The State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China.
Water Res. 2010 May;44(9):2781-92. doi: 10.1016/j.watres.2010.02.013. Epub 2010 Feb 16.
Based on the tree-ring-width analysis, the total precipitation from previous July to current June of the Qilian Mountains from 1634 to 2000 AD and the average runoff from previous September to current June in the middle section of the Heihe River from 1430 to 2007 have been reconstructed. This allowed detailed examination of the hydrologic history of the watershed of the Heihe River in western China. Precipitation, runoff and groundwater level were found to be significantly correlated with each other on the decadal scale. The three curves display quite synchronous trends of natural variation before AD 1940 to present before the onset of man-made disturbances. A remarkable period is AD 1925-1940 when the precipitation is low in the upper section, the runoff decreases in the middle section, and the groundwater level declines in the downstream section. After 1940, the groundwater level shows a lag effect, which may be a result of high water consumption in the middle and downstream sections. All three tree-ring based hydrologic indices commonly display the most significant periodicities around 80 (78-82), 50 (49-58) and 2 year. These cycles correspond to large-scale oscillation found in the climate system and appear mainly related to ocean-atmosphere interaction.
基于树木年轮宽度分析，重建了 1634 年至 2000 年祁连山前 7 月至当年 6 月的总降水量和 1430 年至 2007 年 9 月至当年 6 月黑河中上游的平均径流量。这使得我们可以详细研究中国西部黑河流域的水文历史。研究发现，降水、径流量和地下水位在数十年的时间尺度上存在显著的相关性。在人为干扰发生之前，这三个曲线显示出了相当同步的自然变化趋势，从公元 1940 年以前到现在。公元 1925-1940 年是一个显著的时期，在此期间，上游降水较少，中游径流量减少，下游地下水位下降。1940 年后，地下水位呈现出滞后效应，这可能是中下游地区高耗水的结果。这三个基于树木年轮的水文指标都显示出了约 80（78-82）、50（49-58）和 2 年的最显著周期性。这些周期与气候系统中发现的大规模振荡相对应，主要与海气相互作用有关。
