IMPACTS OF SPATIALLY AND TEMPORALLY VARYING SNOWMELT ON SUBSURFACE FLOW IN A MOUNTAINOUS WATERSHED .2. SUBSURFACE PROCESSES

被引：12

作者：

DENG, Y

FLERCHINGER, GN

COOLEY, KR

机构：

[1] University of Idaho, Northwest Watershed Research Center, Boise, ID, 83712, 800 Park Blvd.

[2] USDA-Agricultural Research Service, Northwest Watershed Research Center, Boise, ID, 83712, 800 Park Blvd.

来源：

HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES | 1994年 / 39卷 / 05期

关键词：

D O I：

10.1080/02626669409492772

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

The impacts of spatial and temporal variations of snowmelt recharge on subsurface flow in a small mountainous watershed were investigated using field measurements and numerical simulations. A two-dimensional, variably saturated flow model (VAM2D) was used to characterize the hillslope aquifer and to delineate subsurface flow mechanisms. Spatially varying snowmelt along a hillslope transect described in the preceding paper were used as input for the subsurface flow analyses. Simulations indicated that the heterogeneous hillslope aquifer provides hydrogeological conditions for confined and unconfined groundwater flow depending on the extent of snowmelt recharge. The spatial and temporal distribution and amount of snowmelt recharge play important roles in determining when flow is governed by confined and unconfined flow. Results showed that the VAM2D model was able to simulate piezometric measurements reasonably using calibrated hydraulic parameters. Sensitivity analyses showed that the flow regime was considerably different when the spatial variation of snowmelt was' not considered.

引用

页码：521 / 533

页数：13

共 14 条

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