| Study on recharge from dry farmland irrigation based on the Hydrus-1D model in Da’an irrigation district |
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| DOI：10.7606/j.issn.1000-7601.2014.02.030 |
| Key Words: Da’an Irrigation District Hydrus-1D model dry farmland irrigation recharge |
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| Abstract: |
| Based on field investigations and data collection, the process of groundwater recharge under irrigation in the dry farmland (maize field) in Da’an Irrigation District in Jilin Province was analyzed using the Hydrus-1D model. The result shows that evapotranspiration dynamic change is evide
nt during the simulation, transpiration is about 2.18 times of evaporation, soil water transpiration loss accounts for about 79.74% of the evapotranspiration consumption in maize growth period, the preponderance is transpiration among evapotranspiration in crop growth season, other time is evaporation; many precipitation and irrigation water infiltrates into soil water under irrigation in the dry farmland, soil water and groundwater transforms quite frequently, water quantity exchange is bidirectional and dynamic, the total groundwater recharge is about 33.63 mm during the simulation , infiltration ratio is 5.21%. the amount is relevant to fine aeration zone medium of study area. This research may offer scientific evidence to schedule reasonable irrigation scheme in dry farmland further. |
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