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The Research of Coastal Ecosystem Degradation Diagnostic System

Author: LiuZhaoFeng
Tutor: GuoZhongYang
School: East China Normal University
Course: Cartography and Geographic Information Systems
Keywords: Ecological carrying capacity D-PSR-C Fuzzy Clustering Cellular Automata ArcEngine . NET
CLC: Q14
Type: Master's thesis
Year: 2009
Downloads: 299
Quote: 1
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Abstract

The coastal zone is the most active area of ??natural resources and environmental conditions of the most privileged area, has the the paralic characteristics independent environmental system, most closely related to human survival and development. China's coastal zone is of the most densely populated areas, population density, due to the early stage of economic development did not attach importance to the coastal ecosystem conservation and ecological management, leading to the coastal ecosystem there are different degrees of degradation as a result of eutrophication frequency of red tide, the gradual disappearance of coral reefs and mangrove forests, biodiversity sharp decline in the ecological function decline, buffer strips disappearance of the frequent catastrophic events, has brought a huge negative impact on people's production and life, The coastal areas of socio-economic development bottleneck. Chongming Dongtan is located in the eastern end of Chongming Island, a subtropical monsoon climate, abundant rainfall, mild and humid with four distinct seasons. Chongming Dongtan wetland vegetation communities mainly community by Scirpus Scirpus, Phragmites communis and Spartina alterniflora community; birds is rich in resources, waterfowl record $ 13.6; the benthos of macrobenthos 45 kinds, belonging to 5, 7 classes. In this thesis, the ecological carrying capacity of the D-PSR-C (Driving (driving force)-Pressure (pressure)-State (state)-Response (response force)-Control (control force)) model is designed based on a set of indicator-based system Chongming Dongtan ecosystem degradation diagnostic indicator evaluation system, the index system health index as the target layer to evaluate the Chongming Dongtan wetland ecosystem health status and its spatial structure characteristics; 2-level project layer that contains ecological environment system is the driving force (D), pressure (P), state (S), response (R) and control force (C) 5 projects; 3 level indicator layer contains indicators can be measured directly. , The driving force on behalf of the socio-economic conditions and management system, to measure life support living space; pressure of the wetland ecosystem consists mainly of pressure between the pressure of human nature and the nature internal species (ie, the invasion of alien species cause ecological pressure), heavy metal pollution indicators (U2) cover Spartina alterniflora said; wetland ecosystem state indicators major departure from the the inherent ecological conditions of the ecosystem, its composition, structure, and function to make a diagnosis description consists mainly of vegetation cover and landscape diversity index; wetland ecosystem response with the degradation of ecosystems, the response made by the system itself, including the economic output of the number of rare species and wetlands; regulation force indicators including government used to protect thousand yuan GDP, the proportion of investment to environmental protection and restoration of wetlands fiscal spending. Index system was established after the papers according to the data processing flow in 2003 and 2005 raw data processing, the paper describes some of the key data processing steps, such as kriging, vegetation cover to strike a diverse landscape calculations. This paper uses the fuzzy clustering method to classify ecosystem assessment data, divided into first-class type of ecological degradation, the second type of ecological degradation, the third type of ecological degradation, the fourth type of ecological degradation, the fifth class ecological degradation types. And compares the different types of plaque area in 2003 and 2005, and come to a decrease of 0.5% in 2005 compared with 2003, the first class area of ??ecological degradation; 0.7% increase in the area of ??the second type of ecological degradation due to human activities frequently, many first-class type of ecological degradation into second-class type of ecological degradation; 0.2% decrease in the area of ??the third type of ecological degradation; fourth type of ecological degradation area increased by 0.8%; fifth class of ecological degradation The type area decreased by 0.8%. In order to better show the state of the ecosystem of Chongming Dongtan, the paper designed a software based ArcEngine, given described in the paper its overall design, functional design, database design, and program in the core code and run the steps given introduced one by one. Finally, the principle of cellular automata, and the the the Chongming Dongtan ecosystem changes from 2003 to 2005 simulation, the simulation accuracy of 80%.

The Research of Coastal Ecosystem Degradation Diagnostic System

Abstract

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