| 咸淡水分配比例对盐碱土壤水分入渗特征与脱盐效果的影响 |
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| 引用本文： | 王乃江,高佩玲,赵连东,刘小媛,潘英华.咸淡水分配比例对盐碱土壤水分入渗特征与脱盐效果的影响[J].水土保持学报,2016,30(6):100-105. |
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| 作者姓名： | 王乃江 高佩玲 赵连东 刘小媛 潘英华 |
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| 作者单位： | 1. 山东理工大学农业工程与食品科学学院,山东淄博,255000;2. 山东理工大学农业工程与食品科学学院,山东淄博255000;山东理工大学资源与环境工程学院,山东淄博255000;3. 鲁东大学资源与环境工程学院,山东烟台,264025 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2015ZX07203-007)，山东省自然科学基金项目(ZR2016EEM34)，国家级大学生创新创业训练项目(201510433047) |
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| 摘 要： | 以黄河三角洲重度盐碱化土壤为研究土样,在室内对其进行垂直一维积水入渗试验,研究5种咸淡水分配比例下累积入渗量、湿润锋深度和入渗率随时间的变化规律及灌溉后土壤脱盐深度、脱盐率。结果表明:(1)首轮微咸水入渗结束后,第二轮淡水灌溉的过程中,在同一时间,与全部微咸水灌溉相比,累积入渗量、湿润峰深度和入渗率均产生了明显的下降,并且淡水灌水量越多,下降的幅度越大,但其仍显著大于全部淡水灌溉;(2)累积入渗量与湿润锋深度呈良好的线性关系,回归方程的决定系数R2均大于0.99;与Green-Ampt模型和Philip模型相比,Kostiakov公式更适于描述入渗率与时间的关系;(3)咸淡水分配比例对土壤脱盐深度影响较小,但对脱盐深度内的脱盐率影响显著,在一定深度范围内,咸、淡水先后灌溉下土壤脱盐率远远大于全部微咸水灌溉,与全部淡水灌溉差异较小,但随着土层深度的继续增加,其土壤脱盐率明显小于全部淡水灌溉,与全部微咸水灌溉基本一致。
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| 关 键 词： | 重度盐碱化土壤 咸淡水分配比例 土壤水分入渗特征 土壤脱盐效果 黄河三角洲 |
Influence of Distribution Proportion between Brackish and Fresh Water on Water Infiltration Characteristics and Desalting Effect in Saline-Alkali Soil |
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| WANG Naijiang,GAO Peiling,ZHAO Liandong,LIU Xiaoyuan,PAN Yinghua.Influence of Distribution Proportion between Brackish and Fresh Water on Water Infiltration Characteristics and Desalting Effect in Saline-Alkali Soil[J].Journal of Soil and Water Conservation,2016,30(6):100-105. |
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| Authors: | WANG Naijiang GAO Peiling ZHAO Liandong LIU Xiaoyuan PAN Yinghua |
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| Institution: | 1.School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000;2.School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255000;3.School of Resources and Environmental Engineering, Ludong University, Yantai 264025 |
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| Abstract: | Taken the severe saline-alkali soil of the Yellow River Delta as research soil sample, vertical one-dimensional ponding infiltration experiments were conducted in the laboratory to study the change laws of cumulative infiltration, wetting front depth and infiltration rate with time, soil desalting depth, and desalting rate after irrigation under five distribution proportions between brackish and fresh water. The results showed that: (1) After the first round of brackish water infiltration finished, compared with all brackish water irrigation at the same time, cumulative infiltration, wetting front depth and infiltration rate obviously declined after the second round of fresh water irrigation, in addition, the more fresh water used for the irrigation, the more obviously these parameters declined, but these parameters were still significantly higher than those for all fresh water irrigation. (2) Cumulative infiltration had good linear relationship with wetting front depth, with all coefficients of determination of regression equations being greater than 0.99. Kostiakov formula was more suitable for describing the relationship between infiltration rate and time than Green-Ampt model and Philip model. (3) Distribution proportion between brackish and fresh water had slight effect on soil desalting depth, but it had significant effect on desalting rate within soil desalting depth. Soil desalting rate under successive brackish and fresh water irrigation was far greater than all brackish water irrigation and was slightly different from that under all fresh water irrigation within a certain depth range, but it was obviously less than that under all fresh water irrigation and essentially equal to that under all brackish water irrigation when soil layer depth further increased. |
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| Keywords: | severe saline-alkali soil distribution proportion between brackish and fresh water infiltration characteristics of soil water soil desalting effect Yellow River Delta |
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