Furrow advance-rate solution for stochastic infiltration properties
A flow-balance equation of surface irrigation is used to solve, section by section, the advance problem on heterogeneous soils. The advance-linear-velocity (ALIVE) solution as a function of time is a sum of exponential terms. Within a section, the properties are uniform, and two linear relationships...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
1994
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/41478 |
| _version_ | 1855539346680053760 |
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| author | Renault, D. Wallender, W.W. |
| author_browse | Renault, D. Wallender, W.W. |
| author_facet | Renault, D. Wallender, W.W. |
| author_sort | Renault, D. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A flow-balance equation of surface irrigation is used to solve, section by section, the advance problem on heterogeneous soils. The advance-linear-velocity (ALIVE) solution as a function of time is a sum of exponential terms. Within a section, the properties are uniform, and two linear relationships between the advance rate x '(t) and the distance x(t) result. The inverse problem is solved step by step, identifying the Horton infiltration law of the studied section from the record of the velocity and the knowledge of the infiltration in the previous sections. Theoretical examples and field experiments are compared. When applying a standard evaluation approach, assuming a uniform infiltration function to an heterogeneous soil misleading results can occur. Perturbations in the advance rate can lead to an incorrect infiltration function when using either the standard ALIVE or Kostiakov-based hydrologic models. However, a nonstandard ALIVE procedure is feasible since the distinction between the sections having different infiltration properties can be detected. To apply the velocity analysis, a high density of advance points is required. |
| format | Journal Article |
| id | CGSpace41478 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1994 |
| publishDateRange | 1994 |
| publishDateSort | 1994 |
| record_format | dspace |
| spelling | CGSpace414782023-06-13T04:52:33Z Furrow advance-rate solution for stochastic infiltration properties Renault, D. Wallender, W.W. furrow irrigation infiltration surface irrigation A flow-balance equation of surface irrigation is used to solve, section by section, the advance problem on heterogeneous soils. The advance-linear-velocity (ALIVE) solution as a function of time is a sum of exponential terms. Within a section, the properties are uniform, and two linear relationships between the advance rate x '(t) and the distance x(t) result. The inverse problem is solved step by step, identifying the Horton infiltration law of the studied section from the record of the velocity and the knowledge of the infiltration in the previous sections. Theoretical examples and field experiments are compared. When applying a standard evaluation approach, assuming a uniform infiltration function to an heterogeneous soil misleading results can occur. Perturbations in the advance rate can lead to an incorrect infiltration function when using either the standard ALIVE or Kostiakov-based hydrologic models. However, a nonstandard ALIVE procedure is feasible since the distinction between the sections having different infiltration properties can be detected. To apply the velocity analysis, a high density of advance points is required. 1994 2014-06-13T14:58:14Z 2014-06-13T14:58:14Z Journal Article https://hdl.handle.net/10568/41478 en Limited Access Renault, D.; Wallender, W. W. 1994. Furrow advance-rate solution for stochastic infiltration properties. Journal of Irrigation and Drainage Engineering, 120(3):617-633. |
| spellingShingle | furrow irrigation infiltration surface irrigation Renault, D. Wallender, W.W. Furrow advance-rate solution for stochastic infiltration properties |
| title | Furrow advance-rate solution for stochastic infiltration properties |
| title_full | Furrow advance-rate solution for stochastic infiltration properties |
| title_fullStr | Furrow advance-rate solution for stochastic infiltration properties |
| title_full_unstemmed | Furrow advance-rate solution for stochastic infiltration properties |
| title_short | Furrow advance-rate solution for stochastic infiltration properties |
| title_sort | furrow advance rate solution for stochastic infiltration properties |
| topic | furrow irrigation infiltration surface irrigation |
| url | https://hdl.handle.net/10568/41478 |
| work_keys_str_mv | AT renaultd furrowadvanceratesolutionforstochasticinfiltrationproperties AT wallenderww furrowadvanceratesolutionforstochasticinfiltrationproperties |