Maximization of water storage in backfilled and lined

Channels and dimples subject to evaporation and leakage

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A channel or axisymmetric dimple filled with a coarse porous material and aimed at a temporary storage of infiltrated water as a perched water table aquifer is studied. The bottom shape is varied based on the criterion of maximal water storage after a certain period of drainage and evaporation. Leakage into the vadose zone through a thin liner occurs with a specific discharge proportional to the pressure drop across the liner. Evaporation through a horizontal shrinking water table is spatially uniform. An ordinary differential equation, which follows from the mass balance condition, is solved either explicitly or numerically. The class of triangular, polynomial, and conical sections is studied. The shape of maximal water retention is calculated for a given initial stored water volume or water table width, evaporation intensity, liner thickness and conductivity, vadose zone pressure beneath the liner, and selected time interval between two sequential infiltration events.

Original languageEnglish
Pages (from-to)101-106
Number of pages6
JournalJournal of Irrigation and Drainage Engineering
Volume134
Issue number1
DOIs
Publication statusPublished - Jan 2008

Fingerprint

Groundwater
liner
water storage
leakage
evaporation
Evaporation
water table
Water
vadose zone
water
perched water table
Pressure
water retention
pressure drop
aquifers
infiltration (hydrology)
Drainage
mass balance
drainage
infiltration

Keywords

  • Drainage
  • Evaporation
  • Infiltration
  • Leakage
  • Seepage
  • Surface water
  • Water storage

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Water Science and Technology
  • Civil and Structural Engineering

Cite this

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abstract = "A channel or axisymmetric dimple filled with a coarse porous material and aimed at a temporary storage of infiltrated water as a perched water table aquifer is studied. The bottom shape is varied based on the criterion of maximal water storage after a certain period of drainage and evaporation. Leakage into the vadose zone through a thin liner occurs with a specific discharge proportional to the pressure drop across the liner. Evaporation through a horizontal shrinking water table is spatially uniform. An ordinary differential equation, which follows from the mass balance condition, is solved either explicitly or numerically. The class of triangular, polynomial, and conical sections is studied. The shape of maximal water retention is calculated for a given initial stored water volume or water table width, evaporation intensity, liner thickness and conductivity, vadose zone pressure beneath the liner, and selected time interval between two sequential infiltration events.",
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