Filtering of periodic infiltration in a layered vadose zone: 2. applications and a freeware screening tool

Jesse E. Dickinson, Paul A Ferre

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have developed a screening tool to visualize and conceptualize the filtering properties of a layered vadose zone. Climate projections indicate that rainfall timing and magnitude may change and impact groundwater resources. This increases the importance of understanding how the vadose zone filters infiltration variability and ultimately affects recharge and groundwater resources. An approximate solution for the filtering of surface forcings through soil layers was developed previously, and the soil and conditions where its approximations are appropriate was evaluated. Here we present a screening tool based on the solution for estimating how periodic infiltration forcings filter in a layered vadose zone for different soil properties and surface flux conditions. The solutions identify time-varying elements of surface forcings that persist to the depth of the water table, leading to transient recharge. We investigated the filtering properties of the vadose zone in Central Valley, California, and identified areas where surface forcings are essentially damped and recharge can be approximated as steady. We also determined the travel time for infiltration pulses to reach the depth of the water table.

Original languageEnglish (US)
JournalVadose Zone Journal
Volume17
Issue number1
DOIs
StatePublished - Jan 1 2018

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vadose zone
infiltration (hydrology)
infiltration
screening
recharge
groundwater resource
water table
groundwater
Central Valley of California
filter
surface flux
travel
travel time
soil
surface area
soil properties
soil property
soil surface
climate
rain

ASJC Scopus subject areas

  • Soil Science

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Filtering of periodic infiltration in a layered vadose zone : 2. applications and a freeware screening tool. / Dickinson, Jesse E.; Ferre, Paul A.

In: Vadose Zone Journal, Vol. 17, No. 1, 01.01.2018.

Research output: Contribution to journalArticle

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