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首页> 外文会议>Annual International Meeting of the American Society of Agricultural and Biological Enginners >Seasonal Variation of Water Quality in On-Farm Water Storage Systems: Case Study of a Mississippi Delta Agricultural Watershed
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Seasonal Variation of Water Quality in On-Farm Water Storage Systems: Case Study of a Mississippi Delta Agricultural Watershed

机译：农场储水系统中水质的季节性变化：密西西比三角洲农业分水岭案例研究

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The overuse of fertilizers in supporting increased agricultural production to feed a growing population can contribute to a significant release of nutrients to groundwater via percolation, and adjacent waterbodies via surface and irrigation runoff. This excess of nutrients could be detrimental to aquatic ecosystems by altering the nutrients' natural cycle. This environmental issue is of special interest in the Mississippi River Basin, as the downstream movement of nutrients from croplands stimulatesthe development of the hypoxia zone in the northern Gulf of Mexico. To address this regional concern, several types of Best Management Practices (BMPs) have been implemented with the fundamental aim of reducing nutrient loading from agricultural lands inthe Mississippi Delta Region. In recent years, On-Farm Water Storage (OFWS) systems have been attracting much attention because of their potential benefits to the environment, farmers, and landowners. However, little is known about the watershed-scale impacts of these systems, as well as their effectiveness in reducing nutrient loading downstream. This study describes the seasonal variability of nitrate nitrogen and total phosphorus concentrations measured in the OFWS system at a farm in Porter Bayou watershed, Mississippi. We collected water samples from February 2012 to December 2014 and used boxplots along with the Wilcoxon rank-sum test to analyze water quality changes in the system. Our initial assessment of nutrient changes through the system showed a reduction of 67% in nitrate nitrogen concentration during winter, 50% during spring, and 32% during fall. Total phosphorus was reduced by 22% during the fall season. Preliminary results of this study will help improve the understanding of OFWS systems for water quality pollution control and water conservation.
机译：在支持增加的农业生产中，肥料过度使用的肥料可以通过渗滤和通过表面和灌溉径流来促进营养物质对地下水的显着释放。通过改变营养素的自然循环，这种营养素可能对水生生态系统有害。这种环境问题对密西西比河流域有特别兴趣，因为来自墨西哥湾北部缺氧区的农田刺激的营养态度的下游运动。为了解决这一区域问题，已经通过了几种类型的最佳管理措施（BMP），并通过抵达了Mississippi Delta地区的农业土地营养荷载的基本目的。近年来，农场储水（OFWS）系统由于对环境，农民和土地所有者的潜在利益而受到了很大的关注。然而，关于这些系统的流域的水平影响几乎是知之甚少，以及它们在减少下游营养加载的有效性。本研究描述了在密西西比州波特湾水域的农场的OFWS系统中测量的硝酸盐氮和总磷浓度的季节性变化。我们从2012年2月到2014年12月收集了水样，并使用了Boxplots以及Wilcoxon Rank-Sum测试，以分析系统的水质变化。我们通过系统的营养变化的初步评估显示冬季硝酸盐氮浓度的减少67％，春季期间50％，秋季期间32％。在秋季，总磷总磷减少了22％。本研究的初步结果将有助于改善对水质污染控制和水资源保护的OFWS系统的理解。

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