在三峡水库中大规模的沉积物和运输,基于新的水库运行方法
Xiaoya Tang1, Sidong Zeng2, Guoxian Huang3
1Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Environmental research
|June 12, 2023
概括
三峡水库 (TGR) 的新潮式操作方法 (TTOM) 有效地减少了沉积和 (P) 保留. 这种方法提高了流速和沉积物出口,有助于改善水质和水库管理.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 水资源管理 水资源管理
背景情况:
- 三峡水库 (TGR) 水力动力学条件的变化是沉积,缩和藻类繁殖的主要驱动因素.
- 通过改善水力动力学来缓解沉积和 (P) 保留是三峡水库区域 (TGRA) 的一个关键挑战.
研究的目的:
- 调查一种新的潮类型操作方法 (TTOM) 在TGR内管理大规模沉积物和P运输方面的有效性.
- 与实际操作方法 (AOM) 相比,量化TTOM对沉积,P保持和水力动力学条件的影响.
主要方法:
- 为整个TGRA开发一个全面的水力动力学-沉积物-水质模型.
- 应用TTOM模拟和分析沉积物和P运输动态.
- 使用2015-2017年的数据,比较TTOM与AOM的表现.
主要成果:
- 在TGR中,TTOM显著减少了沉积 (约3%) 和总 (TP) 保留 (流量减少了13.77%,保留率减少了2%-4%).
- 在TTOM下,沉积物外流和出口比率 (E比率) 分别增加了约17.13%和1%-3%.
- 当地流域的流速 (V) 和沉积物承载能力 (S*) 增加了约40%,较大的每日水位波动被证明是有益的.
结论:
- TTOM提供了一种创新和有效的方法,以减轻像TGR这样的大水库中的沉积和P保留.
- 优化水力动力学条件,特别是每日水位波动,对于提高水库水质和环境保护至关重要.
- 该研究提供了关于水力动力学和营养流量变化的宝贵见解,支持大型水库系统的可持续管理.
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