Ecosystem Service Value Evolution and Security Pattern Optimization in Huaihai Economic Zone     

CAO Yuhong  CAO Yuandan  CHEN Zhiyu  YU Dailiang 《资源与生态学报(英文版)》2022,13(6):977-985

The ecological and environmental effects caused by land use change have attracted global attention. Huaihai Economic Zone, as the core of the Huaihe River ecological economic belt, has experienced a reciprocal evolution of land use, ecological security and regional economic development. Based on multi-stage land use data extracted by Google Earth Engine (GEE), the spatio-temporal differentiation characteristics of ecosystem service value (ESV) evolution in Huaihai Economic Zone from 1998 to 2018 were analyzed with the help of ESV assessment and a minimum accumulated resistance model (MCR), and the regional ecological security pattern (ESP) was optimized. The results show that ESV intensity has obvious spatial differentiation, which is higher in northeastern China and lower in southwestern China. The median ESV area accounted for the largest proportion, while the high and low ESV areas accounted for a small proportion. The characteristics of EVS temporal and spatial differentiation show decreasing and increasing grades. From the perspective of development period, the ESV grade changes show a positive trend. In the optimization of the ecological security pattern, 26 important ecological sources, 22 main landscape ecological corridors, and 65 ecological strategic nodes were optimized and identified, and the middle-level ecological security zone accounted for the largest proportion. The main reasons for the changes in the ESV and ESP are closely related to the changes in local natural resources and the changes and adjustments in government protection policies. These research results can provide a reference for inter-provincial territorial space protection and the formulation of a sustainable development strategy.  相似文献   

Digital Analysis of the Water Layout Ecological Wisdom in Traditional Chinese Rural Settlements: A Case Study of Liukeng Village in Jiangxi Province     

LI Zhe  HUANG Si  WANG Han  LI Yan 《资源与生态学报(英文版)》2022,13(3):371-381

During the long-term construction and development process of eliminating water disasters and promoting water conservancy in traditional settlements, a set of mature strategies that have simple ecological wisdom in water layout have been formed by adapting to the natural water environment and utilizing the regional water system. This study conducted a qualitative and quantitative analysis of the water layout strategies and their effects on Liukeng Village from three aspects: deciphering the water systematic pattern, calculating the spatial characteristics and quantifying the water environment, to explore the technical assistance and potential of water layout research in traditional rural settlements. The results indicated that Liukeng has an unambiguously systematic water layout pattern of source diversion, middle drainage and end purification of the water. Through 3D point cloud computing, it was shown that the site selection made accurate use of micro-topography and adopted the strategy of a multi-source water management. It formed an organic water system pattern, which provided sufficient water sources for all kinds of needs of Liukeng Village.The Dragon Lake in Liukeng held 83.0% of the precipitation, and the vegetation area accounted for 34.7% of the total area of Liukeng, which had high surface permeability and good middle drainage effects. Water detection showed that the Dragon Lake provided good water quality and purification. The purposes of this study are to fill the gap in previous non-quantitative research on water layout in traditional rural settlements, excavate the hidden information and value of settlements, and deepen our understanding of the ecological wisdom of the overall planning, layout and construction of water conservancy in traditional rural settlements. This knowledge can assist the win-win situation of water conservancy cultural heritage protection and modern utilization. It also provides useful inspiration and reference for properly dealing with the problems of rain and flooding, realizing the sustainability of water resources, and protecting the ecological environment in the process of the development and construction of village settlements in China.  相似文献   

Quantitative Groundwater Circulation Pattern Construction Based on Isotopic Hydrogeological Theory and Method: A Case Study for Lingwu Area in Northwest China     

WANG Fugang  GENG Xinxin  GAO Zhenkai  JING Jing  CAO Yuqing 《《地质学报》英文版》2013,87(Z1):652-653

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虎头崖铅锌多金属矿床矿体三维空间变化结构及分布规律          下载免费PDF全文

曹芳  毛先成  邹艳红  赵莹  邹品娟  吴泽权 《地质找矿论丛》2013,28(1):41-49

文章利用Vulcan和Datamine三维可视化软件建立了虎头崖铅锌多金属矿床矿体的三维实体模型、块体模型及地层三维实体模型;运用地质统计学方法分析了虎头崖矿区67线以东和117线以西矿体的Pb,Zn品位空间变化结构,得出搜索椭球体,实现了虎头崖铅锌多金属矿床矿体、地层形态和铅锌品位变化形态的空间分布展示;结合三维建模结果和铅锌矿体空间变化结构,总结出矿体空间分布规律,并用三维可视化软件对矿体分布规律进行显示,指导隐伏矿体的预测,寻找有利的找矿部位。  相似文献   

甘肃阳山金矿区黄铁矿的赋存状态与分布特征          下载免费PDF全文

陶宏  吴昊  王根厚  胡玲  陈胜男  王行军  孟献真 《地质找矿论丛》2013,28(1):65-69

甘肃阳山金矿是迄今为止中国发现的最大金矿。已发现的6个矿段均赋存于泥盆系中,矿石中金属矿物主要为黄铁矿和毒砂。黄铁矿有3种类型:微细粒浸染状、半自形颗粒集合体、自形单晶大颗粒;主要分布在千枚岩、花岗闪长岩、石英脉里,具有多期次多类型的特点。根据黄铁矿的特征,金矿化与石英脉体中细粒浸染状的一期黄铁矿有关。黄铁矿为重要的载金矿物之一,自然金(Au)主要以微细粒的形式赋存于黄铁矿晶体的裂隙内以及晶体与晶体的空隙间。黄铁矿赋存状态和分布特征的研究,对矿区进一步找矿具有指导意义。  相似文献   

古风化壳沉积型铝土矿物探异常模式及系列方案①     

樊金生  郭文波  王美丁  王晖 《矿产与地质》2013,(1):52-55

文章从本区地质成矿规律、物性特征等入手,通过对试验结果的对比分析,论述了古风化壳沉积型铝土矿找矿工作中物探方法的可行性和局限性,提出古风化壳沉积型铝土矿物探工作的系列方案和地球物理异常模式。  相似文献   

丝绸之路经济带沿线国家旅游资源与 入境旅游发展空间格局特征与差异     

苏建军  关丽  张毓 《世界地理研究》2021,30(3):509-519

利用旅游资源丰度指数、旅游流质指数、空间一致性系数和二维矩阵等方法,定量比较分析了丝绸之路经济带沿线18个主要国家旅游资源丰度,入境旅游发展质量,以及旅游资源分布与入境旅游发展质量的空间格局特征与差异。研究表明：丝绸之路经济带沿线国家旅游资源数量与质量差异显著,正形成两极分化突出的格局,中西欧国家最优,中亚国家最弱,入境旅游发展质量也呈现出相似的特征。旅游资源资源分布与入境旅游发展质量,呈现较明显的弱协调性,旅游资源集聚具有较明显的国际旅游导向性,两者发生错位的国家超过三分之二。空间一致性表现为显著的区域差异特征,亚洲相对较好,中西欧次之,东欧最弱。为推进沿线国际旅游合作,提出如下建议：坚定“互联互通、平等包容和合作共赢”发展理念,成立国际旅游合作联盟,督促与落实相关战略部署与重点项目;在求同存异基础上,建立共享机制,提高国家间旅游合作一体化水平和协同发展程度;共同打造丝绸之路经济带世界级旅游线路与旅游资源品牌,着力提升国际旅游发展影响力。  相似文献   

高速铁路建设对我国省际可达性空间格局的影响   总被引：4，自引：0，他引：4  

孟德友  陈文峰  陆玉麒 《地域研究与开发》2011,30(4):6-10

以省会城市为网络中的节点,采用加权平均旅行时间指标对我国"四纵四横"高速铁路网及长三角、珠三角和环渤海地区城际客运系统建成前后省际可达性及演变态势进行分析。研究表明,高速铁路建设使东中西地带内、地带间及省区的总体可达性均获得了大幅度提升,可达性中心区的范围沿骨干客运专线向华南、西南和西北地区拓展,圈层状空间格局依然很突出,两极分化趋势在加剧,高速铁路网建设对各地区的空间经济效应还存在很大差异。经过对高速铁路建成前后各省区的地带内、地带间及总体可达性空间格局的对比分析,从客观上论证了高速铁路建设的必要性及加强省际经济联系的重要性。  相似文献   

甘草种子害虫的幼虫空间分布与抽样技术研究   总被引：2，自引：0，他引：2  

杨芳  贺达汉  张大治 《中国沙漠》2008,28(4):712-716

采用5种不同的判断空间分布格局的聚集度指标,并应用幂法则和回归分析法,得出甘草豆象（Bruchidius ptilinoides Faharaeus）的空间分布型为负二项分布,甘草种子小蜂（Bruchophagus gtycelizae Nikolskya）的空间分布型既属于负二项分布也属于核心分布,甘草种子害虫混合种群的空间分布格局为聚集分布,并得出田间幼虫不同密度时的理论抽样数。  相似文献   

气候变化对祁连山北坡农林牧业结构的影响与对策研究   总被引：21，自引：7，他引：14  

邓振镛  王鹤龄  王润元  张宇飞  刘德祥  徐金芳  张谋草 《中国沙漠》2008,28(2):381-187

揭示了气候持续变暖是祁连山北坡现代气候变化的基本特征。1986年是气候发生明显转折的年份,1987—2003年的平均气温比1961—1986年升高0.8℃,≥0℃积温和≥10℃积温增加142℃和131℃,呈线性上升趋势;降水量平均增加7.5 mm,呈曲线缓慢增多趋势。由于气候变暖,使农作物适生种植区和作物种植上限高度不同程度的提高,其中喜热棉花、喜温玉米和喜凉甘蓝型油菜分别提高100 m左右、150 m左右和200 m左右,种植面积迅速扩大,呈直线上升趋势。依据农业气候生态资源垂直分布特征和15种主要作物气候生态适生种植区以及农林牧业结构布局特点,采用气候生态相似原理,将祁连山北坡大体分为5个农林牧业气候生态区,建议性提出各区农林牧业结构的比重以及夏粮、秋粮、经济作物和饲草的种植比例,并阐明了各区未来主要发展方向。  相似文献