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Inter-annual variation of streamflow,precipitation and evaporation in a small humid watershed(Chengcun Basin,China)

Chinese Journal of Oceanology and Limnology 2014年第2期32卷 455-468页

作者： Mark AMO-BOATENG 李致家管仪庆 College of Hydrology and Water Resources Hohai University

For sustainable water resource management,it is important to determine the relationship between streamfl ow and other variables that infl uence availability of water ***,many catchments do not have suffi cient data to allow for a more detailed study of these *** faced a similar challenge in the Chengcun Basin(limited historical data: from 1986–1999); and therefore we used a new approach to overcome *** found that,using nonparametric trend methods in conjunction with the climate elasticity analyses and the 2d visualization of hydrologic data,it is possible to assess the relationships between streamfl ow and other hydro-climatic *** the past,streamfl ow trends in the basin were more correlated with precipitation than with potential evapotranspiration(PET).In addition,there is a gradual shift in the hydrological regime of the catchment,which may affect the occurrence of available water resources and activities that depend on *** addition,based on our climate sensitivity analyses,the streamfl ow is dependent and more sensitive to variations in precipitation than to PET(δQ=0.79δP+0.42δE; precipitation elasticity,ε P=1.32; PET elasticity,ε E=-2.10).Therefore pending more detailed studies,the use of our approach will provide a rapid means to assess the variation of water resources(streamfl ow)in a *** the future,we hope to carry out related research in other watersheds and also perform a more detailed studies to improve upon the results of this study.

关键词： trend Mann-Kendall test climate elasticity Sen's slope streamflow 2d visualization hydrologic data

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