共查询到19条相似文献，搜索用时 78 毫秒
1.
黄河下游沿岸湿地景观格局变化研究 总被引：1，自引：0，他引：1
在遥感和GIS技术的支持下,结合研究区湿地的区域特点确定沿黄湿地景观分类系统。构建了湿地景观格局变化表征模型,综合利用景观多样性指数、景观破碎化指数、景观要素斑块分布质心空间变化等景观格局指标和斑块数量,斑块面积、斑块平均面积、斑块数量等景观类型指标,比较系统地分析了近七年研究区湿地景观格局的动态变化。结果表明:①研究区湿地的分布面积呈显著下降趋势;②随着人类干扰强度的增加,景观多样性上升;③湿地景观要素中,稻田湿地、滩涂面积在减少,而水库坑塘、黄河面积都在不断增加。 相似文献
2.
景观生态分类与制图浅议 总被引：12，自引：0，他引：12
程维明 《地球信息科学学报》2002,4(2):61-65
本文在查阅分析大量文献和前人研究的基础上 ,对目前景观生态分类和景观制图作了详细的对比分析 ,认为景观分类需要结合实际区域现状 ,采用逐级分类的方法 ;同时利用 ETM遥感影像为数据源 ,以天山北麓为示范区.研制其土地利用土地覆盖变化的景观类型图。 相似文献
3.
黄河三角洲人类干扰活动强度变化及其景观格局响应 总被引：1，自引：0，他引：1
本研究以湿地变化较为剧烈的黄河三角洲为研究对象,基于RS技术和GIS空间分析方法,利用人为干扰度模型,结合区域人工沟渠建设情况,从区域和局地两个尺度直观揭示人类干扰强度时空分异特征,并探究区域景观格局对人类干扰活动的响应,以期为黄河三角洲滨海湿地生态保护与人类活动调控提供决策支持。结果表明：① 1995-2015年现代黄河三角洲区域人为干扰度和人工沟渠密度均明显增加,空间分布呈现从西南部向东部、北部,自内陆向沿海的扩展趋势;② 随着人类活动强度增强,研究区自然湿地面积减少,区域景观多样性和空间异质性增加,景观整体连通性减弱,景观复杂性降低;③ 景观格局对人类干扰强度变化的响应关系呈现出地区和时间差异;人类干扰活动强度相对较低的保护区受人工沟渠建设的影响,也呈现出斑块团聚程度降低、景观多样性增加和景观复杂性降低的变化趋势;④ 人为干扰度指数和人工沟渠密度指标互为补充,互相印证,可以较为全面、客观地反映黄河三角洲地区人类干扰活动强度。 相似文献
4.
结合遥感、地理信息系统、景观生态学和空间分析等理论,分析了新疆地区2000~2015年农业景观格局的时空动态变化特征,测算了农业生态系统服务价值,通过相关分析进一步研究了农业景观格局与生态系统服务价值的关联,为促进区域土地资源合理利用和生态农业发展提供科学依据。结果表明,新疆农业生态系统正朝着多样化、稳定化的方向发展;农业生态系统服务价值显著增长,但区域间的价值差异较大,呈现北疆高南疆低的分布格局;景观面积、斑块数和景观形状对新疆地区农业生态系统服务价值影响较大且均呈现明显正相关关系。 相似文献
5.
中国1∶100万景观生态制图设计 总被引：2，自引：0，他引：2
中国1∶100万景观生态图系借鉴国内外传统景观制图方法和制图规范,在遥感、地理信息系统先进技术的支持下,设计研制其制图方法、制图内容、样图和技术流程,同时提出初步的景观分类系统,为今后编制中国1∶100万景观生态图奠定基础。 相似文献
6.
中国1∶100万景观生态制图设计 总被引：5，自引：0，他引：5
中国1∶100万景观生态图系借鉴国内外传统景观制图方法和制图规范,在遥感、地理信息系统先进技术的支持下,设计研制其制图方法、制图内容、样图和技术流程,同时提出初步的景观分类系统,为今后编制中国1∶100万景观生态图奠定基础。 相似文献
7.
景观指数法作为景观格局分析的重要研究方法和度量手段,也是景观生态学研究的重要组成部分。由于景观指数在空间格局表达时信息高度浓缩,其在应用中普遍地存在"一值多形"问题。文中根据景观水平上聚集度指数和多样性指数对景观空间整体复杂性和异质性的描述,采用二维空间地理现象的四叉树编码表达对四个不同模拟景观格局进行空间划分,形成多层次的四叉树结构,并通过Fragstats软件对不同子区域景观指数计算,以及采用数值矩阵和对应的3D模型来表达不同景观空间格局。该方法明确展现了不同景观格局相对应的空间位置在景观聚集性特征和多样性特征上的不同,并且用同一景观格局中各子区域的景观指数描述自身子区域特征,也从景观空间局部表现了景观空间格局的异质性。研究过程证明了基于四叉树的景观指数分析方法可以区分景观格局在指数计算中的"一值多形"。同时文章展望了该方法对于不同景观空间格局进行聚类划分的应用。 相似文献
8.
景观感知对旅游地规划设计具有基础性作用,但人文旅游地内部的景观感知空间分异至今没有微观尺度上的研究方法出现。本文提出了景观视角分组基础上的景观语义特征点抽象方法,并建立了单文化景观和多文化景观语义感知度计算模型,以解决人文类型旅游地内部景观感知的强度空间分异计算问题。利用数字高程模型,在清西陵旅游地实现了文化景观语义感知度的实证研究:以中国传统的皇家陵寝选址文化及其表征的封建等级体系为语义准则,提取了4个代表性陵墓文化景观不同景观视角下的78个特征点,并赋予不同景观视角及每个特征点相应权重系数;利用视域分析、叠置分析等方法计算得到旅游地景观文化感知度;尝试利用感知度计算结果对现有观光线路进行观景点语义挖掘并设计了优化方案。论文为人文地理学景观感知定量化表达提供了思路,为旅游地规划、景观与线路设计等提供了技术途径。 相似文献
9.
基于GIS的陕北景观结构 总被引：7，自引：1，他引：6
以陕西土地利用现状图作为数据基础,应用Arc/Info和Arc/view等GIS专业软件,对陕北地区的景观进行了分类,并形成了景观分类图。利用景观格局分析软件FRAGSTATS,在斑块类型和景观两个水平上计算了相应的参数和景观指数,定量揭示了整个区域的景观格局与类型特征。为进行深入研究和揭示生态过渡地带生态过程奠定了基础。 相似文献
10.
街道是城市旅游的重要吸引物,探讨街道景观色彩特征对游客情感感知的影响,对城市街道景观合理规划和布局具有重要的参考价值。本研究以西安市主要建成区为案例地,运用全卷积神经网络（FCN）和随机森林（RF）算法,构建街景图像情感感知数据集,基于街景图像利用机器学习对街道景观的色彩特征进行提取,构建色彩量化指标并将其进行空间可视化;最后,运用随机森林回归算法探讨街道景观色彩特征与游客情感感知之间的关系,并得出最佳色彩特征参数。结果表明：(1)游客情感感知具有明显的空间分布格局,美丽和活泼情感由中心区域向外逐渐增加,安全和富有在主城区外二环以内区域得分较高,无聊在该范围内则较低,压抑情感由中心区域向外逐渐降低,游客在非惯常环境中的情感感知与居民在惯常环境中的情感感知在空间分布上具有一定的同质性;(2)街道景观色彩特征与游客情感感知呈现出复杂的非线性关系。色彩复杂度对美丽和活泼的影响小于色彩协调度,对无聊、压抑、安全、富有的影响大于色彩协调度,当色彩复杂度取值为0.86,色彩协调度取值为0.84时,游客在六个维度可以获得较好的情感感知;(3)一般情况下,街道景观色彩特征越显著,越能够带给游客较好的情... 相似文献
11.
赵羿 《中国地理科学(英文版)》1996,(1)
ＬＩＮＥＡＲＳＴＵＤＹＯＮＬＡＮＤＳＣＡＰＥＨＥＴＥＲＯＧＥＮＥＩＴＹＯＦＤＯＮＧＬＩＮＧＤＩＳＴＲＩＣＴＯＦＳＨＥＮＹＡＮＧ赵羿ＬＩＮＥＡＲＳＴＵＤＹＯＮＬＡＮＤＳＣＡＰＥＨＥＴＥＲＯＧＥＮＥＩＴＹＯＦＤＯＮＧＬＩＮＧＤＩＳＴＲＩＣＴＯＦＳＨＥＮＹ... 相似文献
12.
Yi Zhao 《中国地理科学(英文版)》1995,6(1):66-77
Landscape configuration means the distribution and conjunction of landscape element. Inflenced by geomorphological process
and human interference, the landscape configuration of Dongling District of Shenyang City appears 5 types: even distribution,
aggregated distribution, linear distribution, positive interrelation spatial linkage, and negetive interrelation linkage.
We subdivided two lines, which go through the landscape of Dongling District separately, into segments of equal length and
studied the information of the landscape elements, which is distributed on the line, by mathematical theory of communication.
Then we expounded the characteristics of landscape heterogeneity and its changing law in Dongling District as well as the
relationship with geomorphic condition and human disturbance. 相似文献
13.
本文针对物流空间信息Web服务所涉及的服务获取、集成和应用等主要问题,以OGC Web服务框架为基础,将空间信息服务延伸到物流领域,建立了物流空间信息服务集成体系结构和Web服务的集成模式,明确了物流空间信息服务体系的构成要素及其内在关系.在此基础上,扩展和细化了物流空间信息的服务元素,设计了Petri 网的服务组合模... 相似文献
14.
Robert E. Rhoades Virginia Nazarea 《山地科学学报》2006,3(4):334-346
Introduction In tracing the pioneering influences which created the 1980s participatory research movement in international agriculture, health and conserva- tion, the experiences of Latin America must be highlighted. Activist participatory research itselfwas originally inspired by Paulo Freire, the influential Brazilian educator whose pedagogical teachings have been commonplace throughout South America since the 1960s (Freire 1968, Chambers 1994a). Due to a multitude of social forces betwe… 相似文献
15.
The altitudinal pattern of vegetation is usually identified by field surveys,however,these can only provide discrete data on a local mountain.Few studies identifying and analyzing the altitudinal vegetation pattern on a regional scale are available.This study selected central Inner Mongolia as the study area,presented a method for extracting vegetation patterns in altitudinal and horizontal directions.The data included a vegetation map at a 1∶1 000 000 scale and a digital elevation model at a 1∶250 000 scale.The three-dimensional vegetation pattern indicated the distribution probability for each vegetation type and the transition zones between different vegetation landscapes.From low to high elevations,there were five vegetation types in the southern mountain flanks,including the montane steppe,broad-leaved forest,coniferous mixed forest,montane dwarf-scrub and sub-alpine shrub-meadow.Correspondingly,only four vegetation types were found in the northern flanks,except for the montane steppe.This study could provide a general model for understanding the complexity and diversity of mountain environment and landscape. 相似文献
16.
早在20世纪40年代就已经有学者将参与型管理作为一种独立的管理理念进行概括分析,但将其应用到渔业中进行渔业参与型管理的学术性研究尚处于初步探索阶段.我国渔政发展环境为渔业参与型管理奠定了稳固的平台,渔业参与型管理立足于渔民自身利益,能够加强渔民归属感,提升政府工作效率 相似文献
17.
Based on the theories of landscape ecology,landscape eco-environment in the coutrol watershed by reser-voir of Erlong Mountain in Heilogjiang Province was analyzed and assessed by using GIS technique and statistical model of Principal Component Analysis and Spatial Cluster Analysis.It is found that 100.08km^2(36%) of the total area is in the state of kilter,85.73km^2(31%) of the total area is in the state of general,and 47.26km^2(17%) and 15.48km^2(16%) is in the relatively poor state and ideal state.According to landscape ecological structure,there are three land-scape function areas being planned and designed.1) Agricultural landscape function area:its developmental direction is tour agriculture and high-benefit agriculture.2)Eco-environment protected function area:the direction of development and utilization of this region is to develop vigorously forest for soil and water conservation ,and try to increase the rate of vegetation cover.3)Forest landscape function area:rational cut and utilization of forest resources,space optimization disposal of category of forest ,foster of forest and protection of wildwood will become the main development directions for this region.This study trys to provide scientific foundation for ecological restoration of the whole valley and its sustain-able development. 相似文献
18.
Xinxiang Cao 《中国地理科学(英文版)》2008,18(2):146-154
It is very significant for urban development and urban wetland protection and utilization to probe into the process and reasons of urban wetland landscape dynamics. Taking the information of remote sensing and detailed land survey data as the basic information sources, with the help of RS and GIS, according to the principles and methods of landscape ecology, this paper analyzed wetland landscape pattern dynamics and its reasons in Kaifeng City, Henan Province of China, from 1987 to 2002. The results show that the total wetland area in Kaifeng City firstly reduced by 20.1% from 1987 to 1990 and then increased from 1990 to 2002, with an average annual growth rate of 3.3%. At the same time, landscape fragment degree and landscape dominance degree increased, respectively from 0.64 to 0.72 and from 0.3754 to 0.5563, but mean patch area, maximum patch area, patch fractal dimension reduced. As far as single landscape element concerned, fi＇om 1987 to 2002, patch area, patch number, patch density, patch shape and patch location changed in varying degrees in all wetland types in Kaifeng City, among which rice field changed most and others relatively less. In the recent 20 years, rice fields, lake wetlands, puddles and ponds had a higher stability, but river and bottomland wetlands were mostly transformed to land use types. The change of wetland landscape pattern was the result of the combined action of the Huanghe （Yellow） River, urban expansion, wide cultivation of rice, and rapid development of fishery. Among them human activities were the main driving factors for wetland landscape changes. 相似文献