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Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
Dwidp inovation 1
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Dwidp inovation 1

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Presentation during National Workshop on DRR Innovation and Excellence in Nepal, 6/29/2010

Presentation during National Workshop on DRR Innovation and Excellence in Nepal, 6/29/2010

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Transcript

  • 1. Disaster Risk Reduction Innovation and Excellence. R.P Adhikary, SDE, Department of Water Induced Disaster Prevention
  • 2. Outline of Presentation
    • Background of Country
    • Types of Water Induced Disaster in Nepal
    • Average annual losses by Water Induced Disaster
    • Innovation
  • 3. Background
    • Geological Formation of Nepal
    • The plate Tectonic theory
    • Nepal posses more than 6,000 rivers draining about 225 BMC of water annually
    • High temporal and spatial variation in runoff and rainfall
    • High instantaneous flood due to high intensity rainfall up to 350 mm/day
  • 4. Formation of Himalayas
    • 50 million years ago
    • Plate movement
  • 5. Formation of Himalayas
    • Indian plate collided with Tibetan plate
    • Formation of Mt. Everest
  • 6. Variation of altitude with respect to distance
  • 7.  
  • 8. Types of Water Induced Disaster in Nepal
    • GLOF, Monsoon Flood, Flash Flood
    • Landslide and Debris flow- Fall, Slides, Topples, debris flow
    • Shifting, meandering, widening and braiding, scour bank erosion and under cutting and inundation of lower Terai during monsoon, and siltation along the farm land .
  • 9. List of GLOF events in Nepal Source-ICIMOD Date River Basin Lake Cause of GLOF Losses 450 yrs ago Seti khola Machhaphure Moraine Collapse Pokhara valley covered By 50-60m debris. 23 June1980 Tamor Nagma pokhari Moraine collapse Village destroyed 3 Sept 1988 Dudha koshi Tampokhari Ice avalanche Human lives &Properties.
  • 10. Glacial lake identified as potentially dangerous ICIMOD River basin Glacier number Lake Area-Sq m Potentially dangerous-No Koshi River 1062 25.09 16 Gandaki River 338 12.05 4 Karnali River 907 37.67 0 Mahakali River 16 0.38 0
  • 11. Debris flow 1993 e.g. Debris flow at Phedigaon, Palung
  • 12. Koshi Flood 2008 80 % Flood Flow 20 % Flood Flow
  • 13. Annual Average Flood and Landslide Disaster S.N People Death (no) 300 1 People Injured (no) 67 2 Livestock Loss (no) 2,365 3 Houses Destroyed (no) 6,445 4 Affected Family (no) 21,377 5 Land Affected (ha) 4,148 6 Estimate Loss (Mill. NRs) 626
  • 14. Major Activities of DWIDP
    • Settlement and agricultural land protection
    • Infrastructure Protection
    • Provision of emergency relief materials
    • Trainings
    • Public awareness
    • Information Dissemination
    • Hazard map preparation
    • Research and study
  • 15. Physical Activities of DWIDP
  • 16. DRR Innovation and Excellence
  • 17. DRR Innovation and Excellence
  • 18. NON-STRUCTURAL MITIGATION MEASURES
    • Disaster Preparedness Map (DPM):
    • Basically a Map indicating :
      • Disaster Prone Area
      • Shelter Houses
      • Public Facilities
      • Warning System
      • Evacuation Plan etc.
  • 19. NON-STRUCTURAL MITIGATION MEASURES
    • Disaster Preparedness Map (DPM):
    • One Important Non-structural Mitigation Measure
    • Advantages:
    • Cheap & Simple for Application
    • DPM Workshop provides opportunity to identify Weaknesses and Strengths for Warning System and Evacuation Plan
    • No any Environmental Impact
  • 20. NON-STRUCTURAL MITIGATION MEASURES
    • Preparation of DPM of
    • Dahachowk Sabo Model Site – A Need
    • Heavy Settlement of Ward No. 3,7 and 8 lies –
    • 1) 1.7 km away and 385 m below the Landslide Prone Area
    • 2) Almost vertically below an Active Stone Quarry
  • 21. DAHACHOWK SABO MODEL SITE
    • Some Features of Model Site :
    • About 10 km West of Kathmandu
    • Watershed – 1.5 km2
    • Average Annual Rainfall – 2010 mm
    • (with max. of 300 mm in 24 hours)
    • Southern Steep Slope Aspects
  • 22. Dahachowk Sabo Model Site Way to KTM about 10 km. Thankot
  • 23. DAHACHOWK SABO MODEL SITE
    • Major Problems:
    • Landslides in U/S or Head Scar
    • Soil Erosion all over the Catchments
    • Debris Flow in D/S or Foot Hill
    • Rampant Stone Quarrying
    • Low Level of Awareness
    • Lack of Alternatives for Grazing, Fire wood etc.
  • 24. NON-STRUCTURAL MITIGATION MEASURES
    • Preparation of DPM:
    • For the People by the People
    • DPM Workshop – Detail Discussions
    • Walk Through the Debris Flow Route
    • Steps for Preparation of DPM
    • Highlights of Important steps
  • 25. NON-STRUCTURAL MITIGATION MEASURES
    • Result of DPM Workshop & Walkthrough:
    • Identification of
    • - Disaster Prone Area
    • - Shelter House
    • - Public Facilities
    • - Mechanism of Warning System
    • - Announcement House for Evacuation
  • 26. NON-STRUCTURAL MITIGATION MEASURES
    • Warning System:
    • Installment of Extension Meter devised with Sensor – Alarms Siren !!!
    • Siren connected to Indra Jyoti School and/or Head Teacher (Messenger) with Telephone
    • Messenger pass on Message to Announcer
  • 27. NON-STRUCTURAL MITIGATION MEASURES
    • Evacuation Plan:
    • Evacuation Announcement is followed by Commencement of Evacuation
    • House to House Evacuation is Devised in absence of any Public Shelter House
    • A Detailed Evacuation Plan prepared for ‘WHO’ should move ‘WHERE’ is probably the most scientific and Best Way to Save Life from Disaster !!!
  • 28.  
  • 29. Factors Contributing to Floods in Terai region UNSAFE CONDITIONS ROOT CAUSES DYNAMIC PRESSURES F L O O D
    • Poverty
    • Pop. Growth
    • Slow Economic Development
    • Migration
    • Land Scarcity
    • Inadequate Amenities
    • Settlement in flood prone area
    • Low preparedness / awareness
    • Inadequate flood protection
  • 30. Poverty cycle
  • 31. River bank erosion in West Rapti
  • 32. Innovation and Excellence
  • 33. Bamboo porcupine
    • Sprit and soul of eco hydraulic
    • Use of low cost natural material
    • Labor intensive and lessening unemployment
    • Can provide habitat for water animal and crop
  • 34. Bamboo porcupine
    • River bank erosion is a single problem in Rivers of alluvial plain
    • River bank protection is avoid bank erosion by current attack
    • Structures are expensive, massive non compatible with environment and eco hydraulic
  • 35. Bamboo porcupine
  • 36. Bamboo porcupine
    • According to FAO 75 bamboo genus and 250 species and known as villager wood
    • Bamboo can used more under water
    • Protects river bank from current attack
    • Most suitable condition are Suspended sediments and velocity of current<1.5 m/se
  • 37. Bamboo porcupine Structure Material Economy Durability Cost of construction, Per m run Additional benefit Cement concrete, Gabion Imported Factor for trade deficit Gabion up to 5 yrs chances of rusting 2x Not appreciable Bamboo piles or Porcupine Locally produced Internal resource generation 3 Yrs when exposed to weather change. More than 3 yrs when kept under earth or water x Eco-Hydraulic Environment friendly for aquatic animal and crops, protein food stuff production
  • 38. Bamboo Porcupine
  • 39. Bamboo porcupine
  • 40. Bamboo porcupine Rapti river
  • 41. DWIDP would like to network from all concerned. Thank You

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