Characterizations of the water retention curve of the dry-cold snowpack  

作　　者：CHAO Ning LI Lanhai LIU Yang LIU Dong 

机构地区：[1]Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China [2]Tianshan Snow cover and Avalanche Observation and Research Station of Xinjiang,Xinyuan 835800,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Xinjiang Key Laboratory of Water Cycle and Utilization in Arid Zone,Urumqi 830011,China [5]Research Center for Ecology and Environment of Central Asia,Chinese Academy of Sciences,Urumqi 830011,China

出　　处：《Journal of Mountain Science》2025年第4期1326-1342,共17页山地科学学报(英文)

基　　金：supported by the Open Project of Key Laboratory,Xinjiang Uygur Autonomous Region(No.XJYS0907-2023-23);the National Natural Science Foundation of China(NSFC Grant 42371146,42401167);the Third Xinjiang Scientific Expedition Program(2022xjkk0602);the Youth Innovation Promotion Association,CAS(2022444);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB0720203);The International Partnership Program of the Chinese Academy of Sciences(131965KYSB20210018)。

摘　　要：The water retention curve(WRC)has been widely used to quantify moisture transport characteristics of maritime snowpack.However,there is a notable deficiency in experimental studies focused on the WRC of dry-cold snowpack in continental climate conditions.This study selected dry-cold snowpack samples with five densities to measure the variations in volumetric water content using the pressure plate method.The Van Genuchten(VG)and Brooks-Corey(BC)models were then used to fit the snowpack WRCs,aiming to investigate their applicability to dry-cold snowpack and explore the relationship between the model parameters and snowpack characteristics.The results indicated that:(1)Compared to the particle size and the ratio of snowpack density to particle size,the snowpack density shows a higher correlation with the shape parameters of VG model and BC model;(2)There is a nonlinear relationship between the snowpack density and the shape parameters of VG model and BC model;(3)Both the BC and VG models provide a high level of accuracy in fitting the experimental data,with the BC model showing slightly better precision.However,after regression correction,the VG model outperforms the BC model.The findings provide support for in-depth studies of moisture movement characteristics in different types of snow,and have significantly practical value for improving the accuracy of early warning systems for hazards such as avalanches and floods.

关 键 词：SNOW Dry cold snowpack Water retention curve Van Genuchten model Brooks Corey model 

分 类 号：P343.6[天文地球—水文科学]