The study describes a model developed to delineate primary recharge contributing areas on a large watershed based on the field-measured parameters. The procedure uses measured values of soil water content, bulk density, hydraulic conductivity, and depth to water at 31 locations, to generate kriged overlays of input in a Geographic Information Systems (GIS) framework. The number of locations was a compromise between sampling efficiency and requirements of the geostatistical analysis. Mathematical operations on the overlays are carried out on a pixel-by-pixel basis to predict distributions of water flux from below the root zone, travel time to the groundwater, and recharge flux pulse at the water table. Comparison with field data suggests that flow may occur through ouly a portion of total pore space. Field application is illustrated on a 123 km² catchment in Pennsylvania.
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Journal of environmental quality
卷
25
期
3
页码
463
- 474
ISSN
0047-2425
出版者
American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
其它主题
Bulk density
语言
英语
注释
Epub
类型
Text; Journal Article
2024-02-28
MODS