Evaluation of North Carolina's estuarine shoreline area of environmental concern from a water quality perspective

1989 ◽  
Vol 17 (2) ◽  
pp. 103-117 ◽  
Author(s):  
Jonathan D. Phillips
Keyword(s):  
Water Quality ◽  
Environmental Concern ◽  
Estuarine Shoreline

Using wetlands for water quality improvement in agricultural watersheds; the importance of a watershed scale approach

2001 ◽  
Vol 44 (11-12) ◽  
pp. 559-564 ◽  
Author(s):  
W.G. Crumpton
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
Wetland Restoration ◽  
Site Selection ◽  
Environmental Concern ◽  
Agricultural Watersheds ◽  
Watershed Scale ◽  
Federal Programs ◽  
Water Quality Improvement ◽  
Agricultural Applications

Agricultural applications of fertilizers and pesticides have increased dramatically since the middle 1960s, and agrochemical contamination of surface and groundwater has become a serious environmental concern. Since the mid-1980s, a variety of state and federal programs have been used to promote wetland restoration, and these continuing efforts provide a unique opportunity for water quality improvement in agricultural watersheds. However, wetland restorations have been motivated primarily by concern over waterfowl habitat loss, and model simulations suggest that commonly used site selection criteria for wetland restorations may be inadequate for water quality purposes. This does not lessen the promise of wetlands for water quality improvement in agricultural watersheds, but rather emphasizes the need for watershed scale approaches to wetland siting and design. Water quality is best viewed from a watershed perspective, and watershed scale endpoints should be explicitly considered in site selection for wetland restoration.

scholarly journals Predicting water filter and bottled water use in Appalachia: a community-scale case study

2017 ◽  
Vol 15 (3) ◽  
pp. 451-461 ◽  
Author(s):  
Jonas G. Levêque ◽  
Robert C. Burns
Keyword(s):  
Water Quality ◽  
Health Risks ◽  
Environmental Concern ◽  
Tap Water ◽  
Bottled Water ◽  
Regression Analyses ◽  
Water Filter ◽  
Education Levels ◽  
Tap Water Quality

A questionnaire survey was conducted in order to assess residents’ perceptions of water quality for drinking and recreational purposes in a mid-sized city in northcentral West Virginia. Two logistic regression analyses were conducted in order to investigate the factors that influence bottle use and filter use. Results show that 37% of respondents primarily use bottled water and that 58% use a household filter when drinking from the tap. Respondents with lower levels of environmental concern, education levels, and lower organoleptic perceptions were most likely to perceive health risks from tap water consumption, and were most likely to use bottled water. Income, age, and organoleptic perceptions were predictors of water filter use among respondents. Clean water for recreational purposes was not found to be significant with either of these models. Our results demonstrate that bottle use and filter use are explained differently. We argue that more education and better communication about local tap water quality would decrease the use of bottled water. We demonstrate that household filters could be used as an alternative to bottled water.

scholarly journals Water quality assessment of Loktak Lake, Northeast India using 2-D hydrodynamic modelling

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Eliza Khwairakpam ◽  
Rakesh Khosa ◽  
Ashvani Gosain ◽  
Arvind Nema
Keyword(s):  
Water Quality ◽  
Environmental Concern ◽  
Oxygen Demand ◽  
Water Quality Assessment ◽  
Northeast India ◽  
State Variables ◽  
Lake Water Quality ◽  
Loktak Lake ◽  
Physically Based

AbstractThe paper comprises of an application of a multi-faceted physically based two-dimensional (2D) hydrodynamic model to simulate the transport phenomena of Loktak Lake, including the water quality of Loktak Lake, for which there is consensus that it is deteriorating due to river discharge from sub-catchments carrying sewage loads, soil sediments and agricultural fertilizers, and therefore, has emerged as a serious environmental concern. Accordingly, the study attempts to understand the overall environmental quality of the Loktak system and in particular simulate Loktak Lake water quality (state) variables by coupling through MIKE 21 ECO Lab. The model simulated dissolved oxygen and biochemical oxygen demand throughout the lake.

scholarly journals Impacts of Artisanal Gold Mining on Water Quality: A Case Study of Tangandougou Commune in Sikasso Region, Mali

2018 ◽  
pp. 621-629
Author(s):  
Mahamadou Moussa Keita ◽  
George Morara Ogendi ◽  
Owuor Owuor ◽  
Wycliff N Nyamao
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Human Health ◽  
Gold Mining ◽  
Environmental Concern ◽  
Anthropogenic Activity ◽  
Physical Parameters ◽  
Temperature Conductivity ◽  
Mining Areas ◽  
Artisanal Gold Mining

Introduction: Unsustainable natural resources utilization is on the increase in the developing countries thus the ability of many local communities to meet their basic needs including food, water and shelter is jeopardized. Uncontrolled gold-mining in Sikasso region is one such an anthropogenic activity that is of great environmental concern to the local and national governments of Mali owing to its potential impacts on water quality, human health and environment. This study was conceived to assess the impacts of artisanal gold mining on water quality in Tangandougou in Sikasso region of Mali.Materials and Methods: In this descriptive study, water samples were collected, processed and analyzed for heavy metals (Lead, Cadmium and Arsenic) according to APHA protocols. Measurements of physical parameters of water quality were done according to APHA protocols. Data were analyzed using both descriptive and inferential statistics.Results: There were no significant spatial differences in physical and chemical parameters (pH, Temperature, Conductivity, total dissolved solids and Salinity) of water quality amongst the sampling sites. However, the heavy metals concentrations in the sampled water exceeded WHO drinking water quality guidelines.Conclusion: It was concluded that the water of Sankarani River and its tributaries is contaminated and may cause adverse effects on human health due to biomagnification and the bioaccumulative nature of heavy metals. Therefore, the study recommends continuous monitoring of the water quality in all water sources adjacent to gold-mining areas to protect human and environmental health.

scholarly journals Optimal control of fish-feeding in a three-dimensional calm freshwater pond considering environmental concern

2021 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
H. W. J. Lee ◽  
Kar Hung Wong ◽  
Y. C. E. Lee
Keyword(s):  
Water Quality ◽  
Environmental Concern ◽  
Three Dimensional ◽  
Fish Feeding ◽  
Feeding Problem ◽  
Control Parameterization ◽  
Water Quality Variables ◽  
Freshwater Pond ◽  
Final Weight ◽  
Feeding Program

<p style='text-indent:20px;'>This paper describes the optimal fish-feeding in a three-dimensional calm freshwater pond based on the concentrations of seven water quality variables. A certain number of baby fishes are inserted into the pond simultaneously. They are then taken out of the pond simultaneously for harvest after having gone through a feeding program. This feeding program creates additional loads of water quality variables in the pond, which becomes pollutants. Thus, an optimal fish-feeding problem is formulated to maximize the final weight of the fishes, subject to the restrictions that the fishes are not under-fed and over-fed and the concentrations of the pollutants created by the fish-feeding program are not too large. A computational scheme using the finite element Galerkin scheme for the three-dimensional cubic domain and the control parameterization method is developed for solving the problem. Finally, a numerical example is solved.</p>

scholarly journals Deep-learning based approach for forecast of water quality in intensive shrimp culture ponds

2018 ◽  
Vol 65 (4) ◽  
Author(s):  
Qi Lin ◽  
Wen Yang ◽  
Cheng Zheng ◽  
Kaihong Lu ◽  
Zhongming Zheng ◽  
...  
Keyword(s):  
Water Quality ◽  
Deep Learning ◽  
Environmental Concern ◽  
Quantitative Characteristic ◽  
Deep Belief Networks ◽  
Shrimp Culture ◽  
Global Environmental ◽  
Accurate Forecast ◽  
Canadian Water Quality Index ◽  
Global Environmental Concern

With the enormous development of aquaculture, reducing the impacts of effluent discharge and improving water quality had become a critical global environmental concern. It is important to assess and predict water quality in the environmental management process of shrimp mariculture. Meanwhile, the accurate forecast of water quality is still in the exploration stage at present. In this study, deep belief networks (DBN) model are used to forecast water quality in intensive shrimp culture. This method based on deep learning includes a five-layered structure to extract relationships between the quantitative characteristic of water bodies and water quality variables. The water quality can be forecasted by the Canadian Water Quality Index (WQI) obtained from the output layer of simulated model. The results show that the DBN model has a great potential to predict the water quality and the ability of generalization and accuracy of model are satisfied.

scholarly journals The cooperative provision of ecosystem services in agriculture

2015 ◽  
Author(s):  
◽  
Heidi Ruth Stallman
Keyword(s):  
Water Quality ◽  
Ecosystem Services ◽  
Environmental Concern ◽  
Agricultural Lands ◽  
Social Entrepreneurs ◽  
Cooperative Management ◽  
Policy Makers ◽  
Extension Agent ◽  
Natural Pest Control

Managing agricultural lands to provide ecosystem services (ES), such as natural pollination, may be essential for the long-term sustainability of agriculture. Most agricultural lands, however, are managed for the short-term production of food, fiber, and fuel, often at the expense of other ES, such as water quality and biodiversity. This dissertation explores cooperative solutions to the problem, where farmers work together to provide ES. We find that natural pest control, pollinating services and water quality are the agricultural-related ES most suited to cooperative management. We find that most Missouri farmers are willing to cooperate to control pests, and simple, local cooperative efforts may be more popular than more formal, regional efforts. In addition, the benefits of cooperation, environmental concern, social capital, extension agent contact and farmer preference for group work, are much more important than trust in determining which farmers may be willing to cooperate. This dissertation is important because it may help policy-makers and social entrepreneurs to organize farmers and to encourage the cooperative management of important agricultural-related ES.

scholarly journals Assessments of Quality Index of River Getsi Irrigation Water in Kano Metropolis, Nigeria

2020 ◽  
pp. 8-16
Author(s):  
T. S. Jamila ◽  
S. Y. Sule
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Irrigation Water ◽  
Quality Index ◽  
Environmental Concern ◽  
Oxygen Demand ◽  
Total Dissolved Solid ◽  
Correlation Statistics ◽  
Moderate Relationship ◽  
Water Indices

The growing problem of water scarcity and absolute constraint in availability of fresh water for irrigation has made the use of waste water necessary for irrigation of agricultural fields. This practice represents an important route for transmission of heavy metals toxicity and pathogens that are of public health and environmental concern. The aim of this study was to assess the water quality index of river Getsi irrigation water in Kano metropolis and substantiate the suitability of the water for a safer irrigation. Results of this experiment have shown a mean biological oxygen demand of 80.43 mg/l, total dissolved solid of 20.63 mg, higher concentration of chromium (8.23 mg/l), and a statistically significant moderate relationship between electrical conductivity and total dissolved solid in the water (r = 0.556, p = 0.037 at 95% CI) using a Kendall's tau correlation statistics. It is concluded that, river Getsi is not unsafe for irrigational practices as the water indices were within recommended ranges, while the heavy metals were above and possible contamination may occur at a point in time. It is therefore recommended that, farmers should be educated on the need and importance of assessing the water quality before embarking on irrigational practices.

scholarly journals Large Scale Soil-Aquifer-Treatment (SAT-MAR) Physical Model Experiments to Improve Water Quality

2020 ◽  
Author(s):  
Teresa E. Leitão ◽  
Tiago Martins ◽  
Maria José Henriques ◽  
J. P. Lobo-Ferreira
Keyword(s):  
Water Quality ◽  
Water Reuse ◽  
Large Scale ◽  
Environmental Concern ◽  
Management Tool ◽  
Soil Aquifer Treatment ◽  
Useful Knowledge ◽  
Hand Pump ◽  
Monitoring Devices

The effluents from agriculture practices usually contain several contaminants creating an environmental concern to downgradient water bodies. The use of SAT systems to improve the effluents water quality, during the transport of infiltrated water through the unsaturated and saturated zones, can bring a solution for water reclamation, water reuse, and overall as a water resources management tool. The research was carried out under MARSOL project were SAT experiments were executed in a physical (sandbox) model. These experiments aimed to contribute solving the problem of removing rice field contaminants from water, using a soil-aquifer prototype basin to treat water prior to its discharge in Melides lagoon, Portugal. The sandbox model was divided into three sections to test the adsorption and biodegradation capacity of three soil profiles, two of them including soil mixtures of sand with vegetal compost with different layouts. In each section, two tracer experiments were performed with spiked fertilizer and hydrocarbons. To analyse the tracer’s behaviour, monitoring devices were installed in three piezometers for continuous in situ readings of pH, T, EC, ORP and water level, besides water sampling hand-pump for chemical analysis. The results obtained in the experiments gave useful knowledge necessary to build an in situ facility.

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