Spatiotemporal Variations of Hydrologic Extremes and Response to Extreme Precipitation in Xiang River Basin

DOI

10.2991/rac-16.2016.62How to use a DOI?

Keywords

Xiang River basin; extreme streamflow and water level extremes; extreme precipitation; Mann-Kendall test; continuous wavelet transform

Abstract

Trends of streamflow and water level extremes are significant indicators reflecting the risk of floods and droughts. The study on trends of hydrologic extremes can provide references for water resource management and flood risk analysis. Based on Mann-Kendall test, this article detected existing trends in extreme streamflow and water level in the Xiang River basin that are most afflicted by frequent and severe floods. Subsequently, continuous wavelet transform method was employed to identify the consistency of changes in extreme precipitation and streamflow. The results show that no significant trends can be detected in annual discharge extremes in Xiang River basin, but the summer high flows show positive trends in the most area of upper and middle river basin. The results of wavelet transform analysis illustrate that highly similar patterns of signal changes can be seen between extreme precipitation and streamflow in upper and middle section of the basin, while the changes in extreme precipitation for the lower reaches do not always coincide with the extreme streamflow.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Linlin Cheng
AU  - Juan Du
AU  - Yumeng Yang
PY  - 2016/11
DA  - 2016/11
TI  - Spatiotemporal Variations of Hydrologic Extremes and Response to Extreme Precipitation in Xiang River Basin
BT  - Proceedings of the 7th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention
PB  - Atlantis Press
SP  - 387
EP  - 394
SN  - 1951-6851
UR  - https://doi.org/10.2991/rac-16.2016.62
DO  - 10.2991/rac-16.2016.62
ID  - Cheng2016/11
ER  -