Machine Learning Application for Nutrient Removal Rate Coefficient Analyses in Horizontal Flow Constructed Wetlands

ACS ES&T Water, Год журнала: 2024, Номер 4(6), С. 2619 - 2631

Опубликована: Май 1, 2024

Land area optimization for horizontal flow constructed wetlands (HFCWs) with a low organic loading rate (OLR) needs special considerations as the microflora changes dramatically OLR. The P-k-C* approach does not lead to an accurate calculation of k-values in these wetlands. In this research, nonlinear machine learning models [Support Vector Regression (SVR), Random Forest (RF), and Artificial Neural Networks (ANN)] are applied predict realistic k-values. Data from 37 low-OLR HFCWs (n = 544) were analyzed, calculated found vary markedly (0.059–0.249 average 0.113 ± 0.090 m/day). classification based on OLR, rate, media depth leads reduction standard deviations (SDs) 83.40 35.27%. least SDs needed optimal design CWs. SVR, RF, ANN tested, best prediction efficiency testing datasets was achieved through model R2(kTKN)= 0.768 (RMSE 0.067) total Kjeldahl nitrogen (TKN), R2(kTN)= 0.835 0.043) (TN), R2(kTP) 0.723 0.087) phosphorus (TP). outcome validated using primary data HFCWs, which also confirmed superiority ANN-based model, can be used customization HFCWs.

Язык: Английский

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Effects of mixed land use on urban stormwater quality under different rainfall event types

The Science of The Total Environment, Год журнала: 2024, Номер 950, С. 175124 - 175124

Опубликована: Июль 30, 2024

The joint effect of mixed land uses and rainfall event types was studied using a two-year field monitoring program in four urban catchments Calgary, Alberta, Canada. Event mean concentration (EMC) pollutant load (EPL) were employed to evaluate the total suspended sediment (TSS), nitrogen phosphorus. correlation analysis showed that most phosphorus components (except for NO

Язык: Английский

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Machine learning-driven predictive frameworks for optimizing chemical strategies in Microcystis aeruginosa mitigation

Journal of Water Process Engineering, Год журнала: 2025, Номер 71, С. 107235 - 107235

Опубликована: Фев. 12, 2025

Язык: Английский

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Transport processes of dissolved and particulate nitrogen and phosphorus over urban road surface during rainfall runoff

The Science of The Total Environment, Год журнала: 2024, Номер 948, С. 174905 - 174905

Опубликована: Июль 21, 2024

Язык: Английский

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Pollutant removal in an experimental bioretention cell situated in a northern Chinese sponge city

Water Science & Technology, Год журнала: 2024, Номер 89(8), С. 2164 - 2176

Опубликована: Апрель 15, 2024

To assess the viability and effectiveness of bioretention cell in enhancing rainwater resource utilization within sponge cities, this study employs field monitoring, laboratory testing, statistical analysis to evaluate water purification capabilities cell. Findings indicate a marked impact on surface runoff, with removal efficiencies 59.81% for suspended solids (SS), 39.01% chemical oxygen demand (COD), 37.53% ammonia nitrogen (NH

Язык: Английский

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Ecosystem Functions in Urban Stormwater Management Ponds: A Scoping Review

Sustainability, Год журнала: 2024, Номер 16(17), С. 7766 - 7766

Опубликована: Сен. 6, 2024

Stormwater management ponds (SWMPs) are an important tool for sustainable urban stormwater management, controlling the quantity and quality of runoff in cities. Beyond their engineering purpose, SWMPs may hold ecological value that is often overlooked. This especially case array geochemical, physical, biological processes (i.e., ecosystem functions) SWMPs. Here, we performed a scoping review function to summarize current knowledge identify research needs. We searched peer-reviewed papers using Web Science database. Papers did not report specifically on SWMPs, discuss function, or were solely based ecotoxicological tests excluded from further assessment. For remaining papers, information year publication, scope, key findings was extracted. found total 55 have been published since 1996. Our identified areas advancing about nutrient dynamics, contaminants processing, sedimentation, temperature, habitat provisioning, biodiversity Overall, need understand how factors related pond design landscape practices influence function. There also effect climate change examine interactions between humans. Such will only provide opportunities researchers better value, but facilitate more effective

Язык: Английский

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Impacts of climate change on urban stormwater runoff quantity and quality in a cold region

The Science of The Total Environment, Год журнала: 2024, Номер 954, С. 176439 - 176439

Опубликована: Сен. 26, 2024

Climate change poses significant challenges to urban environments affecting both flood risks and stormwater pollutant loadings. However, studies on variations in runoff quantity quality cold regions, which are highly sensitive climate change, notably limited. Integrating climatic, hydrologic, hydraulic modelling, the study assesses potential impacts of volume dynamics a Canadian watershed (Calgary). A two-year field program was conducted support calibration validation Storm Water Management Model (SWMM). Intensity-duration-frequency curves were employed evaluate peak flow rate flooding duration. In addition, typical dry, average, wet years applied continuously simulate during 2050s 2080s. The results suggest substantial increases rates durations, particularly for 5-year return period rainfall, with 1-h, 4-h, 24-h inflow increasing by 74.3% (170.7%), 89.2% (158.4%), 64.1% (102.8%) (2080s) Furthermore, is projected rise 2.4-10.2% 11.8-17.5% Total suspended solids (TSS), total nitrogen (TN), phosphorus (TP) loadings anticipated increase 2.0-36.1%, 3.1-21.4%, 4.1-20.7%, respectively. As result, current system could overload likely deteriorate under impact change. findings beneficial regions develop adaptive strategies that enhance water security environmental sustainability

Язык: Английский

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An innovative method for estimating settling velocity of particles in stormwater using absorbance measurements and modelling

Water Practice & Technology, Год журнала: 2024, Номер 19(5), С. 1810 - 1821

Опубликована: Фев. 26, 2024

ABSTRACT The purpose of the study was to develop a simple and rapid method for measuring average settling velocity particles in stormwater ponds. Water samples with suspended were collected from bottom pond Lund, Sweden. absorbance various measured over 24 h (at 600 nm wavelength) then translated into total solids concentrations. A one-dimensional model based on Mason–Weaver equation coded Python solved. measurements used calibrate model, thereby quantifying velocities dispersion coefficients different zones pond. quantified ranged 40 200 mm/h fast-settling 2 8 slow-settling particles. developed methodology provided mass estimate two modelled particle groups (i.e., fast- particles). Based estimates, dominated all samples, constituting 70–90% solid mass. Due its simplicity inexpensiveness, this is potential alternative more demanding complicated methodologies sedimentation systems.

Язык: Английский

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Computed Tomography Scanning Analysis of Dense Layer Pore Characteristics and Their Effect on Soil Water Infiltration

Опубликована: Янв. 1, 2024

Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI

Язык: Английский

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