浅析淤地坝工程效益

淤地坝工程在防止或减少水土流失的同时,其效益也是多方面的.本文结合宜川县淤地坝工程建设的实践,对淤地坝工程的蓄水保土效益、经济效益、生态效益和社会效益进行了全面分析.     

新安县人工增雨效益评估办法

根据作业云回波面积和强度的变化,可定性判断人工增雨是否有效。对有效增雨,可根据高炮有效控制半径,计算出影响面积;根据作业区样本点作业后比作业前的降水平均增量和对比区样本点作业前后雨量平均变化量,可确定作业区平均增雨量(mm);根据增雨量,可计算出影响区增雨质量,并由此计算出经济效益。     

回顾与展望

2007年恰逢勘探所建所50周年,回顾过去,勘探所自建所以来先后完成了科研成果近400项,在众多方面取得了突破性进展,有134项获部级以上奖励,其中获国家创造发明奖和新产品奖6项,国家科技进步一等奖1项,部、省科技成果一等奖7项、二等奖21项,其他各类奖项99项。获国家专利21项,为我国探矿（岩土钻掘）工程技术处于世界前列起了十分重要的作用。展望未来,勘探所面对新机遇和新挑战,必须紧紧围绕国务院《关于加强地质工作的决定》和温家宝总理对加强地质工作的重要指示精神,加大对钻掘新技术、新设备的研发和推广应用力度     

作为赋存于花岗岩中钨锡矿化勘探指南的流体包裹体异常——前景展望

Studies of the distribution and abundance of fluid inclusions in granitic quartz associated with granite-hosted Sn-W mineralization of the British Isles reveal local and regional scale anomalies.At a sampling interval of c.5～50m,inclusion abundances increase towards zones of vein and stockwork mineralization exemplified by case history examples from exploration prospects in the Mourne Mountains of Northern Ireland and the Carrock Fell mining district of northwestern England.These steam aureoles provide a greater exploration target than the zone of visible alteration and mineralization and the lithogeochemical halo.But it is important to link them to geochemical data on fluid inclusion compositions,such as the semi-quantitative data from decrepitation-linked,ICP-AES (D-ICP)analysis,to optimize their exploration potential.Regional scale fluid inclusion anomalies,based on sampling intervals of c. 2km from the Sn-W mineralized granites of southwest England also broadly correlate with zones of intense mineralization in some areas. Regional-scale D-ICP analyses of quartz from SW England granites did not provide any convincing regional scale anomalies linked to mineralization except for positive boron anomalies around the centrally-mineralized Birch Tor area of the Dartmoor granite.Follow-up D-ICP analysis of quartz from stream sediments from this area,however,could be used to discriminate between samples related to mineralization from those draining unmineralized areas,using multivariate statistical analysis.At the present stage of development, the main contribution of fluid inclusion studies to mineral exploration is mostly limited to the conceptual stage where they continue to contribute to ore genetic theory and models.Costs and lack of knowledge transfer between research scientists and mineral explorationists limit their direct use during regional and target selection stages of exploration.Analysis of steam sediment quartz,using the more sensitive ICP-MS technique as a variant of the D-ICP method,appears to offer the greatest potential for future development as an exploration tool.     

湖北省耕地资源利用效益研究

构造了耕地产出效益系数、耕地消耗回报系数、耕地污染替代系数和耕地利用集约化系数等指标，对湖北省现有耕地资源的利用效益进行了定量分析。在此基础上，从观念更新、加大财政投资力度、优化农地使用制度等方面，提出了提高湖北省耕地资源利用效益的宏观对策，为合理利用耕地资源提供了建议。     

大源渡航运枢纽工程施工期水文预报及效益

介绍了大源渡航运枢纽工程施工期水文预报采用的方法、作业预报情况及产生的效益,阐述了水文预报对水工程施工的作用。     

洞庭湖“96·7”洪水与水文预报效益

洞庭湖“９６·７”洪水与水文预报效益雷激王建佳（湖南省水文水资源勘测局１９９６年７月,冷暖空气长时间交汇于我省上空,产生多次暴雨、大暴雨,致使资水、沅江和洞庭湖区发生了特大洪水。上述流域和洞庭湖区的主要地段洪峰流量和水位均接近和超过历史最高纪录,造成...     

加强管理减少消耗降低成本——小矿山创造高效益的基本经验初探

四川绵竹校办企业集团公司校办磷矿通过科学选择采掘方案,从实际出发,选用正确的采掘方式,抓质量、求效益等手段进行生产,并组织起开采 加工 储运一条龙的磷化工生产经营体系,使企业效益为社会瞩目。     

搞好国有大中型化工矿山企业的一点尝试

化工矿山生产经营与发展过程中问题与困难不少,富集团矿山公司通过创造利用有利的外部环境,在加强内部管理和挖潜上进行了一系列的改革,取得了较好的经济效益,企业凝聚力不断加强。