Predicting sediment movement and tracing their origins is crucial on the constantly changing earth's surface. Luminescence has a special potential for determining the provenance of sediments. Its benefits include being suitable for quartz and feldspar, which are ubiquitous in geology. Because of its characteristics, luminescence can be used for investigate, tracking changes in transport rates, and determine the sources of sediment. Clarification of the tracer effect of luminescence on the provenance also means that it can be used as an indicator of landscape or environmental evolution. More work is needed to test the application of luminescence properties in different deposition environments to expand the capabilities and scope of its application. We selected a core from a comparatively enclosed region on the South China coast in order to investigate the connection between luminescence properties and landscape change. Using grain size and other proxies, we investigated the sedimentary environment. Tested the luminescence sensitivity, and established a luminescence chronology of the area dating back to the Middle and Late Holocene. And it turns out, the change in quartz luminescence sensitivity in the closed area with uniform lithology of the source rocks is controlled by the changes in sedimentary dynamics and the history of burial and transportation. Therefore, it is further suggested that luminescence sensitivity can be used as an indicator to identify landscape changes.

Increasing coastal reclamation activities have been undertaken to alleviate the shortage of land resources, posing significant challenges to the coordination of coastal reclamation, economic development and environmental protection. Over the past few decades, coastal reclamation has occurred extensively in the coastal region of China, especially the east coast, while the value of coastal wetlands and ecosystems has only been well under-stood and appreciated in the last decade. More recently, there is an important new trend to restore parts of reclaimed land to coastal wetlands for environmental protection purposes, which requires reliable reclamation detection results as a foundation for policy. This study aimed to propose a reclamation detection framework based on the spatiotemporal fusion of Landsat TM and Sentinel-1A. To utilize the complementary information of optical and SAR images, the proposed framework models the common and proprietary information of both types of data separately in a sparse manner. Then, with more reliable and detailed information, reclamation areas can be distinguished by band math and threshold segmentation using the spatiotemporal fusion of Landsat TM and Sentinel-1A images. Finally, taking Fuzhou in eastern China as an example, we provided a detailed analysis of coastal reclamation. The results confirmed that the proposed algorithm was effective for rapidly detecting sus-pected locations of coastal reclamation and showed great potential for monitoring the changes occurring in the coastal zone.

Chalks are generally believed to have formed in shallow marine environments. However, the consensus on sources of Fe and origin of hematite in red chalks remains elusive. To better understand the origin of hematite in the Middle Cretaceous red chalks on the eastern coast of England, the evidence has been gathered through diffuse reflection, trace element and iron isotope analysis and combining with the lithologic and stratigraphic characteristics. Rare earth element (REE) patterns exhibit upper-continental-crust-like signatures such as enrichment in light REEs and depletion in heavy REEs. The Fe isotopic composition of the red chalk is typically heavier than that of igneous rocks (except for one sample) and shows negative Eu anomalies (Eu/Eu* = 0.58-0.73), which indicates that the hematite in the red chalk is not of microbial or hydrothermal, but of sedimentary origin. At the same time, the analysis of trace elements suggests that the felsic rocks and sedimentary derivatives are the source of non-carbonate components in the red chalks. The pedogenic features such as mudcracks, secondary white chalks, and calcareous nodules appear in the red chalks, as documented through the field stratigraphic observations. Based on the above evidence and the sedimentary environment of the overlying and underlying layers, it is inferred that the red chalk was deposited in the supratidal environment that had undergone some degree of desiccation and pedogenic modification. (C) 2021 Elsevier B.V. All rights reserved.

通过对福州盆地首山路ZKCS钻孔岩芯的AMS 14C及光释光(OSL)年代测试、岩性特征、黏土浑浊水电导率值和地球化学元素测定、粒度分析以及硅藻鉴定,对钻孔沉积物的沉积环境进行分析,并与ZK004钻孔结果进行对比,结合全球古气候及区域构造记录,确认首山路ZKCS钻孔记录了两次完整的海侵—海退旋回,第一次海侵结束时间约50 ka,第二次海侵发生在全新世期间.两次海侵发生的主要原因不同,第一次海侵发生在MIS3早期,对应于前人命名的"福州海侵",主要原因是区域构造下沉,加之此时古气候变暖引发海面上升;之后由于盆地内部的不均匀沉降,再次发生抬升,导致ZKCS钻孔记录的海侵较早结束、海侵层埋深较浅;全新世海侵即前人命名的"长乐海进",强度比前一期强,为冰后期全球气候变暖和海面上升共同作用的结果,其次可能还伴随着盆地的下陷.

With the development of urbanisation and the increasing number of modern vehicles, traffic contamination has become an important source of environmental pollution. Most previous studies have focused on using roadside soil or plants to determine the spatial pattern of traffic pollutants along roads and the factors that influence this pattern, whereas few studies have reconstructed pollution histories caused by traffic using suitable methods. In this study, two gravity cores were obtained from Qianhu Lake, which is in the Zhongshan tourist area of Nanjing City and is distant from industrial areas. An accurate chronological framework covering the period from 1994 to 2014 was established using the correlation between the variation in grain size of the sediment cores and the variation in annual rainfall in Nanjing City. Moreover, magnetic and chemical parameters were also measured, and the results demonstrated that concentration-related magnetic parameters exhibited different correlations with different heavy metal concentrations. These correlations were significantly positive for Zn , Pb , and Co ; weakly positive for Ni; absent for Cr; and negative for V. Combined with statistical data on industrial emissions and private cars in Nanjing City since 1994, the observed variations in magnetic susceptibility, anhysteretic remanent magnetisation, saturation isothermal remanent magnetisation, Zn , Pb , and Co , were controlled by traffic activities in the tourist area but not by industry. Therefore, the variations in these parameters record the traffic pollution history of the study area. Combined with the obtained chronological framework, the traffic-related pollution history could be divided into two stages: 1) from 1994 to 2003, when traffic-related pollution became increasingly serious because of the exponential increase in the number of private cars and the prosperity of tourism; 2) from 2003 to 2014, when traffic-related pollution continuously increased but at a much slower rate than in stage 1. This slower rate of increase was probably related to the maximum carrying capacity of the tourist area and technological innovations in automobile manufacturing, as well as improvements in fuels.

城市地铁控制网是为城市地铁工程布设的专用控制网,是城市地铁工程所有测量的基础依据,是城市地铁工程全线线路与结构贯通的保障.城市地铁的建设特点是网状规划、建设周期长、分期建设等.随着新建线路的增加,单地铁线路的控制网越来越多,如何保证已有线路和新线路的衔接,是城市地铁控制网设计和建设时必须考虑的问题.本文以福州市4#、6#及F1线控制网建设为例,通过将已有线路控制网纳入到新线路控制网进行整体平差,有效解决了这一衔接问题,提高了新网与已有网的契合度,使控制网精度更均匀,同时提高了新线路控制网精度.

本文以福州市农村地籍调查确权为基础,通过对福州市农村宅基地现状以及农村地籍调查确权工作与自然资源调查确权工作区别与联系的分析,阐述了农村地籍调查确权是自然资源调查确权的基础这一逻辑关系,并结合晋江市的自然资源确权试点工作,提出了对自然资源确权工作的一些意见和建议.

基坑开挖过程中,不可避免的会对基坑四周的环境产生影响,因此对基坑本身和周围环境的监测显得尤为重要.因为监测数据能够直观准确的反应基坑周边的情况,通过对监测数据进行分析,可以判断建筑的安全状况,本文对福州某一基坑工程的监测数据进行了分析总结,研究了基坑开挖过程中,周边建筑以及管线的情况,并且通过报警值的设置,对工程的安全情况进行了评估,同时给出了实际建议,希望能够对其他基坑工程提供科学合理的借鉴.

运用便携移动测量技术大大缩短了景观改造的工期,能够从行走的路线感受视野,使景观改造更符合城市美感.通过分析便携移动测量技术的特点,以某市新区某道路景观改造项目为例,对便携移动测量技术在景观工程中的具体应用进行了详细阐述.

风成黄土是研究古气候变化的良好载体,在全球陆地分布广泛,而不同区域地理环境差异显著,其记录气候变化的机制亦有所不同.以色列南部黄土区地处亚热带沙漠边缘,为探究该区域黄土磁性特征及其对区域环境的响应机制,对内盖夫沙漠边缘黄土区进行野外考察并测试系统环境磁学及粒度参数.结果表明,Har Keren(HK)剖面中磁性矿物主要为碎屑磁铁矿和磁赤铁矿,磁性矿物含量较少,磁性颗粒主要为粗单畴(SD)和多畴(MD),磁性特征与中国西北干旱区黄土较为相似.HK剖面常温磁学参数整体变化范围较小,仅在剖面亚表层有所升高,可能是受现代成土作用影响.HK剖面中值粒径自底部至顶部呈减小趋势,但粒度整体偏粗,其频率分布曲线显示为正偏态,分选较差,反映出多种搬运方式的混合特征,与典型风成黄土有所差异.

随着当前我国工程行业的快速发展,工程测量作业的复杂性和信息化程度越来越高,而GIS技术是基于地理信息系统融合多学科发展的产物,需要测绘技术研究人员高度重视.在分析工程测量作业中,如何有效地应用GIS技术,更好地保障工程测量质量,成为当前工程测量作业实施中主要面临的问题.论文针对现代GIS技术在工程测量中的应用,进行简要的分析研究,以期能为相关工程测量实施中GIS技术的应用提供参考.

地理信息是一种特殊的信息,具有区域性、多维性和动态性.通过对地理信息的有效分析和利用,有助于更加直观、更加具体地理解某些现象,为人类的生产生活提供便利并提供相关决策支持.以福州大学城为研究区域,以该区域内的师生为目标人群,采集并利用区域内相关地理信息,研究设计高校大学生服务平台,旨在提高大学生生活的质量,拓展大学生社交方式(接触型社交和非接触型社交)的多样性和融合性,增强各高校之间以及学生之间的交流.平台开发之前以电子问卷形式对福州大学城内大学生的相关信息进行调研,并对结果进行相应的分析,最终确定平台的功能主要包括室外导航、室内导航、线上社交、线下社交、轨迹记忆、路径自动更新、路径推荐以及“往事重现”等.开发过程中对相关功能所涉及的技术进行了研究和实验.

全球气候变化是当今学术界共同关注的热点问题,全球变暖将导致冰川消融及海平面上升,引起的海侵过程会给沿海低海拔地区带来严重的灾害.研究地质历史发生的海侵过程,可以为将来可能发生的海侵提供预警和对策.福建沿海地区保留有较完整的晚第四纪海相、陆相及海陆交互相沉积,为海侵研究提供了很好的材料.本研究综述了近几十年来该地区海侵研究的进展,同时也发现前人研究中可能存在的几个明显问题:1)MIS3阶段晚期海侵层是否真实存在？2)由于研究载体及研究方法的局限性,前人重建的海平面升降曲线存在很大的差异;3)缺乏高分辨率多指标多钻孔的古气候重建工作.因此,研究区日后的海侵研究工作将主要集中于:1)交叉利用多种定年手段,并结合模拟结果检验MIS3海侵的真实性;2)重建具有高分辨率可靠年代框架的海平面升降曲线及海侵过程;3)加强古气候研究工作,将海平面变化与古气候研究联系起来.

Integrated adjustment is a strict and orderly method of adjustment.It can reduce the influence of the precise error between two adjacent points belonging to different GPS control network.This paper discusses the advantage and the effect of the application of integrated adjustment in GPS control network by an example that is the first phase and second phase GPS control network in FuZhou University City.

本文收集到盆地内913根钻孔岩芯资料，提取各期次海侵淤泥层层顶、层底埋深、现代地表高程和厚度参数进行相关性分析和ArcGIS反距离权重插值分析的方法，结合盆地内已探明的断裂带分布，拟探讨盆地内部的构造及沉积中心的迁移演化。结果表明福州盆地内全新世和MIS3海侵淤泥层分布存在显著差异，全新世（第一层）海侵淤泥层沉积以来盆地内部未发生差异性构造沉降，MIS3（第二层）海侵淤泥层沉积以来发生了差异性构造沉降。闽江南北存在差异性构造沉降，闽江以北多为沉积中心，导致盆地内各期次海侵层分布存在较大差异。?????