An overview of the integration of ozone systems in biological treatment steps.

Despite the well-known potential and performance of combined biological and ozonation processes for wastewater treatment, only few full-scale applications are published. Beside the synergistic effects of such process combination, which lead to oxidation of recalcitrant and inhibitory compounds or intermediates by enhancement of their biodegradability, the key for raising applicability is the improvement of the ozonation efficiency. An overview about the history and progress of full-scale applications, which deals with combined ozonation and biological treatment is given. Recently more than 40 applications exist, but many of them are not published. Therefore, a couple of selected not yet published applications have been mentioned in this paper. Landfill leachate and industrial wastewater treatment were mostly applicated, while treatment of municial wastewater treatment plant (WWTP) effluents are of increasing interest due to several advantages such as disinfection, decolourisation and removal of persistent dissolved organic carbon (DOC) for water re-use and groundwater recharge.     

梨园河渡槽工程施工技术综述

渡槽工程的施工方法是多种多样的,梨园河渡槽施工采用了单排架现浇和槽身现场浇筑使用混凝土预制块砌筑一定断面型式的墙体作支撑,完全是创新方法,伸缩止水缝和连接段等部位的施工也有独到之处,从而使工程建设达到了节省资金、缩短工期、保证质量及增加安全性等良好效果,是大断面单排架“U”型薄壳渡槽施工方法的有益探索。     

浅论上海城市排水系统体制规划的可持续性发展

上海以"治水为中心,治污为核心"的截污治污和河道整治,在水环境治理和保护上确实获得一定的成效,实现了近期规划目标。但排水系统改造在工程实践中也暴露出许多矛盾和问题,严重制约了水污染控制和水生态环境保护效果。围绕成功举办2010年上海世博会而亟待解决的重大水问题,作为上海世博会的建设,城市让生活更美好,迫切需要建设一种可持续性的、生态型的新型城市排水系统     

古汉语概念场研究综述

将概念场理论引入古汉语词汇研究始于20世纪80年代末,同以往的原子主义式研究相比,无论研究的深度还是研究的广度都有了很大的拓展,出现了可喜的成果。但同时还存在有待于进一步扩展的地方,如研究的领域、研究的角度和理论建树等。     

An overview of simulation-based hydrodynamic design of ship hull forms

This review paper presents an overview of simulation-based hydrodynamic design optimization of ship hull forms. A computational tool that is aimed to accomplishing early-stage simulation-based design in terms of hydrodynamic performance is discussed in detail. The main components of this computational tool consist of a hydrodynamic module, a hull surface modeling module, and an optimization module. The hydrodynamic module includes both design-oriented simple CFD tools and high-fidelity CFD tools. These integrated CFD tools are used for evaluating hydrodynamic performances at different design stages. The hull surface modeling module includes various techniques for ship hull surface representation and modification. This module is used to automatically produce hull forms or modify existing hull forms in terms of hydrodynamic performance and design constraints. The optimization module includes various optimization algorithms and surrogate models, which are used to determine optimal designs in terms of given hydrodynamic performance. As an illustration of the computational tool, a Series 60 hull is optimized for reduced drag using three different modification strategies to outline the specific procedure for conducting simulation-based hydrodynamic design of ship hull forms using the present tool. Numerical results show that the present tool is well suited for the hull form design optimization at early design stage because it can produce effective optimal designs within a short period of time.     

Impact of operational maintenance on the asset life of storm reed beds.

This paper reviews the operation of storm reed beds to determine whether the current system of operational maintenance is contributing to premature process failures and if not, to identify other factors of importance. Twelve storm reed beds of the horizontal subsurface flow type, at seven locations in the South Warwickshire area of the United Kingdom, were surveyed. Each survey consisted of a site visit, an interview with the operators in charge and an assessment of the treatment performance based on routine monitoring data. Although some sites suffered from varying degrees of sludge accumulation, surface blinding and/or weed growth, all effluent concentrations remained far below the consent levels. Thorough operational maintenance on a reed bed is proven to be important for the asset life. However, there are other factors or features of a reed bed that play a more pivotal role in premature process failure such as the lack of pretreatment and a premature operation of the storm overflow.     

风力发电机组控制技术综述

论述了大型并网型风力发电机组的控制技术方面的现状和发展趋势，展望了有关风电并网新的研究方向。     

The waterways bird survey of the British trust For Ornithology: An overview

This paper describes the background and methodology of the British Trust for Ornithology's Waterways Bird Survey. The scheme aims to produce breeding population indices for a range of riparian species based on survey work carried out annually at over 100 sites throughout Britain and Ireland. Habitat data are collected at each site which allow assessments to be made of factors affecting both the numbers and distribution of particular species. The effects of habitat changes can also be investigated. The scheme is illustrated with reference to population trends for coot (scientific names of species in the text are given in Table I) and yellow wagtail. The results of habitat studies are discussed for moorhen. This shows that densities reach a maximum on canal sites, and that on sections of the River Ouzel, Bedfordshire and Grand Union Canal, Buckinghamshire, populations were adversely affected by dredging and regrading operations.     

吉林省水利建设重点工程项目综述

简要介绍了吉林省“十一五”水利发展任务,并简述了吉林省六大水利重点项目,即：老龙口水利枢纽工程、“引嫩入白”供水工程、哈达山水利枢纽工程、大安灌区工程、吉林省中部城市引松供水工程、四湖沟水电站工程的概况和进展情况。     

江西省水利工程建设稽察工作概述

水利项目稽察作为水利工程建设与管理的重要手段,在水利事业发展中发挥着独特作用.水利稽察围绕中心,服务大局,充分发挥"检查、反馈、整改、提高"的功能,已经成为水利建设管理中不可或缺的重要环节,成为水利监督工作的重要组成部分,成为水利建设工程安全、资金安全、干部安全和生产安全的有力保障,成为水利事业跨越发展的坚强支撑.本文根据江西省水利稽察工作中发现的工程问题,提出应在实际工作中注意的质量问题,以期为今后水利工程建设及管理的健康发展提供参考.     

明渠堰槽测流技术综述

明渠采用堰槽量水建筑物测定流量是一项较古老的技术,距今已有147年的历史。但时至今日,生产上仍在广泛使用,说明它具有一定的生命力。随着水资源的紧缺、商品化和污水排放采用总量控制等形势的到来,该技术将面临着新的发展和承担更大的重任。 在推广应用的过程中,堰槽量水建筑物已有很大的发展,     

Phosphorus recovery--an overview of potentials and possibilities.

The endeavour towards a sustainable society has led to an interest in the recovery and recirculation or reuse of phosphorus from wastewater among environmentalists and politicians. In a recent interdisciplinary investigation commissioned by the Swedish Environmental Protection Agency, an attempt was made to evaluate different possibilities to recover phosphorus from wastewater or its fractions; systems based on source separation of urine or of combined toilet wastes, on the extraction of phosphorus from sludge, from ashes after incineration of sludge or from wastewater as well as the direct recirculation of hygienised digested and dewatered sludge were studied. Aspects like technology, environmental effects, resource economy, economy, markets, organisational aspects and user aspects were studied. In this overview the potential and possibility to recover and recirculate phosphorus from wastewater is discussed, mainly based on the findings in this investigation.     

非充分灌溉条件下水稻需水量计算

本文提出了非充分灌溉条件下水稻不同生育阶段的需水量计算模型，并运用实测资料对模型进行了验证。     

GCL——一种新型复合土工材料的特性及应用综述

 对GCL基本产品的结构类型、水力特性、强度特性、隔气性等作了概括性的介绍，通过图解说明了GCL在环境工程和水利工程中的应用情况，最后指出了其在工程应用中应注意的几点问题。     

不同蒸散发产品在汉江流域的比较研究

蒸散发是流域水循环和能量循环的重要环节,准确估算蒸散发对流域水循环研究具有重要意义,同时也可以为流域水资源优化配置和可持续利用提供支撑。利用汉江流域观测的逐月降水数据、径流数据以及重力卫星(GRACE)反演的流域蓄水量变化数据计算水量平衡蒸散发(ET_WB),以ET_WB为标准在月尺度上评估4类9种不同蒸散发产品(陆面模式产品ET_clm、ET_noah、ET_mos、ET_vic;再分析数据产品ET_jra;基于模型树集的通量观测产品ET_jung和基于能量平衡的诊断模型产品ET_modis、ET_PML、ET_Zhangke)在汉江流域的适用性。结果表明基于模型树集的通量观测产品和基于能量平衡的诊断模型产品精度较好,再分析产品次之,陆面模式产品(除ET_clm)较差。ET_jung、ET_modis和ET_clm在月尺度上与ET_WB有着较好的相关性,结果误差相对较小;ET_noah、ET_mos、ET_vic结果误差相对较大。该研究结果可以为汉江流域水循环研究和南水北调中线工程管理提供科学参考。     

海堤工程波浪溢流问题研究进展

为了对全球气候变化背景下的海堤安全提供参考,回顾了波浪溢流研究的发展历程,从波浪溢流引起的越堤流量、内坡水流特征、越堤水流紊动特征等方面对波浪溢流相关的最新研究成果进行综述,认为波浪溢流的基本水力学参数均能够较为合理地计算得出。在此基础上分析了溢流、越浪、波浪溢流的等价性,指出了下一步需要针对波浪溢流区别于越浪的水动力特征及其对海堤作用与越浪对海堤作用的异同开展研究,为海堤的设计、评估和加固提供依据。     

土石坝地震动输入机制研究综述

土石坝的动力反应特性和抗震性能是水电工程界关注的焦点。设计地震动及其输入方式的合理确定是进行大坝结构动力反应分析和安全性评价的前提,也是影响分析结果可靠性的重要因素。本文对土石坝动力分析地震动输入机制研究中涉及到的地震动参数的确定和地震动输入方式等的研究现状进行了总结、评述,并在此基础上提出了需进一步研究的问题。     

GPM降水产品评估研究综述

从IMERG、DPR和水文模拟3方面综述了GPM降水产品的评估工作。GPM降水产品在复杂地形和高海拔地区均表现不佳,甚至出现不可靠的情况,还存在明显的季节差异性,主要表现为夏秋两季的表现较好,春冬两季表现相对较差。指出GPM对微量降水、固态降水和极端降水的观测还需进一步的完善,未来的卫星降水评估工作应从传感器层面上展开。