土地利用对生态环境脆弱性的影响评价

Assessment of the impacts of land use on regional ecological environmental vulnerability

土地利用对生态环境脆弱性具有重要影响,该文选择黄河三角洲垦利县典型生态环境脆弱区,从土地利用类型的角度,分析评价土地利用对生态环境脆弱性的影响。研究构建了包括土地利用类型的空间格局、土地利用类型的生态适宜性和土地利用类型的稳定性3方面指标构成的评价指标体系。以遥感手段获取土地利用类型信息,专家打分法进行评价指标量化分级,层次分析法确定其权重,在此基础上,构建了土地利用类型的空间格局指数模型、土地利用类型的稳定性指数模型以及土地利用生态适宜性指数模型,并据此构建了垦利县土地利用的生态环境脆弱性效应综合指数模型。通过评价,得到了垦利县县域整体和乡镇两个尺度上的土地利用类型生态环境脆弱性综合效应值,系统分析了土地利用类型对生态环境脆弱性的影响及其空间分异,并根据评价结果进行了垦利县土地利用的调整分区,提出了各区生态环境建设的措施建议。

Land use has important effects to ecological environmental vulnerability.From the view of land use types,impacts of land use on ecological environmental vulnerability were analyzed and assessed in Kenli County of the Yellow River delta.Assessment index system including landscape structure and pattern,land use ecological applicability and land use stability was established.Remote sensing techniques were adopted to acquire land use information,expert marking method was used for index quantification,and AHP method was adopted for index weight determination.Based on these,the landscape structure and pattern index model,land use ecological applicability index model and land use stability index model were built up,and land use ecological environment vulnerability effect index model was established accordingly.Through assessment,land use ecological environment vulnerability effect index values in two scales of the whole county and town were gotten.Land use impacts on ecological environmental vulnerability and their spatial distribution were system analyzed.Based on the results,partitions of land use adjustment in Kenli County were proposed,and countermeasures of ecological construction in different areas were brought forward.