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Evaluation of remote sensing of leaf area index for estimating evapotranspiration on irrigated lands. Technical completion report for USGS 104b project 2005ID 54B Item Info

Evapotranspiration is a major component of basin water budgets and consequently knowledge of this feature is essential to studies and planning of water management. For example, in the eastern Snake River Plain, estimates of evapotranspiratjon (ET) were used to represent the consumptive portion of ground water irrigation pumping in calibration of an aquifer model, and in applications of that model to determine effects of pumping upon spring discharge (Cosgrove et aI., 2006). ET estimates are often used in water balance analyses to help determine lesser-known components such as aquifer recharge. Remote sensing can be a valuable tool in estimating evapotranspiration on large scales due to the high areal variability of ET and the difficulty of obtaining crop-mix data for large areas. In previous work, algorithms such as METRIC (Allen et aI., in press, a; Allen et aI., in press, b) and SEBAL (Bastiaansen et aI., 1998) have made use of the thermal band data of satellites such as LANDSAT in energy-balance calculations of ET. However, the continued use of these tools is in jeopardy due to the planned discontinuation of distribution of the thermal band of data from LANDSAT (Allen, 2005 a). Additionally, SEBAL and METRIC require significant expertise and processing time, and rely upon operator selection of "hot" and "cold" pixels. The purpose of this project was to develop and evaluate alternative means of determining the magnitude and areal distribution of irrigated ET, using visible and near-infrared bands fromLANDSAT. The goal of this effort was to identify methods that are: 1. not reliant on thermal-band data, 2. low cost, 3. easily applied and, 4. objective and repeatable.

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Title:
Evaluation of remote sensing of leaf area index for estimating evapotranspiration on irrigated lands. Technical completion report for USGS 104b project 2005ID 54B
Authors:
Contor, B.; Rafn, E.
Date Created (ISO Standard):
2007-06
Description:
Evapotranspiration is a major component of basin water budgets and consequently knowledge of this feature is essential to studies and planning of water management. For example, in the eastern Snake River Plain, estimates of evapotranspiratjon (ET) were used to represent the consumptive portion of ground water irrigation pumping in calibration of an aquifer model, and in applications of that model to determine effects of pumping upon spring discharge (Cosgrove et aI., 2006). ET estimates are often used in water balance analyses to help determine lesser-known components such as aquifer recharge. Remote sensing can be a valuable tool in estimating evapotranspiration on large scales due to the high areal variability of ET and the difficulty of obtaining crop-mix data for large areas. In previous work, algorithms such as METRIC (Allen et aI., in press, a; Allen et aI., in press, b) and SEBAL (Bastiaansen et aI., 1998) have made use of the thermal band data of satellites such as LANDSAT in energy-balance calculations of ET. However, the continued use of these tools is in jeopardy due to the planned discontinuation of distribution of the thermal band of data from LANDSAT (Allen, 2005 a). Additionally, SEBAL and METRIC require significant expertise and processing time, and rely upon operator selection of "hot" and "cold" pixels. The purpose of this project was to develop and evaluate alternative means of determining the magnitude and areal distribution of irrigated ET, using visible and near-infrared bands fromLANDSAT. The goal of this effort was to identify methods that are: 1. not reliant on thermal-band data, 2. low cost, 3. easily applied and, 4. objective and repeatable.
Subjects:
Water budget Evapotranspiration Remote sensing
Location:
Snake River Plain Aquifer; Southern Idaho
Latitude:
42.96
Longitude:
-115.13
Collection:
Boise Basin
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
Idaho Water Resources Research Institute; University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
KIT

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Preferred Citation:
"Evaluation of remote sensing of leaf area index for estimating evapotranspiration on irrigated lands. Technical completion report for USGS 104b project 2005ID 54B", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-2007-06.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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