拉萨垃圾填埋场地下水环境质量影响分析研究

通过在拉萨市垃圾填埋场周边布设4个监测井,于2017—2018年采样分析24项地下水水质指标,并运用单因子指数、综合评价法、污染指数P_(ki)法、等标污染负荷比法等对地下水污染状况进行评价。结果表明:地下水水质在良好—优良范围内;单项污染指数1的有pH值、铅,相比背景井地下水水质有所下降;填埋场周边地下水污染程度呈轻污染,主要受到影响的指标为pH值、高锰酸盐指数、阴离子表面活性剂、铅、氟化物。     

美国Surfer 8.0软件在地下水环境质量评价中的应用

通过Surfer 8.0软件在某地地下水环境评价中的应用实例,重点阐述了其在浅层地下水污染物浓度空间分布图绘制、地下水质量分区图绘制、地下水污染分区图绘制、区域地下水污染趋势分析、地下水污染原因分析等方面的应用。     

利用污染指数变化率对嘉峪关市地下水环境质量进行综合 …

通过５年的水质监测数据计算了嘉峪关市地下水环境污染指数及变化率，评价了嘉峪关市地下水环境质量及其动态变化趋势。     

岩溶地区地下水环境监测难点及解决思路

基于岩溶地区地下水分布特征,结合岩溶地区地下水监测现状,分析了岩溶地区地下水环境质量监测工作中所面临的问题和困难。提出了关于岩溶地区地下水监测的思考和建议,为岩溶地区地下水环境监测提供技术指导。     

昌吉州煤矿废水排放量及水质特征分析

为掌握昌吉州煤矿废水排放及水质特征现状,通过实地调查监测,分析了昌吉州煤矿分布及矿井废水的排放量和水质特征.结果显示,昌吉州5县2市共有井下开采煤矿74家,以9万t以上煤矿为主;2007年排放矿井废水264.608万t,排放量小于5万t的煤矿占大多数;煤矿废水具有呈弱碱性、低毒、盐分含量高的特点,主要超标污染物为总悬浮物和化学需氧量;全州约三分之二的矿井废水总悬浮物超标.     

Scatterscore: A Reconnaissance Method To Evaluate Changes In Water Quality

Water quality data collected in periodic monitoring programs are often difficult to evaluate, especially if the number of parameters is large, the sampling schedule varies, and values are of different orders of magnitude. The Scatterscore Water Quality Evaluation was developed to yield a quantitative score, based on all measured variables in periodic water quality reports, indicating positive, negative or random change. This new methodology calculates a reconnaissance score based on the differences between up-gradient (control) versus down-gradient (treatment) water quality data sets. All parameters measured over a period of time at two or more sampling points are compared. The relationship between the ranges of measured values and the ratio of the medians for each parameter produces a data point that falls into one of four sections on a scattergram. The number and average values of positive, negative and random change points is used to calculate a Scatterscore that indicates the magnitude and direction of overall change in water quality. The Scatterscore Water Quality Evaluation, a reconnaissance method to track general changes, has been applied to 20 sites at which coal utilization by-products (CUB) were used to control acid mine drainage (AMD).     

废弃矿坑水体主离子化学特征及其灌溉适宜性分析

分析了上海市某废弃矿坑水样的主离子组成特征及其控制因素,并在钠吸附比法（SAR）、钠含量法（Na%）、残余碳酸钠法（RSC）和灌溉系数法（Ka）评价结果的基础上,利用极限条件法确定水体的灌溉适宜性。结果表明：研究区水样阳离子以Ca2+或Na+为主,阴离子以HCO-3为主;山南侧矿坑水体的溶解性总固体（TDS）含量偏高,主要受蒸发浓缩控制,而山北侧矿坑水体主要受水岩作用控制。山南侧矿坑水样的Na%和RSC不符合适宜灌溉的限值要求,评价结果为不宜直接灌溉,而山北侧矿坑水样的所有评价指标均符合适宜灌溉的限值要求,评价结果为非常适宜。     

水环境质量预报预警大数据平台研究

构建基于水环境模型的水质预报预警大数据平台是一项复杂的系统工程,主要面临模型的规模计算及其引发的模拟结果规模存储、规模分析的挑战.相关挑战极大地限制了水环境质量预报预警业务的深入开展,但目前国内外关于此方面的研究极少.为此,提出了水环境质量预报预警大数据平台框架.该框架以水环境模型体系为基础,以大数据集群计算体系为核心...     

A Methodology for Space-Time Classification of Groundwater Quality

Safeguarding groundwater from civil, agricultural and industrial contamination is matter of great interest in water resource management. During recent years, much legislation has been produced stating the importance of groundwater as a source for drinking water supplies, underlining its vulnerability and defining the required quality standards. Thus, schematic tools, able to characterise the quality and quantity of groundwater systems, are of very great interest in any territorial planning and/or water resource management activity.This paper proposes a groundwater quality classification method which has been applied to a real aquifer, starting from several studies published by the Italian National Hydrogeologic Catastrophe Defence Group (GNDCI).The methodology is based on the concentration values of several parameters used as indexes of the natural hydro-chemical water condition and of potential man-induced modifications of groundwater quality. The resulting maps, although representative of the quality, do not include any information on its evolution in time. In this paper, this “stationary” classification method has been improved by crossing the quality classes with three indexes of temporal behaviour during recent years. It was then applied to data from monitoring campaigns, performed in spring and autumn, from 1990 to 1996, in the plain of Modena aquifer (central Italy). The results are reported in the form of space-time classification table and maps.     

Quality of Shallow Groundwater and Drainage Water in Irrigated Agricultural Lands in A Mediterranean Coastal Region of Turkey

Spatial and seasonal differences in water quality of drainage water and unconfined shallow groundwater were related to irrigation in Samandağ, a Mediterranean coastal region. Eighteen wells, seven drainage points and Orontes River were monitored bimonthly for one year for analyses of electrical conductivity (EC), total dissolved solids (TDS), sodium adsorption ratio (SAR), cations (Na, K, Ca + Mg) and anions (CO₃, HCO₃, Cl and SO₄). Agricultural irrigation using saline groundwater decreased water quality of Orontes River during the irrigation season (May to September) more than during the non-irrigation season (October to April). Seasonal fluctuations in water quality of shallow groundwater were greater during the irrigation season than the non-irrigation season in the study area. Excessive use of groundwater resulted in a decline in the water table levels in the irrigation season. Water table level rose up to the soil surface in areas where there was a lack of drainage or poor drainage, due to the impact of precipitation in the winter. SAR and pH values of drainage water increased in the irrigation season, while the other properties of drainage water decreased. Irrigation water quality of Orontes River was classified as C₃S₁ in both seasons. Irrigation water quality of shallow groundwater and drainage water varied from C₂S₁ to C₄S₂ in one year. Drainage and well waters were found to be different on yearly basis in terms of Na, SAR (p<0.01) and Ca + Mg concentrations (p<0.001). Ca + Mg concentrations for both sources were different for all sampling dates (p<0.001).     

塔里木河中游水质污染原因浅析

通过对2002、2003年塔里木河中游水质现状的分析及上下游水环境质量对比和污染因子对比,得出塔里木河中游水质污染的主要污染因子及形成污染的原因。为塔里木河流域综合治理、水资源合理利用和生态保护提供依据。     

Fluoride Concentration in Drinking Water of Karachi City (Pakistan)

The ground and municipal water supply samples of Karachi city were analyzed for their fluoride contents. The fluoride contents in water samples collected from the subsurface and river sources were found below the WHO recommended value for the general health of the people. However, in some industrial areas the groundwater sample showed higher level of fluoride concentration. Continuous monitoring of water resources and cautious fluoridation is suggested to maintain proper status of fluoride concentration in the drinking water.