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Effect of Slope on Water Balance Under Center‐Pivot Irrigation
Author(s) -
Hanna A. Y.,
Harlan P. W.,
Lewis D. T.
Publication year - 1983
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1983.03615995004700040030x
Subject(s) - surface runoff , environmental science , soil water , evapotranspiration , infiltration (hvac) , water balance , hydrology (agriculture) , irrigation , drainage , growing season , precipitation , soil science , agronomy , geology , geography , ecology , geotechnical engineering , meteorology , biology
The effects of slope on soil water storage and other water balance components under center‐pivot irrigation were studied in Gage County, Nebraska. Soil water, surface runoff, precipitation, and irrigation were measured for soils of low infiltration on slopes of 2, 4, and 8% under corn ( Zea mays L.). Evapotranspiration was calculated. Soil water content (0‐ to 137‐cm depth) during the growing season was higher in soils on 8% slopes than in soils on slopes of 2 and 4%. Runoff from all slopes was not associated with sprinkler irrigation in the crop production system studied. As slope increased, surface runoff caused by rain increased, and internal drainage beyond the 137‐cm depth decreased at approximately the same rate. The overall water depletion during the growing season was not significantly affected by slope.