Application of SABO Technology to Control Debris Flow and Landslides

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Application of SABO Technology to Control Debris Flow and Landslides: Experience from Mugling-Narayanghat Highway Disaster Nepal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Á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´0XJOLQJ1DUD\DQJKDW:DWHU,QGXFHG'LVDVWHU3UHYHQWLRQ3URMHFW01:,'33 µZKLFKUHFHLYHGJUDQW DVVLVWDQFHIURPWKH*RYHUQPHQWRI-DSDQ 7KHPDLQREMHFWLYHRIWKHSURMHFWLVWRPLWLJDWHDQGSUHYHQWZDWHULQGXFHGGLVDVWHUVDORQJWKH0XJOLQJ 1DUD\DQJKDW+LJKZD\DQGWRVHFXUHWKHVDIHW\RIKLJKZD\WUDIÀF:LWKWKHWHFKQLFDODVVLVWDQFHRIWKH -DSDQ,QWHUQDWLRQDO&RRSHUDWLRQ$JHQF\-,&$ WKH3URMHFWKDVLGHQWLÀHGPDMRUGLVDVWHUVLWHVWZRRI ZKLFKDUHRXWVLGHWKHURDGFRUULGRU2QHRIWKHVHLVWKH5XZD.KRODGHEULVÁRZQHDUWKH0DUVK\DQJGL +\GURSRZHU6WDWLRQLQ7DQDKXQGLVWULFWDQGWKHRWKHULVWKHODQGVOLGHQHDU0DQDNDPDQD7HPSOHLQ *RUNKD GLVWULFW:LWK D GHWDLOHG VXUYH\ DQG LQYHVWLJDWLRQ RI LGHQWLILHG GLVDVWHU VLWHV WKH 3URMHFW KDV IRFXVHGRQ6DERWHFKQRORJ\IRUGHEULVÁRZFRQWURODQGVORSHVWDELOL]DWLRQ$VHULHVRI6DERGDPVFKHFN GDPVDQGULYHUWRHZDOOVDQGJXOO\VWDELOL]DWLRQZRUNVODQGVOLGHSURWHFWLRQZRUNVDQGELRHQJLQHHULQJ ZRUNVDUHWKHPDLQVWUXFWXUDOZRUNVGHVLJQHGWRFRSHZLWKGHEULVIORZDQGVORSHIDLOXUH7KHPDMRU FRXQWHUPHDVXUHZRUNVRIWKLVSURMHFWDUHGHVFULEHGDVIROORZV Sabo dams at Ruwa Khola7RVDIHJXDUGWKH0DUV\DQJGL3RZHU6WDWLRQDQGWKHKLJKZD\EULGJHWZR FRQFUHWH6DERGDPVZHUHFRQVWUXFWHGDW5XZD.KRODDWFKDLQDJHSRLQWVDQG7KHVH6DER GDPVSHUIRUPHGYHU\ZHOOGXULQJWKHPRQVRRQVHDVRQDQGSURWHFWHGWKHSRZHUVWDWLRQDQGWKH3ULWKLYL +LJKZD\EULGJH Sabo dams at Khahare Khola7ZR6DERGDPV ZHUHVXFFHVVIXOO\FRPSOHWHGDW.KDKDUH.KROD DW FKDLQDJH SRLQWV DQG 7KHVH 6DERGDPVIXQFWLRQHGZHOOGXULQJWKHÁRRGVRI

Photo 1: Sabo dam at Ruwa Khola at Ch 0+460

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Photo 2: Sabo dam at Khahare Khola at Ch 0+220

Photo 3: Check dams at Gaighat Khola at Ch 18+490 km

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