Analysis of the River Flow and Sediment Concentration Change before and after Wenchuan Earthquake

Abstract:

Wenchuan earthquake triggered floods, landslide, collapse and secondary geological disaster,trigger a new soil and water loss, having the significant influence to the local river water quality.According to shaba and jiangyou station 2006 January to 2011 December flow and sediment concentration data for statistical analysis, this paper discusses the disaster area river water and sediment changes on the influence of river water quality before and after the earthquake. Results show that,the monthly average flow change trend does not take place obvious change before and after the earthquake,during the earthquake the monthly average sediment concentration is higher than any other in the same period of monthly average sediment concentration,jiangyou station and shaba station the average daily flow rate on May has no obvious change before and after earthquake, the earthquake for different regional influence is different , different regions of different section of the average sediment coefficient has certain space diversity,in jiangyou station the average sediment coefficient before the earthquake is more than the average sediment coefficient after the earthquake but the change of average sediment coefficient in shaba station was not significant before and after the earthquake.

• Periodical: Applied Mechanics and Materials (Volumes 316-317)
• Pages: 236-240
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.316-317.236
• Online since: April 2013
• Authors: Feng Qian, Bo Hu, Jing Jun Liu, Ming Biao Xiong, Heng Hu
• Keywords: Flow, Water Environment, Water Quality, Wenchuan Earthquake

References

[1] HU Bo, XIONG Ming-biao, ZHAO Jiang. Preliminary Analysis of Soil and Water Loss Change before and after Wenchuan Earthquake [J].Journal of Yangtze River Scientific Research Institute,2010:11:0062.

[2] CHANG Xiao-jun, DING Jun, WEI Lun-wu. Distribution of the geological hazards in the upper reaches of the Minjiang River, Sichuan[J].Sedimentary Geology and Tethyan Geology, 2007,27(I):103-108.

[3] Pittet D, Hugommet S, Harbarth S, et al. Effectiveness of a hospital wide programme to improve compliance with hand hygiene[J].Lancet, 2000; 356: 1307.

DOI: 10.1016/s0140-6736(00)02814-2

[4] ZENG Hong-yang, DENG Bin, LI Yong. Influence of Wenchuan Earthquake on Water Resources and Water Environment in the Upper Reaches of the Minjiang River [J].Journal of Sichuan Normal University (Nature Science), 2009:01:0134.

[5] XIA Jun. Regional Water Environment and Ecological Environment Quality Evaluation Association Evaluation Theory and application [M].Wuhan:Wuhan University of hydraulic and electric engineering press,1999.

[6] XU Hui-juan, LI Yu-hong,SUN Yan.On the relationship of the water discharge, sediment concentration and suspended sediment size at Yichang hydrological station of the Yangtze river [J].Resources and Environment in the Yangtze Basin,2006:1:0110:06.

[7] QIAN Ning, Zhang Ren ,Zhou Zhi-de.Riverbed evolution[M].Beijing:Science press,1987.