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Effects of an organic mat filter on artificial recharge with turbid water
Author(s) -
Schuh W. M.
Publication year - 1991
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/91wr00159
Subject(s) - groundwater recharge , infiltration (hvac) , hydraulic conductivity , environmental science , structural basin , porosity , hydrology (agriculture) , penetration (warfare) , sediment , geology , soil science , geotechnical engineering , materials science , geomorphology , soil water , groundwater , composite material , engineering , aquifer , operations research
Total recharge was 81% larger for a sandy basin with an organic mat filter than for the same basin with a clean, fully renovated surface, but without the mat. Surface impedance was larger for check areas without organic mat, while areas with the mat exhibited impedance increases to greater depths. Experimental results indicated a likely trade‐off between short‐term recharge enhancement and an eventual larger depth of renovation to offset deeper sediment penetration under the mat. A substantial decrease in hydraulic impedance and a corresponding increase in infiltration rate were measured between 90 and 400 hours and indicated that despite large sediment influx, soil hydraulic conductivity was larger under the organic mat than for the same basin positions on clean sands using clean water. The large decrease in impedance is attributed to microbial transformation of O 2 to CO 2 which increased water‐filled large porosity.