基于物元模型的延吉市土地利用总体规划环境影响评价研究

目前在对土地利用规划环境影响评价的方法研究方面有诸多的论述,如何构建适合县域尺度的评价指标体系与方法还不多见。本文旨在通过实例研究,在指标体系及评价方法等方面进行探索性的研究,为建立适用于我国的县域土地利用规划环境影响评价方法提供研究案例。结合延吉市的社会经济及生态条件,根据"压力—响应"模型结构建立评价指标体系,采用层次分析法结合物元分析方法对延吉市土地利用总体规划的环境影响进行评价。评价结果表明,延吉市土地利用总体规划对环境的影响等级为Ⅱ级。耕地转化率、基本农田保护率等单项指标对延吉市产生了中等程度的影响,规划的实施将对延吉市社会生态环境协调发展起到较大促进作用。

GIS-based Study on the Evolution of County-scale Land Use Landscape Pattern —A Case Study of Da'an City, China

With land use landscape pattern of Da'an City in west Jilin Province as an example, internal mechanism of regional land use changes was explored on the basis of GIS and remote sensing interpretation data. County-scale RS images were processed in ENVI, relevant indexes of land use change and landscape ecology selected to analyze quantity structure change, dynamic change and transition matrix of land use, and evolution trends of land use/cover change and landscape pattern in the study area analyzed. The results showed that from 1995 to 2005 Da'an City has witnessed a decreasing mean patch area of farmland, grassland and woodland, aggravating fragmentation of woodland and grassland; declining landscape diversity and increasing dominance degrees of certain landscapes; diversified land use types but lower rationality, increasing areas of certain landscape types.

基于GIS的虎林市土地利用动态变化研究

为了探求区域土地利用变化的内在机制,本文立足于县域尺度,以黑龙江省虎林市为例,在GIS的支持下,以遥感解译数据为基础,选用土地利用动态变化对研究区的土地利用/覆被变化和演化进行研究分析。结果表明虎林市全部土地利用类型总斑块个数增加,斑块密度变大。表明区域覆被物种的种类有所减少,地表植被类型有向个别物种集中化的趋势。