Effect of micro-dams on water flow characteristics in furrow irrigation

Surface irrigation, particularly furrow irrigation, is the most common method of water application into agricultural lands. Despite all its advantages, furrow irrigation has some demerits, such as a potential large volume of runoff losses. In this research, an approach was proposed to reduce runoff...

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Veröffentlicht in:Irrigation science Jg. 38; H. 3; S. 307 - 319
Hauptverfasser: Keshavarz, Mohammad Sadegh, Ebrahimian, Hamed, Abbasi, Fariborz, Playán, Enrique
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2020
Springer Nature B.V
Schlagworte:
agricultural colleges
Agricultural land
Agricultural management
Agriculture
Aquatic Pollution
Biomedical and Life Sciences
Climate Change
Dams
Environment
farms
Field tests
Flow characteristics
Furrow irrigation
Furrows
Infiltration
Inflow
Iran
Irrigation
Life Sciences
Natural resources
Original Paper
Runoff
soil
Soil conservation
Soil water
Soils
summer
Surface irrigation
Sustainable Development
Volume transport
Waste Water Technology
Water
Water conservation
Water flow
Water Industry/Water Technologies
Water Management
Water Pollution Control
Iran
ISSN:0342-7188, 1432-1319
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Zusammenfassung:Surface irrigation, particularly furrow irrigation, is the most common method of water application into agricultural lands. Despite all its advantages, furrow irrigation has some demerits, such as a potential large volume of runoff losses. In this research, an approach was proposed to reduce runoff losses and to improve water flow characteristics by creating micro-dams, barriers inside the irrigated furrows. To control water flow and increase infiltration into the soil, experimental micro-dams were created at distances of 10 and 20 m, with a height of 5 cm. Field experiments were conducted at the research farm of the College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran in summer of 2018. Two erosive inflow rates (0.6 and 0.9 L/s) were considered. Furrow length and spacing were 100 and 0.75 m, respectively. Results indicated that micro-dams increased the advance time, leading to increased infiltration. Micro-dams also increased the recession time, due to the increase in overland water volume. Moreover, results showed that in treatments with micro-dams, runoff was reduced by up to 45.3% in comparison to the control treatment. The change in furrow cross-sectional area during the irrigation event was also reduced. Micro-dams showed a great potential to reduce irrigation runoff losses, and should be considered as a management practice aiming at water and soil conservation.
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ISSN:0342-7188
1432-1319
DOI:10.1007/s00271-020-00674-3