School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
Environ Sci Pollut Res Int. 2022 Nov;29(55):83004-83019. doi: 10.1007/s11356-022-21660-6. Epub 2022 Jun 27.
To make up for the deficiency of transient storage and nutrient retention capacity of some headwater streams, some effective artificial measures have been developed to improve the stream ecosystem functions. But few studies have focused on the effects of artificial manipulation on nutrient retention in hydrologic and non-hydrologic processes of streams. In response, we selected an agricultural headwater stream in the Banqiao River tributary of Chaohu Lake Basin, artificially altered the flow pattern in the main-channel by introducing barriers which were composed of soil, coarse sand, and stones, and used the tracer experiment and OTIS (one-dimensional transport with inflow and storage) model to assess the transient storage potential of stream and the nutrient retention of hydrologic and non-hydrologic processes. Compared with the control, the retention capacity of ammonium (NH) and phosphate (PO) and the transient storage potential were increased after introducing barriers. In addition, the total retention (TR), hydrologic retention (HR), and non-hydrologic retention (NHR) of NH and PO were significantly increased after manipulation.
为弥补一些源头溪流暂存和养分保留能力的不足，人们开发了一些有效的人工措施来改善溪流生态系统功能。但很少有研究关注人工干预对水文和非水文过程中养分保留的影响。有鉴于此，我们选择了巢湖流域板桥河支流的一条农业源头溪流，通过引入由土壤、粗砂和石块组成的障碍物来改变主河道的水流模式，并利用示踪实验和 OTIS（带入流和存储的一维输运）模型来评估溪流的暂存潜力以及水文和非水文过程的养分保留情况。与对照相比，引入障碍物后，氨（NH）和磷酸盐（PO）的保留能力和暂存潜力增加。此外，NH 和 PO 的总保留量（TR）、水文保留量（HR）和非水文保留量（NHR）在操作后均显著增加。
