Matches in SemOpenAlex for { <https://semopenalex.org/work/W2186495917> ?p ?o ?g. }
- W2186495917 abstract "Heterogeneity is well known to exist at different scales; from microscopic scale to macroscopic scale. Incorporation of different types of heterogeneity in deep vadose zones is challenging because of the usual lack of information at such sites. In this paper, we used a characterization of geological and hydraulic properties throughout a 16 m deep, alluvial vadose zone consisting of unconsolidated, alluvial deposits typical for the alluvial fans of the Eastern San Joaquin Valley, California. We also used information gathered through a seven-year long field fertilization experiment to estimate the amount of nitrate stored within the vadose zone at the end of the experiment. Simple mass balance calculations were performed and six conceptually different 2-D and 3-D vadose zone numerical models were implemented using varying degrees of hierarchical details of heterogeneity. All methods resulted in a narrow range of estimated stored nitrate which was found to be approximately four times larger than what was measured in the field. This study raises concern about numerical dispersion encountered in Richards equation under conditions of infiltration where gravity/pressure gradient dominates convective flux." @default.
- W2186495917 created "2016-06-24" @default.
- W2186495917 creator A5071917155 @default.
- W2186495917 creator A5088361476 @default.
- W2186495917 date "2011-01-01" @default.
- W2186495917 modified "2023-09-26" @default.
- W2186495917 title "Nonpoint Source Pollutant Transfer across Deep Vadose Zones - A Multiscale Investigation to Inform Regulatory Monitoring, Assessment, and Decision Making" @default.
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