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首页> 外文期刊>Universal Journal of Environmental Research and Technology >Evaluation of Water Table Dynamics in Relation to Soil Morphological Indicators of Seasonal Wetness
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Evaluation of Water Table Dynamics in Relation to Soil Morphological Indicators of Seasonal Wetness

机译：与季节性湿润的土壤形态指标相关的地下水动态评价

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Soil morphological features such as low chroma (2 or less) soil colors are used as indicators of the seasonal high water table (SHWT) for onsite wastewater system (OWS) design in North Carolina and many other states. OWS drainfield trenches are installed at least 30 cm above the low chroma colors to ensure aerobic conditions for wastewater treatment. The objective of this study was to evaluate the accuracy of low chroma soil colors in predicting the depth of the SHWT for some common soil series in Pitt County, North Carolina. Monitoring wells with automated water level loggers were installed at 7 locations and programmed to record water levels every 0.5 hours during the typical wet season from December 2011 to May 2012. Soil profiles were described, including the depth to low chroma colors, during the installation of the monitoring wells. An automated rain gauge was used to record hourly precipitation. Rainfall and well hydrograph data were used with the weighted rainfall index interpretation method to determine the depth to SHWT. The depth to SHWT was compared to the depth of low chroma colors to assess accuracy. The depths to SHWT were on average 9 ? 26 cm greater than low chroma color depths. However, for 3 of 7 sites, the SHWT was closer to the surface than the low chroma colors. Also, the low chroma soil colors and SHWT depths varied by an absolute value of 20 ? 16 cm. The use of low chroma soil colors for OWS design in some soils may result in less than 30 cm of separation to the actual SHWT, possibly reducing OWS treatment efficiency.
机译：在北卡罗来纳州和许多其他州，现场形态低，色度低（不超过2种）的土壤形态等特征可作为季节性高水位（SHWT）的指标，用于现场废水系统（OWS）设计。 OWS排水沟已安装在低色度颜色上方至少30 cm处，以确保废水处理的有氧条件。这项研究的目的是评估低色度土壤颜色在预测北卡罗来纳州皮特县一些常见土壤系列的SHWT深度方面的准确性。在2011年12月至2012年5月的典型雨季中，使用自动水位记录仪监测的井安装在7个位置，并编程为每0.5小时记录一次水位。描述了土壤剖面，包括从深色度到低色度的深度。监控井。使用自动雨量计记录每小时的降水量。降雨和井水图数据与加权降雨指数解释方法结合使用，确定了SHWT的深度。将SHWT的深度与低色度颜色的深度进行比较，以评估准确性。 SHWT的平均深度为9？比低色度色深大26厘米。但是，对于7个位置中的3个，SHWT比低色度颜色更靠近表面。同样，低色度土壤的颜色和SHWT的深度的绝对值相差20？。 16厘米在某些土壤中将低色度土壤颜色用于OWS设计可能会导致与实际SHWT的距离小于30 cm，这可能会降低OWS处理效率。

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