小氮肥清洁生产实践

文章介绍了沅江市氮肥厂废水闭路循环、尾气回收、废渣综合利用等工程,并介绍了该厂的生产工艺、污染源分布及排污特点。     

Trade-offs in sulfur emission trading in Europe

How to implement emission trading is one question in the current negotiations on a new sulfur protocol in Europe. Whereas the current protocol stipulates a 30 percent uniform reduction, national emission ceilings included in the proposed new protocol imply differentiated reductions. In addition, emission and fuel standards are proposed. This paper examines the costs and environmental impacts of emission trading. Emission trading combined with regulations is a new element in the paper. Calculations using the RAINS (Regional Acidification INformation and Simulation) model suggest that overlaying emission trading on regulations not only reduces the cost savings but has beneficial impacts as well: ecosystem protection is not changed and significant decreases in environmental benefits for countries are largely avoided. Emission trading can also be used to decrease emissions and increase ecosystem protection. If combined with existing legislation, emission trading minimizes losses in expected environmental benefits for some countries, and most countries gain. However, the initial distribution of emission ceilings has to be used so that some countries are not confronted with higher costs. Trade-offs appear to exist between the use of emission trading to achieve cost savings on the one hand, and ecosystem protection and distributional equity on the other.     

Provision of Human Resources for Water Resources and Hydropower Projects——A case of CGGC

1.Management of Human Resources in ChinaGezhouba Construction Group Corporation1.1Brief Introduction of CGGCChina GeZhouBa Construction Group Corporation(hereinafterreferred to as CGGC)is a super huge enterprise subordinatedto StateAssets Supervision and Administration Commission of PRC.It main-ly conducts water conservancy project,hydropower project,thermalelectric power project,nuclear electric power station,industrial andcivil works,as well as other works state-ratified.It is fa…     

钢板桩围堰在水位变动区和软弱地基中的应用

利用钢板桩作围堰,在水位变动区和软弱地基条件下,采取一定刚度的围护设施来满足深基坑的施工需要;成功地运用了一种既施工简便、节约材料又确保安全的围护结构。根据软土的特点和钢板桩的柔性特征,通过采用模拟基坑开挖过程,按照板桩墙围护结构的设计计算方法进行围堰设计,并通过实际施工中一定的控制措施和对围堰内力、变形监测,确保相邻建筑物和自身结构施工的安全。根据实际运用的效果监测表明,采用的钢板桩围堰,是可行而又较优的一种方案。     

河北省水利工程正效益分析

分析了河北省建国以来水利工程总体正效益，包括城市供水效益、农业灌溉效益、节水灌溉效益、治理盐碱土地效益、防止水土流失效益、防汛抗旱效益等。     

甘肃农村贫困成因与反贫困模式的再认识

甘肃农村贫困的原因十分复杂,但根本原因在于长期封闭的传统农业生产方式.甘肃省20年大规模扶贫开发的实践,成功探索了区域性开发扶贫、解决温饱的反贫困道路模式.新时期扶贫开发面临新的形势和任务,打破传统农业封闭的模式,积极探索适应新形势的扶贫开发途径,对甘肃农村反贫困具有重要的战略意义.     

浅谈城市污水回用的主要途径

本文对城市污水经处理后回用的主要途径进行了综述，其中重点介绍了回用到工业上的用途及其可行性。     

我国矿产资源开发利用现状与发展策略

矿产资源是人类赖以生存发展的物质基础,在现代化建设中占有重要的地位。我国是世界上矿产资源比较丰富、矿种比较齐全的少数几个国家之一。具有资源总量丰富但人均占有量少;矿床规模有大有小;贫矿多且富矿少等特点。多年来由于矿产资源的不合理开发利用,造成严重的环境污染。在我国许多地区废矿石大量堆放,地表水和地下水严重污染,区域地下水位下降,土壤和空气也受到侵害。为保证２１世纪我国国民经济的持续发展,必须采取以下几个方面的对策：①加强和改善矿产资源的管理;②加强地质勘查工作,增加矿产资源探明储量以适应国民经济的发展;③实行开源与节流并重的方针,走资源节约型发展经济的道路;④充分认识我国矿产资源的产出特点,完善矿产开发的产业机制;⑤依靠法制和科学管理,有效控制环境污染,保护矿产资源。     

国土资源开发与区域经济发展

国土资源的开发利用对区域经济发展有着基础性的 ,深远的影响 ,我国土地资源、矿产资源、海洋资源开发利用的区域特征已形成 ,但在空间布局、发挥区域资源比较优势、区域国土资源综合利用等方面仍存在一些问题。因此 ,应该在国土资源调查评价、规划、参与世界经济分工协作、法制建设、技术进步等主面采取相应的对策。