摘要
为判定海南岛总体生态地质环境脆弱性与生态适宜性,在对前人研究总结和对海南岛的生态地质环境特征分析的基础上,从生态要素、地质要素、地理要素、人为要素 4 个方面选取了湿润指数、地层岩性、地貌、土地利用、人口密度类型等 12 个主要影响要素,构建了海南岛生态地质环境质量综合评价模型.运用层次分析法(AHP)计算各要素的权重,利用ArcGIS软件对其叠加计算得到综合评价结果,并利用自然间断分级法将结果按优、良、中、差划分为 4 个评价分区.结果表明:海南岛总体的生态地质环境质量较好,同时基于空间相关性分析,各评价分区在区域尺度上存在一定的空间相关性.其中生态地质环境质量优良区占 15%,良好区占 59%,中等区占 22%,较差区占 4%.通过综合评价可以较客观地认识海南岛的生态地质环境质量状况,同时基于此为各个分区制定了与该区域环境承载能力相适应的经济发展模式以及生态地质环境保护措施.可为海南岛的国土空间管控、生态环境保护等方面提供参考.
Abstract
To evaluate the ecological and geological environment vulnerability and suitability of Hainan Island,we analyzed four factors:ecological,geological,geographical,and man-made elements,based on previous studies and the characteristics of the island.Twelve major influencing factors,including wetness index,stratigraphic lithology,landform,land use,and population density type,were selected from four aspects:ecological factors,geological factors,geographical factors,and anthropogenic factors,and a comprehensive evaluation model of ecological geological environment quality in Hainan Island was constructed.The weight of each element was calculated using the analytic hierarchy process,and ArcGIS was used to superimpose the calculations to obtain the results.Based on the natural discontinuity grading method,we divided the results into four evaluation partitions:excellent,good,medium,and poor.The study revealed that the overall ecological and geological environment quality of Hainan Island is good.Each evaluation zone showed a certain spatial correlation on a regional scale.The areas with excellent ecological and geological environmental quality account for 15%,the areas with good quality account for 59%,the areas with medium quality account for 22%,and the areas with poor quality account for 4%.This comprehensive evaluation can help in understanding the ecological and geological environment quality of Hainan Island and enable us to formulate economic development models and environmental protection measures suitable for the environmental carrying capacity of each zone.This study can provide a reference for land and space management as well as ecological environment protection on Hainan Island.
基金项目
海南岛昌化江流域生态修复支持调查项目(ZD20220209)
中国地调局自然资源综合调查指挥中心科技创新基金(KC20220012)
&&(DD20230416)
NETL
NSTL
万方数据