Some features of the ASCE Shopping cart and login features of the website will be down for maintenance on Sunday, June 16th, 2024, beginning at 12:00 A.M. ET and ending at 6:00 A.M. ET. During this time if you need immediate assistance at 1-800-548-2723 or [email protected].

Chapter
Apr 26, 2012

Estimate Irrigation Water Use by Data Assimilation

Publication: World Environmental and Water Resource Congress 2006: Examining the Confluence of Environmental and Water Concerns

Abstract

Water use is usually metered in municipal and industrial sectors but not in agriculture. The survey data of irrigation water use are highly variable in quality, depending on reporting requirements at the level of the state, the watershed, or the irrigation project. In hydrologic-agronomic models, irrigation is either treated as an estimated fixed input or determined by the model through certain prescribed empirical criteria. This paper presents an approach for estimating irrigation water use based on a hydro-agronomic model (Soil Water Atmosphere Plant model — SWAP) and crop evapotranspiration (ET) assessed from remote sensing utilizing the data surface energy balance algorithm for land. A coupled forward-inverse procedure is implemented for the analysis. The forward procedure is to assimilate the ET estimation into the hydro-agronomic model through the ensemble Kalman filter, which is an efficient data assimilation method for complex nonlinear dynamic models. The inverse procedure is to search irrigation scheduling using a genetic algorithm (GA). The two procedures are tightly coupled through the objective function, which is based on the likelihood function assessed from the data assimilation framework by maximizing the joint distribution of all "observed" crop ET. The forward-inverse framework incorporates model errors and observation errors, which allows the assessment of the inaccuracy of the irrigation estimate. The soil hydraulic properties of the case study area, which are the most sensitive parameters of the SWAP model, are estimated by genetic algorithm based on the available soil survey data and the in-site soil moisture measurement in a grass land.

Get full access to this chapter

View all available purchase options and get full access to this chapter.

Information & Authors

Information

Published In

Go to World Environmental and Water Resource Congress 2006
World Environmental and Water Resource Congress 2006: Examining the Confluence of Environmental and Water Concerns
Pages: 1 - 12

History

Published online: Apr 26, 2012

Permissions

Request permissions for this article.

ASCE Technical Topics:

Authors

Affiliations

Dingbao Wang [email protected]
Ven Te Chow Hydrosystems Laboratory, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801. E-mail: [email protected]
Ven Te Chow Hydrosystems Laboratory, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801. E-mail: [email protected]

Metrics & Citations

Metrics

Citations

Download citation

If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.

Cited by

View Options

Get Access

Access content

Please select your options to get access

Log in/Register Log in via your institution (Shibboleth)
ASCE Members: Please log in to see member pricing

Purchase

Save for later Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.

Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
ASCE Library Card (5 downloads)
$105.00
Add to cart
ASCE Library Card (20 downloads)
$280.00
Add to cart
Buy Single Paper
$35.00
Add to cart

Get Access

Access content

Please select your options to get access

Log in/Register Log in via your institution (Shibboleth)
ASCE Members: Please log in to see member pricing

Purchase

Save for later Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.

Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
ASCE Library Card (5 downloads)
$105.00
Add to cart
ASCE Library Card (20 downloads)
$280.00
Add to cart
Buy Single Paper
$35.00
Add to cart

Media

Figures

Other

Tables

Share

Share

Copy the content Link

Share with email

Email a colleague

Share