The Effects of Geometry and Wetted Perimeter on Surface Irrigation Infiltration
Publication: World Environmental and Water Resources Congress 2008: Ahupua'A
Abstract
One of the lingering questions in surface irrigation is the relationship between the one-dimensional infiltration associated with borders and basins and the two-dimensional infiltration associated with furrows. A corollary question is the effect of flow variations on furrow infiltration. Definitive answers to these questions would resolve several important evaluation and design issues. For instance, if such relationships were known, a simple field evaluation of a furrow would provide much of the data necessary for border and basin design and management. Or, having this relationship would allow a planner to evaluate the comparative advantages and disadvantages of borders, basins, and furrows within the context of the same system. In 2004 the USDA-NRCS intake families were redefined on the basis of initial furrow irrigations. Later in 2006 the hydraulic properties of these families were determined by parametrically matching HYDRUS 2D (Šimůneck, et al., 1999) simulations to the cumulative infiltration predicted for each family curve. In this paper, the effects of varying wetted perimeter are evaluated in two contexts: (1) how wetted perimeter variations in furrow irrigation can be simulated; and (2) how the two-dimensional furrow intake can be converted to the one-dimensional border or basin cases.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Basins
- Bodies of water (by type)
- Dams
- Design (by type)
- Engineering fundamentals
- Furrow irrigation
- Geometrics
- Geotechnical engineering
- Highway and road design
- Hydraulic engineering
- Hydraulic properties
- Hydrologic engineering
- Hydrology
- Infiltration
- Irrigation
- Irrigation engineering
- Recharge basins
- Surface irrigation
- Water and water resources
- Water intakes
- Water management
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