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通过古生物学技术,将水库每年的居住时间与沉积联系起来

Benjamin C Webster¹, Matthew N Waters¹, Stephen W Golladay²

¹Department of Crop, Soils & Environmental Science, Auburn University, Auburn, AL 36849, United States.

|August 22, 2024

概括

水库水的停留时间显著影响沉积,较长的时间促进藻类吸收和有机物质积累. 干旱加剧了这种影响,增加了沉积物中的度.

科学领域:

环境科学环境科学
地质化学地质化学
临界技术临界技术

背景情况:

水库是河流网络中气循环的关键地点.
沉积是这些系统中关键但未被充分研究的途径.
对比的流域土地使用 (城市与农村) 影响水库过程.

研究的目的:

调查水的停留时间和水库中沉积之间的十年关系.
为了比较城市和农村流域的水库之间的这些关系.
评估干旱对居住时间和循环的影响.

主要方法:

来自八个主干水库的沉积物核心的分析.
测量沉积物中的度,C:N比率和光合作用颜料.
与其他水库参数 (体积,深度,面积,流出) 和土地利用的比较.

主要成果:

平均年居留时间与沉积的相关性最强.
较长的停留时间与藻类吸收和沉积有机颗粒的增加相关.
沉积物C:N比率和光合作用颜料表明藻类的影响更大,居住时间更长.
干旱条件显著增加了停留时间 (45-60%),可能使沉积物气增加2.5-4%.

结论:

水的停留时间是河流水库系统中沉积的主要驱动因素.
藻类的生产力,由居住时间驱动,是固的关键机制.
干旱加剧了通过延长居住时间在水库沉积物中的积.

关键词:

干旱干旱干旱干旱的沉积沉积的沉积.储水池储水池储水池储水池储水池居住时间居住时间沉积物沉积物是一种沉积物.

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