[海南省疟疾流行与NOAA - AVHRR植被指数关系分析]

[Analysis on the relationship between malaria epidemics and NOAA-AVHRR NDVI in Hainan province].

作者信息

Wen Liang, Xu De-zhong, Wang Shan-qing, Li Cai-xu, Zhang Zhi-ying, Su Yong-qiang

机构信息

Department of Epidemiology, Faculty of Preventive Medicine, Fourth Military Medical University, Xi'an 710032, China.

出版信息

Zhonghua Liu Xing Bing Xue Za Zhi. 2005 Apr;26(4):263-7.

PMID:15941533

Abstract

OBJECTIVE

To explore the relationship between malaria epidemics and NOAA-AVHRR NDVI.

METHODS

Data on malaria were collected in all 19 counties in Hainan province from Feb, 1995 to Jan, 1996. Values regarding normalized difference vegetation index (NDVI)-related indicators including mean and maximum values of NDVI, the area proportion of NDVI values of 145- and 145+, months with NDVI values of 135+, 140+, 145+, 150+ of these counties in this period were all extracted from NOAA-AVHRR images, using ERDAS8.5 software. The coefficients of correlation of malaria incidences and these NDVI-related indicator values were then calculated with SPSS 11.0.

RESULTS

The incidence of malaria showed positive correlations to mean and maximum values of NDVI, the area proportion of NDVI values of 145+ and months with NDVI values of 135+, 140+, 145+, 150+ respectively, but having negative correlation to the area of NDVI values of 145-. The malaria epidemic regions were in accordance with those regions that the NDVI values of 145+ were continuing for 9 months or more.

CONCLUSION

Malaria prevalence was associated with NOAA-AVHRR NDVI value which could be considered to be use for malaria surveillance in Hainan province.

摘要

目的

探讨疟疾流行与美国国家海洋和大气管理局高级甚高分辨率辐射计归一化植被指数（NOAA - AVHRR NDVI）之间的关系。

方法

收集了1995年2月至1996年1月海南省全部19个县的疟疾数据。利用ERDAS8.5软件，从NOAA - AVHRR影像中提取了与归一化植被指数（NDVI）相关指标的值，包括NDVI的均值和最大值、NDVI值为145及以上的面积比例、这些县在此期间NDVI值为135及以上、140及以上、145及以上、150及以上的月份。然后用SPSS 11.0计算疟疾发病率与这些NDVI相关指标值的相关系数。