Sains Malaysiana 46(11)(2017): 2179-2186

http://dx.doi.org/10.17576/jsm-2017-4611-19

 

Internal Characteristics of Loose Solid Source of Debris Flow in Zhouqu

(Ciri Dalaman Sumber Pepejal Bebas Aliran Puing di Zhouqu)

 

SHUFANG FAN*

 

1School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China

 

2Monitoring Center of Mine Resources and Geological Environment, Shaoguan 512026, China

 

Received: 23 January 2017/Accepted: 17 May 2017

 

ABSTRACT

In this paper, with debris flow in Zhouqu as the research object, combined with experiments such as cation exchange capacity (CEC), mineral chemical composition and water quality analysis, relation between water and salt in solid source forming debris flow was studied via soil column leaching test and soluble salt analysis, and internal characteristics of debris flow was accordingly showed. It was found that, the soil was loose, and the content of gravel and sand was high, and the content of fine particle was low. The soluble contents at the slope of the accumulation body were described as, collapsed accumulation body > landslide accumulation body, slope toe > slope top, gentle slope > steep slope, also related to length of the slope. The results indicated that accumulations released a large number of base ion after intense weathering, which migrated with water, concentrated and enriched at the slope toe. Saline soil with high salt content collapsed when encountering water and then formed mudflow, thus becoming the internal power to trigger and initiate debris flow to some extent.

 

Keywords: Debris flow; internal feature; salt-water relation; solid source; Zhouqu

 

ABSTRAK

Dalam kajian ini, dengan menggunakan aliran puing di Zhouqu sebagai objek kajian serta uji kaji seperti keupayaan pertukaran kation (CEC), komposisi kimia mineral dan analisis kualiti air, perhubungan antara air dengan garam dalam sumber pepejal aliran puing dikaji melalui ujian larut lesap turus tanah, analisis garam larut dan ciri dalaman aliran puing telah dikemukakan. Didapati bahawa kandungan pelarut garam dalam kecerunan jasad tumpukan telah dinyatakan sebagai, keruntuhan jasad tumpukan > jasad tumpukan gelongsoran tanah > hujung cerun > atas cerun, cerun landai > cerum curam yang juga berkaitan dengan panjang cerum. Keputusan menunjukkan bahawa tumpukan mengeluarkan bilangan ion asas yang besar selepas luluhawa pesat, yang bergerak dengan air, tertumpu dan diperkaya pada hujung cerun. Tanah masin dengan kandungan garam yang tinggi runtuh ketika bertemu air dan kemudian membentuk aliran lumpur hingga ke satu tahap menjadi kuasa dalaman untuk menjadi penyebab dan memulakan aliran puing.

 

Kata kunci: Aliran puing; ciri dalaman; hubungan garam-air; sumber pepejal; Zhouqu

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*Corresponding author; email: fan0931@126.com

 

 

 

 

 

 

 

 

 

 

 

 

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