四川省若干治水方案的分析和讨论

归纳了四川省治理干旱的４种方法：工程治水、生态治水、环境治水和农业治水,并对其进行了评价分析。最后,提出了治水的综合建议。     

融安县金柑大小年结果的气候成因与对策

通过找出金柑结果大小年变异的年份, 分析两种类型年份间的气象条件, 得出金柑第一次开花花芽分化阶段出现长期低温天气和开花、果实膨大时期遇高温、干旱天气是造成融安县金柑小年结果的气候原因, 并提出相应的生产对策     

煤矿地质灾害的弹性波探测技术

断层、老窑、陷落柱和煤层缺失等地质异常是煤矿潜在的地质灾害,因地质异常不清造成事故和生产停顿的事,在煤矿时有发生。我们根据弹性波对不同地质体之间密度和波传播速度等物性差异的敏感性,分析了纵波、横波、瑞利波和槽波在地层中的传播特性,研究了弹性波地震探测技术。包括探测仪器研制、资料采集和数据处理技术研究。并应用该技术从地面、井下巷道和工作面侧壁,在许多煤矿进行地质异常探测试验,取得明显效果,为煤矿建井、掘进和开采提供了可靠的地质保障,并为煤矿装备了有力的探测手段。     

BACKGROUND VALUES AND TREND DISTRIBUTION OF Cu, Zn AND Ni IN SOILS IN CHINA

The background values of Cu, Zn and Ni are discussed based on the analytical data of 21 main soil types collected from various regions in China. According to statistics of many samples, the background value of Cu is 23.4±10.2 mg/ kg (482 samples), Zn 77.9±2.39 mg/ kg (474 samples), Ni 30.0±12.8 mg/kg (482 samples).     

A STUDY OF NUMERICAL MODELLING ON THE DEVELOPMENT OF DEPRESSIONS IN THE SOUTH CHINA SEA

The comparison analyses between two tropical depressions in the South China Sea are completed by numerical ex-periments with a limited area model developed in Guangzhou Institute of Tropical and Oceanic Meteorology. One of thedepressions develops and finally becomes a typhoon within 24 hours of the analyzing period (defined as DVD hereafter),and the other not (defined as UNDVD) The analyses show that their initial structures of temperature, humidity, pres-sure. wind and stability are obviously different from each other. There are a very deep wet layer and a clear warm-coredstructure in the mid-lower troposphere in the depression area in the DVD case, but with the warm core in the upperrather than lower troposphere arid a very shallow wet layer in the lower troposphere in the depression area in theUNDVD case. The developing and non-developing processes are successfully simulated by the model, showing that theCISK mechanism plays the most important role in the development of SCSDs (Tropical Depressions in the South ChinaSea). Several numerical experiments show that the structures of humidity and temperature in the depression area haveimportant effect on the development of SCSDs. It is favourable to the development of SCSDs when a very deep wet layerexists in the mid-lower troposphere or a warm-cored structure exists in the mid-lower troposphere instead of in uppertroposphere, and conversely, it is unfavourable to the development of SCSDs when the wet layer is very shallow in thelower troposphere or the warm-cored structure is in the upper troposphere rather than in mid-lower troposphere. Thestructures of stability for each case are also analysed, which shows evident differences between the two cases, with adeeper instability layer in the DVD case and a shallower one in the UNDVD case. Finally, the sensitivity of the devel-opment of the SCSDs to the vertical structures of humidity and temperature in the depression area is discussed.     

2008年汶川8.0级地震孕育发生的机制与驱动力

2008年5月12日四川省汶川发生了Ms8.0强烈地震.发震断层是龙门山断裂带的映秀一北川断裂.分析震前的GPS速度场发现,从巴颜喀拉块体西部到龙门山断裂带沿大约N105°E方向的缩短速率约为11mm/yr,龙门山断裂带的右旋走滑速率为1.1mm/yr,断裂带处于强闭合状态.四川盆地沿大约N107°E方向有少量的压缩变形,而沿SW方向有少量的拉张变形.     

2008年初呼和浩特地区持续低温、降雪成因分析

利用常规气象观测资料、以及国家气候中心的海温监测资料等,对2008年初呼市地区出现低温降雪天气的强度、范围、持续时间和灾害影响作了初步分析,并与历史同期进行了比较。分析表明:此次低温降雪天气是在近年来最严重的一次"拉尼娜"事件背景下发生的,与欧亚地区持续大气环流异常密切相关,在"北脊南槽"和西太平洋副高偏北偏强的形势下,北方冷空气不断南下,同时印度洋和孟加拉湾暖湿气流源源不断地往北到东北方向输送,冷暖气流在我国中东部地区频繁交汇,造成了我市持续低温、降雪异常偏多。     

GIS时代的高校特色地图学教育

在分析GIS教育、发展应用特点,以及地图学与GIS关系的基础上,对工科院校的GIS基础课程--地图学的教学内容、教学方法、形式、实习方法等进行研究探讨.     

地图集投影系统方法研究

本文较全面地研究了地图集投影系统的设计方法。包括系统论的引用；适用于地图集投影系统设计的新的地图集分类；地图集投影系统设计思想与步骤；地图集投影系统设计方法的发展趋势等内容。     

地图上中国边界的演变、形成及其表示方法探讨

在前人研究的基础上,结合长期的编图实践工作,从历史地理角度系统地梳理地图边界问题,探讨地图上中国边界的演变、形成规律及其表示方法。指出地图上中国边界的演变规律以及不同历史阶段的地图上中陶边界的表示方法和制图依据,中国版图确立后的中国边界和表示方法,现在的中国边界与历史上中国边界之间的关系,《中国国界线标准画法样图》发布...