人工调节通过改变水文条件,影响酸盐来源和布水库中的转化
Gaoyang Cui1, Xiao-Dong Li2, Mengke Zhang1
1College of Geographical Science, Faculty of Geographical Science and Engineering, Henan University, Zhengzhou, 450046, China; Henan Dabieshan National Field Observation and Research Station of Forest Ecosystem, China.
Journal of environmental management
|April 4, 2025
概括
布水库的水文变化对酸盐循环产生重大影响. 水库内的化是酸盐的主要来源,由水的稳定性和流水调节,影响循环.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 生态生态学 生态生态学
背景情况:
- 储水池在酸盐循环中发挥着关键作用,但人类诱导的水文变化对酸盐来源和布式水电系统变化的影响尚不清楚.
- 了解这些过程对于管理受监管河流系统中的水质和生态系统健康至关重要.
研究的目的:
- 为了研究酸盐的时空分布及其同位素特征 (δ15NNO3, δ18O, δD, Δ17OH2O) 在级联水库中.
- 为了确定酸盐的来源和量化现场化贡献.
- 确定主要的酸盐转化路径及其通过水文因素的调节,如水柱稳定性和流水.
主要方法:
- 在中国西南部的武江河沿线的布水库进行现场采样.
- 对酸盐度和酸盐 (δ15NNO3, δ18O) 和水 (δD, Δ17OH2O) 的稳定同位素的分析.
- 应用贝叶斯稳定同位素混合模型 (MixSIAR) 并分析相对水柱稳定性 (RWCS) 和流水.
主要成果:
- 肥料和污水 (M&S) 被确定为主要的外部酸盐来源 (43.5%),其次是土壤有机 (SON, 27.2%),化学肥料 (CF, 18.5%),以及大气降水 (AP, 10.8%).
- 现场化被发现是一个重要的,以前被低估的酸盐来源,在1月份贡献了59%,在7月份贡献了40%,在10月份贡献了24%.
- 化和同化的结合过程是主要的酸盐转化途径,受到RWCS和流水 (p < 0.01) 的强烈影响.
结论:
- 布水库是通过化生产酸盐的重要地点,这个过程受到水文条件和热分层的严重调节.
- 水文因素,特别是相对水柱稳定性和流水,是这些系统中循环的关键调节者.
- 这项研究强调了在水库酸盐预算中考虑现场化的重要性,并促进了对人类对水生循环的影响的理解.
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