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The instrument-based hydrometric data from most rivers in China and in the world are only 50–60years and there is an urgent need for reconstruction of river flow using various proxy data. We have found that the stalagmite oxygen isotope δ18O record can be used for this purpose. Zhang et al. (2008) established a 1800-year high-resolution cave δ18O record from the Wanxiang Cave located in the drainage...
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