风浪对太湖水体中胶体态营养盐和浮游植物的影响

为了解不同风浪条件下太湖水中胶体态营养盐和浮游植物含量的特征, 选择不同风速情况进行现场观测和采样, 用切向流超滤法获取胶体, 测定胶体态有机碳、氮、磷及其他形态营养盐含量. 同时收集浮游植物样品, 测定其密度和生物量. 结果表明, 在风速小于4m/s时胶体氮(CN)和胶体磷(CP)含量随风速变大而升高, 而在风速大于4 m/s时其含量不再升高, 甚至略有降低; 叶绿素a(Chl-a)、浮游植物密度、蓝藻密度和蓝藻生物量均在风速小于4m/s时随风速增大而升高, 在风速大于4 m/s时随风速增大而降低, 说明小风浪有利于蓝藻生长或漂浮, 而大风浪对其生长或漂浮不利. CN和CP含量与浮游藻类含量呈显著正相关, 表明在藻类生长旺盛的夏季, 太湖水中胶体氮、磷的主要来源为藻类产物.     

环太湖地区水污染灾害综合防治能力评价

以水污染灾害为研究对象,从水污染驱动力、污染状态、人类响应3个方面构建水污染灾害综合防治能力评价指标体系,运用物元可拓评价模型,使用熵权法确定权重,计算出环太湖地区的综合关联度并进行分析,结果表明:2014～2018年环太湖地区水污染灾害综合防治能力总体上在不断提升,综合防治能力最好的为无锡,其次为常州、苏州和湖州,嘉...     

黄土高原半干旱区侧柏林群落土壤呼吸日变化及季节动态变化特征

Desertification is one of the most serious eco-environmental problems around Qinghai Lake. Based on GIS and RS, GIS analysis was used to obtain the information of spatial-temporal change and different pattern of desertification in each county around Qinghai Lake in four phases of 1976, 1987, 1995 and 2006. Using the function of intersect and overlay supported by ARCGIS, with analyzing attributes of vector RS images, we obtained transition data and established transfer matrix of land-use types in recent 30 years, besides, protracted land-use transition maps of all desertification classes. In further, we analyzed transition quantity and direction of desertification in each county, moreover, reconstructed the process of spatial-temporal evolution of desertification. The results are showed below: (1) it′s the transition between desertified land and others but not in the desertified that played the main role in Gangcha and Gonghe County, while the transfer between desertified lands were greater than that with other land-use types in Haiyan County. (2) Extremely severe desertified land mainly distributes in Ketu and Sand Islands that belongs to Haiyan County, and moderate desertified land in riversides of Gangcha County, also, the light desertification expanded too rapidly to become the most desertified land-use type in the surrounding of Qinghai Lake since 1976. (3) By using relative change rate of desertified land, the regional variability rank from top to toe was Gangcha, Haiyan and Gonghe.     

传统文化与现代旅游景观的契合 ——重庆龙水湖规划与设计

文章通过对重庆龙水湖景区规划设计构思的分析，阐述了传统文化与现代旅游景观融合的规划设计手法。     

太湖生态模拟系统构建与应用

湖泊生态系统模拟在湖泊富营养化研究中发挥着越来越重要的作用，是湖泊生态生态系统管理的重要手段。湖泊生态系统模型及其相关软件的发展经历了从简单的回归模型、单一的营养盐平衡模型到目前复杂的生态系统动力学模型。本文详细的介绍了湖泊生态模拟的原理、结构框架设计、功能、运行环境及参数等特性，借助太湖有关资料建立了太湖生态系统模拟模型，并对该模型进行了验证分析，验证结果表明该模型在太湖有很好的适应性。     

湿地生态脆弱性评价及其恢复与重建研究——以洞庭湖区为例

洞庭湖区是中国具有代表性和典型意义的湿地分布区，又是中国重要的商品粮基地，其良好的生态环境质量是实现区域经济社会持续发展的重要保证。在分析洞庭湖区湿地主要生态环境问题的基础上，建立了湿地生态脆弱性评价的相关指标体系，对洞庭湖区17个县市进行了湿地生态脆弱度的量化评价，最后有针对性地提出了洞庭湖区湿地生态恢复与重建的基本对策。     

滇池草海东风坝水域生态修复技术工程应用

本文介绍了我院最新开发的湖泊生态修复集成技术包括湖滨陡坎沿岸带基底修复技术、植物浮岛生态技术、入湖河渠污染控制技术和湖滨沿岸带大型水生植物群落恢复技术在滇池草海东风坝及老干鱼塘水域生态修复工程的实际应用情况，本项目在滇池草海约3．3km。水面实现了大型水生植物恢复面积约1．0km^2，在湖滨带形成由挺水植物、浮叶植物、浮水植物及沉水植物等不同植被类型组成的生态结构，大型水生植物覆盖率达30％，恢复水生植物共计20余种，栖息的水禽及鸟类目前已达27种，生物多样性显著提高，呈现出郁郁葱葱、生机勃勃的景象，生态修复区良性水生植被生态系统已经初步建立，湖泊自然生态环境和水质得到了明显改善，水体透明度增幅约为65％-70％，TN和TP去除率约为30％，取得了良好的环境和社会效益，为滇池及超富营养化湖泊的生态修复提供了宝贵的经验和工程示范。     

Distribution of Redox-sensitive Elements in Bottom Waters,Porewaters and Sediments of Rogoznica Lake (Croatia) in Both Oxic and Anoxic Conditions

Geochemical, mineralogical and sedimentological analyses were carried out to contrast two different sites (respectively characterized by permanently oxic and anoxic conditions) in a small, meromictic, seawater lake. In fact, due to relatively high organic matter content, and reduced water exchange, the Rogoznica Lake has almost permanent anoxic conditions below the depth of 12 m, where sediment can be considered an anoxic–sulphidic sedimentary environment. Different water column and sediments redox conditions affect the distribution and speciation of major redox-sensitive metals (Fe, Mn, Mo), reduced sulphur species (RSS) and dissolved organic C (DOC). Trace metals, especially those that accumulate in anoxic–sulphidic environments (Fe, Mo) showed a marked enrichment in the solid phase, whereas the low solubility of sulphides leads to low porewater concentrations. The relatively high sedimentary enrichment of Mo (up to 81 mg/kg) also confirms highly anoxic conditions within the Rogoznica Lake sediments. Results clearly show that chemical species within the sediments will tend towards equilibrium between porewater and solid phase according the prevailing environment conditions such as redox, pH, salinity, DOC.     

太湖流域水资源综合规划数模研究--水质模型的建立与率定

太湖流域水资源综合规划数模研究建立了一个覆盖全流域的，包括污染负荷模型、河网湖泊相耦合的水量水质模型的数字流域系统。该系统实现了流域的耦合求解，已在流域水资源规划中发挥了重要的作用。本文建宴了流域水质模型，并在水量模型率定的基础上进行了水质模型的率定。率定结果与实测数据吻合较好，相对误差多在30％之内，一定程度上反映了太湖流域的水质概况。     

奥运湖不同补水方案营养状态趋势分析

规划中的奥运湖位于奥林匹克公园，运行中将采用人工补水方式。为保证未来奥运湖的正常景观生态功能，源水经奥运公园中人工湿地处理后再引入湖中。在规划设计阶段，提出三种补水方案：（1）清河再生水厂出水经湿地处理后入湖，（2）清河河水经湿地处理后入湖，（3）经湿地处理达地表水环境标准中的Ⅳ类水要求后入湖。为了考察不同水源补水方案对奥运湖的水质保障程度，本研究对不同方案下奥运公园湖水质的时间、空间变化过程予以模拟，分析评价奥运湖可能出现的富营养化状况，并对各个补水方案带来的富营养化风险和基本成因予以推断，为奥运湖的设计运行提供技术依据。结果表明，方案3的富营养化风险最小、水质保障程度最高。结合三种补水方案水质特点，推断磷是主要限制因子，所以控制磷的浓度是保证水质安全、降低富营养化风险的重要途径。