广西峰丛洼地区生态需水与景观格局的空间耦合关系分析

doi:10.11934/j.issn.1673-4831.2017.09.005

Abstract

Abstract:

Tiandong County, a region typical of depressions among Karst peaks in Guangxi was selected as the research area. Based on GIS and RS technologies and the observation data of the meteorological stations, spatial distribution of ecological water demand in the study area was plotted and simulated by ArcGIS using the Penman-Monteith method as recommended by the Food and Agriculture Organization of the United Nations (FAO). Landscape pattern indices were extracted from the land use data obtained through interpretation of the Landsat 8 data for analysis of relationship between ecological water demand and landscape pattern. Results show that the annual quota of ecological water demand of the vegetation in Tiandong County varied between 85.91 and 339.27 mm, and it also did spatially, being high in the northern and southern mountainous areas and relatively low in the central, western and southeastern regions. Ecological water demand of vegetation was found to be significantly and negatively related to landscape diversity and fragmentation, with correlation coefficient being -0.198 and -0.186, respectively, while it was significantly and positively to landscape connectivity, with correlation coefficient being 0.221. All the findings in this study may serve as certain basis for optimization and management of regional landscape patterns and allocation of water resources.

Key words: Karst peek-cluster depression area, ecological water demand, landscape pattern, landscape diversity

CLC Number:

X143
F205

WU Jian-qiang, GUO Jin-chuan, TAN Juan, WU Wei-xiong, HUANG Kai, BAI Yang, HE Ling-zu, WANG Min. Spatial Coupling Relationship Between Ecological Water Demand and Landscape Pattern in Depressions Among Karst Peaks in Guangxi.[J]. Journal of Ecology and Rural Environment, 2017, 33(9): 800-805.

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Spatial Coupling Relationship Between Ecological Water Demand and Landscape Pattern in Depressions Among Karst Peaks in Guangxi.

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