Application of GIS/GPS for Landslide management A case study of Ramche-9 and Dhaibung-7 of   Rasuwa District Submitted to ...
GIS ( Geo-informatics Science 1.  Geographic Information system(GI S ) 2.  Remote Sensing (R S ) 3.  Global Positioning Sy...
Why GIS/GPS for Locating Landslide in this study <ul><li>These landslides occurs after topographic map 1995 published </li...
Four M’s Measurement Modeling Monitoring Mapping
Background <ul><li>Rehabilitate mountain residence into the safe land permanently  </li></ul><ul><li>The livelihood of the...
Objective of the study <ul><li>The general objective of the study is to know the situation of the landslide events at thes...
Description of the sites
Soci-economic situation   <ul><li>Population of Landslide VDC's / Wards </li></ul>(150) (187) (337) (66) (379) (407) (786)...
Land Use <ul><li>Land use for Dhaibung (Dhobi Khola) and Ramche (Narkang Khola) Landslide  </li></ul>100 815.2 100 501.6 G...
 
 
Methodology and Study Processes   <ul><li>Field Visit for Primary data </li></ul><ul><li>Field data </li></ul><ul><li>Soci...
<ul><li>Landslides </li></ul><ul><li>Debris flow type of landslide is seen in both Dhaibung and Ramche area.  </li></ul><u...
Landslide events Dhaibung <ul><li>Events on: 15th August, 2003 </li></ul><ul><li>Landslides Regions Dhaibung-7(Prangse)  <...
Landslide events Ramche <ul><li>Events on: 15th August, 2003 </li></ul><ul><li>Landslides Regions Ramche-9 </li></ul><ul><...
Dhaibung Landslide
Dhaibung Landslide
Dhaibung Landslide
Dhaibung Landslide
Dhaibung Landslide
Ramche Landslide
Ramche Landslide
Ramche Landslide
Ramche Landslide
Ramche Landslide
Ramche Landslide Area: 43.44 Ha. Dhaibung Landslide Area: 83.67 Ha.
 
 
Slopes 1316.8 100 815.2 100 501.6 Total 92.6 10.6 86.3 1.3 6.3 >80% (V) 99.5 6.4 51.9 9.5 47.6 60-80% (IV) 978.2 76.0 620....
 
 
Proposed Land use 1316.8 100 815.2 100 501.6 Total 2.5 0 0.50 2.5 LS 6.3 0 1.26 6.3 G5 78.2 0 15.59 78.2 G3 86.3 10.59 86....
Recommendation of the Study <ul><ul><ul><ul><li>Networking should be developed among all stakeholders who are taking inter...
Recommendation of the study <ul><ul><ul><ul><li>Enhancing them in IGAs by promoting locally available materials/resources....
Conclusion <ul><li>Landslides are mainly on cultivated areas of 40-60% slope. </li></ul><ul><li>Farming practice should be...
Conclusion Problem  Identification Use of tool (GIS/GPS/RS) Measurement Shape Size Area Mapping Zoning Buffering Critical ...
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Aan with gis in rasuwa

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Aan with gis in rasuwa

  1. 1. Application of GIS/GPS for Landslide management A case study of Ramche-9 and Dhaibung-7 of Rasuwa District Submitted to Emergency and Disaster Management Livelihood and Economic Rights Department Action Aid Nepal BY Binod Dhakal Individual consultant/GIS Specialist
  2. 2. GIS ( Geo-informatics Science 1. Geographic Information system(GI S ) 2. Remote Sensing (R S ) 3. Global Positioning System (GP S ) 3 S Technology
  3. 3. Why GIS/GPS for Locating Landslide in this study <ul><li>These landslides occurs after topographic map 1995 published </li></ul><ul><li>Update the existing topographic map information with present feature </li></ul><ul><li>Easy measurement and plotting of Shape and Size of Landslides </li></ul><ul><li>Easy Calculation of areas and distances </li></ul><ul><li>Buffer zone creation </li></ul><ul><li>Effective rehabilitation </li></ul><ul><li>Monitoring and Modeling </li></ul><ul><li>70% of the information includes some geographical facts in the decision making process </li></ul><ul><li>Ability of assimilate divergent source of data both spatial and non-spatial (attribute data) </li></ul><ul><li>Visualization impact </li></ul><ul><li>Sharing of information </li></ul><ul><li>Analytical capability on a spatial context </li></ul>
  4. 4. Four M’s Measurement Modeling Monitoring Mapping
  5. 5. Background <ul><li>Rehabilitate mountain residence into the safe land permanently </li></ul><ul><li>The livelihood of the mountain people is miserable and sensible condition due to the lack of accessibility </li></ul><ul><li>The coping capacity of affected people could be strengthen </li></ul><ul><li>Study is made in ward No.9 of Ramche VDC and, at Prangse village (Ward No.7) in Dhainbung VDC </li></ul>
  6. 6. Objective of the study <ul><li>The general objective of the study is to know the situation of the landslide events at these two VDCs, particularly, Prangese at Dhaibung and Ramche. The specific objectives of the study are </li></ul><ul><li>Analyze these events in socio-economic and technical perspectives briefly. </li></ul><ul><li>Find out the appropriate interventions in future for the sustainable management of the sites. </li></ul>
  7. 7. Description of the sites
  8. 8. Soci-economic situation <ul><li>Population of Landslide VDC's / Wards </li></ul>(150) (187) (337) (66) (379) (407) (786) (171) 2001 795 932 1727 296 1947 1933 3880 724 1991 1032 1121 2153 397 2469 2475 4944 953 2001 Female Male Tot_pop Hhs Female Male Tot_pop Hhs Year Ramche (Ramche W.N.-9) (growth rate is 2.25%) Dhaibung (Dhibung W.N.-7) (growth rate is 2.45%) VDC/Ward
  9. 9. Land Use <ul><li>Land use for Dhaibung (Dhobi Khola) and Ramche (Narkang Khola) Landslide </li></ul>100 815.2 100 501.6 Grand Total 0 0 0.5 2.5 Landslide 0 0 16.8 84.5 Grass Land 40.8 332.6 11.3 56.4 Shrub Land 24.1 196.3 1.5 7.5 Forest Land 35.1 286.3 69.9 350.7 Cultivated Land % Area (Ha) % Area (Ha) Descriptions Ramche Dhaibung VDC
  10. 12. Methodology and Study Processes <ul><li>Field Visit for Primary data </li></ul><ul><li>Field data </li></ul><ul><li>Social data </li></ul><ul><ul><ul><li>Technical data </li></ul></ul></ul><ul><ul><ul><li>Group discussion </li></ul></ul></ul><ul><li>Secondary data </li></ul><ul><li>Rainfall </li></ul><ul><li>Existing maps and other information </li></ul><ul><li>Use of GPS </li></ul>
  11. 13. <ul><li>Landslides </li></ul><ul><li>Debris flow type of landslide is seen in both Dhaibung and Ramche area. </li></ul><ul><li>Dhaibung Landslide active old and dormant and reactivated slides, landslide of Ramche is reactivated old landslide. </li></ul><ul><li>A both natural and human activity seems to be responsible The human activities which initiates landslides include cultivation in the colluviums of old landslide deposits, extensive grazing and cutting of the slopes for road construction </li></ul><ul><li>Other causes for landslides are favorable dipping of beds (in Dhaibung area) and discontinuity plane (in Ramche area). Apart from Natural features, road cutting, accumulated rainfall and improper cultivation might have caused this landslide. As per the local people, debris flow dammed and latter on swept away the Army Barrack. </li></ul>
  12. 14. Landslide events Dhaibung <ul><li>Events on: 15th August, 2003 </li></ul><ul><li>Landslides Regions Dhaibung-7(Prangse) </li></ul><ul><li>Affected population: 220 </li></ul><ul><li>Death: 5 </li></ul><ul><li>Loss of livestock: 7 goats, 6 buff, 15 hens </li></ul><ul><li>Damaged households (Partly/totally): 45 </li></ul><ul><li>Damaged other infrastructures: Partly damaged primary school, </li></ul><ul><li>Drinking water reservoir tank, 16 irrigation canals </li></ul><ul><li>Loss of Ag. lands ( in Ropani): 642 Ropanies </li></ul><ul><li>Loss of Cereals Crops (in MT): 64-Maize, 129-potato, 29.70-Millete </li></ul><ul><li>1.5 vegetable </li></ul><ul><li>One person is still missing during event . </li></ul><ul><li> </li></ul>
  13. 15. Landslide events Ramche <ul><li>Events on: 15th August, 2003 </li></ul><ul><li>Landslides Regions Ramche-9 </li></ul><ul><li>Affected population: 253 </li></ul><ul><li>Death: 20 security personnel </li></ul><ul><li>Loss of livestock: 2-buff, 2-ox, 1-cow, 5-goats, 9-hens </li></ul><ul><li>Damaged households (Partly/totally): 9 </li></ul><ul><li>Damaged other infrastructures: 3Arms houses with weapons, </li></ul><ul><li>2water mills, collapsed one primary school, one temple, 2-drinking water reservoir tanks . </li></ul><ul><li>Loss of Ag. lands ( in Ropani): 527 Ropanies </li></ul><ul><li>(Loss of lands and crops occupied by three wards (4,5&9) of Ramche) </li></ul><ul><li>Loss of Cereals Crops (in MT): 6.84 paddy, 32 maize, 86.25-Potato14.74 Millete, 1.5-Vegetable </li></ul><ul><li>Both villages are high in Risk during monsoon season (Terman and Langsa ). </li></ul><ul><li> </li></ul>
  14. 16. Dhaibung Landslide
  15. 17. Dhaibung Landslide
  16. 18. Dhaibung Landslide
  17. 19. Dhaibung Landslide
  18. 20. Dhaibung Landslide
  19. 21. Ramche Landslide
  20. 22. Ramche Landslide
  21. 23. Ramche Landslide
  22. 24. Ramche Landslide
  23. 25. Ramche Landslide
  24. 26. Ramche Landslide Area: 43.44 Ha. Dhaibung Landslide Area: 83.67 Ha.
  25. 29. Slopes 1316.8 100 815.2 100 501.6 Total 92.6 10.6 86.3 1.3 6.3 >80% (V) 99.5 6.4 51.9 9.5 47.6 60-80% (IV) 978.2 76.0 620.0 71.4 358.2 40-60% (III) 146.5 7.0 57.0 17.8 89.5 20-40% (II) 0 0 0 0 0 0-20% (I) Total (Area) % Area (Ha.) % Area (Ha.) D+R Ramche (R) Dhaibung (D) Slope categories
  26. 32. Proposed Land use 1316.8 100 815.2 100 501.6 Total 2.5 0 0.50 2.5 LS 6.3 0 1.26 6.3 G5 78.2 0 15.59 78.2 G3 86.3 10.59 86.3 0.00 0 S5 34.5 1.46 11.9 4.51 22.6 S4 258.8 28.14 229.4 5.86 29.4 S3 9.4 0.61 5.0 0.88 4.4 S2 26.2 2.29 18.7 1.50 7.5 F4 130.0 15.95 130.0 0.00 0 F3 47.6 5.84 47.6 0.00 0 F2 38.8 2.61 21.3 3.49 17.5 C4 508.7 31.97 260.6 49.46 248.1 C3 89.5 0.54 4.4 16.97 85.1 C2 Total (Area) % Area (Ha.) % Area (Ha.) D+R Ramche (R) Dhaibung (D) Description
  27. 33. Recommendation of the Study <ul><ul><ul><ul><li>Networking should be developed among all stakeholders who are taking interest in the events. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Form Community based Disaster management Group/watershed users group and makes them strengthen coping capacity through formulation of the program/activities, implementation of the activities, monitoring, particularly, to the program and this part is also used during monsoon period in a watch whether emerging of spring or not and monitor the landslide during monsoon season. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Train local people about the evacuation drill so that local people can evacuate the area during rainy season prior to the occurrence of landslide. Create awareness to the people regarding the landslides and its affects. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>All the cracks seen in the catchment area must be sealed with non-porous/non permeable, locally available clay materials. So that there should not be seepage. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>However or whenever possible at earliest drainage improvement and diversion of drainage for landslided area to safe channels is essentials. </li></ul></ul></ul></ul>
  28. 34. Recommendation of the study <ul><ul><ul><ul><li>Enhancing them in IGAs by promoting locally available materials/resources. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Proper land use plan or integrated watershed management plan has to be prepared. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Bioengineering activities might be a cost effective way to control landslides. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Detail engineering study for drainage management/ landslide stabilization. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Rainfall analysis over the regions. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Use of GIS, GPS and RS for data capturing and analysis for further studies and training on maps and geographical data capturing process needs to forward. </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Further details study on Soil, Geology, and Hydrology, socio-economic analysis through households' survey. </li></ul></ul></ul></ul>
  29. 35. Conclusion <ul><li>Landslides are mainly on cultivated areas of 40-60% slope. </li></ul><ul><li>Farming practice should be changed into On-farm </li></ul><ul><li>conservation like Terrace Improvement with proper </li></ul><ul><li>water management </li></ul><ul><li>Rainwater harvesting pond will reduce the surface </li></ul><ul><li>run-off of monsoon </li></ul><ul><li>Proper management of the land and water for better food </li></ul><ul><li>production is the present needs </li></ul><ul><li>Problem identification for effective measures </li></ul><ul><li>People of the critical area need to be orient themselves </li></ul><ul><li>Study will be the milestone to push –up the concern stakeholders to the right direction. </li></ul>
  30. 36. Conclusion Problem Identification Use of tool (GIS/GPS/RS) Measurement Shape Size Area Mapping Zoning Buffering Critical area selection Application of effective measures
  31. 37. Thank you

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