MODIS遥感图像在江宁县江滩钉螺分布研究中的应用  

Study on the relationship between Terra-MODIS image and the snail distribution in marshland of Jiangning county,Jiangsu province

作　　者：张波[1] 张治英[1] 徐德忠[1] 孙志东[1] 周晓农[2] 龚自立 刘士军 刘诚[4] 许斌[5] 周云[6] 

机构地区：[1]第四军医大学预防医学系流行病学教研室,西安710032 [2]中国疾病预防控制中心寄生虫病预防控制所 [3]南京军区卫生防疫队 [4]中国气象局国家卫星气象中心遥感监测服务处 [5]解放军总参谋部测绘技术总站 [6]江苏省江宁县血吸虫病防治站

出　　处：《中华流行病学杂志》2003年第4期257-260,共4页Chinese Journal of Epidemiology

基　　金：全军"十五"指令性课题资助项目 ( 0 1L0 78)

摘　　要：目的　分析MODIS遥感卫星图像中植被指数 (NDVI)与江宁县江滩各钉螺孳生地钉螺分布之间的关系 ,探索Terra MODIS遥感卫星图像在小范围江滩钉螺孳生地监测中的应用可能。方法　利用现场测量的江宁县 2 0 0 1年度各钉螺孳生地经纬度在ArcView 8.1软件上制作钉螺分布Vector图层 ;利用ERDAS 8.5软件空间模板板块中图层间信息添加功能 ,通过 2 0 0 1年度钉螺分布Vector图层从MODIS卫星图像中提取各钉螺孳生地NDVI。以相关性分析及多元逐步回归分析研究NDVI与钉螺分布间的关系。结果　江滩钉螺孳生地的螺密度与 4月下旬各钉螺孳生地平均NDVI(N2mean)、5月中旬各钉螺孳生地最大NDVI(N2 0max)呈正相关 (r分别为 0 .51、0 .50 ,P <0 .0 5) ;同时活螺框出现率与 4月下旬各钉螺孳生地平均NDVI(N2mean)呈正相关 (r=0 .51 ,P <0 .0 5)。进一步作回归分析结果显示 :江滩钉螺孳生地钉螺密度与 5月中旬各钉螺孳生地最大NDVI(N2 0max)存在 :Y1 =0 .0 0 947×N2 0max(P <0 .0 1 ,R2 =0 .73) ;活螺框出现率与 4月下旬各钉螺孳生地平均NDVI值(N2mean) ,存在 :Y2 =0 .0 1 86×N2mean(P <0 .0 1 ,R2 =0 .90 6)。结论　通过研究显示MODIS卫星图像较好地反映了江宁县江滩钉螺孳生地的植被分布状况 。Objective To analyze the relationship between the normalized difference vegetation index (NDVI) and the snail distribution in marshland of Jiangning county in Jiangsu province, and to explore the utility of Terra MODIS image map in the small scale snail habitats surveillance. Methods NDVI were extracted from MODIS image by vector chart of the snail distribution using ArcView 8.1 and ERDAS 8.5 software. The relationship between NDVI and the snail distribution were Investigated using Bivariate correlations and stepwise linear regression. Results The snail density on marshland was positively correlated with the mean NDVI in the first ten day of May and the maximum NDVI (N 20max ) in the last ten day of May. Incidence of pixel with the live snail on marshland was positively correlated with the mean NDVI (N 2mean ) in the first ten day of May. An equation Y 1= 0.009 47 ×N 20max ( R 2 = 0.73 ), Y 2= 0.018 6× N 2mean ( R 2 = 0.906 ) was established. Conclusion This study showed that the Terra MODIS satellite images reflecting the status of the vegetation on marshland in Jiangning county could be applied to the study to supervise the snail habitat. The results suggested that MODIS images could be used to survey the small scale snail habitats on marshland.

关 键 词：血吸虫病 钉螺 遥感 植被指数 监测 

分 类 号：R181.3[医药卫生—流行病学]