AN INTEGRATED APPROACH TO MODELLING HYDROLOGY AND WATER QUALITY IN GLACIERIZED CATCHMENTS

1996 ◽  
Vol 10 (4) ◽  
pp. 479-508 ◽  
Author(s):  
KEITH RICHARDS ◽  
MARTIN SHARP ◽  
NEIL ARNOLD ◽  
ANGELA GURNELL ◽  
MICHAEL CLARK ◽  
...  
Keyword(s):  
Water Quality ◽  
Integrated Approach

scholarly journals Evaluation of Groundwater Using an Integrated Approach of Entropy Weight and Stochastic Simulation: A Case Study in East Region of Beijing

2021 ◽  
Vol 18 (14) ◽  
pp. 7703
Author(s):  
Yongxiang Zhang ◽  
Ruitao Jia ◽  
Jin Wu ◽  
Huaqing Wang ◽  
Zhuoran Luo
Keyword(s):  
Water Quality ◽  
Stochastic Simulation ◽  
Water Quality Index ◽  
Quality Index ◽  
Integrated Approach ◽  
Total Hardness ◽  
Chemical Components ◽  
Wet Season ◽  
Entropy Weight ◽  
Weakly Alkaline

Groundwater is an important source of water in Beijing. Hydrochemical composition and water quality are the key factors to determine the availability of groundwater. Therefore, an improved integrated weight water quality index approach (IWQI) combining the entropy weight method and the stochastic simulation method is proposed. Through systematic investigation of groundwater chemical composition in different periods, using a hydrogeochemical diagram, multivariate statistics and spatial interpolation analysis, the spatial evolution characteristics and genetic mechanism of groundwater chemistry are discussed. The results show that the groundwater in the study area is weakly alkaline and low mineralized water. The south part of the study area showed higher concentrations of total dissolved solids, total hardness and NO3−-N in the dry season and wet season, and the main hydrochemical types are HCO3−-Ca and HCO3−-Ca-Mg. The natural source mechanism of the groundwater chemical components in Chaoyang District includes rock weathering, dissolution and cation exchange, while the human-made sources are mainly residents and industrial activities. Improved IWQI evaluation results indicate that water quality decreases from southwest to northeast along groundwater flow path. The water quality index (WQI) method cannot reflect the trend of groundwater. Sensitivity analysis indicated that the improved IWQI method could describe the overall water quality reliably, accurately and stably.

scholarly journals An Integrated Approach for Evaluating Water Quality between 2007–2015 in Santa Cruz Island in the Galapagos Archipelago

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 937 ◽  
Author(s):  
Cristina Mateus ◽  
Christian A. Guerrero ◽  
Galo Quezada ◽  
Daniel Lara ◽  
Valeria Ochoa-Herrera
Keyword(s):  
Water Quality ◽  
Population Change ◽  
Human Impacts ◽  
Saline Water ◽  
Monitoring Program ◽  
Integrated Approach ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Background Levels ◽  
The Impact

Water quality in Galápagos has been deteriorating by increased human impacts over the past few decades. Water quality is a key environmental component and issue in need to be evaluated in the Pelican Bay Watershed, the biggest urban and economic development of Santa Cruz Island, for better management and regulation of water resources. This study assesses coastal and ground water bodies of Pelican Bay by employing a 9-year dataset obtained during a local water quality monitoring program conducted by the Galápagos National Park. Physical-chemical and microbial parameters were evaluated with respect to national and international water quality standards. A statistical integrated approach was performed to calculate environmental background levels of water quality parameters and to explore their seasonal and spatial variation. In addition, a sensitivity analysis was conducted to evaluate the impact of changes in tourism and residents in San Cruz Island in the degradation of water sources. Results highlighted are: (a) water is not suitable for drinking and domestic use at some inland sites; (b) saline water is used for irrigation in the highlands; (c) the presence of parameters of concern at coastal sites represent a risk for human and ecosystem health; (d) background levels may serve for defining site-specific limits to control water quality, and; (e) the influence of population change on water quality conditions varied at each site with a higher effect at coastal sites relatively to inland sites. This study provided valuable information of the water quality status in Santa Cruz Island and can serve as a baseline for effective water management and control of pollution.

Water quality dynamic during rainfall episodes: integrated approach to assess diffuse pollution using automatic sampling

2019 ◽  
Vol 191 (6) ◽  
Author(s):  
Caroline Kozak ◽  
Cristovão Vicente Scapulatempo Fernandes ◽  
Sérgio Michelotto Braga ◽  
Luciane Lemos do Prado ◽  
Sandro Froehner ◽  
...  
Keyword(s):  
Water Quality ◽  
Integrated Approach ◽  
Diffuse Pollution ◽  
Automatic Sampling

Wet weather water quality modelling of a Portuguese urban catchment: difficulties and benefits

2002 ◽  
Vol 45 (3) ◽  
pp. 131-140 ◽  
Author(s):  
L.M. David ◽  
R.S. Matos
Keyword(s):  
Water Quality ◽  
River Flow ◽  
Integrated Approach ◽  
Integrated Modelling ◽  
Sewer System ◽  
Deterministic Modelling ◽  
Short And Long Term ◽  
Long Term Impact ◽  
The Impact

This paper discusses the use of water quality deterministic modelling together with an integrated approach to assess the impact of urban stormwater discharges into ephemeral watercourses, based on the study of a Portuguese catchment. The description of the main aspects, difficulties and benefits found during data collection and model calibration and verification is presented, and the associated uncertainties and errors discussed. Experimental results showed a strong short- and long-term impact of sewer discharges on rivers, and confirmed deposition, resuspension and transport of pollutants as important processes for the water quality. However, the resuspension of riverbed sediment pollutants during storms was probably more significant than the direct impact of the urban discharges. The HydroWorks™ model was used since it allows for the calculation of pollutant build-up on catchment surfaces and in gully pots, their wash-off, and the deposition and erosion of sediments in sewers. However, it uses several constants, which could not be independently calibrated, increasing the uncertainty already associated with the data. River flows have quite different magnitude from the sewer system overflows, which, together with the difficulties in evaluating river flow rates, makes the integrated modelling approach rather complex and costly.

scholarly journals Environmental Health Diagnosis in a Park as a Sustainability Initiative in Cities

2020 ◽  
Vol 12 (16) ◽  
pp. 6436
Author(s):  
Martha Georgina Orozco-Medina ◽  
Javier Omar Martínez-Abarca ◽  
Arturo Figueroa-Montaño ◽  
Valentina Davydova-Belitskaya
Keyword(s):  
Water Quality ◽  
Environmental Health ◽  
Integrated Approach ◽  
Biological Indicators ◽  
National Standards ◽  
Human Consumption ◽  
Wooded Area ◽  
Coarse Particulate Matter ◽  
Size Of Particles ◽  
Health Diagnosis

Environmental health diagnosis was made in a sport and recreational park in the city of Guadalajara, Jalisco, Mexico. The objective of this research was to perform an environmental diagnosis in Tucson Park; it concentrated on air quality (fine and coarse particulate matter, carbon dioxide), environmental noise, water quality of springs and a pond according to national standards, and macroinvertebrates as biological indicators of water condition, as well as phytosanitary state of wooded area. Additionally, a survey was conducted to study environmental perception. Results of the study highlighted significant statistical differences concerning the amount and size of particles for the winter and spring seasons. Noise levels within the park premises exceeded the Mexican standard. Water quality measured through general criteria of integrated water quality index (WQI) qualified the park´s analyzed springs as acceptable but to abstain its use and human consumption. Finally, the perception survey identified insecurity as the major problem, followed by the lack of lighting and effective communication of courses and workshops for the community to attend. It is one of the first environmental diagnoses in sport parks in Mexico´s Metropolitan Areas as an integrated approach of ecosystem health and wellbeing of city inhabitants.

Integrated approach to quality indices and health risk assessment of water in the Bahr Yusuf Canal, Fayoum, Egypt

2019 ◽  
Vol 48 (4) ◽  
pp. 337-354 ◽  
Author(s):  
Mohamed E.M. Hassouna ◽  
Mohamed E. Goher ◽  
Seliem M. El-Sayed ◽  
Reda A.A.A. Hassan
Keyword(s):  
Water Quality ◽  
Health Risk ◽  
Hazard Quotient ◽  
Aquatic Toxicity ◽  
Human Health Risk ◽  
Hazard Index ◽  
Pollution Index ◽  
Integrated Approach ◽  
Potential Health ◽  
Aquatic Life

Abstract The Bahr Yusuf Canal is the life artery of the Fayoum Province, which provides the province with two thirds of the freshwater quota from the Nile River. The present work was carried out to assess the suitability of water in the Bahr Yusuf Canal for various purposes and to assess the potential health risk associated with metal content. The results showed that the water quality of Bahr Yusuf was classified as poor and very poor for recreational use according to the Oregon WQI. On the other hand, the Aquatic Toxicity Index indicated the suitability of water for all fish species. The Canadian WQI and the Weighted Arithmetic WQI classified the canal water as good (WQI = 92), fair (WQI = 73) & marginal (WQI = 64) and excellent, poor to good & good to excellent for irrigation, drinking and aquatic life, respectively. Despite the significant contamination of water with heavy metals (as indicated by the Heavy Pollution Index, ranging from 104.44 to 206.32, from 16.81 to 38.48 and from 219.07 to 472.24 μg l−1), the Hazard Quotient (HQ) and the Hazard Index (HI) data indicate that water of Bahr Yusuf does not pose a human health risk through ingestion or dermal contact. In general, the study showed that water in the Bahr Yusuf Canal is characterized by different levels of pollution, which requires rapid and critical intervention by responsible authorities to prevent the discharge of different types of waste and further deterioration of the water quality during the lifetime of the channel and its subsequent rehabilitation.

scholarly journals An integrated approach for urban water quality assessment

2011 ◽  
Vol 64 (7) ◽  
pp. 1519-1526 ◽  
Author(s):  
A. S. Beenen ◽  
J. G. Langeveld ◽  
H. J. Liefting ◽  
R. H. Aalderink ◽  
H. Velthorst
Keyword(s):  
Water Quality ◽  
Drainage System ◽  
Water Quality Assessment ◽  
Integrated Approach ◽  
Urban Drainage ◽  
Urban Water ◽  
Sewer System ◽  
Urban Drainage System ◽  
Urban Water Quality ◽  
Receiving Water

This paper introduces an integrated approach for the assessment of receiving water quality and the relative contribution of the urban drainage system to perceived receiving water quality problems. The approach combines mass balances with relatively simple receiving water impact models. The research project has learned that the urban drainage system is only one of the determining factors with respect to receiving urban water quality problems. The morphology of the receiving waters and the non-sewer sources of pollution, such as waterbirds, dogs, or inflow of external surface water might be equally important. This conclusion underlines the necessity to changes today's emission based approach and adopt an integral and immission based approach. The integrated approach is illustrated on a case study in Arnhem, where the receiving water quality remained unsatisfactory even after retrofitting a combined sewer system into a separated sewer system.

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