Background
Extended 1-D Kalman filter (EKF) has been
implemented into the catchment model and  was
validated using identical twin experiment in North
America by Jeff Walker
Ensemble Kalman filter (EnKF) has been implemented
into the  catchchment model and was validated using
identical twin experiement in  North America by Rolf
Reichle
Currently we are assimilating the soil moisture data
from SMMR into the the catchement model and
validate the above two data assimilation methods using
in-situ measurements in Eurasia and using the new
catchment definitions