The precipitation isotopic content is one kind of national basic environmental data, indispensable for the environmental isotope scientific research, including environmental isotopehydrogeology.
Tritium, as a natural environmental isotope, can be broadly applied in hydrogeology. The application of tritium is greatly limited by the scarcity observations.
氚作为一种天然的环境同位素可广泛应用于水文地质领域，由于实测资料的稀缺，极大地限制了氚的应用。
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The isotope technology can be used in the field of hydrogeology to solve many practical problems which are difficult to solve otherwise.