Water Supply

供水
  • 文章类型: Journal Article
    实现和维持用水的障碍,卫生,卫生,清洁,医疗设施中的废物管理(WASH)包括缺乏支持性的政策环境和充足的资金。虽然存在评估需求和进行初始基础设施改进的指导方针,关于如何制定预算和政策以维持WASH服务的指导很少。我们在塔库尔巴巴市开展了成本核算和宣传活动,尼泊尔,与市政府合作,为卫生保健设施中的WASH制定预算以及运营和维护政策。我们这项研究的目标是(1)描述用于成本计算和宣传的过程和方法,(2)报告在塔库尔巴巴市的8个医疗机构中实现和维持基本WASH服务的成本,(3)报告宣传活动和政策制定的成果。我们应用自下而上的成本计算来列举实现和维护基本WASH服务所需的资源及其成本。实现的年度成本,操作,并维持对WASH服务的基本访问,每个设施从4881美元到9695美元不等。成本调查结果用于编制建议实现的年度预算,操作,维持基本服务,已提交给市政府,并纳入运营和维护政策。迄今为止,市政府采用了该政策,并设立了3831美元的恢复基金,用于基础设施的维修和保养,以及每个设施额外的153美元,用于可自由支配的WASH支出,这些钱在花完的时候要补充。市政当局目前正在全国范围内倡导保健设施中的讲卫生运动,该项目的结果为制定一项国家费用普遍获得服务的计划提供了信息。这项研究旨在为如何收集和应用成本数据以制定政策提供路线图。
    Barriers to achieving and sustaining access to water, sanitation, hygiene, cleaning, and waste management (WASH) in health care facilities include a lack of supportive policy environment and adequate funding. While guidelines exist for assessing needs and making initial infrastructure improvements, there is little guidance on how to develop budgets and policies to sustain WASH services. We conducted costing and advocacy activities in Thakurbaba municipality, Nepal, to develop a budget and operations and maintenance policy for WASH in health care facilities in partnership with the municipal government. Our objectives for this study were to (1) describe the process and methods used for costing and advocacy, (2) report the costs to achieve and maintain basic WASH services in the 8 health care facilities of Thakurbaba municipality, and (3) report the outcomes of advocacy activities and policy development. We applied bottom-up costing to enumerate the resources necessary to achieve and maintain basic WASH services and their costs. The annual costs to achieve, operate, and maintain basic access to WASH services ranged from US$4881-US$9695 per facility. Cost findings were used to prepare annual budgets recommended to achieve, operate, and maintain basic services, which were presented to the municipal government and incorporated into an operations and maintenance policy. To date, the municipality has adopted the policy and established a recovery fund of US$3831 for repair and maintenance of infrastructure and an additional US$153 per facility for discretionary WASH spending, which were to be replenished as they were spent. Advocacy at the national level for WASH in health care facilities is currently being championed by the municipality, and findings from this project have informed the development of a nationally costed plan for universal access. This study is intended to provide a roadmap for how cost data can be collected and applied to inform policy.
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  • 文章类型: Journal Article
    在加拿大北部,通过卡车到水箱系统的市政供水很普遍。家庭满意度和对供水服务的担忧可能会影响用户的偏好和做法。本案例研究探讨了在分散的卡车到水箱系统中家庭用水的观点和挑战。在Kangiqsualujjuaq的北部村庄进行了案例研究,努纳维克(魁北克,加拿大)。65个家庭(占人口的四分之一)完成了纸质问卷。许多家庭(37%)报告不从卡车到水箱系统饮用自来水。氯的味道是一个经常被报道的问题,这些家庭直接从水龙头喝水的可能性大大降低(p=0.002)。同样,前一周报告缺水的家庭(即,至少一次没有自来水)(33%)更有可能对所输送的水量表示不满(rs=0.395,p=0.004)。有趣的是,77%的家庭更喜欢使用替代饮用水源进行饮用,例如水处理厂的公共水龙头,天然来源或瓶装水。该研究强调了考虑家庭观点以减轻与服务中断和使用替代饮酒来源相关的风险的重要性。
    Municipal water supply through truck-to-cistern systems is common in northern Canada. Household satisfaction and concerns about water services likely impact user preferences and practices. This case study explores household perspectives and challenges with regard to domestic access to water in a decentralized truck-to-cistern system. A case study was conducted in the Northern Village of Kangiqsualujjuaq, Nunavik (Quebec, Canada). A paper-based questionnaire was completed by 65 households (one quarter of the population). Many households (37%) reported not drinking tap water from the truck-to-cistern system. Chlorine taste was a frequently reported concern, with those households being significantly less likely to drink water directly from the tap (p = 0.002). Similarly, households that reported a water shortage in the previous week (i.e., no water from the tap at least once) (33%) were more likely to express dissatisfaction with delivered water quantity (rs = 0.395, p = 0.004). Interestingly, 77% of households preferred using alternative drinking water sources for drinking purposes, such as public tap at the water treatment plant, natural sources or bottled water. The study underscores the importance of considering household perspectives to mitigate the risks associated with service disruptions and the use of alternative sources for drinking purposes.
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  • 文章类型: Journal Article
    发育迟缓与环境因素和不良卫生习惯引起的小肠疾病有关。预防发育迟缓应在生命的前1000天进行;即,从怀孕到孩子两岁。本研究旨在分析环境危险因素和母亲个人卫生与6-23月龄儿童发育迟缓发生率的关系。
    本研究采用病例对照设计,共有212个样本(106个病例和106个对照)有目的地登记。数据是通过使用问卷进行访谈收集的。分析使用chisquare检验和多元logistic回归。
    多变量分析的结果表明,与发育迟缓发生率有显著关联的独立变量是获得安全饮用水和产妇卫生习惯。具有显着关系的外部变量是出生长度和喂养方法。
    无法获得安全的饮用水,没有适当的卫生设施,在6-23个月的儿童中,不良的产妇卫生习惯有更高的发育迟缓风险。这项研究的意义包括需要增加获得一个安全的环境和改善母亲的行为作为必要的努力,以防止发育迟缓。
    UNASSIGNED: Stunting is associated with disorders of the small intestines caused by environmental factors and poor hygiene practices. Prevention of stunting should be conducted in the first 1,000 days of life; namely, from conception until the child is two years old. This research aimed to analyze the relationship between environmental risk factors and maternal personal hygiene with the incidence of stunting in children aged 6-23 months.
    UNASSIGNED: This study was conducted using a case-control design, with a total sample of 212 (106 cases and 106 controls) enrolled purposively. Data were collected through interviews using a questionnaire. The analysis used chisquare tests and multiple logistic regression.
    UNASSIGNED: The results of multivariate analysis showed the independent variables that have a significant association on the incidence of stunting are access to safe drinking water and maternal hygiene practices. The external variables that have a significant relationship is birth length and feeding practice.
    UNASSIGNED: Having no access to safe drinking water, not proper sanitation, and poor maternal hygiene practices have a higher risk of stunting in children aged 6-23 months. The implications of this research include the need for increased access to a safe environment and improvement of mother\'s behavior as essential efforts to prevent stunting.
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  • 文章类型: Review
    在面临缺水的地区,特别是在炎热干燥的季节,水的分配至关重要。这通常会受到各种因素的影响,在许多情况下,管理需要大量的时间和精力,努力使其不育。近年来,学者们一直试图研究模糊区间优化模型的适用性,试图解决这个问题。然而,文献综述表明,在应用这些模型时,问题的动态性大多被忽视了。因此,本研究的目的是为西阿塞拜疆省缺水条件下的地表水和地下水资源配置提供模糊区间动态优化模型,伊朗。这样做,设计了水资源配置的优化模型,然后通过去除地表水和地下水资源并分析其在去除这些资源后的性能进行了验证。然后将该模型应用于西阿塞拜疆省十个地区的案例研究中,并在12个时期内确定了每个地区的最佳分配值和供水百分比。结果表明,总需求的增加对供应减少率的影响最大,而地下水工业需求的增加对供应减少率的影响最小。模糊区间规划中不确定性的增加高达50%,将导致随后的地下水开采量增加高达19%,供水量减少高达10%。模糊区间动态模型不确定性的增加会导致地下水开采量增加到略高于10%,供水量减少到0.05%。因此,实现模糊区间动态规划模型将获得更好的收益,并减少不确定性影响。这意味着使用数学模型可以带来更好的收益,并可以为当局管理水资源的更明智的决定提供更好的基础。
    The allocation of water in areas which face shortage of water especially during hot dry seasons is of utmost importance. This is normally affected by various factors, the management of which takes a lot of time and energy with efforts falling infertile in many cases. In recent years, scholars have been trying to investigate the applicability of fuzzy interval optimization models in attempts to address the problem. However, a review of literature indicates that in applicating such models, the dynamic nature of the problem has mostly been overlooked. Therefore, the aim of the present study is to provide a fuzzy interval dynamic optimization model for the allocation of surface and groundwater resources under water shortage conditions in West Azerbaijan Province, Iran. In so doing, an optimization model for the allocation of water resources was designed and then was validated by removing surface and groundwater resources and analyzing its performance once these resources were removed. The model was then applied in the case study of ten regions in West Azerbaijan Province and the optimal allocation values and water supply percentages were determined for each region over 12 periods. The results showed that the increase in total demand has the greatest effect while the increase in groundwater industrial demand has the least effect on the supply reduction rate. The increase of uncertainty up to 50% in the fuzzy interval programming would lead to subsequent increases in groundwater extraction by up to 19% and decreases in water supply by up to 10%. The increase of uncertainty in the fuzzy interval dynamic model would cause an increase in groundwater extraction to slightly more than 10% and a decrease in water supply to 0.05%. Therefore, implementing the fuzzy interval dynamic programming model would result in better gains and would reduce uncertainty effects. This would imply that using a mathematical model can result in better gains and can provide better footings for more informed decisions by authorities for managing water resources.
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  • 文章类型: Journal Article
    AcqueBresciane是一家上市公司,为布雷西亚省的58万多名居民管理综合水循环,在意大利北部,提供饮用水,废水处理,和下水道系统。饮用水系统供应不同类型的地下水,弹簧,和地表水源(来自湖泊和河流),其可用性和质量可能受到气候变化事件的影响。多学科团队,与米兰Bicocca大学合作,制定了一个具体的水安全计划(WSP)风险矩阵,重点是评估与气候相关的危险事件并计算其发生的可能性,还使用专题地图。此外,为了降低剩余风险,在风险矩阵中,提出了可能的控制措施,比如启动应急计划,使用其他水源,储罐,以及与其他供水网络的互连。这项工作显示了一个简单而有效的工具,可应用于饮用水设施评估与气候相关的集水风险,使用WSP风险矩阵,专题地图,和可能的控制措施,以减少水质和可获得性方面的风险,并应对变化。
    Acque Bresciane is a public company that manages the integrated water cycle for more than 580,000 inhabitants in the Province of Brescia, in the north of Italy, providing drinking water, waste water treatment, and sewer systems. Drinking water systems are supplied with different types of groundwater, springs, and surface water sources (from lakes and rivers) whose availability and quality can be affected by climate change events. A multidisciplinary team, in collaboration with the University of Milano Bicocca, developed a specific Water Safety Plan (WSP) risk matrix focusing on the evaluation of climate-related hazardous events and calculation of their likelihood of occurrence, also using thematic maps. Moreover, to reduce the residual risks, in the risk matrix, possible control measures are suggested, such as the activation of an emergency plan, the use of other water sources, storage tanks, and interconnection with other water distribution networks. This work shows a simple and effective tool that can be applied by drinking water utilities to evaluate climate-related catchment risks, using a WSP risk matrix, thematic maps, and possible control measures to reduce risks in terms of water quality and availability and to respond with resilience to changes.
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  • 文章类型: Journal Article
    皮肤利什曼病(CL)是年轻人群中媒介传播疾病的主要原因之一。为了评估环境健康因素与CL发病率的关系,在伊朗东北部进行了一项病例对照研究.
    这项研究是在2020-2021年期间根据三级转诊中心的个人和家庭数据进行的。病例为通过PCR方法诊断为CL的患者;在患者亲属中选择对照,信息是从健康登记系统获得的。1871个科目的人口和社会经济数据,包括年龄,性别,家庭信息和环境健康因素。在各种条件下具有环境因素的多变量模型和CL分别通过单变量和混合多条件逻辑回归拟合。
    参与者包括617例(平均[SD]年龄,13.62[13.72]岁;58.20%男性)和1264名对照(平均[SD]年龄,16.45[15.44]岁;50.40%男性)。结果表明,与地表水相比,井水水源的使用与CL显着相关(比值比[OR]=0.204;95CI,0.13-0.33;P<0.001)。泥泞的房子,毁坏的建筑物或荒地和死水,房屋附近的运河和河流也与CL相关(OR=3.85;95CI,1.66-8.89;P=.002;OR=2.47;95CI,1.76-3.47;P<.001)。此外,发现松树的存在是一个危险因素(OR=3.25;95CI,2.12-4.99;P<.001),废物收集系统的使用也是如此(OR=4.43;95CI,3.32-7.51;P<.001)。
    与房屋相关的环境因素与CL显著相关,并且可能代表CL疾病的可改变的危险因素。
    UNASSIGNED: Cutaneous leishmaniasis (CL) is one of the main causes of vector-born diseases in younger population. To evaluate the association of environmental health factors on the odds of CL incidence, a case-control study was conducted in northeastern Iran.
    UNASSIGNED: This study was conducted within 2020-2021 based on individual and household data from a tertiary referral center. Cases were patients diagnosed with CL by PCR method; controls were selected among the patients\' relatives, and information was obtained from a health registry system. Demographic and socioeconomic data of 1871 subjects, included age, sex, household information and environmental health factors. Multivariable models with environmental factors in various conditions and CL were separately fit by univariate and mixed multiple unconditional logistic regression.
    UNASSIGNED: Participants included 617 cases (mean [SD] age, 13.62[13.72] years; 58.20% male) and 1264 controls (mean [SD] age, 16.45[15.44] years; 50.40% male). Results revealed that the use of well-water sources compared to surface water is significantly associated with CL (odds ratio [OR]=0.204; 95%CI, 0.13-0.33;P<0.001). Muddy houses, ruined buildings or wastelands and stagnant water, canals and rivers near the houses were also associated with CL (OR=3.85; 95%CI, 1.66-8.89; P=.002; OR=2.47; 95%CI, 1.76-3.47; P<.001). Besides, existence of pine tree was found to be a risk factor (OR=3.25; 95%CI, 2.12-4.99; P<.001) and similarly for the use of waste collection system (OR=4.43; 95%CI, 3.32-7.51; P<.001).
    UNASSIGNED: Environmental factors related to houses were significantly associated with CL and may represent the modifiable risk factors of CL disease.
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  • 文章类型: Journal Article
    由于人类世的到来,人类对环境的影响越来越深远。生态风险评价(ERA)作为一种量化生态问题的方法,可以为决策者提供支持,将生态系统服务纳入ERA已成为热门话题。在这项研究中,从风险捆绑的角度,在“损失概率”范式下提出了一个ERA框架。结果表明,山西省的生态保护举措是有效的,具有低风险束的流域数量显着增加(从16.09%增加到34.49%),并且与造林的关键区域基本重叠。然而,简单的造林活动的影响可能不再像以前那样重要,植树造林与水之间的关系变得越来越矛盾。同时,城市扩张和自然保护之间的冲突正在加剧,栖息地退化风险逐渐两极分化,高碳排放和生境退化为主的风险束显著增加(从15.88%增加到33.54%)。加强城市绿地建设,控制人类活动的扩展,可能是山西省生态建设的下一个重点。本研究丰富了ERA框架,为山西省的可持续发展提供了建议。
    Humans are having an increasingly profound impact on the environment along with the advent of the Anthropocene. Ecological risk assessment (ERA) as a method to quantify ecological problems can provide support for decision-makers, and it is one of key issues to integrate ecosystem services into ERA. In this study, an ERA framework was proposed under the loss-probability paradigm from the perspective of ecosystem services risk bundles. The results showed that initiatives aimed at ecological protection in Shanxi Province had been effective, the number of watersheds with low-risk bundles increased significantly (from 16.09% to 34.49%) and the watersheds basically overlapped with key forestation areas. However, the effects of forestation activities may no longer be as significant as they once were, as the relationship between forestation and water supply was becoming increasingly contradictory. Meanwhile, the conflict between urban expansion and natural ecosystem protection was intensifying, habitat degradation risks were gradually polarized, and the risk bundles dominated by high carbon emission and habitat degradation were increasing significantly (from 15.88% to 33.54%). Strengthening the construction of urban green space and controlling the expansion of human activities may be the next focus of ecological conservation in Shanxi Province. This study enriched the ERA framework with an ecosystem services risk bundle approach.
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  • 文章类型: Journal Article
    水资源短缺已成为威胁城市水安全的全球严峻挑战之一。要系统地了解城市水资源利用情况,本研究基于三个维度建立了一个新的城市水资源综合核算框架:“整个城市,部门层面,和部门间互动“。为了使这个会计框架能够应用于大多数城市,提出了一种在一般地级市规模上编制输入输出(IO)表的方法,以获取所需的核心数据。东莞,广东省的一个地级市,中国,以其发达的制造业而闻名,但缺水,选择作为案例研究来测试该方法的有效性。结果表明,2012-2017年东莞市用水总量下降了7.2%,这得益于经济的稳定增长。此外,“农业”部门的直接用水系数明显高于其他部门,而制造业的间接用水系数在2017年超过了直接用水系数。此外,东莞各部门之间有两条主要的虚拟水流路径,有助于节约用水。本研究提出的一般地级市水资源综合核算框架适用于水资源管理,不仅可以优化城市水资源配置,还可以减少环境污染和生态破坏。然而,仍有必要进一步优化IO表的编制,通过收集更详细的行业数据和进出口数据,更好地支持未来研究中具体节水措施的制定。本研究结果可为世界类似东莞的一般规模城市水资源管理提供重要的实践参考信息。
    Water scarcity has become one of the serious global challenges threatening urban water security. To systematically understand the utilization of water resources in cities, this study established a novel comprehensive accounting framework of urban water resources based on three dimensions: \"the entire city, sectoral level, and intersectoral interactions\". To make this accounting framework that can be applied to the majority of cities, a method for compiling input-output (IO) tables at the general prefecture-level city scale was proposed to obtain the needed core data. Dongguan, a prefecture-level city in Guangdong Province, China, known for its well-developed manufacturing industries but water scarcity, was chosen as a case study to test the effectiveness of the method. The results indicated the total water use in Dongguan decreased by 7.2% during 2012-2017, which benefited from steady economic growth. Besides, the \"agriculture\" sector has significantly higher direct water use coefficient than other sectors, while the indirect water use coefficient of the manufacturing sector exceeded the direct water use coefficient in 2017. In addition, there are two major virtual water flow paths among sectors in Dongguan, which are helpful to water conservation. The comprehensive water resources accounting framework proposed in this study for general prefecture-level cities is applicable to water resource management, enabling not only the optimization of water resource allocation in urban areas but also the reduction of environmental pollution and ecological damage. Nevertheless, it is still necessary to further optimize the compilation of IO tables and better support the formulation of specific water-saving measures in the future research by collecting more detailed industry data and import-export data. These results of this study can provide important practical reference information for water resource management in general-scale cities similar to Dongguan in the world.
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  • 文章类型: Journal Article
    由于多部门需求的增长和气候变化的影响,水正成为一种越来越稀缺的资源。在干旱期间,比例规则是灌溉系统中应用最广泛的水分配方法。然而,这种方法不能保证有效的水资源分配或提供公平的水资源分配方法。本文旨在验证通过用基于优先规则的方法代替基于比例规则的水分配方法是否可以改善水资源的分配并最大程度地减少水资源短缺的负面经济影响。这项研究的最终目标是设计一种能够在干旱条件下保证有效水资源重新分配的水价方案。因此,对意大利南部最大的灌溉区进行了一项实验,由Capitanata开垦和灌溉委员会(CBC)覆盖。为了模拟所提出的机制的影响,实现了一个积极的数学规划模型。研究结果表明,在水资源短缺的情况下,优先机制有可能提高整体经济效率。然而,结果还指出,需要优化设计差异化的水价方案。
    Water is becoming an increasingly scarce resource due to growing multi-sector demand and the effects of climate change. During droughts, the proportional rule is the most widespread water allocation method applied in irrigation systems. However, this method fails to guarantee efficient water allocation or to provide a fair method of water allocation. This paper aims to verify whether by replacing the water allocation methods based on a proportional rule with methods based on a priority rule could improve the allocation of water resources and minimize the negative economic impacts of water shortages. The ultimate objective of this research is to design a water pricing scheme capable of guaranteeing efficient water reallocation during drought conditions. Therefore, an experiment was carried out for the largest irrigated area in southern Italy, covered by the Capitanata Reclamation and Irrigation board (CBC). A positive mathematical programming model was implemented in order to simulate the effects of the proposed mechanism. The findings show that priority mechanisms have the potential to improve overall economic efficiency in the event of water shortages. However, results also point to the need for optimal design of a differentiated water pricing scheme.
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  • 文章类型: Journal Article
    水循环中各种过程所需的能量可能会对经济和环境产生重大影响。因此,有效的能源管理对于城市供水系统的可持续运行至关重要。通过在这些设施中安装能量回收技术,有可能通过节约能源来获得基础设施设计的好处。在这项研究中,提出了一种评估区域计量区入口处能量回收的新方法,以穆尔西亚市(西班牙)为例。该方法基于创建城市供水系统的详细模型并通过实验性测量活动校准该模型。然后,通过两个不同的能量估计器分析水力潜力回收的评估,一个考虑最小可用净水头,另一个假设可变净水头。结果表明,有几个点可以安装涡轮机,它们中的大多数在1000-5000千瓦时之间恢复,这可用于覆盖每年约24-120平方米的学校或10-50个交通信号灯的此类区域的能源消耗。此外,在某些方面,它可以恢复到14500千瓦时。即使这些值并不高,回收的能量可以用于附近的电力负载的自我消耗,在降低系统压力的时候,从而导致泄漏减少。此外,这种能源回收不会降低其他上游能源回收建议的潜力,例如用涡轮代替减压阀。为应用所提出的方法而开发的脚本可在研究人员社区的EPANET-Octave文件交换中获得。
    The energy required for various processes in the water cycle can have significant economic and environmental impacts. Therefore, efficient energy management in urban water supply systems is crucial for a sustainable operation. By installing energy recovery technologies in these facilities, it is possible to reap the benefits of the infrastructure design by saving energy. In this study, a new methodology to assess the energy recovery at the inlets of district metered areas is presented, considering the city of Murcia (Spain) as case study. This methodology is based on creating a detailed model of city water supply system and calibrating such model with an experimental campaign of measurements. Then, the assessment of the hydraulic potential recovery is analysed through two different energy estimators, one considering the minimum available net head and the other assuming a variable net head. Results show that there are several points where turbines could be installed, most of them recovering in between 1000-5000 kWh, which could be used to cover the yearly energy consumption of about 24-120 m2 of a school or 10-50 traffic lights of such area. Moreover, in some points it could be recovered up to 14500 kWh. Even though these values are not high, the energy recovered could be used for self-consumption of nearby electrical loads, at the time that reduces the pressure in the system, thus leading to leak reductions. Moreover, this kind of energy recovery does not reduce the potential of other proposals for upstream energy recovery, such as replacing pressure reduction valves with turbines instead. The scripts developed to apply the proposed methodology are available in EPANET-Octave file exchange for the researcher community.
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