水环境保护区景观生态脆弱性时空特征分析

Analysis on the Temporal and Spatial Features of Landscape Ecological Vulnerability in Water Environmental Protection Area

为了提高水环境保护区景观生态的可持续建设与发展能力,以某水环境保护区为例,对该地区的景观生态脆弱性时空特征展开分析。选择水环境保护区外围缓冲10.0 km的覆盖范围作为此次研究的主要区域,绘制研究区范围与地理位置概况图。采用图像增强、配准、调整等方式,对获取的信息进行预处理,以此完成水环境保护区概况与来源数据的处理,基于景观生态格局,构建一个水环境保护区脆弱性模型。使用ArcGIS10.2处理软件,对获取的遥感数据进行解析,将获取的数据与上述计算公式进行匹配,得到景观生态类型在三期内的占地面积,发现研究地区“城进湖退”问题较为严重。辅助使用景观时空特性分析软件Fragstats4.2,对研究区的景观数据进行分析,得到景观生态类型在三期内的脆弱度指数,并通过水环境保护区景观生态脆弱性驱动机制分析,得到水环境保护区生态系统的持续化建设仍有待加强的结论。

In order to improve the sustainable construction and development of landscape ecology in a water environmental protection area,a water environmental protection area is taken as an example to analyze the temporal and spatial characteristics of landscape ecological fragility in this area.The 10.0 km buffer area of the outer water environment protection area is selected as the main area of this study.An overview map of the area and geographic location of the study area is drawn,and image enhancement,registration,adjustment,etc.are used to preprocess the acquired information.This completes the overview and source data processing of the water environment protection area;builds a vulnerability model of the water environment protection area based on the landscape ecological pattern;uses ArcGIS 10.2 processing software to analyze the acquired remote sensing data,and compare the acquired data with the a bove calculation formula after matching,the area occupied by the landscape ecological type in the three phases was obtained.It was found that the problem of"urban entry and lake retreat"in the study area was more serious;the auxiliary use of the landscape spatiotemporal characteristics analysis software Fragstats4.2,analyzed the landscape data of the study area,and obtained the vulnerability index of the landscape ecological type in the three periods,and through the analysis of the driving mechanism of the landscape ecological vulnerability of the water environment protection area,it is obtained that the sustainable construction of the ecosystem of the water environment protection area still needs to be strengthened.