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

摘要/Abstract

摘要：

选取广西峰丛洼地的典型区域田东县为研究对象，基于遥感和GIS技术，结合气象站实测资料，应用联合国粮农组织（FAO）推荐的Penman-Monteith法和ArcGIS软件模拟研究区域生态需水的空间分布。利用Landsat 8数据解译出的土地利用数据，对研究区景观格局指数进行提取，分析生态需水与景观格局的相关性。结果表明：田东县年度植被生态需水定额为85.91~339.27 mm；北部和南部山区的植被生态需水定额相对较大，中部、西部和东南部区域的生态需水定额相对较小。植被生态需水定额与景观多样性、景观破碎度呈极显著负相关，相关系数分别为-0.198和-0.186；与景观连通性呈极显著正相关，相关系数为0.221。研究成果可为区域的景观格局优化管理和水资源优化配置提供依据。

关键词: 峰丛洼地, 生态需水, 景观格局, 景观多样性

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

中图分类号:

X143
F205

吴建强, 郭晋川, 谭娟, 吴卫熊, 黄凯, 白杨, 何令祖, 王敏. 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[J]. 生态与农村环境学报, 2017, 33(9): 800-805.

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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