Prevention and Control Strategies of Nosocomial Infection and Effectiveness Evaluation in a Tertiary Teaching Hospital during the Epidemic of COVID-19

Objective: To evaluate the role of prevention and control strategies for nosocomial infection in a tertiary teaching hospital during the sudden outbreak of Corona Virus Disease 2019 (COVID-19). Methods: The hospital initiated an emergency plan involving multi-departmental defense and control. It adopted a series of nosocomial infection prevention and control measures, including strengthening pre-examination and triage, optimizing the consultation process, improving the hospital’s architectural composition, implementing graded risk management, enhancing personal protection, and implementing staff training and supervision. Descriptive research was used to evaluate the short-term effects of these in-hospital prevention and control strategies. The analysis compared changes in related evaluation indicators between January 24, 2020 and February 12, 2020 (Chinese Lunar New Year’s Eve 2020 to lunar January 19) and the corresponding lunar period of the previous year. Results: Compared to the same period last year, the outpatient fever rate increased by 1.85-fold (P P Conclusion: The nosocomial infection prevention and control strategies implemented during this specific period improved the detection and control abilities for the COVID-19 source of infection and enhanced the compliance with measures. This likely contributed significantly to avoiding the occurrence of nosocomial infection.

Research on Prevention and Control of Environmental Pollution in Building Construction

The quality of human life has been greatly improved with the rapid development of the market economy.However,at the same time,people are paying more attention to the problems caused by environmental pollution.As a result,there is an increase in environmental awareness.At the present stage,people are concerned about the negative impact that building construction has on the environment.Building construction enterprises must have preventive measures and deal with environmental pollution during construction.This is to minimize pollution caused by construction and to satisfy the implementation of green civilization construction.This is important as it can enhance the development of socialist spiritual civilization and thus promote the expansion of enterprises in the long run.The author explores and analyzes the main types of environmental pollution generated in building construction.Besides,the author provides effective measures for the prevention and control of environmental pollution caused by building construction to reduce its adverse impact on the environment.

Control Effect of Bio-guide Wasp Virus Missile on Ostrinia furnacalis and Its Benefits for Maize Production in Nanchong City

In order to promote ＂green plant protection＂, reduce the administration dosage and residue of pesticides and control cost of environment pollution, and improve maize production, quality and agricultural ecological environment safety. In this study, the control effect and benefit of bio-guide wasp virus missile（BGWVM） on Ostrinia furnacalis in Nanchong City was investigated by using insect light traps and combined method of field investigation and experimental demonstration. According to the results, applying 30-37 pairs of BGWVM per hectare exhibited an average control efficiency of 78.0%, and the control cost was 139.50-172.50 CNY/hm2, which was reduced by 142.50-168.00 CNY/hm^2 compared with conventional chemical control. Average maize yield in BGWVM demonstration plot was 817.8 kg/hm2 higher and improved by 11.0% compared with blank control plot. The output value was improved by 1 799.16 CNY/hm^2 and the revenue increased by 1 941.66-1 967.16CNY/hm2. During 2003-2014, the cumulative demonstration and popularization area of BGWVM technique in Nanchong City had reached 24 507.33 hm^2, and the cumulative yield increment reached 20.042 1 million kg. BGWVM application improved total output value by 44.092 6 million CNY and saved control cost by 3.492 3-4.117 2 million CNY, thus increasing the revenue by 47.584 9-48.209 8 million CNY. BGWVM application reduced 551.41 t of 5% dimehypo GG or 12.87 t of 90%monosultap WP. In addition, BGWVM technique is simple to use, labor-saving and safe for human, animals, environment and crops, with significant economic, ecological and social benefits and without any side effect, which has become an ideal substitute for controlling O. furnacalis and reducing chemical pesticides in organic agriculture industry, modern agriculture industry, production of green and pollution-free agricultural products and IBM prevention and control demonstration gardens.

The Increasing Role of Synergistic Effects in Carbon Mitigation and Air Quality Improvement, and Its Associated Health Benefits in China

A synergistic pathway is regarded as a critical measure for tackling the intertwined challenges of climate change and air pollution in China. However, there is as yet no indicator that can comprehensively reflect such synergistic effects;hence, existing studies lack a consistent framework for comparison. Here, we introduce a new synergistic indicator defined as the pollutant generation per gross domestic product (GDP) and adopt an integrated analysis framework by linking the logarithmic mean Divisia index (LMDI) method, response surface model (RSM), and global exposure mortality model (GEMM) to evaluate the synergistic effects of carbon mitigation on both air pollutant reduction and public health in China. The results show that synergistic effects played an increasingly important role in the emissions mitigation of SO_(2), NOx, and primary particulate matter with an aerodynamic diameter no greater than 2.5 μm (PM2.5), and the synergistic mitigation of pollutants respectively increase from 3.1, 1.4, and 0.3 Mt during the 11th Five-Year Plan (FYP) (2006–2010) to 5.6, 3.7, and 1.9 Mt during the 12th FYP (2011–2015). Against the non-control scenario, synergistic effects alone contributed to a 15% reduction in annual mean PM2.5 concentration, resulting in the prevention of 0.29 million (95% confidential interval: 0.28–0.30) PM2.5-attributable excess deaths in 2015. Synergistic benefits to air quality improvement and public health were remarkable in the developed and population-dense eastern provinces and municipalities. With the processes of urbanization and carbon neutrality in the future, synergistic effects are expected to continue to increase. Realizing climate targets in advance in developed regions would concurrently bring strong synergistic effects to air quality and public health.

Study on Effectiveness of Government Governance in the Cities with Serious Air Pollution: A Case Study of Zhengzhou City

It is a basic national policy of China and the most important problem in the current development process to control pollution and protect environment.Since environmental and ecological management has strong externality,there is little room for the private sector to play,and government governance becomes the most important means.To rationally assess government effectiveness in ecological management and clarify the main factors affecting the effective governance,Zhengzhou City is taken as research object.By referring to advanced experience of policy evaluation at home and abroad,two level-one indexes(ecological effect and economic effect)and eight level-two indexes(days of good air,concentrations of main air pollutants,energy consumption of per unit GDP,total energy consumption,per capita GDP,energy consumption of heavy industry,added value of industries above designated size,and annual fixed asset investment)are constructed to evaluate effectiveness of air pollution control policy in Zhengzhou City.Moreover,the factors affecting effectiveness of air pollution control policy in Zhengzhou City are analyzed.Finally,corresponding suggestions are proposed based on these factors:perfecting laws and regulations of air pollution control in Zhengzhou City,establishing accountability mechanism and cross regional governance system,adjusting industry and energy structure,valuing environmental technology and social participation,and improving government and people's awareness of environmental protection.

Thoughts on Energy Solutions to Alleviation of Air Pollution during the Heating Period in Key Areas

Since the implementation of the Action Plan for Air Pollution Prevention and Control , all regions of China have steadily promoted the prevention and control of air pollution and achieved results continuously. However, the atmospheric environment in key areas such as Beijing-Tianjin-Hebei region, the Yangtze River Delta region, and Fenwei Plain is still severe, and especially during the heating period heavy pollution occurs frequently, which has become the focus and difficulty of improving the quality of the atmospheric environment and is also the weakest link of China s air pollution control at present. How to alleviate air pollution, how to win the battle of pollution prevention and control, how to hold the fruits of the blue sky defense war, energy consumption is key.

Research Progress on the Relationship between Air Pollution and Socio-economic Growth in China

Air pollution is a hot issue studied by scholars all over the world.Academic circles generally believe that socio-economic factors such as extensive economic growth,unbalanced proportion of industrial structure and unreasonable energy consumption structure are the main"culprits"of serious air pollution in China.Therefore,the relationship between air pollution and socio-economic growth has very important theoretical and practical significance for air pollution prevention and control and promoting the sustainable and healthy development of cities.Through literature research and summary methods,this paper studies the severity and harmfulness of air pollution in China,and deeply studies the research progress of socio-economic influencing factors of air pollution,environmental Kuznets curve hypothesis of air pollution,decoupling relationship between air pollution and socio-economic growth,so as to provide useful reference for the prevention and control of air pollution.

Impact of China’s Air Pollution Prevention and Control Action Plan on PM2.5 chemical composition over eastern China

China promulgated the Air Pollution Prevention and Control Action Plan(the Action Plan)in 2013 and developed stringent control measures to mitigate fine particulate matter(PM2.5) pollution.Here,we investigated the PM2.5 chemical composition changes over eastern China associated with the Action Plan during 2013-2017 using satellite-based PM2.5 chemical composition data derived using CMAQ simulations and satellite inputs.The PM2.5 concentrations decreased considerably during this time as a result of the reductions in all chemical species in PM2.5.The population-weighted mean concentrations over eastern China decreased from 11.1 to 6.7μgm-3 for SO42-,13.8-13.1μgm-3 for NO3-,7.4-5.8μgm-3 for NH4+,9.9-8.4μgm-3 for OM,4.6-3.8μg m-3 for BC and 12.9-9.6μg m-3 for other species in PM2.5.SO42-had the largest reduction of 40%,while NO3-had the lowest reduction of 5%,resulting in a greater fraction of NO3-and a smaller fraction of SO42-in PM2.5.Among the three key regions,Beijing-Tianjin-Hebei had the largest reduction in PM2.5 and its chemical compositions.The decrease in SO42-concentrations was in line with the reduction of SO2 emissions,and the major driver of the SO2 emission reductions was the industrial sector.The decrease in NO3 concentrations was limited because the decrease in SO2 emissions and the stable NH3 emissions facilitated the formation of NO3-from HNO3,which partially offset the reduction in NOx emissions driven by the power sector.To mitigate PM2.5 pollution more effectively,future efforts are needed to reduce NH3 emissions.

Evaluation of the effect of air pollution control during the Beijing 2008 Olympic Games using Lidar data

To examine the effect of pollution control measures on Beijing air quality during the 2008 Olympic Games, this paper analyzes the variation of aerosol extinction coefficient observed with a Dual-wavelength Polarized Lidar in Beijing during the Olympic Games. The results show that (1) during the Beijing Olympic Games, the aerosol extinction coefficient decreased to about 42.3% in the surface layer (below 250 m) compared with that in 2007 under almost the same meteorological conditions, indicating the effectiveness of local air pollution control measures in Beijing areas; (2) the analysis of the aerosol extinction coefficient obtained before (Jul. 20–Aug. 7, 2008) and during the Beijing Olympic Games (Aug. 8–Aug. 24, 2008) shows a maximum decrease of daily aerosol extinction coefficient in layer of 0.5-1.5 km. To elucidate such a phenomenon, the transport of PM10 from surrounding areas to Beijing was simulated by NAQPMS (the Nested Air Quality Prediction Modeling System) during Jul. 20 to Aug. 24, 2008. Analysis of PM10 transport from neighboring areas indicated a decrease of 36.6% during the Olympic Games. This demonstrated the efficiency of pollution control measures in surrounding areas in improving air quality in Beijing.

A Study of China’s Air Pollution Prevention and Control Policy Framework from a Policy Instrument Perspective

Environmental pollution caused by rapid economic development like that seen in China over the past twenty years poses various threats to human health. People have started to place much more of an emphasis on environmental security, working to find a balance between sustainability and economic growth. In recent years, air pollution has emerged as a highly discussed topic of social and environmental relevance in China, due in part to persistent smog that affects everyday life and causes serious harm to human health. Although air pollution is normally associated with human activity, is can be caused by natural processes such as eruptions and forest fires, but is always characterized by the release of certain substances into the atmosphere which, when present in certain concentrations or for given durations, can harm human health, daily life, productivity, and other aspects. In humans, it mainly affects the respiratory system, notably the lungs, as well as the immune system. A series of studies both in China and overseas have shown, in certain cases, even low concentrations of air pollution can pose a great threat to human health. In this study, we conducted an analysis of air quality policies, focusing on the 2018 revision of the People’s Republic of China’s Law on the Prevention and Control of Air Pollution(LPCAP). We utilized the content analysis method and Strauss and Corbin’s grounded theory to construct a policy framework, demarcate analysis units, code and classify policy texts, determine descriptive statistics, and analyze dimensional interactions. We used two dimensions(basic policy instruments classified as demand-, supply-, and environment-side;and air carrying capacity) to quantify and analyze the LPCAP, which enabled us to analyze the deficiencies and conflicts within policy instruments. The results show a higher utilization frequency of environment-side policy instruments, particularly regulation management and strategic measures. This reflects efforts by the government to create a favorable environment for improving air quality. Additionally, supply-side policy instruments are used far less frequently than environment-side policy instruments. Air quality legal policies and pollution control measures mainly consist of environment-side policy instruments;ecological thinking and air quality policies that are based mainly on supply-side and environment-side policy instruments;and social coordination policies that mainly use environment-side policy instruments. Based on the results of this study, we recommend an increase in the number of supply-and demand-side policy instruments, particularly the latter which includes promoting ecological thinking amongst citizens, to optimize and improve air pollution prevention and control policies.

Particulate matter trends and quantification of the spring sand-dust contribution in Hohhot,Inner Mongolia,from 2013 to 2017

On 10 September 2013,the State Council promulgated the Action Plan for the Prevention and Control of Air Pollution(hereinafter referred to as the Action Plan).To study the variations in the air pollutant concentrations in Hohhot during the implementation of the Action Plan and the effects of various measures,the daily concentrations of air pollutants(fine particulate matter(PM_(2.5)),inhalable PM(PM 10),SO_(2),and NO_(2))in Hohhot published by the China Environmental Monitoring Station were obtained to analyze the general meteorological conditions in Inner Mongolia from 2013 to 2017.The variations and causes of the ambient PM concentration in Hohhot were examined,and the quantitative influence of sandstorms on the ambient PM concentration in Hohhot was analyzed by selecting the spring season with frequent sandstorms as an example.The results showed the following.(1)The air quality in Hohhot continuously improved,and compared with those in 2013,the PM_(2.5)and PM 10 concentrations decreased by 24.6%and 48.2%,respectively,in 2017.However,the air pollutant concentrations remained high,with the average PM_(2.5)and PM 10 concentrations exceeding the national secondary standards by 22.9%and 35.7%,respectively.(2)The reductions in the spring PM_(2.5)and PM 10 concentrations were 5.6%and 8.9%,respectively,and the annual decreases in the PM_(2.5)and PM 10 concentrations were 3.6 and 15.1μg m^(−3)yr−1,respectively,from 2013 to 2017.(3)The absolute contribution ranges of dust weather to the concentrations of PM_(2.5),PM 10,and TSP during 2013–17 were 0.6–5.2μg m^(−3),9.0–16.9μg m^(−3),and 14.7–30.0μg m^(−3),respectively,in Hohhot during the spring.

An assessment of China's joint prevention and control policy on sulfur dioxide emissions reduction:A spatial econometric analysis

Sulfur dioxide(SO_(2))is a typical pollutant that affects human health,climate,and environmental and ecological conditions.China has been experiencing high concentrations of SO_(2),particularly in urban areas,since the 1990s.In 2010,a"joint prevention and control"(JPC)policy was issued to address air pollution problems and strengthen the regulation of SO_(2)emissions.This study aimed to describe the mitigation effects of this policy on SO_(2)emissions in 116 Chinese cities from 2003 to 2017.We applied global and local Moran's I indices to confirm the presence of significant spatial autocorrelation in SO_(2)emissions and constructed four spatial models to assess the effect of the JPC policy in reducing SO_(2)emissions and its transmission mechanism.We found that the policy decreased SO_(2)emissions by 1.89×10^(4)tons,S0_(2)intensity by 1.70 tons per km^(2),and S0_(2)per capita of 158.49 tons per 10,000 people in each city,on average,all of which are significant changes.The empirical results also show that population growth,economic structure,and environmental protection significantly decrease SO_(2)emissions.Finally,we recommended policies to encourage regional cooperation under the JPC policy,with the aim of promoting furtherreductions in SO_(2)emissions.

中国大气污染防治政策与空气污染治理——基于城市级面板数据的实证研究

2013年颁布实施的《大气污染防治行动计划》是我国首个针对环境突出问题开展综合治理的行动计划;为巩固治理效果,应对动态变化的环境问题,2018年国务院进一步发布了《打赢蓝天保卫战三年行动计划》。研究利用中国258个城市2013年1月至2020年9月日度空气污染数据,实证检验了上述两阶段政策对空气质量的影响,并从不同污染物治理效果、时间和区域异质性等角度分析了政策效应的差异。结果指出:第一,“大气十条”和“蓝天保卫战”均显著降低了AQI、PM_(2.5)、PM_(10)、SO_(2)、NO_(2)、CO;第二,相比“大气十条”,“蓝天保卫战”对NO_(2)的减排效应更高,且实现对O_(3)的协同治理;第三,“大气十条”和“蓝天保卫战”对各污染物的减排效应因供暖时期、地区能源资源禀赋呈现出较强的异质性特征。

基于用电数据的潍坊市工业污染源冬奥会管控效果评估

利用潍坊市安装用电监控的工业企业在冬奥会前和会中的生产用电数据及部分企业大气污染物排放在线监测数据,分析企业生产用电量和排放量的变化特征及潜在的相关性,评估管控措施落实状况及减排效果。结果表明:管控期间,潍坊市工业企业用电量相比管控前平均下降57.96%;完全停产类企业用电量下降75%以上,大气污染物(SO_(2)、NO_(x)、烟粉尘)排放量下降100%;限产类企业用电量降幅呈现随管控措施加严而增大的趋势;延迟复产类企业延迟复产率为47.83%~96.00%,用电量下降50.76%。根据管控期间各行业企业的用电量变化状况,判定各企业基本落实了减排要求。可见,企业用电数据在一定情况下,可以替代或辅助工业企业排放数据,反映企业管控措施落实状况及减排效果。

水资源污染综合治理措施及其防治效果评估研究

长期的水污染会破坏水环境,造成生态系统的破坏和失衡,影响人类的生产和生活。为此,研究水资源污染综合治理措施并评估防治效果。在分析了水资源污染物的4种主要类型后,从工业生产、市政管理以及工程保障3方面提出相应的治理措施,并使用模糊综合评价法对治理后的效果评价,将评价结果分为5个等级,利用加权平均原则对评价结果定量计算。将所提治理措施应用在某市生态公园调节塘内,经一段时间后检验该塘水质有了明显改善,防治效果评估结果为优秀,证明所提方法在水资源污染治理方面具有可行性。

“大气污染物和温室气体协同控制”政策的实施效果研究

推动减污降碳协同增效是深入打好污染防治攻坚战,实现碳达峰的必然要求。将《大气污染防治行动计划》和《打赢蓝天保卫战三年行动计划》视为一个连贯政策,运用渐进双重差分法探究了于2015和2018年提出的“大气污染物和温室气体协同控制”政策实施效果。研究表明:“大气污染物和温室气体协同控制”政策显著提高了“SO_(2)-CO_(2)”排放强度协同度和“PM-CO_(2)”排放量(强度)协同度,但该政策对“SO_(2)-CO_(2)”排放量协同度无显著影响。机制分析表明,提升政府监管水平、弱化政企关系以及增强企业绿色创新是政策的主要传导机制。异质性分析表明,政策效果在不同能耗水平的城市中具有显著差异,比起高污染上市公司,高耗能中小企业在污染物和CO_(2)的协同减排措施上仍存在较大改善空间。研究结论对我国优化“持续深入打好蓝天保卫战”相关政策提供启示。

计算机视觉血液透析感染防控行为监测系统在血液透析中心的临床应用及效果评价

目的探讨计算机视觉血液透析感染防控监测系统在血液透析操作感染防控关键行为规范识别与人工观察的一致性及临床应用效果。方法抽取2022年9月─12月血液透析中心护士血液透析上下机操作198人次为研究对象。将系统实时记录规范动作定为计算机组,人工回顾系统视频规范动作定为人工组;系统使用前后同一护士血液透析上下机操作感控关键行为分为干预前和干预后;验证计算机组和人工组血液透析上下机操作一级指标,二级指标规范识别的一致性,比较系统使用前后同一护士血液透析上下机操作感控关键行为的规范率。结果共观察血液透析上下机操作198人次,2组一级指标:血液透析内瘘/导管上下机操作规范识别一致性较强[内瘘上机kappa值=0.718;内瘘下机kappa值=0.714;导管上机kappa值=0.788;导管下机kappa值=0.712]。二级指标:断开导管一致性较差(kappa值=0.173);戴手套一致性一般(kappa值=0.243);导管连接一致性一般(kappa值=0.305);内瘘/导管消毒一致性中等(kappa值=0.556);手卫生执行一致性中等(kappa值=0.590)。干预后护士血液透析上机规范消毒、待干时间、手卫生、通路评估规范率优于对照组(χ^(2)=8.156,P=0.004;χ^(2)=30.462,P<0.001;χ^(2)=21.023,P<0.001;χ^(2)=23.522,P<0.001);戴手套及连接导管规范率(χ^(2)=1.823,P=0.177;χ^(2)=0.410,P=0.520)比较无统计学差异;干预后护士血液透析下机操作中的规范消毒、手卫生执行规范率优于对照组(χ^(2)=4.444,P=0.035;χ^(2)=17.770,P<0.001);干预前后戴手套、断开导管、待干时间规范率比较无统计学差异(χ^(2)=1.309,P=0.253;χ^(2)=3.220,P=0.073;χ^(2)=2.254,P=0.133)。结论计算机视觉血液透析感染防控行为监测系统记录护士在血液透析上下机操作规范识别与人工观察较为一致,通过该系统能提升护士在血液透析上下机操作感染控制关键行为的规范率,防止血液透析相关感染事件的发生。

Rapid improvement of PM2.5 pollution and associated health benefits in China during 2013–2017

Exposure to fine particulate matter(PM2.5)is known to harm public health.In China,after implementation of aggressive emissions control measures under the Action Plan of Air Pollution Prevention and Control(2013-2017),air quality has significantly improved.In this work,we investigated changes in PM2.5 exposure and the associated health impacts in China for the period 2013-2017.We used an optimal estimator of PM2.5 combining in-situ observations,satellite measurements,and simulations from a chemical transport model to derive the spatial and temporal variations in PM2.5 exposure,and then used welldeveloped exposure-response functions to estimate the premature deaths attributable to PM2.5 exposure.We found that national population-weighed annual mean PM2.5 concentrations decreased from 67.4μgm-3 in 2013 to 45.5μgm-3 in 2017(32%reduction).This rapid decrease in PM2.5 pollution led to a 14%reduction in premature deaths due to long-term exposure.We estimated that,during 2013-2017,the premature deaths attributable to long-term PM2.5 exposure decreased from 1.2 million(95%CI:1.0,1.3;fraction of total mortality:13%)in 2013 to 1.0 million(95%CI:0.9,1.2;10%)in 2017.Despite the rapid decrease in annual mean PM2.5 concentrations,health benefits associated with reduced long-term exposure were limited,because for many cities,the PM2.5 levels remain at the portion where the exposure-response function is less steeper than that at the lowconcentration end.We also found that the deaths associated with acute exposure decreased by 61%during 2013-2017 due to rapid reduction in the number of heavily polluted days.Our results confirm that clean air policies in China have mitigated the air pollution crisis;however,continuous emissions reduction efforts are required to protect citizens from air pollution.

减污降碳协同效应综合评估的研究综述与展望

温室气体与大气污染物减排是环境和气候治理的重要任务,推进减污降碳协同增效是促进经济社会发展全面绿色转型的重要抓手,可以助力美丽中国建设和“双碳”目标实现。该研究系统梳理了减污降碳协同效应的概念、类别及量化评估方法,详细比较了自顶向下、自底向上、混合协同效应综合评估模型的特点和适用情况,分析总结了协同效应在各国单一目标和协同控制政策中的应用,以期为中国减污降碳协同增效政策发挥协同治理效果提供经验指导。从技术视角结合污染物与温室气体的直接和间接联系,剖析了协同效应产生的根源;从行业视角探索电力、工业、交通等重点行业助力减污降碳目标的发力点;从管理科学的视角总结了协同效应综合评估中四个关键科学问题,并提出后续的突破方向。综合评估流程的规范化和各评估环节中的多学科交叉体现了综合评估的复杂性,需要剖析温室气体与污染物的产生和传播过程及二者之间的直接和间接联系、温室气体与污染物的健康影响机理等;综合评估中时间、空间和评估对象选择的多样性导致结果的不确定性,需要依托逐渐成熟的大数据收集存储技术,加强协同控制对排放水平、健康水平、减排成本、农业和生态系统影响的定量刻画。增强协同效应评估的可比性有利于不同结果的相互佐证和对比分析,需要合理计算协同控制在不同维度的综合收益;国家、区域、城市层面评估的侧重点差异较大,需要明晰减污降碳治理体系并加强评估的层次性,以促进各级管理部门更科学地开展减污降碳协同增效的政策实践。

城市园林景观对河道水污染的防治效果研究

针对城市水污染日益严重的问题,提出城市园林景观对河道水污染的防治效果研究。采集滨河公园河道各采样点水体样本,以理化指标、重金属和类金属含量及对应WQI和TLI评估上、下游水质。分析后可知,园林景观对河道水污染防治作用明显,且部分指标间存在关联作用,进一步分析植被过滤带、台地式石笼护岸、河岸斜坡式缓冲带和生态浮岛中各种植类型的净化效果,实验分析得出各种植类型均具备防治效果,其中乔灌木群落栽植效果最佳,因地制宜地结合各种植类型能够有效防治河道水污染。