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Analysis of agricultural pollution by flood flow impact on water quality in a reservoir using a three-dimensional water quality model

机译：利用三维水质模型分析洪水对农业的污染对水库水质的影响

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摘要

This study presents the Yuqiao Reservoir Water Quality Model (YRWQM), a three-dimensional hydrodynamic and water quality model of the Yuqiao reservoir, China. The YRWQM was developed under the environmental fluid dynamics code (EFDC) model and was calibrated and verified to hydrodynamic and water quality data, using two sets of observed data from January 1 to December 31,2006 and from May 1 to October 31, 2007, respectively. The primary hydrodynamic and transport driving forces are inflows/outflows and surface wind stresses. Considering effects of water transfer and wind on the advection-dispersion processes, the model results showed better agreements with observed data in the reservoir. The YRWQM predicted the variations of water quality resulting from agricultural pollution which flowed into the reservoir with floods lasting for 12 days in 2009. The results indicated that the concentrations of chemical oxygen demand and total nitrogen were increased 225 and 314%, respectively. Considering the interactions between chlorophyll-a and nitrogen in the model, the results indicated the reservoir was not a nitrogen-limited environment. We suggest the management should focus on agricultural pollution strategies for the reservoir during the flood period. The YRWQM could be a useful tool for water sources management in the reservoir.
机译：这项研究提出了玉桥水库水质模型（YRWQM），这是中国玉桥水库的三维水动力和水质模型。 YRWQM是根据环境流体动力学代码（EFDC）模型开发的，并使用2006年1月1日至12月31日以及2007年5月1日至10月31日的两组观测数据对水动力和水质数据进行了校准和验证，分别。主要的流体动力和运输驱动力是流入/流出和表面风应力。考虑到水和风对平流-弥散过程的影响，模型结果表明与储层中的观测数据具有更好的一致性。 YRWQM预测了2009年因农业污染流入水库并持续12天的洪水造成的水质变化。结果表明，化学需氧量和总氮浓度分别增加了225％和314％。考虑到模型中叶绿素-a和氮之间的相互作用，结果表明该储层不是氮限制的环境。我们建议管理层在洪水期间应针对水库的农业污染策略。 YRWQM可能是用于水库水资源管理的有用工具。

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