改进的模糊层次分析法在南苕溪临安段水质评价中的应用

南苕溪是太湖的源头水系,其水质状况对杭嘉湖平原居民饮用水安全和太湖流域的污染治理有重要意义.为了了解南苕溪的水质状况,在临安段开展了2年的水质监测,分别在2009年7月、10月和2010年1月、4月采集了水样并进行水质评价.同时,为了克服以往模糊层次分析法存在的低估污染的严重性及不能评价劣Ⅴ类水质的缺点,建立了一个改进...     

An abbreviated alternatives assessment process for product designers: a children’s furniture manufacturing case study

Alternatives assessment is becoming increasingly popular to evaluate the potential environmental and human health hazards of materials. A three step process was used to identify and evaluate alternative products for a children's furniture manufacturer. An alternatives assessment framework was developed to analyze alternative mattresses. The framework specifically addresses those environmental and safety attributes applicable to the product and the product components in accordance with the product’s intended use. The result of the assessment allowed the manufacturer to select the most environmentally friendly alternative and eliminate polyvinyl chloride from their product.     

淀山湖入湖水质净化的生态工程实践研究

作为上海境内最大的天然淡水湖泊以及黄浦江上游重要的水源保护地,淀山湖的水质状况对上海市饮用水水源安全起着举足轻重的作用。文章运用生物治理与工程措施相结合的手段,在淀山湖大朱厍港实施了净化人湖水质的生态工程试验。研究表明工程示范区域存在风浪大、水位较深、水流较急等特点,是水生植被尤其是沉水植物恢复的重要限制因素。通过选择...     

天堂河河道治理工程水质改善预测分析

河道治理工程重在改善河道的水质，以恢复河流生态系统。本文以北京市大兴区天堂河河道治理工程为例，介绍了河道治理工程环境影响评价中的水质改善预测分析，首先分析生态需水量和供氧量是否满足河流生态需水要求，后又利用地面水环评助手软件预测了河流水质，预测分析了天堂河水质目标的可达性，旨在为以后的河道治理类工程环境影响评价提供参考。     

火电厂电除尘器电控系统的节能改造

电除尘器是火力发电厂的高能耗设备,从细节入手,挖掘电除尘器节能潜力,利用原有设备进行改造,采用简易脉冲供电方式和临界反电晕供电方式可以提高电除尘器电能的利用率,大幅度地降低电除尘器的能耗,实现节能。通过对电除尘器电控系统改造实例的前后电场参数进行比较,说明这种改造方法是可行的,实现了经济、节能与环保三者的兼顾与统一。     

土地政策参与宏观调控手段的完善

土地政策参与宏观调控是在特定经济背景下提出的.随着时间的推移和经济环境的变化,土地政策在h参与宏观调控的过程中也应做出相应的调整.列举了新经济背景下土地调控手段存在主次错位、刚性不强、缺乏有效配合等一系列问题,针对这些问题提出了在土地政策参与宏观调控的过程中要增加地土经济手段的运用、推动土地政策法律化和增强部门间协调配合等相关对策与建议.     

TENMILE CREEK: A STUDY OF STREAM RELOCATION1

ABSTRACT: After input from various interested agencies, three miles of creek were relocated to facilitate the construction of Interstate 70 through Tenmile Canyon west of Denver. The 0.5.million dollar project was designed to provide fish habitat of equal value to that present before construction or, if possible, to improve this habitat. Construction techniques were designed to minimize damage to flora and fauna. After the channels were excavated, rock and log fish habitat structures were constructed. Two years after construction, a 4 percent chance flood occurred at the project area which made almost 75 percent of the habitat structures ineffective. Pool-riffle ratios and quantity and quality of spawning areas remained essentially unchanged throughout the period. Population estimates indicated an increase in the number of fish in the postconstruction period compared to preconstruction numbers. Fish biomass estimates for the project area were comparable for the two periods. Aquatic invertebrate populations were unchanged as indicated by comparison of three pre- and postconstruction indices.     

WATER YIELD AUGMENTATION THROUGH FOREST AND RANGE MANAGEMENT - ISSUES FOR THE FUTURE1

The demand for more water is increasing throughout the country. Research on upland watersheds clearly demonstrates that water yield can be increased using forest and range management practices. Based on the experience of the past several decades and a review of six papers in a recent AWRA series on water yield augmentation through vegetation management, the following issues and concerns are discussed: predicting increased yields from large basins; economic evaluation of additional flows; court acceptance and need for system models; the legal question of ownership and transferability of increased yields; and management emphasis on private and federal lands. The immediate potential for water yield augmentation is on carefully selected watersheds that have the bio-physical potential to produce high value water under environmentally acceptable multiple use management. We predict water yield management on a broader scale will result from increased pressures to solve the legal and economic issues involved.     

我国环保产业技术现状与发展方向

本文对我国环保产业技术现状进行了全面分析，并指出我国环保产业技术与国外的差距和不足，同时针对环保产业技术落后的各种因素和实际需要，提出了我国环保产业技术的发展方向。     

水化前兆观测的探讨和反思

从水文地球化学的角度说明利用水化组分预报地震是可行的 ,并以历次地震的震例说明水化组分具有映震能力 ,进而对映震组分的不灵敏原因作了探讨。并就今后如何利用水化观测手段进行地震预报的分析研究提出几点建议。