HR: 12:05h
AN: H11H-08    [PDF]
TI: An Assessment of VIC-3L Hydrological Model for the Yangtze River Basin -- A Case Study of Baohe Watershed
AU: * Zhou, S
EM: zhousuoquan@hotmail.com
AF: Nanjing Institute of Meteorology, Pukou District, Nanjing, JS 210044 China
AU: Liang, X
EM: liang@ce.berkeley.edu
AF: 2 Department of Civil and Environmental Engineering, University of California, Berkeley, California, 537 Davis Hall, Berkeley, CA 94720-1710 United States
AU: Gong, P
EM: gong@nature.berkeley.edu
AF: 3. Department of Environmental Science, Policy, and Management, University of California, 151 Hilgard Hall, Berkeley, CA 94720-3110 United States
AB: Yangtze is the first longest river in China and the third in the world, with its main channel length of 6,300 km and a drainage area of 1,800,000 km2. The Yangtze river basin includes large urban areas and significant croplands which play important and critical roles in China's economy and the health of the ecological environment. There are many notable projects associated with the Yangtze river basin, such as the Three-Gorge Dam project, and the water transferring project from south to north. Understanding of the natural terrestrial hydrological processes over the Yangtze river basin and the interactions between land surface and atmosphere, and the impact of the Three-gorge Dam project on its ecological environment is critical and challenging. As the first step in our effort of simulating the terrestrial hydrological process for the entire Yangtze river basin, a spatially distributed Three-Layer Variable Infiltration Capacity (VIC-3L) hydrological model is applied to a watershed called Baohe river watershed with a drainage area of 2500 km2 within the Yangtze river basin. Water fluxes of this watershed are simulated using VIC-3L at a spatial resolution of about 1 km. The soil properties and vegetation information from The Landuse and Landover Database of China at 1km Spatial Resolution for the study watershed are based on the spatial distribution patterns of vegetation, land cover, and soil type at 1km spatial resolutions. The meteorological information (i.e., precipitation, wind, air temperature) is obtained from meteorological measurement and is interpolated into each grid cell by Gauss weight method. The VIC-3L model is running on daily time step. A reservoir routing scheme together with river network routing is coupled with the VIC-3L model to simulate the streamflows. Simulation results are tested using daily streamflow measurements from the hydrologic station at the outlet of Baohe basin, Jinagkou in the Shaanxi province, China, from 1992 to 2001. Analyses of the water fluxes for the watershed will be discussed.
DE: 1655 Water cycles (1836)
DE: 1818 Evapotranspiration
DE: 1860 Runoff and streamflow
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: 2003 Fall Meeting