Multidecadal streamflow regimes in the interior western United States: Implications for the vulnerability of water resources
Multidecadal streamflow regimes in the interior western United States: Implications for the vulnerability of water resources
复制标题
美国西部内陆的多年代际水流状况：对水资源脆弱性的影响
DOI：
10.1029/2001gl014278
复制
发表时间：
2002
影响因子：
5.2
通讯作者：
M. Hoerling
中科院分区：
文献类型：
--
作者：
Shaleen Jain;C. Woodhouse;M. Hoerling
在美国西部内陆，对水的需求增加，加上人为和自然水文气候变化的不确定性，增加了评估现有区域水资源系统是否充足的挑战。目前可用的相对较短的仪器流量记录进一步限制了诊断的年代际和较长的时间变化。在这里，我们开发了一个长期的流量变化的角度来看，使用285年的树轮重建中博尔德溪，科罗拉多。重建的径流分析提供了有用的见解，评估脆弱性：（a）更广泛的水文变化的几十年的时间尺度上，没有看到的仪器记录，（B）湿/干制度显示不同的波动在不同的流量阈值，和（c）时间变化的流量概率有不同的“味道”对应的湿和干制度及其空间范围。基于这些结果，我们讨论了与气候相关的区域水资源脆弱性的影响。
In the interior western United States, increased demand for water coupled with the uncertain nature of anthropogenic and natural hydroclimatic variations add challenges to the task of assessing the adequacy of the existing regional water resources systems. Current availability of relatively short instrumental streamflow records further limits the diagnosis of multidecadal and longer time variations. Here we develop a long‐term perspective of streamflow variations using a 285‐year long tree‐ring reconstruction at Middle Boulder Creek, Colorado. Analysis of the reconstructed streamflow provides useful insights for assessing vulnerability: (a) a wider range of hydrologic variations on multidecadal time scales, not seen in the instrumental record, (b) wet/dry regimes show disparate fluctuations across various flow thresholds, and (c) temporal changes in the flow probabilities have varied “flavors” corresponding to wet and dry regimes and their spatial extent. Based on these results, we discuss implications for the climate‐related vulnerability of regional water resources.