Title :
Monitoring African surface water dynamic using medium resolution daily data allows anomalies detection in nearly real time
Author :
D´andrimont, Raphaël ; Pekel, Jean-François ; Defourny, Pierre
Author_Institution :
Earth & Life Inst., Univ. Catholique de Louvain, Louvain-la-Neuve, Belgium
Abstract :
This paper proposes to use a water detection methodology based on a colorimetric approach to develop a near real time system allowing to monitor and to detect anomalies at a fine time resolution and in a systematic way The algorithm was calibrated over Africa using daily reflectance MODIS data from 2003 to 2011. The proposed approach has 3 major outputs updatable in near real time: (1) a permanent water mask (2) a every 10-days surface water map consolidated with time series and (3) an anomalies detection using 10 years of detection reanalysis. Three validation approaches are developed to deal with the large coverage and the high temporal resolution. The methodology is generic and could be applied to other extent and sensors.
Keywords :
data analysis; hydrological techniques; remote sensing; time series; AD 2003 to 2011; African surface water dynamic monitoring; anomaly detection method; calibration method; colorimetric approach; high temporal resolution; permanent water mask analysis; real time system; reflectance MODIS data; remote sensing; time series; water detection methodology; Databases; Monitoring; Real time systems; Spatial resolution; Surface topography; Time series analysis; Water resources; Africa; medium resolution; monitoring; remote sensing; surface water bodies;
Conference_Titel :
Analysis of Multi-temporal Remote Sensing Images (Multi-Temp), 2011 6th International Workshop on the
Conference_Location :
Trento
Print_ISBN :
978-1-4577-1202-9
DOI :
10.1109/Multi-Temp.2011.6005093