Irrigation data from Castro and Parmer Counties, Texas, 1983-84

Rettman, P.L.; McAdoo, G.D.

doi:10.3133/ofr85699

Cited by 1 publication

(6 citation statements)

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“…Results of the calculated irrigation demand for each year from 1975 through 1984 are presented in table 4. The average difference between irrigagation demands calculated by the Blaney-Criddle method and the field-measured application as collected by Rettman and McAdoo (1986) ranged from 18 percent for soybeans to 37 percent for cotton, and the average for all crop types was 30 percent.…”

Section: Consumptive Use and Irrigation Demandmentioning

confidence: 98%

“…Water application data for separate crops were collected during the 1983-84 irrigation seasons from about 63 irrigation systems in the study area by using portable flowmeters and time-of-operation sensors (Rettman and McAdoo, 1986). This instrumentation was necessary to provide measured data for use in estimating an irrigation pumpage history.…”

Section: Approachmentioning

confidence: 99%

“…Gutentag and others (1984) described in detail the geohydrology of the aquifer. Rettman and McAdoo (1986) collected data on pumpage in Castro and Parmer Counties at 63 sites that were monitored during the 1983 and 1984 irrigation seasons to obtain measurements of discharge and rate of water application to crops. These data were used in making the pumpage calculations used in this report.…”

Section: Previous Studiesmentioning

confidence: 99%

“…Heimes and Luckey (1983) estimated pumpage by using the relationship between the theoretical irrigation demand for individual crops and field-measured pumpage. The field-measured data were collected by monitoring both pumpage and crop acreage for randomly selected irrigation wells for 3 years (Rettman and McAdoo, 1986).…”

Section: Irrigation Pumpagementioning

confidence: 99%

“…11). These data included well yields, hours of operation, fuel consumption, crop type, and irrigated acreage (Rettman and McAdoo, 1986).…”

Section: Field Determinationmentioning

confidence: 99%

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Comparison of irrigation pumpage and change in water storage of the High Plains Aquifer in Castro and Parmer counties, Texas, 1975-83

Mackey¹

1987

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An understanding of the relationship between irrigation pumpage and change in ground-water storage was needed to quantify the amount of water returning to the High Plains aquifer as a result of intensive irrigation in Castro and Parmer Counties, Texas. Irrigation pumpage for the 9-year period, 1975-83, was estimated by using the Blaney-Criddle consumptive-use formula adjusted by a factor to account for irrigation demand and field-measured crop applications. Total estimated pumpage for the 9-year period was 11,269,000 acre-feet and 8,914,000 acre-feet. The estimated pumpage was based upon reported crop acreage data and LANDSAT acreage data, respectively.Aquifer storage for the same period was estimated as the product of specific yield, net water-level change, and area. Change in storage was 5,168,000 acre-feet. Many of the areas of the largest change in storage also were the areas of the largest saturated thickness. The only locations that did not experience substantial water-level declines were the northwest and northeast parts of the study area.A comparison was made of water returning to the aquifer by calculating the difference between irrigation pumpage and the change in aquifer storage. Two estimates of this comparison, expressed as a percentage of irrigation pumpage, were obtained on the basis of two different sources of acreage data. This comparison was 54 percent of pumpage based on reported crop acreage data and 42 percent of pumpage based on LANDSAT interpreted acreage data.

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Section: Consumptive Use and Irrigation Demandmentioning

confidence: 98%

Section: Approachmentioning

confidence: 99%

Section: Previous Studiesmentioning

confidence: 99%

Section: Irrigation Pumpagementioning

confidence: 99%

“…11). These data included well yields, hours of operation, fuel consumption, crop type, and irrigated acreage (Rettman and McAdoo, 1986).…”

Section: Field Determinationmentioning

confidence: 99%