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结合前人的研究成果以及所取降水、渠道水、地下水水样的氢氧同位素组分(18O、D和T)的测定分析,结果表明:1)灌区内地下水氢氧同位素总体特征一致,表明其起源一致,主要接受灌溉水和降雨补给。2)同一气候条件下,地下水中氢氧同位素存在空间变化特征,其在地下水浅埋区域呈现出同位素富集。3)地下水中的氢氧同位素特征存在季节变化特点,其在冬季D富集18O贫化而夏季显现出D贫化18O富集。4)结合氚丰度值以及灌区内主要观测井地下水埋深变化特征表明灌溉水及现代降雨在地下水中所占的比例很小。
According to the results of previous research and the determination of hydrogen and oxygen isotope composition (18O, D and T) of precipitation, channel water and groundwater samples, the results show that: 1) The overall characteristics of groundwater hydrogen and oxygen isotopes are consistent Its origin is the same, mainly receiving irrigation water and rainfall supply. 2) Under the same climatic conditions, the spatial and temporal variations of hydrogen and oxygen isotopes in groundwater are characterized by isotope enrichment in shallow groundwater areas. 3) The characteristics of hydrogen and oxygen isotopes in groundwater are characterized by seasonal variations, which are depleted in 18O in winter and 18O in summer. 4) The combination of tritium abundance and the variation of groundwater depth in the main observation wells in irrigated area shows that the proportion of irrigation water and modern rainfall in groundwater is very small.