Water Pollution

水污染
  • 文章类型: Journal Article
    最近在孔敬省进行的一项研究,泰国,评估了旨在改善水质和解决主要水体周围社区相关健康问题的技术辅助干预措施的有效性。该干预措施针对与水污染相关的健康问题,包括慢性肾病,皮肤状况,高血压,神经症状。该研究包括586名居民的水质评估和健康评估,并在13个社区实施了学习创新平台(LIP)。结果显示社区有显著改善,包括高血压和皮肤相关健康问题的减少,以及提高社区对实施简单水质评估和处理的认识和熟练程度。这项研究证明了全面的价值,技术驱动的社区方法,有效提高水质和健康结果,并在管理环境健康风险方面提高社区意识和自给自足。
    A recent study conducted in Khon Kaen Province, Thailand, evaluated the effectiveness of a technology-assisted intervention aimed at improving water quality and addressing related health issues in communities around key water bodies. The intervention targeted health concerns associated with water contamination, including chronic kidney diseases, skin conditions, hypertension, and neurological symptoms. The study included water quality assessments and health evaluations of 586 residents and implemented a Learning Innovation Platform (LIP) across 13 communities. Results showed significant improvements in the community, including a decrease in hypertension and skin-related health issues, as well as enhanced community awareness and proficiency in implementing simple water quality assessments and treatment. The study demonstrated the value of a comprehensive, technology-driven community approach, effectively enhancing water quality and health outcomes, and promoting greater community awareness and self-sufficiency in managing environmental health risks.
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  • 文章类型: Journal Article
    心血管疾病是全球死亡的重要原因,和他们的流行可以被一系列的环境因素放大。这篇综述文章批判性地评估了已发表的有关各种环境因素的流行病学和病理生理机制的信息,例如空气室内和室外空气污染,水污染,气候变化,和土壤污染。讨论了减轻这些影响的预防措施,包括公共卫生对策,并在我们对未来研究的知识中存在差距。
    Cardiovascular diseases are a significant cause of mortality worldwide, and their prevalence can be amplified by a range of environmental factors. This review article critically evaluated the published information on the epidemiology and pathophysiological mechanisms of various environmental factors such as air indoor and outdoor air pollution, water pollution, climate change, and soil pollution. Preventative measures to mitigate these effects including public health responses are discussed with gaps in our knowledge for future studies.
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  • 文章类型: Journal Article
    地中海地区面临着一些环境变化和污染问题。由于其复杂的生殖生物学以及对成功繁殖的特定环境线索的依赖,因此对这些挑战特别敏感。野生种群与气候变化的三位一体作斗争,环境污染,过度捕捞,会严重影响生殖成功和种群动态。在养殖物种中,影响繁殖的非生物因素更容易控制,尽管为养殖硬骨鱼寻找传统饮食的替代品对于增强亲鱼健康至关重要,生殖成功,以及水产养殖部门的可持续性。解决这些挑战涉及正在进行的研究制定专门的饮食,优化喂养策略,并开发替代和可持续的饲料成分。为了更深入地理解这些挑战,采用模型物种的研究已经成为关键工具。这些模型由于其明确的生理学而在理解生殖机制方面提供了优势,遗传可操作性,易于操纵。然而,在提供宝贵见解的同时,它们对不同物种的适用性仍然受到类群固有变化和复杂环境相互作用过度简化的限制,从而限制了科学发现的推断。弥合这些差距需要多学科的方法,强调野生物种的保护工作和为水产养殖量身定制的营养策略,从而促进地中海的可持续硬骨鱼繁殖。
    The Mediterranean region is facing several environmental changes and pollution issues. Teleosts are particularly sensitive to these challenges due to their intricate reproductive biology and reliance on specific environmental cues for successful reproduction. Wild populations struggle with the triad of climate change, environmental contamination, and overfishing, which can deeply affect reproductive success and population dynamics. In farmed species, abiotic factors affecting reproduction are easier to control, whereas finding alternatives to conventional diets for farmed teleosts is crucial for enhancing broodstock health, reproductive success, and the sustainability of the aquaculture sector. Addressing these challenges involves ongoing research into formulating specialized diets, optimizing feeding strategies, and developing alternative and sustainable feed ingredients. To achieve a deeper comprehension of these challenges, studies employing model species have emerged as pivotal tools. These models offer advantages in understanding reproductive mechanisms due to their well-defined physiology, genetic tractability, and ease of manipulation. Yet, while providing invaluable insights, their applicability to diverse species remains constrained by inherent variations across taxa and oversimplification of complex environmental interactions, thus limiting the extrapolation of the scientific findings. Bridging these gaps necessitates multidisciplinary approaches, emphasizing conservation efforts for wild species and tailored nutritional strategies for aquaculture, thereby fostering sustainable teleost reproduction in the Mediterranean.
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  • 文章类型: Journal Article
    本研究的目的是评估拉合尔选定城市地区的饮用水质量,并通过解决基本饮用水质量参数来了解公共卫生状况。从拉合尔地区的两个选定区域的地下水中收集了总共50个自来水样品,即,Gulshan-e-Ravi(站点1)和Samanabad(站点2)。在实验室中分析水样以阐明物理化学参数,包括pH值,浊度,温度,总溶解固体(TDS),电导率(EC),溶解氧(DO),总硬度,镁硬度,和钙硬度。这些物理化学参数用于检查水质指数(WQI)和合成污染指数(SPI),以表征水质。将选定的理化参数的结果与世界卫生组织(WHO)指南进行比较,以确定饮用水的质量。基于GIS的方法用于绘制水质图,WQI,SPI。本研究的结果表明,温度的平均值,pH值,两个研究地点的DO均在WHO23.5°C的指导范围内,7.7和6.9mg/L,分别。站点1的TDS水平为192.56mg/L(在WHO指南范围内),在站点2中,发现612.84mg/L(高于WHO指南),分别。在25.04至65.732mg/L范围内观察到位置1和位置2的钙硬度,但是,镁硬度值高于WHO指南。水质差的主要原因是陈旧,选定区域的供水管道磨损和废物处置不当。站点1的平均WQI为59.66,站点2的平均WQI为77.30。结果表明,地点1的水质被归类为“差”,地点2的水质被归类为“非常差”。有必要解决水质差的问题,并提高公众对饮用水质量及其相关健康影响的认识。
    The aim of the present study was to assess the drinking water quality in the selected urban areas of Lahore and to comprehend the public health status by addressing the basic drinking water quality parameters. Total 50 tap water samples were collected from groundwater in the two selected areas of district Lahore i.e., Gulshan-e-Ravi (site 1) and Samanabad (site 2). Water samples were analyzed in the laboratory to elucidate physico-chemical parameters including pH, turbidity, temperature, total dissolved solids (TDS), electrical conductivity (EC), dissolved oxygen (DO), total hardness, magnesium hardness, and calcium hardness. These physico-chemical parameters were used to examine the Water Quality Index (WQI) and Synthetic Pollution Index (SPI) in order to characterize the water quality. Results of th selected physico-chemical parameters were compared with World Health Organization (WHO) guidelines to determine the quality of drinking water. A GIS-based approach was used for mapping water quality, WQI, and SPI. Results of the present study revealed that the average value of temperature, pH, and DO of both study sites were within the WHO guidelines of 23.5 °C, 7.7, and 6.9 mg/L, respectively. The TDS level of site 1 was 192.56 mg/L (within WHO guidelines) and whereas, in site 2 it was found 612.84 mg/L (higher than WHO guidelines), respectively. Calcium hardness of site 1 and site 2 was observed within the range from 25.04 to 65.732 mg/L but, magnesium hardness values were higher than WHO guidelines. The major reason for poor water quality is old, worn-out water supply pipelines and improper waste disposal in the selected areas. The average WQI was found as 59.66 for site 1 and 77.30 for site 2. Results showed that the quality of the water was classified as \"poor\" for site 1 and \"very poor \" for site 2. There is a need to address the problem of poor water quality and also raise the public awareness about the quality of drinking water and its associated health impacts.
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  • 文章类型: Journal Article
    背景:缅甸伊洛瓦底盆地,一个关键的经济区,由于不可持续的农业实践,面临严重的生态退化。这些做法对人类健康和海洋生物多样性构成重大威胁。尽管缅甸政府努力实施生物多样性保护政策,但环境威胁依然存在。这项研究探讨了伊洛瓦底盆地农民对环境保护政策的有限遵守情况及其对可持续农业实践和生态保护的影响。
    方法:本研究采用探索性现象学方法,利用半结构化,对政府官员和农民的深入采访(N=30)。使用Atlas23对收集的数据进行专题分析。
    结果:初步调查结果表明,农民对这些政策的认识和理解存在差距,受到资金不足的阻碍,通信基础设施差,和不协调的政策监测。这些因素和现有的动荡导致自上而下的政策方法忽视了一线利益相关者。这项研究表明,需要明确的利益相关者角色,充足的政策融资,和不同的沟通策略,以有效执行环境政策并保护人类和海洋生物。
    结论:缅甸的环境政策缺陷归因于政府监督和利益相关者参与不足。为了减轻污染和保护流域生态系统,政府必须划定利益相关者的责任,分配适当的政策资金,并与农民采取不同的沟通方式。
    BACKGROUND: The Ayeyarwady Basin in Myanmar, a critical economic zone, faces severe ecological degradation due to unsustainable agricultural practices. These practices pose significant threats to human health and marine biodiversity. Environmental threats persist despite the Myanmar government\'s efforts to implement biodiversity protection policies. This research explores the limited compliance with environmental protection policies among farmers in the Ayeyarwady Basin and its implications for sustainable agricultural practices and ecological conservation.
    METHODS: This research employs an exploratory phenomenological approach, utilizing semi-structured, in-depth interviews with government officials and farmers (N = 30). The data collected were subjected to thematic analysis using Atlas 23.
    RESULTS: Preliminary findings reveal a gap in farmers\' awareness and understanding of these policies, hindered by insufficient financing, poor communication infrastructure, and uncoordinated policy monitoring. These factors and existing unrest contribute to a top-down policy approach that neglects frontline stakeholders. The study suggests the need for clear stakeholder roles, adequate policy financing, and diverse communication strategies to effectively implement environmental policies and protect human and marine life.
    CONCLUSIONS: Environmental policy shortcomings in Myanmar are attributable to governmental oversight and insufficient stakeholder engagement. To mitigate pollution and safeguard river basin ecosystems, the government must delineate stakeholder responsibilities, allocate appropriate policy funding, and adopt varied communication approaches with farmers.
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  • 文章类型: Journal Article
    紫草属植物是一个复杂的系统,是敏感的环境因素,如供水,pH值,温度,光,辐射,杂质,和营养可用性。它可以用作环境变化的生物监测器;但是,生物测定是耗时的,并且具有很强的人为干扰因素,可能会根据进行分析的人而改变结果。我们已经开发了计算机视觉模型来研究Tradescantia克隆4430植物雄蕊毛细胞的颜色变化,由于空气污染和土壤污染,可以强调。这项研究引入了一个新的数据集,Trad-204,其包含来自Tradescantia克隆4430的单细胞图像,在Tradescantia雄毛突变生物测定(Trad-SHM)期间捕获。数据集包含来自两个实验的图像,一个侧重于颗粒物对空气的污染,另一个侧重于被柴油污染的土壤。两个实验都是在库里蒂巴进行的,巴西,2020年至2023年。图像代表不同形状的单细胞,尺寸,和颜色,反映植物对环境压力的反应。开发了一种自动分类任务来区分蓝色和粉红色细胞,这项研究探索了一个基线模型和三个人工神经网络(ANN)架构,即,TinyVGG,VGG-16和ResNet34。紫丁香对土壤中的空气颗粒物浓度和柴油都具有敏感性。结果表明,残差网络体系结构在训练集和测试集上的准确性均优于其他模型。数据集和发现有助于理解植物细胞对环境胁迫的反应,并为植物细胞自动图像分析的进一步研究提供宝贵的资源。讨论强调了膨大压力对细胞形状的影响以及对植物生理学的潜在影响。神经网络架构之间的比较与以前的研究一致,强调ResNet模型在图像分类任务中的卓越性能。粉红色细胞的人工智能识别提高了计数准确性,从而避免了由于不同颜色感知而造成的人为错误,疲劳,或者注意力不集中,除了促进和加快分析过程。总的来说,该研究提供了对植物细胞动力学的见解,并为未来研究如细胞形态变化提供了基础。这项研究证实,生物监测应被视为政治行动的重要工具,是风险评估和制定与环境有关的新公共政策的相关问题。
    Tradescantia plant is a complex system that is sensible to environmental factors such as water supply, pH, temperature, light, radiation, impurities, and nutrient availability. It can be used as a biomonitor for environmental changes; however, the bioassays are time-consuming and have a strong human interference factor that might change the result depending on who is performing the analysis. We have developed computer vision models to study color variations from Tradescantia clone 4430 plant stamen hair cells, which can be stressed due to air pollution and soil contamination. The study introduces a novel dataset, Trad-204, comprising single-cell images from Tradescantia clone 4430, captured during the Tradescantia stamen-hair mutation bioassay (Trad-SHM). The dataset contain images from two experiments, one focusing on air pollution by particulate matter and another based on soil contaminated by diesel oil. Both experiments were carried out in Curitiba, Brazil, between 2020 and 2023. The images represent single cells with different shapes, sizes, and colors, reflecting the plant\'s responses to environmental stressors. An automatic classification task was developed to distinguishing between blue and pink cells, and the study explores both a baseline model and three artificial neural network (ANN) architectures, namely, TinyVGG, VGG-16, and ResNet34. Tradescantia revealed sensibility to both air particulate matter concentration and diesel oil in soil. The results indicate that Residual Network architecture outperforms the other models in terms of accuracy on both training and testing sets. The dataset and findings contribute to the understanding of plant cell responses to environmental stress and provide valuable resources for further research in automated image analysis of plant cells. Discussion highlights the impact of turgor pressure on cell shape and the potential implications for plant physiology. The comparison between ANN architectures aligns with previous research, emphasizing the superior performance of ResNet models in image classification tasks. Artificial intelligence identification of pink cells improves the counting accuracy, thus avoiding human errors due to different color perceptions, fatigue, or inattention, in addition to facilitating and speeding up the analysis process. Overall, the study offers insights into plant cell dynamics and provides a foundation for future investigations like cells morphology change. This research corroborates that biomonitoring should be considered as an important tool for political actions, being a relevant issue in risk assessment and the development of new public policies relating to the environment.
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  • 文章类型: Journal Article
    全球在水源中存在药物污染物代表了一个新兴的公共卫生问题。最近的研究强调了解决这类新兴污染物的紧迫性。在这种情况下,我们的工作重点是合成复合材料,FexOy/MAF-32,通过简化的一锅反应过程,作为双氯芬酸的吸附剂,一种新兴的环境污染物,经常在淡水环境中发现,与对鱼类和贻贝等几种生物的潜在毒性有关。进行了彻底的表征以阐明复合材料的结构组成。该材料具有归因于其超顺磁性能的磁性,这有利于提高双氯芬酸后复合吸附的回收效率。我们的研究还涉及FexOy/MAF-32和非磁性对应物之间的比较分析,仅由2-乙基咪唑锌聚合物组成。该比较旨在辨别在由配位聚合物促进的污染物去除过程中引入磁性氧化铁纳米颗粒的相对优点和缺点。我们的发现表明,即使是最低限度的氧化铁纳米颗粒的掺入也能大大提高复合材料在污染物吸附方面的整体性能。
    The global presence of pharmaceutical pollutants in water sources represents a burgeoning public health concern. Recent studies underscore the urgency of addressing this class of emerging contaminants. In this context, our work focuses on synthesizing a composite material, FexOy/MAF-32, through a streamlined one-pot reaction process, as an adsorbent for diclofenac, an emerging environmental contaminant frequently found in freshwater environments and linked to potential toxicity towards several organisms such as fish and mussels. A thorough characterization was performed to elucidate the structural composition of the composite. The material presents magnetic properties attributed to its superparamagnetic behavior, which facilitates the recovery efficiency of the composite post-diclofenac adsorption. Our study further involves a comparative analysis between the FexOy/MAF-32 and a non-magnetic counterpart, comprised solely of 2-ethylimidazolate zinc polymer. This comparison aims to discern the relative advantages and disadvantages of incorporating magnetic iron oxide nanoparticles in the contaminant removal process facilitated by a coordination polymer. Our findings reveal that even a minimal incorporation of iron oxide nanoparticles substantially enhanced the composite\'s overall performance in pollutant adsorption.
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  • 文章类型: Journal Article
    切萨皮克湾流域代表了与农业非点源污染有关的治理挑战,更一般地说,复杂的多参与者环境中的可持续资源治理。我们评估宾夕法尼亚州中部奶农开展的最佳管理实践(BMP)的信息流,分水岭的一个分区域。我们采用混合方法,结合社会网络分析,BMP消息传递的分析(即信息源,流量,及其影响),和利益相关者访谈的定性内容分析。通过网络中心性度量确定了关键战略参与者,如节点度,中间性中心性,和聚类系数。BMP消息及其来源的感知影响/可信度(由农民),允许识别BMP消息扩散的战略入口点。最后,利益相关者的归纳编码过程\'访谈揭示了采用BMP的主要障碍和机会。我们展示了如何改善BMPs吸收的政策干预目标,通过在利益相关者之间更好地分配切入点。我们的结果揭示了治理差距和机会,在此基础上,我们为更好的量身定制的政策干预提供见解。我们通过建立网络多样性和参与者的互补性,提出了优化政策组合的覆盖范围和BMP消息传播的策略,并针对特定的BMPs和行为者进行干预。我们建议(i)保护激励措施可以将供应链参与者作为保护中介;(ii)粪便管理计划的合规性控制可以由认可的私人认证机构进行;(iii)政策应侧重于激励农民之间的互动(例如,农民的流动性,培训,知识交流,并通过财务或非金钱补偿参与多方利益相关者的合作);(iv)集体激励措施可以帮助更好地协调景观或(子)流域规模的保护工作;(v)所有相关利益相关者(包括农民)应协调一致并纳入讨论,命题,政策的共同设计和决策过程,以便考虑到他们各自的利益和责任。
    The Chesapeake Bay watershed is representative of governance challenges relating to agricultural nonpoint source pollution and, more generally, of sustainable resources governance in complex multi-actor settings. We assess information flows around Best Management Practices (BMPs) undertaken by dairy farmers in central Pennsylvania, a subregion of the watershed. We apply a mixed-method approach, combining Social Network Analysis, the analysis of BMP-messaging (i.e. information source, flow, and their influences), and qualitative content analysis of stakeholders\' interviews. Key strategic actors were identified through network centrality measures such as degree of node, betweenness centrality, and clustering coefficient. The perceived influence/credibility (by farmers) of BMP-messages and their source, allowed for the identification of strategic entry points for BMP-messages diffusion. Finally, the inductive coding process of stakeholders\' interviews revealed major hindrances and opportunities for BMPs adoption. We demonstrate how improved targeting of policy interventions for BMPs uptake may be achieved, by better distributing entry-points across stakeholders. Our results reveal governance gaps and opportunities, on which we draw to provide insights for better tailored policy interventions. We propose strategies to optimize the coverage of policy mixes and the dissemination of BMP-messages by building on network diversity and actors\' complementarities, and by targeting intervention towards specific BMPs and actors. We suggest that (i) conservation incentives could target supply chain actors as conservation intermediaries; (ii) compliance-control of manure management planning could be conducted by accredited private certifiers; (iii) policy should focus on incentivizing inter-farmers interaction (e.g. farmers\' mobility, training, knowledge-exchange, and engagement in multi-stakeholders collaboration) via financial or non-pecuniary compensation; (iv) collective incentives could help better coordinate conservation efforts at the landscape or (sub-)watershed scale; (v) all relevant stakeholders (including farmers) should be concerted and included in the discussion, proposition, co-design and decision process of policy, in order to take their respective interests and responsibilities into account.
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  • 文章类型: Journal Article
    在2013年11月的污染期间,从Szamos河(匈牙利)收集了三种具有不同饮食和栖息地偏好的小鱼:草食性,底栖nase(软骨瘤),食肉动物,底栖barbel(Barbusbarbus),和杂食性的,中上层chub(头颅)。我们的研究旨在评估这些元素在不同饮食和栖息地偏好的物种之间的积累,以及它们在生物监测工作中的潜在作用。Ca,K,Mg,Na,Cd,Cr,Cu,Fe,Mn,Pb,Sr,并分析了肌肉中的锌浓度,ill,和肝脏使用MP-AES。肌肉和ill的Cr浓度,Cu,Fe,锌随营养水平的增加而增加。同时,在与栖息地偏好有关的微量元素模式之间发现了一些差异。微量元素,包括Cd,Pb,Zn,超过了水中的阈值浓度,主要在中上层chub的肌肉和g中表现出较高的积累。此外,沉积物中微量元素的浓度升高(Cr,Cu,Mn)在底栖nase和barbel中表现出更高的积累。我们的研究结果表明,栖息地偏好是青少年生物指示能力的关键因素,倡导同时使用中上层和底栖鱼类来评估水和沉积物污染状况。
    Juveniles of three cyprinids with various diets and habitat preferences were collected from the Szamos River (Hungary) during a period of pollution in November 2013: the herbivorous, benthic nase (Chondrostoma nasus), the benthivorous, benthic barbel (Barbus barbus), and the omnivorous, pelagic chub (Squalius cephalus). Our study aimed to assess the accumulation of these elements across species with varying diets and habitat preferences, as well as their potential role in biomonitoring efforts. The Ca, K, Mg, Na, Cd, Cr, Cu, Fe, Mn, Pb, Sr, and Zn concentration was analyzed in muscle, gills, and liver using MP-AES. The muscle and gill concentrations of Cr, Cu, Fe, and Zn increased with trophic level. At the same time, several differences were found among the trace element patterns related to habitat preferences. The trace elements, including Cd, Pb, and Zn, which exceeded threshold concentrations in the water, exhibited higher accumulations mainly in the muscle and gills of the pelagic chub. Furthermore, the elevated concentrations of trace elements in sediments (Cr, Cu, Mn) demonstrated higher accumulation in the benthic nase and barbel. Our findings show habitat preference as a key factor in juvenile bioindicator capability, advocating for the simultaneous use of pelagic and benthic juveniles to assess water and sediment pollution status.
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  • 文章类型: Journal Article
    地下水质量可能受到自然或人为影响的影响。这项研究调查了库马西3个郊区的人工挖井的管理和特征如何影响水质,加纳,采用定性和定量相结合的研究方法。描述性分析,包括频率和百分比,描绘了受访者的人口统计概况。箱线图说明了物理化学参数的分布(总溶解固体[TDS],电导率[EC],浊度,溶解氧[DO],和温度)。因子分析评估了这些参数中的主导因素。聚类分析(层次聚类)利用采样点作为变量来建立水理化参数的空间变化。Cramer的V相关检验探讨了人口统计学变量与个人对水管理的看法之间的关系。单因素方差分析验证了物理化学参数之间的显著平均差异。Logistic回归模型评估了选定井特征的影响(例如,盖和围裙)在TDS上,pH值,温度,浊度,和做。调查结果显示,靠近人类住区会影响水质,增加的浊度与未维护的覆盖物有关,显著影响水质(P<0.05)。超过80%的水井位于污染源10至30米范围内,65.63%位于低地,87.5%未维护。其他主要污染源包括塑料桶/绳索的使用(87.50%),有缺陷的衬里(75%),和停机坪裂缝(59.37%)。大肠杆菌的存在,总大肠菌群,粪便大肠杆菌使这些井无法饮用。因子分析将90.85%的基于时间和空间的差异归因于有机颗粒分解因素。然而,Cramer的V相关分析发现,很难在人口统计学因素关联与个人对人工挖井管理的看法之间建立关联。鼓励推广手工挖井施工和维护标准,以确保井得到适当建造并免受污染源的影响。
    Underground water quality can be affected by natural or human-made influences. This study investigates how the management and characteristics of hand-dug wells impact water quality in 3 suburbs of Kumasi, Ghana, using a combination of qualitative and quantitative research methods. Descriptive analysis, including frequency and percentages, depicted the demographic profiles of respondents. Box plot diagrams illustrated the distribution of physicochemical parameters (Total Dissolved Solid [TDS], Electrical Conductivity [EC], Turbidity, Dissolved Oxygen [DO], and Temperature). Factor analysis evaluated dominant factors among these parameters. Cluster analysis (hierarchical clustering) utilized sampling points as variables to establish spatial variations in water physicochemical parameters. Cramer\'s V correlation test explored relationships between demographic variables and individual perceptions of water management. One-way ANOVA verified significant mean differences among the physicochemical parameters. Logistic regression models assessed the influence of selected well features (e.g., cover and apron) on TDS, pH, Temperature, Turbidity, and DO. The findings revealed that proximity to human settlements affects water quality, and increasing turbidity is associated with unmaintained covers, significantly impacting water quality (P < .05). Over 80% of wells were located within 10 to 30 m of pollution sources, with 65.63% situated in lower ground and 87.5% being unmaintained. Other significant contamination sources included plastic bucket/rope usage (87.50%), defective linings (75%), and apron fissures (59.37%). Presence of E. coli, Total coliform, and Faecal coliform rendered the wells unpotable. Factor analysis attributed 90.85% of time-based and spatial differences to organic particle decomposition factors. However, Cramer\'s V correlation analysis found establishing association between demographic factor associations with individual perceptions of hand-dug well management difficult. It is encouraged to promote hand-dug well construction and maintenance standards to ensure that wells are properly built and protected from contamination sources.
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