自然生态遥感监测与分析——以雅安市宝兴县为例     

石江南  甘泉  潘星  刘飞 《测绘》2015,(1):45-48

本文以雅安市宝兴县为例,基于三期卫星遥感影像,提取宝兴县地表覆盖信息,开展自然生态遥感监测,介绍了自然生态遥感监测所需资料、方法和技术流程,并对监测结果进行了详细分析。  相似文献   

巴基斯坦达什特卡恩斑岩型铜矿地质特征及找矿潜力     

万方良 《地质与勘探》2015,51(1):187-196

达什特卡恩斑岩型铜矿位于巴基斯坦查盖斑岩型铜矿带北端的阿富汗-巴基斯坦边境上,迄今为止,矿区内已发现有两个规模很大的铜矿化体。笔者在以往勘查资料和野外地质找矿工作的基础上,对成矿地质背景、矿床地质特征、矿床地球化学和地球物理特征及找矿潜力进行了初步分析。矿区出露东西两个矿化体,主要与两个英云闪长斑岩岩株以及一个侵入角砾岩管有关;斑岩体中蚀变以钾化和绢英岩化为主,泥化较弱,青磐岩化分布在蚀变带最外围。氧化矿石矿物以孔雀石和硅孔雀石为主,次生矿石矿物以辉铜矿和铜蓝为主,原生矿石矿物以黄铜矿和斑铜矿为主。1∶1万土壤地球化学测量显示西部矿化体铜元素异常面积约0.45 km2,平均值482.97×10-6,东部角砾岩矿化体异常面积约0.32 km2,平均值2238×10-6,矿区钼含量平均值为21×10-6,经调查铜异常为矿致异常。激发极化法测量显示西部异常范围小,电阻率很低,在45~90 m范围内可能是含硫化物所致,而东部异常范围大,电阻率低,经查证与热液侵入角砾岩管有关。在西部矿化体施工了3个钻孔进行异常查证,结果显示铜平均含量0.079%~0.28%。经分析研究认为,在达什特卡恩深部具有良好的找矿前景。  相似文献   

色球和日冕的MHD加热机制     

王华宁 《天文学进展》1996,(3)

扼要地介绍了色球和日冕加热问题的研究历史。随着空间太阳观测技术的进步，人们认识到色球和日冕加热机制主要与MHD过程有关。因此，在本文中着重介绍四种MHD色球和日冕加热机制：（1）阿尔芬波；（2）MHD湍动；（3）场向电流；（4）磁重联。由于这四种加热机制的有效性都需要通过高分辨率观测来判定，所以空间太阳观测对于研究色球和日冕加热问题具有重大意义。  相似文献   

在线地理数据管理系统建设关键技术探讨     

唐权  陶旸 《现代测绘》2013,36(2)

面向网络服务的在线地理数据制作和管理是建设高质量地理信息公共服务平台的基础.本文从在线地理数据管理系统建设的角度入手,分析了在线数据管理系统涉及的主要功能和技术指标,进而从实体数据自动更新、历史数据管理、地理编码、海量数据管理和出版级地图制作技术等五个方面探讨了系统建设中涉及的主要关键技术问题,期望对在线地理数据建设提供借鉴.  相似文献   

Flood prediction in southern strip of Caspian Sea watershed     

S. Chavoshi  Wan Nor A. Sulaiman  B. Saghafian  Md Nasir Bin Sulaiman  L. Abd Manaf 《Water Resources》2013,40(6):593-605

  相似文献   

潮汐水位振幅和位相变化研究及其在地下水异常分析中的应用          下载免费PDF全文

石云  刘春平  廖欣  唐彦东  万飞 《地震学报》2013,35(3):421-429

将多孔介质中井-含水层-隔水层的潮汐水位振幅和位相的计算公式推广到裂隙饱水岩体潮汐分析中, 分析了裂隙含水层中井与裂隙, 裂隙与微裂隙的潮汐孔压响应原理和水流交换过程, 提取了影响裂隙含水层潮汐水位振幅和位相的主要因素, 应用井-裂隙排水产生的井水位-引潮高的振幅比A和位相差α₂主要随径向等效导水系数T同向变化, 裂隙和微裂隙(孔隙)排水产生的孔压-引潮高的振幅比D和位相差α₁主要随不排水条件下微裂隙与裂隙间振幅比E'/E反向变化的规律, 提出了潮汐井水位振幅和位相的8种不同变化类型, 分析了不同类型所反映的含水层形变, 并用于分析东川、 弥勒和西昌川03等3口井井水位振幅和位相变化的成因.   相似文献   

饱和砂岩在温度和频率域的衰减和速度频散          下载免费PDF全文

席军  宛新林  周城光  杜赟  席道瑛 《地震学报》2013,35(6):914-922

利用Metravib热机械分析仪, 在天然地震的频率和温度范围内, 首次对泵油和甘油饱和两种孔隙度的彭山砂岩的衰减和速度频散进行了实验研究． 结果表明, ① 泵油饱和彭山砂岩对频率和温度的依赖呈热激活弛豫规律; ② 杨氏模量和弹性波速度与孔隙度、 温度呈负相关, 与饱和液体的黏滞系数、 频率呈正相关; ③ 频散效应因频率上升而增强, 因温度增高而减弱． 这一规律性的结果为地震波理论研究提供了实验基础．   相似文献   

Coal mine water management: optimization models and field application in North China     

Qiang Wu  Bill X. Hu  Li Wan 《水文科学杂志》2013,58(4):609-623

Abstract

This paper considers the complexity in resolving the conflicts between mine drainage, water supply, and environmental protection for the coal basin of North China, and presents a management optimization framework that addresses these multiple conflicting issues simultaneously in the most cost effective manner. Due to the various unpredictable accidents which may occur in the coal mining process, such as water bursts, gas leaks, fire and collapse of coal beds, the beneficial use of drainage water from the coal mines is generally low. This case study attempts to address the problem of low beneficial usage for drainage water using the Jiaozuo coal mining district in Henan Province, China. By combining a finite-element groundwater simulation model with an optimization code, the economic benefits of using the drainage water as a stable water supply is maximized, while the adverse impact of mine drainage on the environment is controlled. The results indicate that the management model developed in this study achieves an excellent economic outcome and can serve as a potentially powerful tool for solving mining-related water management problems in the coal basin of North China.

Citation Wu, Q., Hu, B. X., Wan, L. & Zheng, C. (2010) Coal mine water management: optimization models and field application in North China. Hydrol. Sci. J. 55(4), 609–623.  相似文献   

基于GF2卫星数据的矿山遥感监测方法及对象识别研究          下载免费PDF全文

李思发  李亮  安全 《贵州地质》2022,39(1):87-92

基于GF2高分辨率遥感影像的数据特征和固体废弃物(尾矿库、废石堆)、矿山建筑、中转场、地下开采硐口、塌陷坑、矿山环境恢复治理等矿山遥感监测的主要地物目标特征,系统地建立了研究区主要矿山地物的遥感解译标志.通过对研究区的矿山路网和管网分析,确定研究区矿山总体分布情况,结合建立的矿山地物解译标志,对各区块内部图斑细化解译,...  相似文献   

Groundwater and surface-water utilisation using a bank infiltration technique in Malaysia   总被引：1，自引：1，他引：0  

Mohd Khairul Nizar Shamsuddin  Wan Nor Azmin Sulaiman  Saim Suratman  Mohamad Pauzi Zakaria  Kamarudin Samuding 《Hydrogeology Journal》2014,22(3):543-564

Bank infiltration (BI) is one of the solutions to providing raw water for public supply in tropical countries. This study in Malaysia explores the use of BI to supplement a polluted surface-water resource with groundwater. Three major factors were investigated: (1) contribution of surface water through BI to the resulting abstraction, (2) input of local groundwater, and (3) water-quality characteristics of the resulting water supply. A geophysical method was employed to define the subsurface geology and hydrogeology, and isotope techniques were performed to identify the source of groundwater recharge and the interaction between surface water and groundwater. The physicochemical and microbiological parameters of the local surface-water bodies and groundwater were analyzed before and during water abstraction. Extracted water revealed a 5–98 % decrease in turbidity, as well as reductions in HCO₃ ^?, Cl^?, SO₄ ^2?, NO₃ ^?, Ca²⁺, Al³⁺ and As concentrations compared with those of Langat River water. In addition, amounts of E. coli, total coliform and Giardia were significantly reduced (99.9 %). However, water samples from test wells during pumping showed high concentrations of Fe²⁺ and Mn²⁺. Pumping test results indicate that the two wells used in the study were able to sustain yields.  相似文献