Application of wavelet analysis for monitoring the hydrologic effects of dam operation: Glen Canyon Dam and the Colorado River at Lees Ferry, Arizona
Application of wavelet analysis for monitoring the hydrologic effects of dam operation: Glen Canyon Dam and the Colorado River at Lees Ferry, Arizona
复制标题
DOI：
10.1002/rra.827
复制
发表时间：
2005-06
影响因子：
2.2
通讯作者：
M. White;J. Schmidt;D. Topping
中科院分区：
文献类型：
--
作者：
M. White;J. Schmidt;D. Topping
小波分析是分析大坝建设和运行对河流系统水文效应的有力工具。使用连续记录的瞬时流量从利斯渡口测量站和记录的每日平均流量从上游支流，我们进行了小波分析的科罗拉多河在大峡谷的水文结构。日平均流量的小波功率谱（WPS）提供了坝后消除明显的年度和次年度流量特征的高度压缩和综合图像。连续记录的WPS显示了日发电周期和周发电周期、流量管理的变化以及1996年大坝后试验洪水的影响。通过局部小波谱对WPS进行归一化，揭示了流量尺度和幅度调制的精细结构，为评估水文循环与生态地貌系统之间的关系提供了一种非常有效的工具。我们扩展了我们的分析蛇河的部分，并展示了如何小波分析可以作为一种数据挖掘技术。小波方法是一种特别有前途的工具，可用于评估研究较少的地区的大坝运行，并评估重建所需流量特性的管理尝试。版权所有© 2005年约翰威利父子有限公司。
Wavelet analysis is a powerful tool with which to analyse the hydrologic effects of dam construction and operation on river systems. Using continuous records of instantaneous discharge from the Lees Ferry gauging station and records of daily mean discharge from upstream tributaries, we conducted wavelet analyses of the hydrologic structure of the Colorado River in Grand Canyon. The wavelet power spectrum (WPS) of daily mean discharge provided a highly compressed and integrative picture of the post‐dam elimination of pronounced annual and sub‐annual flow features. The WPS of the continuous record showed the influence of diurnal and weekly power generation cycles, shifts in discharge management, and the 1996 experimental flood in the post‐dam period. Normalization of the WPS by local wavelet spectra revealed the fine structure of modulation in discharge scale and amplitude and provides an extremely efficient tool with which to assess the relationships among hydrologic cycles and ecological and geomorphic systems. We extended our analysis to sections of the Snake River and showed how wavelet analysis can be used as a data mining technique. The wavelet approach is an especially promising tool with which to assess dam operation in less well‐studied regions and to evaluate management attempts to reconstruct desired flow characteristics. Copyright © 2005 John Wiley & Sons, Ltd.