HR: 15:45h
AN: H23D-08 [Moved to H33A]    [Abstracts]
TI: On The Recovery of Total Water Storage in Iran Using GRACE Observations
AU: Delaram, A
EM: Amir8453@Gmail.com
AF: Faculty of geodesy and geomatic, K.N.T University of technology, Opposite to Eskan building - Mirdamad cross - Valiasr St., Tehran, 15875-4416, Iran (Islamic Republic of)
AU: * Naeimi, M
EM: naeimi@ife.uni-hannover.de
AF: Institute of Geodesy, University of Hannover, Schneiderberg 50, D - 30167, Hannover, Germany
AU: Nikkhoo, M
EM: mehdi_nikkhoo@yahoo.com
AF: Faculty of geodesy and geomatic, K.N.T University of technology, Opposite to Eskan building - Mirdamad cross - Valiasr St., Tehran, 15875-4416, Iran (Islamic Republic of)
AB: Iran has a dry climate with limited water resources and different parts of which suffer lack of seasonal and annual precipitation. Therefore, management of water resources is indeed, of a challenge in this region. Thanks to successful launch of GRACE mission in March 2002, which has provided us with a set of reliable data source for studying hydrological cycles in the earth fluid envelope up to now. Temporal changes in total water storage in the regional and global scales are the predominant reason of monthly and annual variations of the Earth gravity field which could be observed and detected by GRACE satellites. current hydrological models which are now being constructed using several data set (i.e. soil moisture data, in-situ measurements, raining and snowing record and so on) still seem to need more concentration and improvements. However GRACE data could be regarded as an external evidence to evaluate and modify these models; and even in some regions, as the only available information about the water storage. In this study, in-situ measurements of all existing piezometric wells in Iran have been used. The wells are not distributed homogeneously over the land and are not available every where. The data have been combined with soil moisture and snow cover information provided by GLDAS model in a monthly resolution and finally have been compared with GRACE observations in the period of time from October 2003 to September 2008. Results explicitly reveal an acceptable agreement between two sources of information and most likely it should be possible to fill the gaps in the land where in-situ measurements are not applicable.
DE: 1640 Remote sensing (1855)
DE: 1855 Remote sensing (1640)
SC: Hydrology [H]
MN: 2009 Joint Assembly