Environmental impact of geothermal fluids on surface water, groundwater and streambed sediments in the Akarcay Basin, Turkey     

M. S. Dogdu  C. S. Bayari 《Environmental Geology》2005,47(3):325-340

In this study, the impact of geothermal water on ground and surface waters has been investigated in Akarcay Basin, Turkey. The release of thermal return water from district heating in the city of Afyon and from thermal baths has a considerable environmental impact on the main stream. Historical analyses of stream water quality data show that the present pollution is associated primarily with thermal return water of district heating system. Currently, about 6% of stream water comprises of thermal water. The pollution seems to degrade the water quality in Lake Eber. Streambed sediments were found to be in equilibrium with polluted water and may lead to additional pollution in lake water. Thermal groundwater intrusion to fresh water production wells was detected mainly at sites close to geothermal fields. Solutions to remove thermal water from surface environment are suggested.  相似文献   

Sustainability schizophrenia or “actually existing sustainabilities?” toward a broader understanding of the politics and promise of local sustainability in the US     

Rob Krueger  Julian Agyeman 《Geoforum》2005,36(4):410-417

As an approach to development, many see capitalism as reaching across an enormous range of scholarly domains and political interests. For some time geographers and others have begun to conceptualize capitalism as less of a system of intrinsic economic logic and more a collection of social and discursive relationships. By bringing capitalism into the “discursive world” these commentators and others have provided the theoretical ground for an exploration of alternative economic forms, especially those that are more socially and ecologically just. This paper makes an argument for putting sustainable development through the same theoretical scrutiny. Drawing on examples from the US we recruit the concept of “actually existing sustainabilities” from Altvater’s concept “actually existing socialisms” as an entry point to this conversation. Our purpose is to show that the potential for sustainability in the US exists in current local policies and practices if we rethink how we frame it.  相似文献   

Building deliberative public-private partnerships for waste management in Asia     

Tim Forsyth 《Geoforum》2005,36(4):429-439

Public-private partnerships in environmental policy should not simply be viewed in instrumental terms as means of providing environmental infrastructure and services, but also as sites where norms of environmental concern and political accountability are formulated and replicated. Deliberative public-private partnerships--or partnerships that allow greater public participation in the formulation of these norms--may therefore become an important new form of local environmental governance and help make partnerships more relevant to local environmental needs. This paper examines case studies of public-private partnerships in waste-to-energy projects in the Philippines and India to identify how principles of institutional design may enhance the deliberative nature of public-private partnerships in environmental policy. The paper argues that current approaches to deliberative, or cooperative environmental governance concerning public-private partnerships need to acknowledge insights from network theory concerning the communication of environmental and political norms before they can be successfully transferred to developing countries.  相似文献   

河套盆地吉兰泰凹陷中生代构造层划分及意义     

杨德相  屈争辉  陈树光  李壮福  吴健平  王建广  武函 《高校地质学报》2020,26(6):691-703

2017年河套盆地临河坳陷油气勘探取得重要发现，基于区域中生代以来大地构造演化系统梳理，以钻井与地震对照、研究区与邻近盆地类比为研究方法，划分河套盆地临河坳陷南部吉兰泰凹陷中生代构造层，并绘制其分布范围，探讨其赋存特征与意义。结果表明：研究区中生界除三叠系外发育齐全，厚度巨大，且白垩系自上而下可细分为K1 ^I、K1 ^II和K1^III三个构造层；除K1I构造层全区广覆式发育外，其它构造层呈楔状—缓楔状，长轴沿主控断裂NNE向延伸；研究区自中生代以来盆地性质经历了早中侏罗世断陷、早白垩世早期断陷、早白垩世中期断拗转换和早白垩世晚期拗陷的演化过程；F ₃和F ₇断层之间的K1 ^II和K1 ^III构造层、F ₇断层东部的J构造层均具良好的油气勘探前景。  相似文献   

四川雅安地区古冲积扇主量元素特征及其意义     

姜大伟  张世民 《第四纪研究》2020,(1):105-113

第四系是与人类生活关系密切的地层,山区地带的第四系主要由河流沉积物组成,这些沉积物的表面风化程度具有重要的环境意义。四川省雅安市地区发育了中更新统砾石层构成的古冲积扇名邛冲积扇和丹思冲积扇,现今废弃于岷江与青衣江之间,遭受了不同程度的侵蚀风化。对两个冲积扇不同位置采集样品,尝试利用主量元素分析冲积扇的风化程度。经过实验发现,主量元素分析可以很好地应用于第四系的测试,砾石间填充的基质砂能够合理反映沉积物经历的风化过程。实验结果表明,沉积物主量元素中长石矿物元素Ca、Na大量流失,而稳定矿物元素Si、Ti等偏高,说明冲积扇经历了长期的风化淋溶作用。A-CN-K图解体现出冲积扇经历了早期的斜长石风化,已经进入以钾长石和伊利石风化为标志的中期阶段。Pettijohn图解表明名邛冲积扇样品含有更多的石英砂岩,沉积物的成熟度较高。这些指标说明名邛冲积扇相比丹思冲积扇经历了更强的风化作用。结合冲积扇的年龄发现,风化速度随年龄的增长呈现减速的特征,体现了风化作用的阶段性.  相似文献   

Towards a moral socio-environmental economy: A reconsideration of values     

《Geoforum》2015

In this intervention article I contribute to discussions of moral economy by arguing that scholars should reconsider the nature of value. Neoliberalism considers only exchange value. As a consequence neoliberal policies try to manage problems such as climate change with economic systems and instruments that are mis-calibrated to the material realities they are meant to represent. Value has spatial and temporal characteristics. Recognizing the spatial and temporal dynamics of value leads to new means of resource valuation, such as extending the time-frame of instruments and changing the nature of privatization. In conclusion, I argue for the need for new theories of use value.  相似文献   

量子无线通信技术在海洋环境监测中的应用     

李浩  任宇辉  刘凤娇 《海洋科学》2018,42(2):94-98

以量子技术为基础,利用光子基本粒子的量子纠缠原理,由量子态携带在线实时海洋环境监测数据信息,构建基于量子无线通信的海洋环境监测系统。该系统在无线通信中可确保数据的安全性、系统性、及时性和准确性,提高信息化和灵活化水平,可为海洋环境规划、环境管理、环境治理等提供全面安全可靠的监测数据。  相似文献   

It’s Time To Learn About Learning: Where Should the Environmental and Natural Resource Governance Field Go Next?     

Andrea K. Gerlak  Tanya Heikkila  Sharon L. Smolinski  Derek Armitage  Dave Huitema  Brendan Moore 《社会与自然资源》2019,32(9):1056-1064

This Commentary reflects on the state of the scholarship on learning for environmental and natural resource policy and governance. How have we been learning about learning? We highlight theoretical and empirical advancements related to learning, as well as areas of divergence between learning theories and frameworks, and underdeveloped knowledge around processes and outcomes. To address these limitations and improve progress in both theory and practice, we offer recommendations for learning scholarship by focusing on how to collectively engage in ‘learning about learning’.  相似文献   

老挝班康姆铜金矿床成矿作用研究及其指示意义   总被引：1，自引：0，他引：1  

卢见昆  赵延朋  陈晓锋  康铁锁  莫江平 《矿床地质》2020,39(6):1122-1140

班康姆铜金矿床位于墨江-黎俯火山弧带的中段，成矿条件优越，区内中性侵入杂岩具有岛弧钙碱性火山岩的地球化学特征，属火山岛弧环境。氢、氧同位素特征及黄铁矿流体包裹体的He、Ar同位素特征均指示流体为岩浆流体与大气雨水型地下水的混合流体，晚期经历了开放系统的持续瑞利去气过程。硫同位素组成表明成矿系统的硫源主要为深源地幔硫，推断Au、Cu应来自地幔源区，在俯冲消减的构造背景下，携带大量Cu、Au等成矿金属构成富矿初始岩浆流体。热液成矿作用经历了高温矽卡岩蚀变阶段、中温青磐岩热液蚀变矿化阶段、低中温金矿化阶段和超低温热液碳酸盐化阶段4个阶段，中低温阶段为主要的矿化阶段，而北东-北北东向次级断裂带成为浅部重要的容矿空间。流体包裹体及稀土元素特征指示了矿床深部存在隐伏的岩体，很可能为含矿的斑岩体，这对班康姆矿床乃至成矿带的研究及勘查具有重大的意义。  相似文献   

War,by Conservation     

《Geoforum》2016

In this paper I argue that there has been a critical shift towards war by conservation in which conservation, security and counter insurgency (COIN) are becoming more closely integrated. In this new phase concerns about global security constitute important underlying drivers, while biodiversity conservation is of secondary importance. This is a significant break from earlier phases of fortress conservation and war for biodiversity. In order to develop a better understanding of these shifts, this paper analyzes the existing conceptual approaches, notably environmental security which seeks to understand how resources cause or shape conflict, and political ecology approaches that focus on the struggles over access to and control over resources. However, this paper indicates the limitations of these existing debates for understanding recent shifts, which require a fresh approach. I chart the rise of the narrative I call poachers-as-terrorists, which relies on the invocation of the idea that ivory is the white gold of Jihad, a phrase which is closely associated with an Elephant Action League (EAL) report in 2012 which claimed Al Shabaab used ivory to fund its operations. This narrative is being extended and deepened by a powerful alliance of states, conservation NGOs, Private Military Companies and international organizations, such that it is shaping policies, especially in areas of US geo-strategic interest in Sub-Saharan Africa. As a result conservation is becoming a core element of a global security project, with significant implications for conceptual debates and for conservation practice on the ground.  相似文献