Contributo del telerilevamento da satellite alla comprensione dei fenomeni idrologici del fiume Congo

project Geoland2. Congo basin is one of the target area where NARMA has to contribute to the development of AMESD/CEMAC services in support to management of water resources focusing on environmental aspects of watersheds. In this contest and to better understand dynamics that occur in the watershed, an analysis has been conducted on the relation between precipitation, river discharge and vegetation dynamics by exploiting available time series of Earth Observation data. Rainfall dynamics has been described using FEWS-NET RFE estimations, river discharge has been monitored using ENVISAT radar altimeter data provided by LEGOS laboratory and vegetation dynamics have been examined through vegetation indices available from long term series of SPOT¿VGT data. The comparison between river discharge measured at Bangui (Central African Republic), gauging station and radar altimeter virtual station data demonstrated that these data can be used to estimate river discharge. Results on Uelè basin showed that a strong positive correlation is obtained between rain data and river discharge only at the end of the vegetation season when plants have reduced water demand for evapotranspiration and less intercept rain. Trend analysis on the considered time windows are provided and the contribution of these finding for river water alert monitoring system is discussed.

BOSCHETTI Mirco;  NUTINI Francesco;  BRIVIO Pietro Alessandro;  BARTHOLOME Etienne;  STROPPIANA Daniela; 

2011-07-08

ASITA

JRC61943

http://www.asita.it,    https://publications.jrc.ec.europa.eu/repository/handle/JRC61943,