Estimating actual evapotranspiration from irrigated fields using a simplified surface energy balance approach
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Abstract
Food security assessment in many developing countries, such as Afghanistan, is vital because the early identification of populations at risk can enable the timely and appropriate actions needed to avert widespread hunger, destitution, or even famine. The assessment is complex, requiring the simultaneous consideration of multiple socioeconomic and environmental variables. Since large and widely dispersed
populations depend on rain-fed and irrigated agriculture and pastoralism, large-area weather monitoring and forecasting are important inputs to food security assessments. The Famine Early Warning Systems Network (FEWS NET), an activity funded by the United States Agency for International Development (USAID), employs a crop water balance model (based on the water demand and supply at a given location) to monitor the performance of rain-fed agriculture and forecast relative production before the end of the crop-growing season. While a crop water balance approach appears to be effective in rain-fed agriculture [1,2], irrigated agriculture is best monitored by other methods, since the supply (water used for irrigation) is usually generated from upstream areas, farther away from the demand location.
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | Estimating actual evapotranspiration from irrigated fields using a simplified surface energy balance approach |
| Chapter | 13 |
| DOI | 10.1201/9781420090109 |
| Year Published | 2009 |
| Language | English |
| Publisher | CRC Press |
| Publisher location | Boca Raton, Fl |
| Contributing office(s) | Earth Resources Observation and Science (EROS) Center |
| Description | 14 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Monograph |
| Larger Work Title | Remote sensing of global croplands for food security |
| First page | 317 |
| Last page | 330 |
| Google Analytic Metrics | Metrics page |