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Landscape Pattern Change Research Based on Spot Image in the upper Reaches of Hainan Changhuajiang River Watershed

Author: DiDeLi
Tutor: BiHua；YuePing
School: Hainan Normal University,
Course: Ecology
Keywords: The Changhua River upstream basin SPOT images 3S Landscape Landscape Pattern Change
CLC: Q178
Type: Master's thesis
Year: 2008
Downloads: 244
Quote: 2
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Abstract

Landscape Spatial Pattern of landscape ecology research, is one of the hot spots of today's global change research. Landscape pattern and its change is a comprehensive reflection of the natural and man-made variety of factors generated by the interaction of a certain regional ecological environment, landscape patch type, shape, size, quantity and spatial combination of both kinds of interference factors interact results, but also affect the ecological processes of the area. Therefore, the study of the regional landscape pattern reveal its ecological status and its effective means of spatial variability. Landscape evolution of the fundamental purpose is to find the mechanism of natural and human activities on the environment by humans to adjust their own behavior, and optimize the allocation of resources, control of ecological deterioration, and strengthen planning and regulation, to achieve the sustainable development of the regional and global. In the past 10 years, China's political, social, economic has undergone tremendous changes, that change would be deeply imprinted in the land use pattern on top. Hainan the Changhua River upstream basin has a unique geographical and resource advantages, to become one of the most important ecological function areas in Hainan Province, the land use change in the central mountainous area of ??Hainan Province has a typical representative. Study the landscape changes characteristic of this region, not only provide insight into the study the relationship between the watershed landscape architecture and natural, ecological processes and human social activities, can also be used to determine the strength of various human interference led to a change in the landscape of the region and direction of its effectiveness, to the regional sustainable development provides an important scientific basis. 1995 study area of ??natural forests (including natural tree forest and natural bush) area of ??of 102065.6hm to the percentage of total area of ??69.2%, while in 2005, the area fell to 84560.28 hm ~ 2, the percentage of total area dropped to 57.3%, decades of natural forests decreased at an average annual 1750.5 hm 2 speed; and this corresponds to the thermal park and rubber at an average annual 879.0 hm to 2 295.2 hm speed increase. In this study, the Changhua River upper basin as the study area, the system 10 years the Changhua River upstream watershed landscape pattern change characteristics, the reason for the change of landscape pattern. The text is divided into a total of four chapters, the first chapter focuses on a review of research at home and abroad to achieve results and latest developments. According to the current study characteristics and development trend, the idea of ??the research ideas and research framework; second chapter introduces the natural, social and economic profile of the study area. And land use classification as a landscape classification, combined with land use maps, topographic maps and field investigations in support of RS, GIS and GPS technology, application of computer classification and artificial classification of a combination of 1995 and 2005, two SPOT remote sensing image interpretation phase, the establishment of GIS management system the Changhua River upstream watershed landscape pattern change: Chapter Landscape Pattern Analysis the software Fragstats 3.3, to study the characteristics of the study area from 1995 to 2005 landscape pattern change, and a systematic analysis area and structural changes of landscape pattern; concludes with the recommendation of the landscape and environmental management. Through this study, preliminary draw the following conclusions: (1) landscape pattern in 2005 compared with 1995, in 2005 the total number of patches in the landscape of the study area increased, patch shape becomes simple rules, patch type more discrete distribution, reduced connectivity; landscape type area, natural arbores> natural bush natural shrub and grass> Hot Work Garden> rubber plantations> farmland> pulp and paper forest> river> timber> rural settlements> reservoirs and ponds other sites; maximum increase in area is hot for the park, and were relatively large pulp and paper forest and rubber plantations; area of ??the largest decline in natural tree forest, the relatively large decline in the natural shrub and grass. (2) type of landscape elements in 2005 compared with 1995, the 2005 study area (1) natural arbores area to reduce the largest increase in fragmentation, uneven distribution of plaque size, the shape is more complex; the ② natural bush area increases, broken reduce the degree of patch shape more regular, more uniform plaque size; ③ natural shrub and grass area to reduce the degree of fragmentation increases, the shape is more complex; ④ timber area increase, the dominance of the landscape, connectivity enhancements; (5) pulp and paper forest area increased the complexity of the shape of the patch type, centralized distribution, connectivity and connectivity enhancements; ⑥ heat for Park area increased, the distribution is more concentrated; (7) rubber plantation high aggregation, connectivity, patch shape than the rule: (8) of arable land to increase; increase the size of the the ⑨ reservoirs, rivers and ponds, high aggregation; ⑩ urban area increased, the plaques scattered distribution, the shape is more complex; poor rural residential area increased spatial connectivity, plaque distribution more decentralized, more complex shape; other sites plaques scattered distribution, more complex shapes. (3) the Changhua River upstream watershed in the economic development process, the increase in natural and semi-natural landscape fragmentation, natural landscape structure decreased stability, human disturbance, resources and the environment is gradually increasing stress on the landscape, interrupted many ecological processes, resulting in urban cultural landscape and the natural landscape connectivity is poor, resulting in a series of ecological and environmental problems. Therefore, this study Changhua River upstream landscape pattern change as the goal, its landscape pattern change as the focus, and made recommendations for the problem.

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