University of Twente Student Theses


Estimation of terrestrial water storage in the Upper Reach of Yellow River

Haile, Kinfu Habte (2011) Estimation of terrestrial water storage in the Upper Reach of Yellow River.

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Abstract:Terrestrial Water Storage (TWS) in the Upper Reach of Yellow River (URYR) area is an important hydrologic component for the Yellow River. Improved estimation of TWS in the URYR is crucial for water resource management for China. Despite its importance, storage and change of TWS in the area has not been well studied at a larger scale. In this research, TWS and its change (TWSC) is estimated in the URYR during the period of 2003 to 2009. TWS is calculated from two methods: the first method employs the GRACE remote sensing satellite while the second employs estimation by use of GLDAS land surface state variables. TWSC is estimated from the TWS by subtraction of two consecutive monthly values. In addition, TWSC is also estimated from a water balance approach using a combination of river discharge measurements and GLDAS land surface flux variables. The spatial average values of GRACE and GLDAS from 1-degree-by-1-degree spatial resolution is extracted using a watershed mask derived from the DEM of the study area. The TWS result from the GRACE and GLDAS show an increase in TWS of 0.8 cm/year and 0.6 cm/year, respectively due to an increased precipitation of the area. The TWS and TWSC are qualitatively evaluated using hydrological and meteorological data. During the study period, the discharge of Yellow River increased by 13*108 m3/year due to the increased TWS. In addition, the TWS and TWSC indicate a high water storage loss in 2006. This is associated with a low precipitation, a high evaporation and a high discharge from the river. All the results indicate the great potential of GRACE and GLDAS providing hydrological information to water resource management in URYR. Key words: Yellow River, Terrestrial Water Storage, GRACE satellite, GLDAS, Tibetan Plateau
Item Type:Essay (Master)
Faculty:ITC: Faculty of Geo-information Science and Earth Observation
Programme:Geoinformation Science and Earth Observation MSc (75014)
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