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Article: Ground-water flow analysis in the slope above Shum Wan road, Hong Kong

TitleGround-water flow analysis in the slope above Shum Wan road, Hong Kong
Authors
KeywordsGround Water
Hillslope
Hydrogeology
Landslide
Modflow
Saturated Flow
Slope Stability
Transient Seepage
Issue Date2001
Citation
Environmental And Engineering Geoscience, 2001, v. 7 n. 3, p. 239-250 How to Cite?
AbstractOn August 13, 1995, a slope above Shum Wan Road failed due to high rainfall and caused a 30-m section of Nam Long Shan Road to collapse. The slope consist of weathered tuffs with a clay layer on the surface of the failure. A hydrogeological study was carried out by saturated finite difference grid model, MODFLOW, for the slope at the Shum Wan Road area. From the ground-water model, it was found that the ground-water level reached three meters below the ground surface during failure. The model is sensitive to recharge and specific yield. The presence of the clay layer helped to maintain a high ground-water level. Stability analyses were performed using SLOPE/W. The result of stability analyses showed that the factor of safety, F, decreased due to the rising initial water table. On the 31st of July, the factor of safety was 1.41, and dropped down to 1.01 on the 3rd of August. The factor of safety again rose back to 1.31 on the 8th of August and it finally dropped down to 0.99 on the morning of the 13th of August. The present study showed that the antecedent rainfall had some influence on stability of the slope. The amount of water in the form of seepage, which drained out from the seepage surface from the lower part of the slope, is quantified and found to be 790 m3. Preventive measures can be taken by inserting horizontal pipes in the slope to drain out the ground water in the form of seepage or by covering the slope with shortcrete or chunam.
Persistent Identifierhttp://hdl.handle.net/10722/151064
ISSN
2015 Impact Factor: 0.5
2015 SCImago Journal Rankings: 0.430
References

 

DC FieldValueLanguage
dc.contributor.authorNandy, Sen_US
dc.contributor.authorJiao, JJen_US
dc.date.accessioned2012-06-26T06:16:41Z-
dc.date.available2012-06-26T06:16:41Z-
dc.date.issued2001en_US
dc.identifier.citationEnvironmental And Engineering Geoscience, 2001, v. 7 n. 3, p. 239-250en_US
dc.identifier.issn1078-7275en_US
dc.identifier.urihttp://hdl.handle.net/10722/151064-
dc.description.abstractOn August 13, 1995, a slope above Shum Wan Road failed due to high rainfall and caused a 30-m section of Nam Long Shan Road to collapse. The slope consist of weathered tuffs with a clay layer on the surface of the failure. A hydrogeological study was carried out by saturated finite difference grid model, MODFLOW, for the slope at the Shum Wan Road area. From the ground-water model, it was found that the ground-water level reached three meters below the ground surface during failure. The model is sensitive to recharge and specific yield. The presence of the clay layer helped to maintain a high ground-water level. Stability analyses were performed using SLOPE/W. The result of stability analyses showed that the factor of safety, F, decreased due to the rising initial water table. On the 31st of July, the factor of safety was 1.41, and dropped down to 1.01 on the 3rd of August. The factor of safety again rose back to 1.31 on the 8th of August and it finally dropped down to 0.99 on the morning of the 13th of August. The present study showed that the antecedent rainfall had some influence on stability of the slope. The amount of water in the form of seepage, which drained out from the seepage surface from the lower part of the slope, is quantified and found to be 790 m3. Preventive measures can be taken by inserting horizontal pipes in the slope to drain out the ground water in the form of seepage or by covering the slope with shortcrete or chunam.en_US
dc.languageengen_US
dc.relation.ispartofEnvironmental and Engineering Geoscienceen_US
dc.subjectGround Wateren_US
dc.subjectHillslopeen_US
dc.subjectHydrogeologyen_US
dc.subjectLandslideen_US
dc.subjectModflowen_US
dc.subjectSaturated Flowen_US
dc.subjectSlope Stabilityen_US
dc.subjectTransient Seepageen_US
dc.titleGround-water flow analysis in the slope above Shum Wan road, Hong Kongen_US
dc.typeArticleen_US
dc.identifier.emailJiao, JJ:jjiao@hku.hken_US
dc.identifier.authorityJiao, JJ=rp00712en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0035160248en_US
dc.identifier.hkuros71574-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035160248&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume7en_US
dc.identifier.issue3en_US
dc.identifier.spage239en_US
dc.identifier.epage250en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridNandy, S=36831918300en_US
dc.identifier.scopusauthoridJiao, JJ=7102382963en_US

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