作 者：
董小慧;张妙仙;王鹏翔;尹玉凤;沈海波;谢文萍
单 位：
中国科学院南京土壤研究所;浙江农林大学环境与资源学院;华东师范大学生命科学学院
关键词：
长江河口地区;稳定流场;电导率;盐分迁移系数模型
摘 要：
通过室内盐分淋洗试验,定期测定剖面电导率,并引入盐分迁移系数K,将土柱分为11个稳定流场,根据物质守恒定律,推导室内土柱盐分迁移系数模型,并利用1stOpt软件进行模型拟合。结果表明,稳定流场条件下,长江河口地区0~40cm土壤逐步脱盐,40~130cm土壤先积盐再脱盐,130~220cm土壤逐步积盐。盐分迁移系数模型拟合相关系数为0.977,决定系数为0.954,均方差为0.039,残差平方和为0.221,可以用来定量描述土壤盐分在稳定流场中的运移变化规律。
译 名：
Study on the Model of Salt Migration Coefficients in Yangtze River Estuary Area
作 者：
DONG Xiaohui;ZHANG Miaoxian;WANG Pengxiang;YIN Yufeng;SHEN Haibo;XIE Wenping;School of Environmental and Resource,Zhejiang Agriculture & Forestry University;School of Life Science,East China Normal University;Institute of Soil Science,Chinese Academy of Science;
关键词：
Yangtze River estuary area;;steady flow condition;;electrical conductivity;;salt migration coefficient model
摘 要：
Laboratory experiments on salt leaching indoor were conduceted to regularly monitor soil electrical conductivity in profiles,and soil profile was divided into 11 steady flow fields by introducing salt migration coefficient K.On the basis of law of conservation of matter,a complex model of salt migration coefficients was constructed,and the model was fitted using 1stOpt software.The results indicated that in the condition of steady flow,soil salt in 0~40cm layer was desalted,soil salt in 40~130cm layer was accumulated firstly and was desalted afterwards,and soil salt in 130~220cm layer was gradually accumulated in Yangtze River estuary area.The correlation coefficient,determine coefficient,average variance and the sum of squared residuals of established model were 0.977,0.954,0.039 and 0.221 respectivelly,and the model could be used to describe the soil salt movement in the steady flow filed.
