Simulation study of field water transformation under deficit irrigation with SWAP model
文献类型：EI期刊论文
| 作者 | Song Xianfang; Ma Ying |
| 发表日期 | 2012 |
| 关键词 | Water management Computer simulation Crops Irrigation Models Optimization Percolation (solid state) Plants (botany) Rotation Soil moisture Solvents Water supply |
| 英文摘要 | Deficit irrigation changes the process of field water transformation. Few previous studies discussed the soil water dynamics below the crop root zone and its impact on crop water consumption. In this study, field experiments of winter wheat-summer corn rotation under deficit irrigation were conducted at the typical farmland in Beijing. The process of crop water requirements and water conversion under deficit irrigation were simulated by the SWAP model after calibration and validation. Furthermore, the optimal deficit irrigation modes under the condition of different hydrological years were obtained based on this model. The results indicated that deficit irrigation made crop consumed large amount of soil water. When precipitation and irrigation were small, the soil water consumption could be accounted for 46.1% of crop water consumption. There was obvious soil water exchange between root zone and storage zone with the range of soil water flux from -2.67 to 0.45 mm/d. However, the water flux at the lower boundary of storage zone was small and changed a little. The percolation of the root zone always occurred after irrigation or larger precipitation, and soil water was supplemented from the storage zone upward into the root zone at the critical period of crop water requirement. Compared with conventional irrigation, the optimal irrigation modes could save irrigation water of 375 mm, 225 mm and 225 mm, and the amount of drainage reduced up to 89%, 17% and 2% in the hydrologic years of 75%, 50% and 25%, respectively. |
| 出处 | Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
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| 卷 | 28期:4页:60-68 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/27614]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Song Xianfang,Ma Ying. Simulation study of field water transformation under deficit irrigation with SWAP model. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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