As the response characteristics to rainfall infiltration into weathered materials of rocks

hydrological properties have important influences on the initiation of debris flow.In this paper

Xiaojiang basin was taken as the study area to investigate the difference of hydrological properties of weathered materials from different kinds of rocks.19 samples of weathered materials from 9 kinds of rocks with different elevations and 5 samples of debris flow deposition were collected in 5 debris flow valleys in the upper

middle

and lower reaches of Xiaojiang basin.Liquid and plastic limits and permeation experiments were taken to obtain the hydrological characteristics of each sample.Based on the construction of the index system with three indicators of hydrological characteristics

the variation of hydrological characteristics for each indicator were systematically analyzed.Results indicate that for each indicator

there are significant differences in weathered materials.The variation of its hydrological characteristics is significant for different indicators.In addition

for each indicator

there is the good consistency in hydrological characteristics of debris flow deposits in the 5 typical debris flow valleys of Xiaojiang basin.The index system

can reflect the hydrological properties of weathered materials

systematically

objectively

and reasonably.It may be helpful for the susceptibility analysis of debris flow to rocks based on hydrological characteristics of their weathering products.