Regional Assessment of Soil Water Salinity across an Intensively Irrigated River Valley
Regional Assessment of Soil Water Salinity across an Intensively Irrigated River Valley
复制标题
集约灌溉河谷土壤水盐分区域评估
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
T. Gates
中科院分区：
文献类型：
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作者：
E. Morway;T. Gates
摘要：通过广泛的实地调查，我们可以描述已经灌溉了 120 多年的河谷两个大的代表性区域内的土壤水盐度。盐度问题的性质和严重性是通过数百次现场调查、历时 9 年的数万次测量得出的。所有调查和所有测量地点的土壤水提取物盐度的平均值在上游研究区为 4.1 dS m-1，在下游研究区为 6.2 dS m-1。测量结果的变异性很大，上游变异系数约为 0.51，下游变异系数约为 0.39。还探讨了与土壤和地下水条件的关系，提供了对主要影响因素的实地见解以及作为盐度勘察的一部分测量这些因素的价值。像本文所述的广泛调查可以让人们了解经济损失的严重程度，即作物产量减少，这是由我所造成的……
AbstractExtensive field investigations allowed depiction of soil water salinity within two large representative regions of a river valley that has been irrigated for more than 120 years. The nature and severity of the salinity problem is captured by hundreds of field surveys, encompassing tens of thousands of measurements and spanning 9 years. Soil water extract salinity, averaged over all surveys and all measured locations, is 4.1 dS m-1 in the Upstream Study Region and 6.2 dS m-1 in the Downstream Study Region. Variability over the measurements is substantial, with a coefficient of variation of approximately 0.51 Upstream and 0.39 Downstream. Relationships to soil and groundwater conditions also were explored, providing field-based insights into major contributing factors and into the value of measuring those factors as part of a salinity reconnaissance. A broad survey, like that described herein, affords a sense of the magnitude of economic loss, in terms of crop-yield reduction, that is exacted by i...