Transport of Conservative and “Smart” Tracers in a First-Order Creek: Role of Transient Storage Type
Transport of Conservative and “Smart” Tracers in a First-Order Creek: Role of Transient Storage Type
复制标题
一阶溪流中保守和“智能”示踪剂的传输：瞬态存储类型的作用
DOI：
10.3390/w9070485
复制
发表时间：
2017
期刊：
影响因子：
3.4
通讯作者：
Y. Pachepsky
中科院分区：
文献类型：
--
作者：
A. Yakirevich;D. Shelton;R. Hill;L. A. Kiefer;M. Stocker;R. Blaustein;M. Kuznetsov;G. McCarty;Y. Pachepsky
使用刃天青（Raz）等“智能”示踪剂可以评估河流中沉积物-水的相互作用和相关的生物活动。我们比较了两种方法来模拟瞬态存储（TS）的保守和反应性示踪剂的运输的影响。第一种方法认为TS是由代谢活性和代谢非活性区室组成的，而第二种模型方法考虑了表面瞬时储存（STS）和低流瞬时储存（HTS）。在美国马里兰州马里兰州的一个常年一阶小溪中，通过注入保守示踪剂溴（Br）和反应性示踪剂（Raz）并在两个堰站取样，收集实验数据。STS-HTS方法导致Br传输和Raz及其产品Rezorufin（Rru）穿透曲线的尾部的更准确的模拟。沉积物支持大的微生物群落，在小溪的STS-HTS模型提供了额外的参数来表征微生物水质指示生物的栖息地。
Using “smart” tracers such as Resazurin (Raz) allows assessment of sediment-water interactions and associated biological activity in streams. We compared two approaches to simulate the effects of transient storage (TS) on the transport of conservative and reactive tracers. The first approach considered TS as composed of metabolically active and metabolically inactive compartments, while the second model approach accounted for the surface transient storage (STS) and hyporheic transient storage (HTS). Experimental data were collected at a perennial first-order creek in Maryland, MD, USA, by injecting the conservative tracer bromide (Br) and the reactive (Raz) tracer and sampling water at two weir stations. The STS–HTS approach led to a more accurate simulation of Br transport and tails of the Raz and its product Rezorufin (Rru) breakthrough curves. Sediments support large microbial communities, and the STS–HTS model in creeks provides additional parameters to characterize the habitats of microbial water-quality indicator organisms.