基于遥感生态指数的区域生态质量评价研究

Study on regional ecological quality assessment based on remote sensing ecological index

生态环境的优劣对于区域社会经济的可持续发展具有重要的作用。本文以宁夏为研究区,基于绿度、湿度、热度、干度因子,计算区域遥感生态指数(RSEI),划分生态质量等级,并对RSEI和生态质量的变化情况进行分析。结果表明,2003—2020年宁夏大部分地区生态质量等级为中等及以下,生态质量等级为良好和优的区域较少;宁夏总体生态质量呈现稳定状态,少部分区域生态质量变差,变化频繁的区域分布在银川平原北部和西部地区及卫宁平原北部地区。本研究可以为宁夏的生态环境保护工作提供借鉴和指导。

The quality of the ecological environment plays an important role in regional social and eco‐nomic development.This paper calculates the remote sensing ecological index(RSEI)based on factors such as greenness,humidity,heat,and dryness by taking Ningxia Region as the research area,and clas‐sifies the ecological quality level.Then it analyzes the changes in RSEI and ecological quality.The re‐sults show that the ecological quality level in most areas of Ningxia is moderate or below from 2003 to 2020,and there are few areas with good or excellent ecological quality levels.The overall ecological quality in Ningxia Region shows a stable state,with a few areas experiencing deterioration in ecologi‐cal quality.The frequent changes occurred in the northern and western parts of the Yinchuan Plain and the northern part of the Weining Plain.This study can provide useful reference and guidance for the eco‐logical environment protection in Ningxia Region.