Total Streamflow Variation for the Upper Catchment of Bosten Lake Basin in China Inferred from Tree-Ring Width Records

Bosten Lake Basin not only is a major source of drinking water for the residents surrounding area, but also maintains ecological balance region. However, with influence climate change and human activities, level fluctuates sharply has great impact on environment. Therefore, study its historical flow changes as reference become focus research. In this study, radial growth Schrenk spruces (Picea schrenkiana Fisch. et Mey.) significantly correlated tributary streamflow coming from mountainous region near Basin. On basis good coherence, tree-ring chronologies were used to reconstruct Huangshuigou River previous August present July (r = 0.766, p < 0.0001, n 50). The reconstructed series matched observations well, explaining 63.3% variation in observed 1956–2005. Then, sum reconstruction another two tree-ring-based reconstructions (Kaidu Qingshui River) was represent hydrological upper catchment Basin, sequence 306 years. 10.7, 5.5, 2.1 year cycles power spectrum wavelet analysis revealed that runoff hydrometeorology related solar activity. Some dry wet years corresponded record. During years, Indian Ocean probably main precipitation.