PROGRESS IN GEOGRAPHY ›› 2011, Vol. 30 ›› Issue (9): 1081-1087.doi: 10.11820/dlkxjz.2011.09.002

• Original Articles • Previous Articles     Next Articles

Study on Holocene Paleoflood in Malian River Basin

ZHOU Fang, ZHA Xiaochun, HUANG Chunchang, WANG Xiaqing, SANG Jingjing   

  1. College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710062, China
  • Received:2011-01-01 Revised:2011-04-01 Online:2011-09-25 Published:2011-09-25

Abstract: Through investigations in the middle and lower reaches of Malian River, Holocene palaeoflood slackwater deposition profile were identified in Heshui County. Samples of the palaeoflood slackwater deposits were collected, and the grain-size distribution and the quartz grain surface texture were examined. All of these indexes showed that the slackwater deposits were typical in the study area. Stratigraphic correlations showed that the slackwater deposits recorded the largest floods occurred between 4200-4000 a B.P. on the river. The flood peak discharges were estimated to be 16780-17200 m3/s by using the slope-area method. Reconstruction of the peak discharge of the 2003 and 2005 floods with the same method and indicators showed that the palaeoflood reconstruction was reliable. These results are important for hydraulic engineering and flood control along the Malian River.

Key words: flood stage indicator, Holocene, Malian River, palaeoflood, slackwater deposits