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河流恢复可以降低农业景观中的酸盐水平

Xiangqian Zhou¹, Seifeddine Jomaa¹, Xiaoqiang Yang²

¹Department of Aquatic Ecosystem Analysis and Management, Helmholtz Centre for Environmental Research - UFZ, Magdeburg, Germany.

The Science of the total environment

|June 24, 2023

概括

恢复河流曲性可以显著提高河流网络中酸盐的保留,特别是在农业低地. 这种方法为改善水质和满足欧洲水框架指令标准提供了一个有前途的战略.

科学领域:

水文学和水资源管理
环境科学环境科学
生态生态学生态生态学

背景情况:

欧洲的水体面临着因流体形态变化和扩散污染造成的重大压力,阻碍了满足水框架指令 (WFD) 标准的努力.
恢复举措取得了有限的成功,部分原因是缺乏对形态变化的影响的了解,例如重新曲,对河流网络中的酸盐保留的影响.

研究的目的:

研究河流形态对整个河流网络中酸盐保留的影响.
评估恢复河流曲性的潜力,作为加强酸盐去除和改善水质的战略.

主要方法:

实施完全分布式的基于工艺的mHM-Nitrate模型,用于德国中部3200平方公里的流域.
在当前和恢复 (增加曲性) 流形态条件下对酸盐保留的模拟.
在不同景观类型 (农业低地与森林山脉) 中分析总酸盐保留效率,考虑脱和同化吸收.

主要成果:

mHM-酸盐模型准确地复制了每日排放和酸盐度 (Kling-Gupta值为0.78和0.74).
总酸盐保留效率因季节性变化而异,夏季的比率 (74.7 ± 23.2%) 比冬季 (5.1 ± 0.61%) 高.
在夏季,低地农业地区的脱和同化吸收率明显高于山区森林地区.
模拟恢复溪流曲性提高了净酸盐保留效率高达25.4 ± 5.3%,在较小的溪流中观察到更大的影响.

结论:

针对低地农业区的恢复战略具有提高酸盐保留的更大潜力.
增加河流的曲性是一种可行的方法,可以增加酸盐的保留率,并减少酸盐度.
将形态恢复与污染控制措施相结合,对于WFD下有效的水质管理至关重要.

关键词:

吸收方式的吸收.恢复河流的恢复工作这就是Sinuosity.流动脱化是指流动脱化.mHM - 酸盐模型

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