Modeling the effects of different irrigation water salinity on soil water movement, uptake and multicomponent solute transport
Modeling the effects of different irrigation water salinity on soil water movement, uptake and multicomponent solute transport
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DOI：
10.1016/j.jhydrol.2015.09.070
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发表时间：
2015-11
影响因子：
6.4
通讯作者：
E. Lekakis;V. Antonopoulos
中科院分区：
文献类型：
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作者：
E. Lekakis;V. Antonopoulos
模拟模型可以成为分析和管理灌溉、土壤盐碱化或作物生产问题的重要工具。在这项研究中的数学模型，描述了水的运动和质量运输的个别离子（Ca 2+，Mg 2+和Na+）和整体土壤盐分的土壤溶液电导率的装置，使用。将Ca ~（2+）、Mg ~（2+）和Na ~+的质量迁移方程作为WANISIM模型的一部分，并将土壤盐分计算为单个离子的总和。该模型进行了校准和验证，对现场数据，在为期三年的实验中收集的玉米地块，灌溉三种不同的灌溉水质，在希腊北方塞萨洛尼基地区。该模型还用于评估盐碱化和钠化危害，方法是使用电导率增加为0.8、3.2和6.4 dS m−1的灌溉水，同时保持Ca 2+：Mg 2+：Na+= 3：3：2。结果评价的定性和定量程序表明，在0-35和35-75 cm两个土层中，土壤含水量、总盐分和单个可溶性阳离子浓度的模拟值与实测值之间具有良好的一致性。营养吸收也被考虑在内。当地可用的灌溉水（ECiw= 0.8 dS m−1）不会导致土壤盐碱化或钠化。另一方面，EC = 3.2和6.4 dS m− 1的灌溉水引起严重的土壤盐渍化，但不会引起钠化。冬季的雨水不足以浸出110厘米以下的土壤剖面中的盐分。WANISIM模型的改进版本能够预测沃茨灌溉对土壤和植物生长的影响，适用于水资源稀缺和低质量地区的灌溉管理。
Simulation models can be important tools for analyzing and managing irrigation, soil salinization or crop production problems. In this study a mathematical model that describes the water movement and mass transport of individual ions (Ca2+, Mg2+and Na+) and overall soil salinity by means of the soil solution electrical conductivity, is used. The mass transport equations of Ca2+, Mg2+and Na+have been incorporated as part of the integrated modelWANISIMand the soil salinity was computed as the sum of individual ions. The model was calibrated and validated against field data, collected during a three year experiment in plots of maize, irrigated with three different irrigation water qualities, at Thessaloniki area in Northern Greece. The model was also used to evaluate salinization and sodification hazards by the use of irrigation water with increasing electrical conductivity of 0.8, 3.2 and 6.4 dS m−1, while maintaining a ratio of Ca2+:Mg2+:Na+equal to 3:3:2. The qualitative and quantitative procedures for results evaluation showed that there was good agreement between the simulated and measured values of the water content, overall salinity and the concentration of individual soluble cations, at two soil layers (0–35 and 35–75 cm). Nutrient uptake was also taken into account. Locally available irrigation water (ECiw= 0.8 dS m−1) did not cause soil salinization or sodification. On the other hand, irrigation water withECiwequal to 3.2 and 6.4 dS m−1caused severe soil salinization, but not sodification. The rainfall water during the winter seasons was not sufficient to leach salts below the soil profile of 110 cm. The modified version of modelWANISIMis able to predict the effects of irrigation with saline waters on soil and plant growth and it is suitable for irrigation management in areas with scarce and low quality water resources.