QQ客服 官方微博 反馈留言

	Long-term water budget estimation with the modified distributed model - LISFLOOD-WB over the Lushi basin, China
	Mo X. ; Beven K. J. ; Liu S. ; Leslie L. M. ; De Roo A. P. J.
	2005
关键词	flux predictions energy-balance satellite data heat-flux surface parameterization soil impact evaporation equation
英文摘要	In a modification of the distributed hydrological model, LISFLOOD-WB, a two-source canopy scheme is used to predict both the canopy transpiration and soil evaporation. A revised soil storage capacity curve from the Xinanjiang model is applied to take into account the sub-grid heterogeneity. The modified model is used to estimate the long-term (1980-1997) water budget of the Lushi basin (4423 m(2)), China. All the input data fields are integrated in a four-dimensional GIS data structure with a raster grid spacing of 1-km. The basin channel network is determined from digital elevation data, and the spatial pattern of canopy leaf area index (LAI) is retrieved from NOAA/AVHRR NDVI images. Generally, the model efficiency for discharge prediction is acceptable, but the discharges are overestimated in the driest years and underestimated in the wettest years. The results indicated that the influence of inter-annual variation of spatial patterns of LAI detected by NOAA/AVHRR NDVI on the estimates of annual evapotranspiration is negligible. Annually averaged ratios of overland flow, infiltration and canopy interception to precipitation are 24 +/- 7%, 56 +/- 10% and 20 +/- 2%, respectively. The inter-annual variations of precipitation and predicted evapotranspiration are relatively high with standard deviations of 5.1 mm day(-1) and 2.4 mm day(-1), respectively, whereas the inter-annual variation of the net radiation is much less. Monthly temporal patterns of soil moisture follow precipitation strongly. Spatially precipitation and LAI are both significantly correlated with evapotranspiration, although precipitation has a slightly more dominant control. The linear relationship between water yield and LAI is weak on a grid by grid basis.
出处	Meteorology and Atmospheric Physics
卷	90
期	1-2
页	1-16
收录类别	SCI
语种	英语
ISSN号	0177-7971
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23268]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Mo X.,Beven K. J.,Liu S.,et al. Long-term water budget estimation with the modified distributed model - LISFLOOD-WB over the Lushi basin, China. 2005.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。