丽水市九龙湿地公园生态共建体系的建立     

林丹 《湿地科学与管理》2010,6(3):60-62

生态共建是实现环境友好、生态和谐、物质能源高效利用的经济社会发展模式。以生态共建的理论提出了丽水市九龙湿地公园规划建设的开发模式,并通过分析公园在建设发展过程中所涉及的主体因素,论述了其生态共建体系的建立。  相似文献   

临沂市水系林业生态保护体系建设规划初探     

陆发利  郝亮  王学东  刘莉  阚荣飞  陈雪  闫陈辉 《湿地科学与管理》2010,6(4):13-15

研究分析了临沂市水系分布状况,进行了生态功能区与重点保护区区域划分。引入流域生态修复技术及森林健康经营、生态型林果生产经营等先进营造林技术,设计了水系生态防护林带、封山育林、退耕还林、荒山造林、湿地保护与修复工程建设、示范区建设,突出林业生态保护功能,增加森林总量,提升森林生产力,解决区域水系水土流失和水资源污染等生态问题。  相似文献   

Diatom community dynamics in a tropical,monsoon-influenced environment: West coast of India     

Priya M. D’Costa  Arga Chandrashekar Anil 《Continental Shelf Research》2010

Diatom communities are influenced by environmental perturbations, such as the monsoon system that impact the niche opportunities of species. To discern the influence of the monsoon system on diatom community structure, we sampled during two consecutive post-monsoons (2001 and 2002) and the intervening pre-monsoon at Mumbai and Jawaharlal Nehru ports along the central west coast of India. Characteristic temporal shifts in diatom community structure were observed across the sampling periods; these were mainly driven by temperature, salinity and dissolved oxygen saturation. The nutrient-poor pre-monsoon period supported low abundance yet high species richness and diversity of diatoms. Coscinodiscus, Cyclotella, Thalassiosira, Triceratium, Pleurosigma, Skeletonema and Surirella were the most dominant genera. Both the post-monsoon periods, following dissimilar monsoon events, were dominated by Skeletonema costatum, but differed in some of the residual species. Thalassiosira and Thalassionema spp. dominated mostly during post-monsoon I whereas Triceratium and Pleurosigma spp. dominated during post-monsoon II. To understand the underlying ecological mechanisms involved in such dynamics, we focus on the dominant diatom species in post-monsoon periods, S. costatum, that contributes up to 60% to total diatom cell numbers. This research is relevant in light of the fluctuating monsoon regimes over the Asian continent, the confounding effects of anthropogenic eutrophication and the resulting cascading effects on trophic web dynamics.  相似文献   

某农药厂场地土壤地下水污染修复指导值探讨   总被引：4，自引：0，他引：4       下载免费PDF全文

李鹏  何江涛  陈鸿汉  王建飞  刘俊峰 《水文地质工程地质》2011,38(3):98-103

参考加拿大Alberta SGRG层次性分析模式,选择其中Tier 1、Tier 2两层次进行分析,结合适合我国的参数计算出了某农药厂土壤地下水中的有机污染物1,2-二氯乙烷、1,2-二氯丙烷修复值,得到了通用的Tier 1修复指导值分别为:渗坑土壤中1,2-二氯乙烷6.2μg/kg,1,2-二氯丙烷67μg/kg;场地地下水中1,2-二氯乙烷、1,2-二氯丙烷均为5μg/L。在此基础上,结合实地调查获取场地参数,利用Tier 2评价对指导值进行修正,确定了场地最终修复目标值:渗坑土壤中1,2-二氯乙烷为11μg/kg,1,2-二氯丙烷为45μg/kg;地下水中1,2-二氯乙烷、1,2-二氯丙烷仍为5μg/L。各途径修复值的改变较符合层次性评价的理论,即Tier 2修复值较Tier 1宽松;但1,2-二氯丙烷的保护DUA途径修复值较Tier 1更加严格,这是由于场地特定条件造成的。  相似文献   

Distribution and ecological risk assessment of some heavy metals in coastal surface sediments along the Red Sea,Egypt   总被引：2，自引：0，他引：2  

《国际泥沙研究》2016,(2):164-172

The ecological risk assessment for Al,Zn,Cu,Ni,V,Pb,Cd,and Hg in surface sediment collected from the Egyptian Red Sea coast was evaluated using the Geo-accumulation Index(I_(geo)).Sediment Enrichment Factor(SEF) and Potential Ecological Risk Index(PERI) methods.The predominant heavy metal,aluminum,showed high concentrations along both of Aqaba Gulf(4378.8 ± 2554.1 μg/g) and southern part of the Red Sea(2972.8 + 1527.5 μg/g).while it recorded the lowest concentration in Suez Gulf(829.7 ± 398.2 μg/g).The determined heavy metal concentrations had the order of Al Zn -Ni V Pb Cu Cd Hg.The statistical analyses showed some correlations among the heavy metals contents.Several international sediment quality guidelines were used to estimate the quality of the collected sediments.Interestingly,the recorded average heavy metals concentrations were lower than those of the permissible contents for sediment quality guidelines.The Geo-accumulation index calculations(I_(geo)) proved that the investigated region could be classified as an unpolluted area.Sediment Enrichment Factor(K_(SEF)) study showed high values in Suez Gulf region.The single pollution index analysis of heavy metals in the sediments(C~i_f) indicated that Al,Zn,V,and Pb were of natural origin,while Ni,Cd and Hg were seriously affected by human activities.Interestingly,amongst,all the determined heavy metals,Cd and Hg gave moderate ecological risk indicators.  相似文献   

Divergent Perspectives on Water Security: Bridging the Policy Debate     

Patricia A. Gober  Graham E. Strickert  Douglas A. Clark  Kwok P. Chun  Diana Payton  Kristin Bruce 《The Professional geographer》2013,65(1):62-71

Environmental policy discussion is replete with references to water security, food security, ecosystem health, community resilience, sustainable development, and sustainable urbanism. These terms are, by their very nature, ambiguous and difficult to define; they allow room, however, for a variety of actors to conceptualize water, food, ecological, economic, and urban problems in ways that allow them to move forward on contentious issues. This article focuses on the idea of water security and asks how it is conceptualized and used for regional policy debate in western Canada. We asked fifty-eight water stakeholders from the Saskatchewan River Basin to define water security, identify major barriers to security, and prioritize water problems. Responses showed there are myriad ways to think about water security, ranging from narrow conceptualizations, such as reliability, quality, and quantity, to broader sustainability perspectives about the nature of resource development and its social and economic consequences. The human dimensions of water security (governance, land use, and competing demands) were assigned higher priority than its biophysical aspects (flooding, droughts, and climate change). Framing water security to emphasize the human capacity to manage uncertain and rapid biophysical and societal change offers the opportunity to unite actors who otherwise would be separated by core environmental values, definitions of water security, provincial context (Alberta vs. Saskatchewan), and occupation.  相似文献   

南四湖生态湿地产业发展模式   总被引：2，自引：2，他引：0  

徐建国  郑国建  孔维健 《湿地科学与管理》2013,(1):45-48

通过对南四湖湿地调研,分析了南四湖发展生态湿地产业的优势和存在问题,提出了适合南四湖生态湿地产业发展的模式。  相似文献   

湖北沉湖湿地生态补偿机制的浅析     

陈君  赵柒新 《湿地科学与管理》2013,(2):63-65

湿地生态补偿是指由湿地环境受益主体补偿给湿地生态服务的生产者与提供者。沉湖湿地自然保护区是武汉市目前唯一的省级湿地自然保护区,是浅湖和沼泽湿地草甸相连续的湿地生态系统。在对沉湖湿地的生态功能和生态补偿必要性分析的基础上,开展了生态补偿的前期调查,对沉湖湿地补偿原则、范围、对象、标准、资金来源等提出一些想法,以供探讨。  相似文献   

Heavy metal pollution and assessment in the tidal flat sediments of Haizhou Bay,China     

Rui Zhang  Li Zhou  Fan Zhang  Yingjun Ding  Jinrong Gao  Jing Chen  Hongqiang Yan  Wei Shao 《Marine pollution bulletin》2013

The heavy metal inventory and the ecological risk of the tidal flat sediments in Haizhou Bay were investigated. Results show that the average concentrations of heavy metals in the surface sediments exceeded the environment background values of Jiangsu Province coastal soil, suggesting that the surface sediments were mainly polluted by heavy metals (Cd, Cr, Cu, Mn, Pb and Zn). In addition, the profiles of heavy metals fluxes can reflect the socio-economic development of Lianyungang City, and heavy metals inputs were attributed to anthropogenic activities. Cr, Cu, Pb and Zn were mainly present in the non-bioavailable residual form in surface sediments, whereas Cd and Mn were predominantly in the highly mobile acid soluble and reducible fractions. The ecological risk of the polluted sediments stemmed mainly from Cd and Pb. According to the Sediment quality guidelines (SQGs), however, the adverse biological effects caused by the heavy metals occasionally occurred in tidal flat.  相似文献   

Hydrochemical characterization of an acid mine drainage-affected reservoir: the Sancho Reservoir,Huelva, southwest Spain     

J.C. Cerón  M.L. de la Torre  J. Borrego  M. Santisteban  T. Valente 《水文科学杂志》2013,58(6):1213-1224

Abstract

The objectives of this study were to discover the relationship between variables in a water reservoir and the hydrochemical variations related to acid mine drainage (AMD), and to describe the horizontal stratification related to vertical salinity and variations in metals present in the region. The information obtained may be used for establishing risk evaluation criteria and to design future remediation strategies, which could be useful for new dams. The hydrochemical characterization was based on a sampling campaign performed in October 2011. A total of 28 samples, at 1-m-deep intervals, were obtained. The hydrogeochemical study of the polluted reservoir shows that the dilution effect is not sufficient to neutralize AMD contributions from mining activity. Sampling carried out from the surface water to the deepest points reveals stratification of the reservoir that allows it to be included in the group of monomictic and holomitic lakes.