[Application of multi-temporal China-Brazil Earth Recourses Satellite-02 data on surveillance of dynamic changes of water body of rivers and Oncomelania snail habitats in Anxiang County].
OBJECTIVE
To study the dynamic changes of the water body of rivers and Oncomelania snail habitats by using multi-temporal China-Brazil Earth Recourses Satellite-02 images taken in Anxiang County so as to establish the correct procedure for selecting images.


METHODS
CBERS-02 images were collected on 20th December 2003, 10th February 2004, 10th April 2004, 19th June 2004, 10th August 2004 and 27th October 2004. Then the water body information from the study areas based on NDWI was extracted and the areas of water body were calculated to determine the images.


RESULTS
The dynamic changes of the water body conformed to the rules of "water in summer and land in winter". Because of the rise of water, the water area in July was the biggest and the water area began to decline from August. The water area in April was the smallest. Then the wet season and the dry season should be June and April.


CONCLUSIONS
The multi-temporal CBERS-02 images could be used to surveillance the dynamic changes of the water area and helpful in choosing the right images of the wet season and dry season.
Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China.
Bao-Dong
BD
Yao
Zeng-Liang
ZL
Wang
Zhi-Jie
ZJ
Zhang
An-Ping
AP
Tian
Shao-Ping
SP
Zhu
Ben-Jiao
BJ
Hu
Feng-Hua
FH
Gao
Qi-Zhi
QZ
Wang
Ping
P
Yi
Qing-Wu
QW
Jiang
D000818:Animals; D017753:Ecosystem; D004777:Environment; D045483:Rivers; D017215:Satellite Communications; D012908:Snails / Q000254:growth & development*