

Calculate your total watering requirement

Total Water Requirement (ET) =

(in)

		Precipitation Rate			(in/hr)
		Total Run Time			(min)
		Irrigations/Week			(count)
		Run Time/Irrigation			(min)

Landscape Plant Water Requirement Calculator

ETo(pet)

(in)

Plant Coefficient

Adjustment Factor

Effective Rainfall

Effective Rainfall =

(in)

Total Water Requirement (ET) =

(in)

		Precipitation Rate			(in/hr)
		Total Run Time			(min)
		Irrigations/Week			(count)
		Run Time/Irrigation			(min)

Select Turf Growth Conditions (Step 1)

Sunlight Exposure

Turf Type

Water Requirement for Turf Type (2 Days)

(in)

Precipitation Parameters (Step 2)

Effective Rainfall

(in)

Irrigation Requirement (Water Req. - Rainfall)

(in)

Calculate Watering Run Time (Step 3)

Sprinkler Precipitation Rate

(in/hr)

		Total Run Time			(min)
		Irrigations/Week			(count)
		Run Time/Irrigation			(min)

Select Turf Growth Conditions (Step 1)

Sunlight Exposure

Turf Type

Irrigation Requirement (2 Days)				(in)

Watering Requirement (Water Req. - Rainfall)				(in)

Calculate Watering Run Time (Step 2)

Sprinkler Precipitation Rate

(in/hr)

		Total Run Time			(min)
		Irrigations/Week			(count)
		Run Time/Irrigation			(min)

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The TexasET Network is partially supported through a federal program, the �Rio Grande Basin Initiative,� and administered by the

Texas Water Resources Institute of the Texas A&M University System, Cooperative State Research, Education and Extension Service, U.S.

Department of Agriculture under Agreement No. 2005-34461-15661 and Agreement No. 2005-45049-03209.