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- W2384164891 abstract "Infiltration coefficients from rainfall and specific yield of unsaturated aquifer are two important parameters to define groundwater recharge,which is a key issue in the relevant research on surface water and groundwater interaction.Rainfall and change of groundwater level have been monitored at Zhuhai Campus of Sun Yat-sen University since 2006 at an interval of 30 minutes,and groundwater and rainwater samples been collected monthly and analyzed for major ions.Infiltration coefficients from rainfall of event and monthly average bases and specific yield are calculated using methods of chloride mass balance(CMB) and the change in groundwater level as well.Precipitation was found to be the main source of groundwater recharge in the study area,and the variation of groundwater table is about 0～1.5 m in the wet season(from April to September) higher than that in the dry season(0～ 0.5 m,from October to March).The infiltration coefficients in the wet season is about 1.3～1.6 and 1.3～2.0 times than that in the dry season for the recharge and intermediate zones of the watershed respectively.Linear relationships between variation of groundwater table and rainfall amount were found at three sites,yielding relevant site specific linearity between the infiltration coefficient and specific yield.The averaged infiltration coefficient from rainfall events is calculated to be 4.6% and 7.6% in the dry and wet seasons,close to 5.3% and 7.7% respectively by CMB which is monthly based.Rainfall intensity is another factor affecting the infiltration coefficient,and a positive relationship was obtained with relatively low linear correlation coefficient.The empirical relationships among groundwater depth,recharge and evaporation from the groundwater table(E(h)) were developed in the study area,giving a peak recharge at a groundwater table of approximately 2.3 m depth.Net recharge,defined as the difference between recharge/infiltration and Eh,was estimated to be the highest at a depth of 3.1 m." @default.
- W2384164891 created "2016-06-24" @default.
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- W2384164891 date "2011-01-01" @default.
- W2384164891 modified "2023-09-28" @default.
- W2384164891 title "Observation and analyses of groundwater recharge from rainfall infiltration in a coastal watershed,south China" @default.
- W2384164891 hasPublicationYear "2011" @default.
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