Management of salinity and sodicity in a land FILTER system, for treating saline wastewater on a saline-sodic soil
Management of salinity and sodicity in a land FILTER system, for treating saline wastewater on a saline-sodic soil
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DOI：
10.1071/sr00053
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发表时间：
2001-11
期刊：
影响因子：
1.6
通讯作者：
N. Jayawardane;T. Biswas;J. Blackwell;F. Cook
中科院分区：
文献类型：
--
作者：
N. Jayawardane;T. Biswas;J. Blackwell;F. Cook
FILTER（过滤和灌溉作物用于土地处理和废水再利用）技术的开发是为了提供一个可持续的系统来处理自然产生的盐碱地和/或盐碱地上的含盐污水排放。潜在地，它也可以用来改善由于不适当地在排水受阻的土壤上施用含盐废水而盐化的土壤。FILTER技术包括使用营养丰富的污水灌溉作物，并在潮湿天气和蒸发蒸腾需求低的冬季通过地下排水系统从根区除去多余的水。本文描述了在格里菲斯市议会污水处理厂场地，用于在排水有限的重粘土上施用含盐污水的过滤器地块的盐度和碱度变化。田间试验包括在四个1公顷的地块上进行的试验，为期18个月。测定了过滤前土壤化学特性及其随过滤操作的变化。此外，还监测了所施用的废水和通过土壤的地下排水的体积和化学性质。这些数据被用来解释过滤土壤中盐分和碱度的变化，以及它们对土壤稳定性的潜在影响。提出了降低盐度和碱度的管理方案，以提供一个可持续的系统。
The FILTER (Filtration and Irrigated cropping for Land Treatment and Effluent Reuse) technique was developed to provide a sustainable system for treatment of saline sewage effluent on naturally occurring saline and/or sodic soils. Potentially, it can also be used to ameliorate soils that are salinised by inappropriate application of saline effluent on soils with impeded drainage. The FILTER technique involves using the nutrient-rich effluent for irrigated cropping combined with removal of excess water from the rootzone through a subsurface drainage system, during wet weather and winter periods when evapotranspiration demand is low. This paper describes the changes in salinity and sodicity in FILTER plots used for land application of saline sewage effluent on a heavy clay soil with restricted drainage, at the Griffith City Council sewage works site. The field experiments consist of trials conducted on four 1-ha plots, over an 18-month period. The pre-FILTER soil chemical characteristics and their changes with FILTER operations were measured. In addition, the volumes and the chemical properties of the effluent applied and subsurface drainage water passing through the soil were monitored. These data are used to explain the salinity and sodicity changes within the FILTER soils, and their potential effects on soil stability. Management options to minimise salinity and sodicity to provide a sustainable system are suggested.