Abstract
Simulation models have been used in a limited fashion to describe and characterize soil water flow in saturated conditions as an approach to optimize drainage design parameters. The dynamic hydraulic behavior of an ideal drain can be characterized by a drain intake resistance factor, solving a two-dimensional equation, including humidity retention functions, by a numerical method based on the finite-element analysis tool, describing time variations of streamline magnitudes and direction, water flow radial velocities, relative soil water content, and pressure head profiles throughout the drainage process. Two drainage pipe extraction areas of 7.85 and were simulated, with the drainage system embedded in a homogeneous and isotropic quartz sand under constant and variable discharge conditions. Simulation results indicate that the water entrance resistance factor must be considered in the design of a drainage network because the hydraulic behavior on the agricultural drain depends on its geometric characteristics.
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Acknowledgments
This study was financed by the National Committee for Scientific and Technological Research (CONICYT) and sponsored by the Company Vinilit S.A. Project No. 7813110015.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 143 • Issue 8 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 27, 2016
Accepted: Dec 13, 2016
Published online: Mar 23, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 23, 2017
ASCE Technical Topics:
- Design (by type)
- Drainage
- Engineering fundamentals
- Flow simulation
- Geomechanics
- Geotechnical engineering
- Hydraulic design
- Hydraulic models
- Hydrologic data
- Hydrologic engineering
- Hydrology
- Irrigation engineering
- Irrigation water
- Models (by type)
- Soil mechanics
- Soil properties
- Soil water
- Water (by type)
- Water and water resources
- Water management
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