| Evaluation on backstepping method of infiltration parameters of soil water under furrow irrigation based on the software SRFR |
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| DOI：10.7606/j.issn.1000-7601.2014.04.011 |
| Key Words: soil water infiltration parameter furrow irrigation backstepping method |
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| Abstract: |
| Based on the measured data of furrow irrigation test in Minqin oasis, the Kostiakov model of soil water infiltration was established, and the infiltration coefficient k and infiltration coefficient α were calculated by using backstepping method with the software WinSRFR. The
water flow advance and recession process under bare ground condition with different width of furrow bottom was simulated, and the soil infiltration parameters influenced by moving water head were determined by matching the measured and simulated water flow advance process. According to the relative error (K), root-mean-square error (RMSE) and accuracy of infiltration parameters evaluated by the change process of water depth in different irrigation furrows, it was indicated that the measured results were much coincident with the water flow advance and recession process simulated with the infiltration parameters that were calculated by WinSRFR model. The simulation results of infiltration parameters of soil water under furrow irrigation obtained by backstepping method with the software WinSRFR could meet the accuracy requirements of the test, which greatly reduced the workload in determining infiltration parameters. |
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