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首页> 外文期刊>International journal of soil science >Evaluation of Soil Colors as Indicators of the Seasonal High Water Table in Coastal North Carolina
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Evaluation of Soil Colors as Indicators of the Seasonal High Water Table in Coastal North Carolina

机译：评价土壤颜色作为北卡罗来纳州沿海地区季节性高水位指标

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On-site wastewater system drainfield trenches must be installed in aerated soil to effectively treat wastewater pollutants. Low chroma (2 or less) soil colors are used as indicators of the seasonal high water table when land is evaluated for determining the installation depth of on-site system drainfield trenches. The study objective was to evaluate how closely low chroma soil colors aligned with measured seasonal high water tables. Soil profile descriptions were performed on 16 sites with 6 different soil series in coastal North Carolina and the depth to low chroma colors was recorded. Groundwater wells were installed at the sites and equipped with automated water level loggers. Water table monitoring was used to determine the depth of the 14-day seasonal high water table between December 2006 and January 2008. The depth to low chroma soil colors and measured seasonal high water table were compared. Results showed that low chroma colors were within 22 cm of the high water table for 75% of sites in sandy loam and sandy clay loam soils, but only 25% of sites in sandy soils. Soil colors were more accurate indicators of the water table on the mainland in relation to barrier islands. More than half (6 of 11) of mainland soils had seasonal high water tables an average of 18 cm closer to the surface than low chroma colors. To help ensure on-site system trenches actually maintain their required separation distance to water table, an increase in separation to low chroma colors is suggested.
机译：必须在充气土壤中安装现场废水系统排水沟，以有效处理废水污染物。在评估土地以确定现场系统排水区沟渠的安装深度时，将低色度（2或更少）的土壤颜色用作季节性高水位的指示。该研究的目的是评估低色度土壤颜色与所测量的季节性高地下水位的接近程度。在北卡罗来纳州沿海地区的6个不同土壤系列的16个地点进行了土壤剖面描述，并记录了低色度颜色的深度。现场安装了地下水井，并配备了自动水位记录仪。通过水位监测来确定2006年12月至2008年1月之间14天季节性高水位的深度。比较了低色度土壤颜色的深度和测得的季节性高水位。结果表明，在砂壤土和砂质壤土中，低色度色度位于高地下水位以下22 cm处，占砂壤土和砂质壤土的75％，而在砂土中只有25％。与障碍岛有关，土壤颜色是大陆地下水位的更准确指标。超过一半（11个中的6个）大陆土壤具有季节性高水位，与低色度颜色相比，平均距地面平均高18 cm。为了帮助确保现场系统的沟渠实际保持其与地下水位的分隔距离，建议增加对低色度颜色的分隔。

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