Application of GWLF model in the Baohe River Watershed: Analysis of the source composition of nitrogen and phosphorus in the region

Qi, Zuoda; Kang, Gelin; Hu, Chuanqi; Xu, Yong; Chen, Hanbao

doi:10.1088/1755-1315/621/1/012079

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…We realize that important steps had been made toward improved understanding the environmental impacts of N pollution on water systems and associated pollution management by abundant local scale studies. These studies have generally provided more detailed spatial and temporal level of pollution status and associated source attribution by two types of approaches: site-level measurements, stable isotopes combined with statistical analysis − (e.g., Bayesian analysis and 1-D mathematical equation for environmental capacity calculation) or small-scale process-based models − such as SWAT and GBNP . However, providing such detailed-level assessments for the whole of China is theoretically possible but practically not feasible yet, as it requires substantial input data and measurements for calibration and validation.…”

Section: Resultsmentioning

confidence: 99%

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Chen,

Strokal,

van Vliet

et al. 2024

Environ. Sci. Technol.

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Nitrogen (N) supports food production, but its excess causes water pollution. We lack an understanding of the boundary of N for water quality while considering complex relationships between N inputs and in-stream N concentrations. Our knowledge is limited to regional reduction targets to secure food production. Here, we aim to derive a spatially explicit boundary of N inputs to rivers for surface water quality using a bottom-up approach and to explore ways to meet the derived N boundary while considering the associated impacts on both surface water quality and food production in China. We modified a multiscale nutrient modeling system simulating around 6.5 Tg of N inputs to rivers that are allowed for whole of China in 2012. Maximum allowed N inputs to rivers are higher for intensive food production regions and lower for highly urbanized regions. When fertilizer and manure use is reduced, 45–76% of the streams could meet the N water quality threshold under different scenarios. A comparison of “water quality first” and “food production first” scenarios indicates that trade-offs between water quality and food production exist in 2–8% of the streams, which may put 7–28% of crop production at stake. Our insights could support region-specific policies for improving water quality.

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Section: Resultsmentioning

confidence: 99%

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Chen,

Strokal,

van Vliet

et al. 2024

Environ. Sci. Technol.

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Monte Carlo simulation and PMF model for assessing human health risks associated with heavy metals in groundwater: a case study of the Nubian aquifer, Siwa depression, Egypt

Eid,

Mikita,

Eissa

et al. 2024

Front. Earth Sci.

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IntroductionThe groundwater in arid countries such as Egypt represent the main water resources in the desert regions due to the long distance between these regions (oasis) and Nile River. Contamination of these limited water resources with toxic metals threaten the health of individuals in these regions.MethodsThe current study integrates isotopic tracers, hydrogeochemistry, geophysical logs, positive matrix factorization (PMF model), and Monte Carlo (MCS) simulation for pollution source apportionment and health risks associated with heavy metals in the Nubian Sandstone aquifer (NSSA).Results and DiscussionThe water resource used for drinking purposes (NSSA) is pale meteoric water (non-rechargeable aquifer). Silicate weathering, old trapped sea water, reverse ion exchange evaporation, and dissolution are the dominant mechanisms controlling water chemistry. PMF model showed that the major ions and heavy metals in groundwater of the NSSA originated from four significant sources (anthropogenic activities, dissolution of minerals, iron-bearing minerals, mixing with old trapped seawater, and hydrothermal water). The total risk (HI) oral values highlighted significant non-carcinogenic dangers for adults and children through the oral exposure. At the same time, dermal contact posed a no risk for adults and a high risk for children. Most samples had carcinogenic risk (CR) values higher than the allowed limits (1.0E-4) for metals like Cadmium, chromium, and lead, suggesting carcinogenic effects across all age groups. The Monte Carlo approach-based health concern evaluation model assessed the 5th % CR oral values (child) as 0.00012, 0.0036, and 0.0088 for Cd, Cr, and Pb, respectively, indicating more significant potential dangers to children. Urgent and comprehensive water treatment measures are imperative to mitigate the identified carcinogenic and non-carcinogenic health risks in the study area.

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Application of GWLF model in the Baohe River Watershed: Analysis of the source composition of nitrogen and phosphorus in the region

Cited by 2 publications

References 7 publications

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach

Monte Carlo simulation and PMF model for assessing human health risks associated with heavy metals in groundwater: a case study of the Nubian aquifer, Siwa depression, Egypt

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