| Modeling and verification of soil moisture recession curves based on seasonal variation |
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| DOI：10.7606/j.issn.1000-7601.2020.03.07 |
| Key Words: soil moisture recession curve modeling parameter calibration soil type soil moisture forecast Nanyang City |
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| Abstract: |
| Soil moisture data collected between 2011 and 2015 from 12 soil moisture monitoring stationsin Nanyang, Henan, were used to analyze the decreasing pattern of soil moisture content without water input. Based on these data, a soil moisture recession model was constructed and the parameters were calibrated by programming solver. After being examined with soil moisture data from 2016-2017, it was found that the parameters of the model were α=1.023(1-ω2/4353)1/2, α=1.013(1-ω2/7005)1/2, and α=1.008(1-ω2/9303)1/2 for summer, spring\|autumn, and winter, respectively. The results suggested that the proposed model can be used to describe the decreasing pattern of soil moisture for clay and loam soil in farmland for fallow and planting wheat or rice, but not suitable for drought prediction in summer and spring\|autumn for fallow sandy soil. |
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