Linking river nutrient concentrations to land use and rainfall in a paddy agriculture–urban area gradient watershed in southeast China

Xia, Yongqiu; Ti, Chaopu; She, Dongli; Yan, Xiaoyuan

doi:10.1016/j.scitotenv.2016.05.134

Cited by 67 publications

(30 citation statements)

References 65 publications

(87 reference statements)

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“…The investigation of the changes due to the effects of rainfall runoff on the river is highly necessary for watershed management. Besides, the impacts of rainfall runoff on river water can be intensified through interactions with different land use such as forestry, agriculture, and residential development in the adjacent area [13][14][15]. Hence, the impact of land use such as longhouses and logging activities near the river on its water quality is also described in the present study.…”

mentioning

confidence: 91%

Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia

Ling

Soo

Liew

et al. 2017

Pol. J. Environ. Stud.

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mentioning

confidence: 91%

Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia

Ling

Soo

Liew

et al. 2017

Pol. J. Environ. Stud.

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“…Generally, nutrient loadings in the river are linked to the natural and anthropogenic sources, e.g. runoff from urban areas and plantations; and inflow through organic-rich ground [13]. In addition, the non-point sources, e.g.…”

Section: Discussionmentioning

confidence: 99%

“…According to [11], [13], nutrients in the water could be diluted or enhanced in response to the areas that the water flows through and the nutrient concentrations in turn influence the self-remediation of the waterway. Specifically, the pollutants loads during the rainy season are linked to the point and nonpoint sources [16].…”

Section: Discussionmentioning

confidence: 99%

Assessment of Nutrient Loads and Self-Remediation: A Case Study of the South Rangsit Canal in Thailand’s Pathum Thani Province

Thongdonphum

Vanichkul

Champasri

et al. 2018

GEOMATE

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This research investigates the effects of seasonal variability (rainy and dry seasons) and nutrient transfer patterns on the nutrient loads (dissolved inorganic nitrogen (DIN) and orthophosphate phosphorus (P)) and the self-remediation of the south Rangsit canal in Thailand -1 , respectively. The DIN and P loads were 5.05 and 0.40 tons/day in the rainy season (September); and 5.12 and 0.32 tons/day in the dry season (March). The relative remediation efficiency (EFR RR ) were mostly negative, especially in the dry season, indicating the inadequate self-remediation and nutrient input-output imbalance. The findings also showed that water mass transfer directions influenced the self-remediation and nutrients accumulation in the study area.

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“…By parameterizing wetland location as the fraction of a site's contributing area that is intercepted by a wetland, a previous study found that a wetland restoration strategy that accounts for the effects of spatial location in stream networks could provide a much greater benefit to water quality than previously assumed (Hansen et al, 2018). In contrast, some statistical models and measurements have emphasized that the CW area has proportionate effects on nutrient discharge (Woltemade, 2000;Xia et al, 2016). The importance of wetland size and location for nutrient discharge and its variation remains poorly understood.…”

Section: Implications For Water Quality Managementmentioning

confidence: 99%

“…Modeling studies at the watershed scale have documented how CWs can substantially treat nutrients from arable land (Borin & Tocchetto, 2007;Reinhardt et al, 2006;Strayer et al, 2003;Tomer et al, 2013;Xia et al, 2016). In contrast, measurement studies have shown more variable results (Jordan et al, 2003;Kovacic et al, 2000;O'Geen et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

How Variations in Constructed Wetlands Geography Affect Nutrient Discharge

Xia

Yan

2020

JGR Biogeosciences

Self Cite

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Constructed wetland geography, including size and location, plays a key role in nutrient retention; it remains a challenge to isolate and quantify the contributions of wetland size and spatial location. We constructed a clear conceptual model and modeled the effects of variations in wetland size (represented as cells width in each flow path of a grid of cells) and location on the mean nutrient discharge (MD) and standard deviation of nutrient discharge (SdD). A basic comparison between a broadly and mathematically tractable Poisson distribution and a conventionally hypothesized uniform distribution showed that wetlands with a Poisson width or Poisson location distribution exhibit much greater effects on SdD than wetlands with a uniform distribution. We then compared and summarized the effects of 10,000 variations in wetlands on MD and SdD. For all kinds of wetlands, the MD was largely determined by the mean size, mean location, and evenness of location, while the SdD was closely related to the evenness and standard deviation (Sd) of both wetland size and location. Incorporating these factors into landscape models could greatly simplify the model structure and improve precision. Location was more important than size for both MD and SdD, regardless of the retention of the wetlands, which suggested that optimizing wetland location should be a high priority for water quality management and will yield greater benefits than widening wetlands elsewhere.

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Linking river nutrient concentrations to land use and rainfall in a paddy agriculture–urban area gradient watershed in southeast China

Cited by 67 publications

References 65 publications

Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia

Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia

Assessment of Nutrient Loads and Self-Remediation: A Case Study of the South Rangsit Canal in Thailand’s Pathum Thani Province

How Variations in Constructed Wetlands Geography Affect Nutrient Discharge

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