气候变化领域集成服务门户(CCPortal): Groundwater levels, climate and anthropogenic factors affect the hydrology and water quality of an intermittent and a regulated subtropical stream

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DOI	10.1002/hyp.15074
	Groundwater levels, climate and anthropogenic factors affect the hydrology and water quality of an intermittent and a regulated subtropical stream
	Kim, Donghwan; Lu, Jing; Roberts, Melanie E.; Roberts, David T.; Orr, David N.; Hamilton, David P.
发表日期	2024
ISSN	0885-6087
EISSN	1099-1085
起始页码	38
结束页码	1
卷号	38 期号:1
英文摘要	Stream hydrology and water quality are highly interconnected and impacted by climate, land use and geology. We examined this connection using monitoring data from 2000 to 2019 for two streams with contrasting hydrological regimes-intermittent and regulated perennial-in subtropical Queensland, Australia. Our main objective was to evaluate relationships between groundwater levels, climate and flow regulation on the hydrology and water quality of an intermittent and a regulated subtropical stream. In intermittently flowing Lockyer Creek, flow was highly dependent on groundwater levels and occurred when the aquifer was recharged to elevations exceeding the upper 90-percentile value. With 9.4% of the catchment area in irrigated horticulture, flow in Lockyer Creek was also likely to be reduced by drawdown of the aquifer for irrigation, with no flow for 30% to 81% of days over the observation period for stations in Lockyer Creek. In contrast, flow in the mid-Brisbane River was continuous, regulated by discharge from a large upstream dam. Nutrient and suspended sediment concentrations in Lockyer Creek were generally higher than in the mid-Brisbane River, likely associated with runoff from agricultural areas adjacent to the stream, while the upstream dam likely reduced the concentration and variability of nutrients and suspended sediment in the mid-Brisbane River. During periods of low flow in the mid-Brisbane River, longitudinal changes in nutrient and suspended sediment concentrations occurred, notably a significant decrease in total and dissolved inorganic nitrogen concentrations downstream (p < 0.05), indicating a possible effect of in-stream algal uptake and denitrification. This study highlights the impact of human modifications on stream hydrology and water quality in the face of climate change. The findings can inform decision-making on groundwater irrigation or dam release control for water security.
英文关键词	baseflow and stormflow; climate variability; dam impact; groundwater irrigation; in-stream process; nutrient limitation; streamflow pattern; subtropical stream
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:001139602200001
来源期刊	HYDROLOGICAL PROCESSES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302212
作者单位	Griffith University; Griffith University; Griffith University
推荐引用方式 GB/T 7714	Kim, Donghwan,Lu, Jing,Roberts, Melanie E.,et al. Groundwater levels, climate and anthropogenic factors affect the hydrology and water quality of an intermittent and a regulated subtropical stream[J],2024,38(1).
APA	Kim, Donghwan,Lu, Jing,Roberts, Melanie E.,Roberts, David T.,Orr, David N.,&Hamilton, David P..(2024).Groundwater levels, climate and anthropogenic factors affect the hydrology and water quality of an intermittent and a regulated subtropical stream.HYDROLOGICAL PROCESSES,38(1).
MLA	Kim, Donghwan,et al."Groundwater levels, climate and anthropogenic factors affect the hydrology and water quality of an intermittent and a regulated subtropical stream".HYDROLOGICAL PROCESSES 38.1(2024).