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A simplified analysis of soil water flow to a mole drain
Author(s) -
SCOTTER D. R.,
HENG L. K.,
HORNE D. J.,
WHITE R. E.
Publication year - 1990
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1990.tb00056.x
Subject(s) - loam , hydraulic conductivity , surface runoff , subsoil , percolation (cognitive psychology) , hydrograph , hydrology (agriculture) , water table , silt , geology , soil science , environmental science , geotechnical engineering , soil water , geomorphology , groundwater , ecology , neuroscience , biology
SUMMARY An analysis is described which allows transient mole‐drain flow, surface runoff and water table depth to be computed, given measured or assumed values for rainfall, evaporation, deep percolation, mole‐drain spacing and depth, surface detention, the drainage coefficient, and the saturated hydraulic conductivity, total porosity and macroporosity of the topsoil and subsoil. Dupuit‐Forchheimer flow below the water table and vertical hydraulic potential equilibrium above the water table are assumed. The analysis was successfully tested by simulating the hydrographs from a mole‐pipe drained silt loam, and comparing the results with the measured hydrographs for three contrasting rainfall events.