Soil evolution features of debris flow waste-shoal land

The reclamation and utilization of debris flow waste-shoal land plays an important role in the mitigation and control of debris flow hazards, which thus contributes a lot to the exploitation of insufficient land resources in mountainous areas and the reduction of losses caused by debris flow. The aim of this paper is to discuss the features and mechanism of soil evolution of debris flow waste-shoal land so as to search for the available modes of its reclamation and utilization. The Jiangjiagou Ravine, a typical debris flow ravine, was selected to study soil evolution features of debris flow waste-shoal land based on the analysis of soil physieochemical properties and soil microstructure. It was found that the soil evolution rates of debris flow waste-shoal land varied with different modes of reclamation. For the land which had been reclaimed for less than lO years, soil evolved most rapidly in paddy fields, and more rapidly in dry farmland than in naturally restored waste-shoal land. For the land which had been used for more than lo years, the soil evolution rates of dry farmland, naturally restored waste-shoal land and paddy farmland decreased in the file. For the same utilization period of time, significant differences were recognized in soil evolution features under different modes of reclamation. Analysis data showed that soil clay content, soil thickness, the psephicity of skeleton particles and contents of microaggregates （〈0.02 mm） in paddy farmland were all highest. Soil nutrients and porosity of dry farmland were better than those of paddy farmland and naturally restored waste-shoal land, and those of paddy farmland were superior to those of naturally restored waste-shoal land. Paddy farmland characterized by rapid pedogenesis, stable evolution and high utilizability was the priority candidate for the reclamation and utilization of debris flow waste -shoal land.     

大气负荷对新疆地区地壳形变和地面重力变化的影响

基于ECMWF全球大气模型和中国地面气候资料日值数据集中新疆及周边的气象站气压数据,根据弹性地壳形变理论,采用移去-恢复法,利用负荷格林函数法和球谐函数法,计算新疆及周边区域2011～2015年大气负荷变化对地壳垂直、水平形变的影响,同时采用大气导纳方法计算大气变化对地面重力的影响。结果表明,大气负荷对新疆地区垂直形变的影响达到cm级,对地面重力的影响可达10μGal;大气负荷影响具有明显的季节性。     

挂职陇南,投身地震灾后恢复重建

一年前的2008年5月12日,在四川省汶川发生8级特大地震灾害。6月30日,党中央提出“统筹干部人才资源支持抗震救灾”的要求。7月2日,中组部与团中央共同为奔赴地震灾区参与灾后重建的第九批“博士服务团”送行并召开座谈会,李源潮部长提出“加强智力救灾,帮助灾区走上科学重建之路”的希望和要求。7月9日,我作为国家测绘局选派的成员,与来自国家发改委,     

矿山地质环境保护规定

第一章总则 第一条为保护矿山地质环境,减少矿产资源勘查开采活动造成的矿山地质环境破坏,保护人民生命和财产安全,促进矿产资源的合理开发利用和经济社会、资源环境的协调发展,根据<中华人民共和国矿产资源法>和<地质灾害防治条例>,制定本规定.     

探边测计算储量方法的数值研究与实际考虑

利用探边测试计算储量有压降法、压力恢复法和麦斯盖特法。实际应用中发现，三种方法计算的储量差别很大。为此，使用油藏数值模拟方法对3种计算方法进行检验。结果证明：压降法计算的储量较为精确，压力恢复法和麦蓁盖特法计算的储量误差较大，只能当作参考。     

EOF迭代方案恢复夏季大气环流场的试验

本文设计了一种恢复夏季大气环流场的EOF(经验正交函数)迭代方案,并利用1951～1984年中国夏季降水距平场和北半球500hPa夏季高度距平场作镢复试验,数值试验效果较好.此项工作表明:利用某些长时间序列的资料通过EOF迭代方案恢复历史时期大气环流是可行的.     

PRINCIPLES OF RIVER TRAINING AND MANAGEMENT

River regulation and river training have been performed for various purposes and negative effects have been shown in numerous cases. In some cases the negative effects are so serious that humans have to consider to "renaturalize" the regulated rivers. Only by using the strategy of integrated river management the diverse river uses and natural fluvial processes and ecological systems may be harmonized. Based on analysis of case studies and data collected from literatures this paper presents the concept of integrated river management and four principles of river training. The integrated river management comprises: 1) taking the watershed, upper stream basin including the tributaries, middle and lower reaches and the estuary as an integrated entity in the planning, design and management; and 2) mitigating or controlling the negative impacts on hydrology, erosion and sedimentation, fluvial processes, land use and river use, environment and ecology while in achieving economic benefit from water resources development, flood safety management and hydropower exploitation. River training and management should be in accordance with the four principles: 1) extending the duration of river water flowing on the continent, which may be achieved by extending the river course or reducing the flow velocity; 2) controlling various patterns of erosions and reducing the sediment transportation in the rivers; 3) increasing the diversity of habitat and enhancing the connectivity between the river and riparian waters; and 4) restoring natural landscapes.     

数字容荧技术介绍

本文主要介绍了数字灾难发生后给我们造成的影响及伤害,同时,也介绍了预防和解决数字灾难的办法即建立起企业自已的容灾系统。容灾的目的就是快速恢复数据。平时我们应做充分及详细的灾难恢复计划;并且要定期进行及灾难恢复的测试。对于我们现在正在搭建和使用的信息系统,容灾体系的建立是保护数据的最后一道防线。     

振幅处理技术在探地雷达资料处理中的应用

作者在文中简述了在自激自收（10天线距）的探地雷达资料处理中，振幅处理（振幅恢复、道内振幅平衡）和道间振幅均衡的方法原理。在实现编程后，应用于实际资料处理，用以增强雷达的深部弱信号，平衡道内的振幅能量和滤除干扰噪声，取得了良好的效果。