甘肃庆城县土地利用规划中的水生态环境修复研究     

张常桦  陈妮  赵亮  江悠丽 《地下水》2011,33(5):170-173

针对甘肃庆城县独特的土地利用过程中出现的一系列水生态环境问题,使用生态修复的概念,对其用地进行安排布局,并提出水生态环境建设用地空间管制、安全控制分区及水土流失区域坝系建设等修复措施。  相似文献   

多管降水法在电力线路工程基坑降水过程中的研究应用     

王亚军 《地下水》2011,33(5):14-15

以往榆林沙漠地区基坑降水采用先开挖后降水,容易出现基坑边坡塌方,降水难度大,费工费时,降水效果差,本工程基坑降水采用了多管降水法,从管井的沉设方法,PPR新材料的运用,井管的制作等方面,开发研究出小范围内基坑降水的新方法,降水效果好,可在具有相同水文地质条件的工程降水中应用。  相似文献   

县域主体功能区划中可利用水资源指标测算评价研究——以山西省河津市为例   总被引：1，自引：0，他引：1  

牛西平  周杜辉 《地下水》2011,33(3):139-142

可利用水资源是县域主体功能区规划指标体系的重要指标之一,主要是评价一个地区剩余和潜在可利用水资源对未来社会经济发展的支撑力.以河津市9个乡镇为基本单元,分析各个乡镇的可开发利用水资源,调水量等指标,得出河津市人均水资源潜力空间分布图,并针对各个乡镇在主体功能区中的不同职能提出更加切合乡镇具体情况的水资源利用措施.  相似文献   

西北地区水资源再生利用研究     

刘颖  王伯铎  张秋菊  崔晨  邓鑫 《地下水》2011,(4):107-110

水资源是西北地区社会经济发展和生态环境建设的重要制约因素,水资源的高效利用是推进西北地区发展过程中必须解决的问题。文章根据西北地区水资源短缺的现状,分析该地区水资源的特点及其利用中存在的主要问题,并以西安为研究案例,提出西北地区水资源再生利用的途径。  相似文献   

中国东部农耕区土壤微生物碳的分布及影响因素          下载免费PDF全文

王尚  蒋宏忱  黄柳琴  余涛  杨忠芳 《地学前缘》2011,18(6):134-142

对中国东部不同纬度带的6个地区的土壤微生物碳进行了研究。结果表明土壤微生物碳的分布受地理位置的影响较为明显:由北向南,东北地区的土壤微生物碳要高于其他地区。作为土壤有机质变化的灵敏度指标———微生物熵(微生物碳/总有机碳),在同一耕作方式下,其在不同地区的变化受土壤利用方式的影响较为明显:在连作系统下,菜地>粮地;而在轮作系统下,粮食-蔬菜轮作>蔬菜-蔬菜轮作。利用相关性分析寻求影响微生物碳分布的环境因素,结果表明,微生物碳(Micro-C)与土壤有机碳(TOC)、全氮(TN)、土壤含水率呈极显著正相关,而有机碳和全氮的分布主要受地理位置的影响。对不同土壤类型的微生物碳和微生物熵进行相关性分析,结果显示pH、年均温、含水率、TOC和TN是主要影响因素,关键影响因素因土壤类型不同而各异。  相似文献   

南水北调中线水源地河水地球化学特征与流域侵蚀   总被引：1，自引：0，他引：1  

徐志方  唐杨 《矿物岩石地球化学通报》2011,30(1):26-30

丹江口水库及其上游流域是南水北调中线工程的水源地,本文讨论了水源地河流水化学与锶同位素(87Sr/86Sr)组成变化特征,目的在于了解水源地流域河流地表水溶质的物质来源以及岩石风化侵蚀过程和人为活动的影响。流域内河流水化学组成以Ca2+、HCO3-为主,Mg2+和SO42-次之,反映了碳酸盐岩风化溶解起控制作用的典型特征。水化学分析表明水源地河水受到工农业活动等人为因素的影响;河流87Sr/86Sr同位素地球化学研究表明,流域岩石风化输入至少存在三个不同端员(硅酸岩、石灰岩和白云岩)之间的混合。水源地流域内硅酸岩和碳酸岩的风化侵蚀速率分别为38.6和4.4 t/km2.a,总岩石风化侵蚀速率高于全球河流平均值。  相似文献   

Key challenges for maritime governance in West Africa: Fishery-based lessons from Guinea and Mauritania     

B. Trouillet  T. Guineberteau  M. Bernardon  S. Le Roux 《Marine Policy》2011

Maritime governance stakes are important in West Africa, if only due to the dominant role of fisheries, which coastal populations mainly depend on. In this context, with reference to the fishery sector mostly studied in two countries (Guinea and Mauritania), this paper aims to identify and synthesize the challenges to be met towards developing the governance of marine spaces. To this end, the analysis is based on field knowledge, which provides input into a grid set according to the various integration levels of the concept of ICZM. This paper thus reports the major methodological obstacles to be overcome, commensurate to the stakes insofar as marine policies can and must contribute to the economic and social development of this region.  相似文献   

Editorial: Reflections from Ireland     

Valerie Anne Cummins  Kathrin Kopke 《Marine Policy》2011

Responses of governance systems to change in coastal and marine ecosystems vary from country to country around the globe. Lessons can be learned from country specific case studies, as national governments strive to adapt and respond to issues of concern. This short paper highlights the benefits of a country-specific, special edition of Marine Policy, with a focus on Ireland. Despite the uniqueness of socio-ecological setting, many of the issues faced by policy makers in Ireland, such as the reconciliation of economic development and conservation needs, are shared elsewhere. This special edition was produced at the end of the ‘Celtic Tiger’ in Ireland. As a result, it reflects an era when economic development was very much a priority. The same period represented an unparalleled investment in marine science since the foundation of the State in 1922. Despite this, the papers in the Special Edition point to varying degrees of progress in policy integration and implementation. Papers covering a range of sectors (fisheries, ocean energy, conservation and fisheries) and disciplines (economics, science and management) will be of interest to academics, policy makers, students and practitioners of marine policy.  相似文献   

Trust relationships between fishers and government: New challenges for the co-management arrangements in the Dutch flatfish industry     

Birgit I. de Vos  Jan P.M. van Tatenhove 《Marine Policy》2011

Until the 1990s fisheries were largely managed by the state. Since then, Dutch government and the sector increasingly recognized that a fishing industry cannot be managed effectively without the cooperation and participation of fishers to formulate policy and to implement and enforce laws and regulations. As a result, in the nineties, the existing neo-corporatist arrangement was replaced by a co-management system in the Dutch flatfish fishery. Co-management is often seen as leading to greater procedural legitimacy and subsequently compliance. However, constructing an effective co-management arrangement is not only a matter of building institutions but also a matter of building trust relations between the government and industry. Institutional arrangements such as co-management can contribute to these trust building processes; however, a too strong reliance on institutional arrangements can lead to distrust when new challenges are being faced and institutional arrangements fail to adapt to these changes.  相似文献   

就若干矿床的类型、成矿物质来源及辉钼矿含铼量的地质意义等与毛景文研究员商榷   总被引：1，自引：0，他引：1  

黄典豪 《地质论评》2015,61(5):990-1000

毛景文研究员等多年来将陕西洛南黄龙铺碳酸岩脉型钼(铅)矿床分别更改为碳酸盐(岩)型、热液碳酸盐脉型或脉型,把河南栾川南泥湖斑岩体形成复合的南泥湖—三道庄斑岩—夕卡岩型钼(钨)矿床,分解为南泥湖斑岩钼钨矿床和三道庄夕卡岩型钼钨矿床,和把长江中下游地区的绝大多数夕卡岩型铜(铝)矿床和少数斑岩—夕卡岩型铜(钼)矿床更改为斑岩—夕卡岩—层控铜—金—钼矿床等。本文对毛景文等更改这些矿床的矿床类型,以及毛景文等认为"辉钼矿的Re含量可指示成矿物质来源","大水沟热液型碲(金)矿床的成矿流体及其他物质主要来自于地幔"和"温泉钼矿是与S-型花岗岩有关的斑岩钼矿床是一种新类型和新发现"等所存在的问题进行探讨。希能理清某些矿床学问题,进一步促进矿床学的发展。  相似文献