大数据环境下地理信息产业发展的几点思考     

周顺平  徐枫 《测绘软科学研究》2014,(1):45-50

大数据背景下地理信息产业的发展有了新的驱动力,通过思考这种驱动力对产业发展可能产生的影响,分析指出了大数据在地理信息产业中的中心地位和重要价值,综述了大数据给地理信息产业的涵盖范围、关键技术和服务模式所带来的重大变革,探讨了大数据技术对于GIS传统技术优化升级的几个着力点,并剖析了大数据技术在地理信息产业的相关应用中所面临的制约因素。  相似文献   

硬梁包水电站泥石流对沟口建筑物的影响评价     

李廷友 《四川地质学报》2013,(3):332-335,339

概述了硬梁包水电站左岸磨子沟泥石流的基本特征、泥石流危险性、泥石流发展趋势,泥石流对工程区的影响进行了分析和评价,为解决该泥石流沟治理设计提供了依据。  相似文献   

四川石棉大水沟碲矿床区域地球化学特征   总被引：1，自引：0，他引：1  

张海  卢啟富  何明友  郭佩佩  李媛媛  杨德传 《四川地质学报》2013,(3):357-360

大水沟碲矿床具有良好的多金属矿集区的区域成矿地球化学背景。研究表明大水沟碲矿床碲成矿物质可能源于深部,且与小金河一箐河等深大断裂有密切联系。  相似文献   

Geological note: Authigenic Sr‐Ba‐Ca carbonate minerals in coals of the Hunter Valley,New South Wales     

P. J. Tarabbia 《Australian Journal of Earth Sciences》2013,60(6):617-620

Strontianite (SrCO₃), witherite (BaCO₃) and alstonite (CaBa[CO₃]₂) were among the range of epigenetic coal cleat/fracture carbonates identified within the Wittingham Coal Measures, Jerrys Plains Subgroup in the Hunter Valley. Three stages of diagenetic cement development, all related to basin evolution, are postulated. Material for the development of the various carbonates was derived from: basinal pore fluids, surrounding rock and organic matrix as a result of diagenetic exchange, active mass transport or devolatilization of basement rocks during metamorphism, including plutonic intrusion.  相似文献   

Limiting hydrochemical factors for sustainability of water resources: The Cisjordanian experience     

Eliahu Rosenthal  Joseph Guttman  Peter Möller 《Chemie der Erde / Geochemistry》2009,69(3):191-222

In Cisjordan, surface- and groundwater flow are either towards the Jordan Valley-Dead Sea-Arava Valley (the Rift) or the Mediterranean Sea. Due to upstream exploitation by riparians to the Jordan River, the historical annual flow, which fluctuated between 250 and 1100 Mm³, has declined to a mere 100-200 Mm³. The remaining flow south of Lake Kinneret is highly polluted and heavily loaded with salts. Lake Kinneret (Sea of Galilee) is one of the major water resources in the area. Annually, between 200 and 700 Mm³ reach the Lake as surface and groundwater flow. The relatively high salinity of the Lake is caused by thermomineral water discharging from springs and seepages located onshore and on the bottom of the Lake. The main factors causing deterioration of the groundwater quality in the Rift are of geogenic character. These are different types of brines, whose outflow and penetration into freshwater aquifers was triggered by overpumpage. Contemporary encroachment of seawater caused by intensive water exploitation in the Coastal Plain is manageable and reversible. However, due to lack of hydrogeological evidence, no such statement can be made about the circulation of seawater beneath the Coastal Plain and into the deep-seated Yarkon-Taninim aquifer or the upflow of brines in the Rift.The flow regimes of the different brine bodies could not be elucidated. Whether each such brine-body flows by its particular hydrological regime or whether the movement of the different bodies is intradependent or interdependent with the regional movement of fresh groundwater, remain open questions. Therefore, sustainable development of groundwater resources is clearly dependent on the elucidation of the relationship between changes in the pressure of the brine with depth and its relationship to the overlying freshwater.The average total annual recharge of all water sources in Cisjordan is 1820 Mm³, which means that the total production of water must be managed within the limits of this annual volume. During drought years, total groundwater extraction exceeds the safe yield, causing drastic lowering of water levels and upflow of saline waters from greater depths.Because of the structural complexity of aquifers and hydrochemical variability of the numerous groundwater bodies, new hydrochemical methods have been developed for the identification of groundwater bodies and for the elucidation of their origins. These methods combine macrochemical, microchemical, and isotopic evidences. By combining distribution patterns of rare earths, yttrium and stable isotopes, a complete picture of catchment lithology and the altitude and latitude of precipitation could be obtained.The area west of the Jordan River is characterized by the occurrence of transboundary surface- and groundwater basins in which fresh and saline water and brines flow across political borders between Israel and the Palestinian Authority. It is very difficult to assess separately the annual safe yield of water resources for each of the two national entities. Neither country may dispose independently of its waters and is usually at the mercy of the other riparian. There is as yet no general multilateral international treaty in force allocating the water resources of international watercourses. At present there are two rules for the management of the waters of an international drainage basin—the rule of Equitable Distribution, and the obligation Not to Cause Significant Harm. The rules of equitable distribution have tended to focus on the issue of quantities of water rather than on quality of water, which is really relevant to the issue of equitable distribution. Future negotiations on the uses of the basin will need to deal with issues of characteristic salinities and geochemical features and on their impact on equitable sharing of water resources.  相似文献   

Comparison of Fry strain ellipse and AMS ellipsoid trends to tectonic fabric trends in very low-strain sandstone of the Appalachian fold–thrust belt     

K.C. Burmeister  M.J. Harrison  S. Marshak  E.C. Ferr  R.A. Bannister  K.P. Kodama 《Journal of Structural Geology》2009,31(9):1028

In moderately to highly strained sandstones, both the long axis of the bedding-parallel finite-strain ellipse, as calculated by the normalized Fry method, and the projection of the long axis of the AMS ellipsoid on the plane of bedding, align well with local “structural grain” (trends of cleavage, folds, and faults). This relationship implies that results of both 2D Fry and AMS analyses represent the local layer-parallel tectonic strain component. Do both methods provide comparable results for very low-strain sandstone (e.g., <5%)? To address this question, Fry and AMS analyses were conducted in very low-strain sandstone from two localities in the Appalachian foreland fold–thrust belt: near Rosendale in New York and the Lackawanna synclinorium of Pennsylvania. We compared the map projections of both bedding-parallel Fry ellipses and AMS ellipsoids to the local structural grain. In both study areas, projections of the long axis of Fry strain ellipses do not cluster in a direction parallel to structural grain, whereas the projection of the long axes of AMS ellipsoids do cluster closely to structural grain. This observation implies that in very low-strain sandstone, AMS analysis provides a more sensitive “quick” indicator of tectonic fabric than does normalized Fry analysis.  相似文献   

湖北省钟祥市汉江河谷平原区浅层孔隙水的脆弱性评价   总被引：1，自引：1，他引：0  

袁建飞  郭清海 《地质科技情报》2009,28(4)

以MAPGIS为工作平台,以地下水类型、盖层岩性、地下水埋深为评价指标,利用国际上广泛应用的GOD模型开展了湖北省钟祥市第四系浅层孔隙水的脆弱性评价.研究结果表明:区内浅层孔隙水的脆弱性评分值在0～0.7间,其中极低脆弱性区(评分值=0～0.1)、低脆弱性区(评分值= 0.1～0.3)、中等脆弱性区(评分值=0.3～0.5)、高脆弱性区(评分值=0.5～0.7)和极高脆弱性区(评分值=0.7~10.0)的面积分别占评价区总面积的0.3 %,0.0 %,64.1 %,35.6 %,0. 0 %.换言之,钟祥市汉江河谷平原区浅层孔隙水总体上具有中等脆弱性和高脆弱性,且脆弱性最高的地段几乎全部分布在汉江沿岸.为解决钟祥市工农业发展带来的高污染风险性与地下水具有较高脆弱性这一对明显的矛盾,应加强汉江河谷平原区的地下水资源的管理工作.  相似文献   

四川宁南县银厂沟-骑骡沟铅锌矿床成因浅析   总被引：3，自引：0，他引：3  

杨红英  钟康惠  刘清双  周慧文 《四川地质学报》2009,29(1):24-28,36

四川宁南县银厂沟-骑骡沟铅锌矿床产于震旦系上统灯影组白云岩中,主要受断裂控制。矿体多为透镜体状、网脉状和细脉状。与成矿有密切关系的硅质条带为富硅热液后期充填产物,显示后期热液充填成矿特点。分析研究认为该矿床在成矿的大地构造背景和其它特点方面,均与美国中部密西西比河谷型（MVT型）铅锌矿有相似性。  相似文献   

综合工程物探在九寨沟核心景区水循环系统研究中应用评价     

武斌  汪智  张淳  刘鹏鹏  易攀 《四川地质学报》2009,29(2):213-216

综合物探技术是一种高新技术,在岩土工程中有广泛的应用前景。文章介绍了瑞雷波勘探和直流电法在九寨沟核心景区水循环系统中的应用,对方法原理进行了简单阐述,并探讨了对综合工程物探技术在九寨沟景区第四系化学沉积钙华层和冰碛地层的划分的分析评价。  相似文献   

铅锌产业链结构状况及海外资源战略   总被引：1，自引：0，他引：1       下载免费PDF全文

陈甲斌 《江苏地质》2009,33(1):102-107

我国铅锌产业发展虽然成绩显著,但资源问题是制约铅锌产业链协调发展的重要因素,开发利用海外铅锌资源是促进我国铅锌产业健康发展的长期战略方针。在总结国外海外资源开发经验的基础上,阐述了我国铅锌资源海外战略的基本原则及近期与中长期的战略目标,并对战略重点做了详细部署。  相似文献