石羊河流域1959年至2008年风速变化特征分析

利用线性拟合、Mann—Kendall方法、小波分析对石羊河流域五个测站空间平均的近50年来的逐日风速资料进行了倾向、周期、突变等特性分析。研究结果表明：1959年至2008年间,整个石羊河流域风速呈减小趋势,变化率约为-0．004m／（s．a）．而上游风速呈现明显的上升趋势。四个季节中冬季风速降低速度最大,而夏季风速呈现上升趋势。风速的长期变化还具有一定的突变性,年平均风速在1988年出现了由高到低的突变,表明风速开始下降。复值Morlet小波分析的结果显示,风速变化存在6a、13a、19a、25a四个峰值。其中19a的时间尺度为第一主周期。     

煤炭开发建设项目环境影响后评价初步研究

环境影响后评价作为环境影响评价的延伸,是提高环评有效性的有力手段,目前我国环境影响后评价仍处于起步阶段,其理论和实践都具有很强的探索性。煤炭在我国的能源地位突出,但对煤炭开采建设项目的环境影响后评价研究甚少,文章介绍了国内外环境影响后评价的研究进展,并针对煤炭项目,通过识别煤炭开采的环境影响,概述了其评价指标的选取原则、指标体系的构建和评价方法。     

主成分分析法在水环境质量评价中的应用进展

对研究水质的一种多元统计方法——主成分分析法做了详细介绍,并对主成分分析法在河流、地下水、矿区、湖泊水质评价中的应用进行了综述,简要分析了主成分分析法在水环境质量评价中尚有不足之处。     

基于多期遥感数据对岱海湿地的景观格局分析

文章提取了3期遥感数据的湿地类型,通过对景观格局的动态变化分析,说明了人为干扰和气候因素对岱海湿地的影响,为湿地管理提供了依据。     

亚甲蓝分光光度法测定水体阴离子表面活性剂方法的探讨

LAS是地表水和地下水水质的必测项目,国标（GB7494—87）方法操作复杂,要重复萃取四次后再洗涤,有机溶剂消耗量大,而且相当的耗时,本文通过同步实验对比与分析,得出：一次性加入20mL氯仿萃取加洗涤的方法其测定结果较好,而且极大地减轻了氯仿对分析人员身体的损害程度。测定结果有较好的精密度和准确度。本方法具有可观的经济性、安全性和可操作性。     

梨树县农业生态环境的分析与建议

生态保护的重点是保护自然资源及由其组成的各类生态系统,预防环境污染和生态破坏,改善和恢复生态系统的环境功能,维护生态平衡。我县工业发展迅速,生态环境面临的压力不断加大,为改善其生态环境现状及存在问题,提出对策与建议,以实现全县经济社会的可持续发展。     

土地利用总体规划环境影响评价技术方法的研究

从国内外土地利用总体规划环境影响评价的技术方法研究出发,总结了各技术方法的优势和缺点。最后提出了完善土地利用总体规划环境影响技术方法的建议。     

基于快速聚类方法分析常州市区PM2.5的统计特性

运用统计方法研究常州市区2013~2014年6个国控点六项基本污染物(SO_2、NO_2、CO、O_3、PM_(2.5)和PM_(10))月平均浓度变化,结果表明,除O_3外,其它五项污染物月平均浓度夏季较低冬季较高.颗粒物与风速之间的关系为PM_(2.5)浓度随风速的升高一直降低,PM_(10)随风速的升高浓度先降低后升高.采用快速聚类分析(k-means)并运用SWV和DIV指数对六项基本污染物进行分类,得到4个样本分类.与依据颗粒物化学成分或粒径谱对PM进行源解析方法不同,本研究更多是从PM_(2.5)与其它污染物相关关系以及污染程度等角度按照欧式距离进行分类.不同类中PM_(2.5)来源明显不同,类1中PM_(2.5)与化石燃料燃烧排放密切相关,类2与O_3密切相关,类3与城市不完全燃烧排放、区域灰霾污染密切相关,类4可以归类于城市"背景"类.快速聚类分析结果也表明常州市区PM_(2.5)有着复杂的来源.     

Two-step accelerated mineral carbonation and decomposition analysis for the reduction of CO2 emission in the eco-industrial parks

Carbon dioxide（CO2） emissions are a leading contributor to the negative effects of global warming. Globally, research has focused on effective means of reducing and mitigating CO2 emissions. In this study, we examined the efficacy of eco-industrial parks（EIPs） and accelerated mineral carbonation techniques in reducing CO2 emissions in South Korea.First, we used Logarithmic Mean Divisia Index（LMDI） analysis to determine the trends in carbon production and mitigation at the existing EIPs. We found that, although CO2 was generated as byproducts and wastes of production at these EIPs, improved energy intensity effects occurred at all EIPs, and we strongly believe that EIPs are a strong alternative to traditional industrial complexes for reducing net carbon emissions. We also examined the optimal conditions for using accelerated mineral carbonation to dispose of hazardous fly ash produced through the incineration of municipal solid wastes at these EIPs. We determined that this technique most efficiently sequestered CO2 when micro-bubbling, low flow rate inlet gas, and ammonia additives were employed.     

Fast increasing of surface ozone concentrations in Pearl River Delta characterized by a regional air quality monitoring network during 2006-2011

Based on the observation by a Regional Air Quality Monitoring Network including 16 monitoring stations, temporal and spatial variations of ozone(O3), NO2and total oxidant(Ox) were analyzed by both linear regression and cluster analysis. A fast increase of regional O3concentrations of 0.86 ppbV/yr was found for the annual averaged values from 2006 to 2011 in Guangdong, China. Such fast O3increase is accompanied by a correspondingly fast NOx reduction as indicated by a fast NO2 reduction rate of 0.61 ppbV/yr. Based on a cluster analysis, the monitoring stations were classified into two major categories – rural stations(non-urban) and suburban/urban stations. The O3concentrations at rural stations were relatively conserved while those at suburban/urban stations showed a fast increase rate of 2.0 ppbV/yr accompanied by a NO2 reduction rate of 1.2 ppbV/yr. Moreover, a rapid increase of the averaged O3 concentrations in springtime(13%/yr referred to 2006 level) was observed, which may result from the increase of solar duration, reduction of precipitation in Guangdong and transport from Eastern Central China. Application of smog production algorithm showed that the photochemical O3production is mainly volatile organic compounds(VOC)-controlled. However, the photochemical O3production is sensitive to both NOx and VOC for O3pollution episode. Accordingly, it is expected that a combined NOx and VOC reduction will be helpful for the reduction of the O3 pollution episodes in Pearl River Delta while stringent VOC emission control is in general required for the regional O3 pollution control.