Spatio-Temporal Variability of Soil Salinity in Alluvial Plain of the Lower Reaches of the Yellow River-A Case Study

LI Kai-Li; CHEN Jie; TAN Man-Zhi; ZHAO Bing-Zi; MI Shu-Xiao; SHI Xue-Zheng

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Spatio-Temporal Variability of Soil Salinity in Alluvial Plain of the Lower Reaches of the Yellow River-A Case Study

机译：黄河下游冲积平原区土壤盐分的时空变异性研究

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Soil salinity and hydrologic datasets were assembled to analyze the spatio-temporal variability of salinization in Fengqiu County,Henan Province,China,in the alluvial plain of the lower reaches of the Yellow River.The saline soil and groundwater depth data of the county in 1981 were obtained to serve as a historical reference.Electrical conductivity (EC) of 293 surface soil samples taken from 2 km x 2 km grids in 2007 and 40 soil profiles acquired in 2008 was analyzed and used for comparative mapping.Ordinary kriging was applied to predict EC at unobserved locations to derive the horizontal andvertical distribution patterns and variation of soil salinity.Groundwater table data from 22 observation wells in 2008 were collected and used as input for regression kriging to predict the maximum groundwater depth of the county in 2008.Changes in the groundwater level of Fengqiu County in 27 years from 1981 to 2008 was calculated.Two quantitative criteria,the mean error or bias (ME) and the mean squared error (MSE),were computed to assess the estimation accuracy of the kriging predictions.The results demonstrated that the soil salinity in the upper soil layers decreased dramatically and the taxonomically defined saline soils were present only in a few micro-landscapes after 27 years.Presently,the soils with relatively elevated salt content were mainly distributed in depressions along the Yellow River bed.The reduction in surface soil salinity corresponded to the locations with deepened maximum groundwater depth.It could be concluded that groundwater table recession allowed water to move deeper into the soil profile,transporting salts with it,and thus played an important role in reducing soil salinity in this region.Accumulation of salts in the soil profiles at various depths below the surface indicated that secondary soil salinization would occur when the groundwater was not controlled at a safe depth.

机译：收集了土壤盐分和水文数据集，以分析黄河下游冲积平原地区河南省封丘县盐渍化的时空变化。1981年该县盐渍土和地下水深度数据分析了2007年从2 km x 2 km网格和2008年获得的40个土壤剖面中采集的293个表面土壤样品的电导率（EC），并将其用于比较测绘。在未观察到的位置通过EC导出水平和垂直分布模式以及土壤盐分变化.2008年收集了22口观测井的地下水位数据，并将其用作回归克里金法的输入，以预测2008年该县的最大地下水深度。计算了1981年至2008年丰丘县27年的地下水位。两个定量标准，均值误差或均值通过计算n平方误差（MSE）来评估克里格预测的估计准确性。结果表明，在27年之后，上部土壤层的土壤盐分急剧下降，并且分类学定义的盐渍土壤仅出现在少数微景观中目前，含盐量相对较高的土壤主要分布在黄河河床沿线的洼地中。地表盐分的降低对应于最大地下水深度加深的位置。可以得出结论，地下水位的衰退使水得以移动更深的土壤盐分，与盐分一起运输，因此在降低该地区的土壤盐分中起着重要作用。土壤盐分在地表以下不同深度的累积表明，当地下水位不高时会发生次生土壤盐分化。控制在安全深度。

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《土壤圈（英文版）》 |2011年第6期|793-801|共9页
作者
LI Kai-Li; CHEN Jie; TAN Man-Zhi; ZHAO Bing-Zi; MI Shu-Xiao; SHI Xue-Zheng;
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作者单位

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Graduate University of Chinese Academy of Sciences, Beijing 100049 China;

Department of Geography, Jiangsu Institute of Education, Nanjing 210013 China;

School of Water Conservation and Environment, Zhengzhou University, Zhengzhou 450000 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Graduate University of Chinese Academy of Sciences, Beijing 100049 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Spatio-Temporal Variability of Soil Salinity in Alluvial Plain of the Lower Reaches of the Yellow River-A Case Study

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