摘要
利用人类影响综合指数HAI和归一化植被指数NDVI分别来量化人类影响格局、植被覆盖分布,两者之间的关系及时间上的动态变化,了解江西省改革开放10年来人类活动对植被覆盖的影响,用一元线性回归模型来衡量两者之间的关系。结果表示:(1)HAI高值多集中在平原区域,低值集中在丘陵区域,而NDVI的低值区大多集中在平原地区,高值区则呈带状沿着山脉分布。对比40年内的空间分布来看,低值区在扩张、增加,赣州市西部、景德镇市北部等区域增加较为明显。(2)HAI增加的最快的市为鹰潭市,吉安市的HAI增加的最小。NDVI的降低幅度略大于HAI的增加幅度大。(3)随着时间的变化,HAI对NDVI的影响更加剧烈,两者的负相关性越来越大。一元线性结果为,在1980年,NDVI=-0.308×HAI+0.896;在2020年,NDVI=-0.442×HAI+0.882。结果可以为江西省后续的产业布局和生态保护提供参考价值,区域植被覆盖提升建议为:缓解持续增加的人类影响,优化土地利用的空间分配;增加植被覆盖面积;执行有差异的政策。
This study uses human active index(HAI)and normalized difference vegetation index(NDVI)to quantify the patterns of human impact and vegetation coverage distribution,as well as the relationship between the two and their temporal changes,to understand the impact of human activities on vegetation coverage in Jiangxi province over the past forty years of reform and opening up.A simple linear regression model is used to measure the relationship between the two.The results indicate that:(1)High values of the comprehensive index of human impact are mostly concentrated in the plain areas,while low values are concentrated in the hilly areas.Low-value areas of NDVI are mainly concentrated in the plain areas,while high-value areas are distributed along the mountain ranges.In comparison to the spatial distribution over the past 40 years,low-value areas are expanding and increasing,particularly in the western part of Ganzhou city and the northern part of Jingdezhen city.(2)The city with the fastest increase in HAI is Yingtan city,while the smallest increase is in Ji'an city.The decrease in NDVI is slightly greater than the increase in HAI.(3)With the passage of time,the impact of HAI on NDVI becomes more severe,and the negative correlation between the two becomes increasingly stronger.The results indicate that in 1980,NDVI=-0.308×HAI+0.896;in 2020,NDVI=-0.442×HAI+0.882.The results can provide reference value for the subsequent industrial layout and ecological protection in Jiangxi province.Suggestions for improving regional vegetation coverage include:alleviating the continuous increase in human impact,optimizing the spatial allocation of land use,increasing vegetation coverage,and implementing differentiated policies.
作者
喻艳菁
吴小红
熊劲枫
熊文亮
谢运生
YU Yanjing;WU Xiaohong;XIONG Jingfeng;XIONG Wenliang;XIE Yunsheng(Nanchang Eco-environmental Monitoring Center,Nanchang 330038,China;Institute of Energy Research,Jiangxi Academy of Sciences,Nanchang 330096,China;Jiangxi Carbon Neutralization Research Center,Nanchang 330096,China)
出处
《能源研究与管理》
2023年第3期18-24,共7页
Energy Research and Management
基金
中国工程院战略研究与咨询重大项目(2023-01JXZD-02)
中科生态文明研究院开放基金项目(JXZK-2020-04)
江西省科学院省级科研基础研究和人才类科研经费项目(2022YJC2010)
江西省科学院省级财政科研项目经费包干制试点示范项目(2022YSBG22016)。
