In the Modern Yellow River Delta, the runoff of the Yellow River decreased year by year, as a result of increased irrigation in the upper reaches area. The recharge of precipitation infiltration became the main fresh water source of shallow aquifer in the Modern Yellow River Delta. Accurate evaluation of the recharge of precipitation infiltration is the precondition to exploit groundwater rationally. Based on data loggers installed in boreholes of typical topographic areas in the Modern Yellow River Delta, groundwater table depth was read every thirty minutes. Combined with daily rainfall of 2004, the feed coefficients of precipitation infiltration were calculated by Matlab programming and the temporal and spatial varieties were analyzed to make the main factors clear. It is concluded that: 1) groundwater table depth changed mainly within 2 m below surface; 2) the features of rains and penetrability of land surface were the most important aspects decided the value and the temporal and spatial varieties of the feed coefficients of precipitation infiltration that increase with enlarging of groundwater table depth; 3) the annual feed coefficient of precipitation infiltration was 0.186. The groundwater recharge from precipitation is up to 7.4×108 m3 accounted for 3.7% of the runoff of the Yellow River Delta in 2004.
YUAN Rui-qiang, SONG Xian-fang, LIU Guan-qun
. Study on Recharge of Precipitation Infiltration in the Upper Alluvial Plain of the Modern Yellow River Delta[J]. JOURNAL OF NATURAL RESOURCES, 2010
, 25(10)
: 1777
-1785
.
DOI: 10.11849/zrzyxb.2010.10.015
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