logo
    Climatic Controls on the Stable Isotopic Composition of Precipitation in Northeast Asia : applicability to groundwater recharge study
    1
    Citation
    0
    Reference
    20
    Related Paper
    Citation Trend
    The seasonality of groundwater recharge has been shown to be dominated by winter precipitation in many aquifers of the Basin and Range Geologic Province.The Río San Miguel Basin is a rural watershed in Sonora, Mexico located in the southern-most extent of the Basin and Range, where recharge studies are scarce.Major ion chemistry and stable water isotopes are analyzed for groundwater and surface water samples taken up and down the length of the river from May 2006 to October 2012 to determine the sources and timing of groundwater recharge in the basin.Although 60-67% of annual precipitation occurs during summer months due to the North American Monsoon (NAM), stable water isotope data shows that 69% ± 42% of groundwater recharge occurs as a result of winter precipitation.Major ion data indicate that recharge occurs primarily in the upper part of the basin, and groundwater is well-mixed by the time it passes into the lower-most sub-basin.Significant variability in the isotopic composition of storm flows suggest a variety of sources of monsoonal precipitation occur in the basin.
    Seasonality
    Citations (0)