Microtopographic modification conserves urban wetland water quality by increasing the dissolved oxygen in the wet season

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	Microtopographic modification conserves urban wetland water quality by increasing the dissolved oxygen in the wet season
	Liu, Yali; Du, Jianqing; Hu, Panpan; Ma, Mingzhu; Hu, Dan
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2020-01
卷号	87 页码:71-81
关键词	Microtopographic modification Wetland water quality Tributary Waterfall Eutrophication
ISSN号	1001-0742
英文摘要	Microtopography affects hydrological processes and forms different microhabitats. Our previous study uncovered that riparian zone microtopography created various microhabitats with different soil environments and runoff-infiltration patterns. However, how riparian microtopography and microtopography within the water area (waterfall and tributary) affects downstream water quality remains unclear. Therefore, water samples were taken almost monthly in both the main stream and the tributary, before and after waterfalls, and near the bottom of three microtopographic types from June 2016 to March 2017. Compared with the dry season, the fact that water quality worsened in the wet season and that there were positive correlations for nitrate (NO3-) between water and the corresponding soil samples suggested that the riparian-soil environment affected the adjacent water quality mainly in the wet season. Nevertheless, riparian microtopography did not influence water quality downstream because of the low rainfall frequency and the weak leaching process due to plant interception. In the wet season, both the tributary and the waterfall increased the dissolved oxygen in the water body and, therefore, lowered the risk of eutrophication. The tributary has two pathways for improving the water quality, by increased disturbance and flow velocity, while the waterfall only has the former. However, such effects were not significant in the dry season. We conclude that the application of microtopographic modification is useful in maintaining urban wetland water quality in wet seasons. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44383]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Liu, Yali,Du, Jianqing,Hu, Panpan,et al. Microtopographic modification conserves urban wetland water quality by increasing the dissolved oxygen in the wet season[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2020,87:71-81.
APA	Liu, Yali,Du, Jianqing,Hu, Panpan,Ma, Mingzhu,&Hu, Dan.(2020).Microtopographic modification conserves urban wetland water quality by increasing the dissolved oxygen in the wet season.JOURNAL OF ENVIRONMENTAL SCIENCES,87,71-81.
MLA	Liu, Yali,et al."Microtopographic modification conserves urban wetland water quality by increasing the dissolved oxygen in the wet season".JOURNAL OF ENVIRONMENTAL SCIENCES 87(2020):71-81.