Hillslope-scale probabilistic characterization of soil moisture dynamics and average water balance

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	Hillslope-scale probabilistic characterization of soil moisture dynamics and average water balance
	Pan, XingYao(潘兴瑶) ; Potter, NJ ; Xia, J ; Zhang, L
刊名	HYDROLOGICAL PROCESSES
	2013
卷号	27 期号:10 页码:1464-1474
关键词	probabilistic ecohydrological model variable source area runoff soil moisture dynamics water balance runoff generation
通讯作者	Pan, XingYao(潘兴瑶)
英文摘要	Probabilistic water balance modelling provides a useful framework for investigating the interactions between soil, vegetation, and the atmosphere. It has been used to estimate temporal soil moisture dynamics and ecohydrological responses at a point. This study combines a nonlinear rainfallrunoff theory with probabilistic water balance model to represent varied source area runoff as a function of rainfall depth and a runoff coefficient at hillslope scale. Analytical solutions of the soil-moisture probability density function and average water balance model are then developed. Based on a sensitivity analysis of soil moisture dynamics, we show that when varied source area runoff is incorporated, mean soil moisture is always lower and total runoff higher, compared with the original probabilistic water balance model. The increased runoff from the inclusion of varied source area runoff is mainly because of a reduction in leakage when the index of dryness is less than one and evapotranspiration when the index of dryness is greater than one. Inclusion of varied source area runoff in the model means that the actual evapotranspiration is limited by less available water (i.e. water limit), which is stricter than Budyko's and Milly's water limit. Application of the model to a catchment located in Western Australia showed that the method can predict annual value of actual evapotranspiration and streamflow accurately.
收录类别	SCI
资助信息	Chinese Scholarship Council through the CSIRO-MOE PhD Research Fellowship Program;Public Research Program of Ministry of Water Resources 201101051;Natural Science Foundation of China 40730632/40671035
公开日期	2013-06-25
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/27917]
专题	地理科学与资源研究所_研究生部
推荐引用方式 GB/T 7714	Pan, XingYao,Potter, NJ,Xia, J,et al. Hillslope-scale probabilistic characterization of soil moisture dynamics and average water balance[J]. HYDROLOGICAL PROCESSES,2013,27(10):1464-1474.
APA	Pan, XingYao,Potter, NJ,Xia, J,&Zhang, L.(2013).Hillslope-scale probabilistic characterization of soil moisture dynamics and average water balance.HYDROLOGICAL PROCESSES,27(10),1464-1474.
MLA	Pan, XingYao,et al."Hillslope-scale probabilistic characterization of soil moisture dynamics and average water balance".HYDROLOGICAL PROCESSES 27.10(2013):1464-1474.