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Monitoring irrigated land acreage using Landsat imagery: an application example

Open-File Report 76-630

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Abstract

A demonstration of the utility of Landsat imagery for quickly and cheaply estimating irrigated land area was conducted in the Klamath River basin of Oregon. Landsat color composite images, at 1:250,000 scale and acquired on two dates during the 1975 growing season, were interpreted. Irrigated lands were delineated manually, and the irrigated area was estimated, based on dot-grid sampling of the manually delineated lands. The image interpretation estimate of irrigated area was then adjusted by a comparison of interpretation results with ground data on 45 sample plots, each 1 mi 2 (2.6 km2 ) in size.

Two interpreters independently estimated the irrigated area.  Their adjusted estimates were 285,000 acres (115,000 ha) and 267,000 acres (108,000 ha) respectively, with corresponding 95 percent confidence intervals of +19,500 acres (7,880 ha) and +34,700 acres (14,000 ha). The estimated cost of the survey, exclusive of management costs and training, was $1,500.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Monitoring irrigated land acreage using Landsat imagery: an application example
Series title:
Open-File Report
Series number:
76-630
Year Published:
1976
Language:
English
Publisher:
U.S. Geological Survey
Description:
iv, 25 p.
Country:
United States
State:
Oregon
Other Geospatial:
Crater Lake, Klamath Lake
Online Only (Y/N):
N
Additional Online Files (Y/N):
N