| The wetting front distribution characteristic and the fitting model of single point free infiltration under deep pit irrigation in the field |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2010.04.07 |
| Key Words: deep pit irrigation wetting front infiltration |
| Author Name | Affiliation | | LI Tao | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China | | ZHANG Jianfeng | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China | | CHENG Huijuan | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China | | YANG Yanfen | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China | | QIN Tao | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China |
|
| Hits: 406 |
| Download times: 387 |
| Abstract: |
| In order to understand the distribution of wetting front for deep-pit irrigation, the effects of different irrigation and different emitter diameters on wetting front diameter of different levels and depth is studied with the experiment
of infiltration on undisturbed soil. The mainly findings are as follows: The principle of deep-pit irigation is introduced;
In the coarse texture of the original soil, the maximum diameter of horizontal wetting front is usually from about 30 cm to 50 cm in depth, and 200 mm of irrigation device diameter and 30 L of each time irrigation quantity are appropriate. Additionally, the fiting model of a single irrigator is established with clear physical meaning. After preliminary evaluation, the model, with less than 10 % error, proves relatively high accuracy in calculation and a kind of appropriate mathemati-cal form for wetting front distribution of deep-pit irmigation, which will provide an important reference for further research on deep-pit imigation. |
|
|
|