<ul><li>Climate Change Adaptation of  </li></ul><ul><li>Road Drainage </li></ul><ul><li>By Zahra Kalantari </li></ul>
<ul><li>The PhD project </li></ul><ul><li>“ Climate Change Adaptation of Road Drainage” </li></ul><ul><li>Funded by The Sw...
<ul><li>Motivations </li></ul><ul><li>Road disruption </li></ul><ul><li>Aims </li></ul><ul><li>Methodology </li></ul><ul><...
 
Motivations <ul><li>The climate change will lead to an increase in  </li></ul><ul><ul><ul><li>The frequency of extreme pre...
Road disruptions <ul><li>Damages on the roads due to climate change including more frequent floods </li></ul>
Aims <ul><li>Analyse how climate change directly or indirectly affects road dewatering and drainage facilities in Sweden <...
Aims <ul><li>Identify future problems considering the climate change including more frequent flood </li></ul><ul><li>Study...
Methodology <ul><li>International state-of-the-art review </li></ul><ul><li>Questionnaires </li></ul>
Common causes of road damages   <ul><li>Water, the major cause of road damages </li></ul><ul><li>Reduced bearing capacity ...
<ul><li>The insufficient maintenance in form of ditch cleaning and edging </li></ul>
<ul><li>Lack of planning </li></ul><ul><li>Lack of knowledge </li></ul><ul><li>Standing water due to improper construction...
<ul><li>Limitation in ditch cleaning due to el-/tel cables </li></ul><ul><li>Intervals of culvert inspection and clearance...
<ul><li>Frost heave movements and  deformation of the ground surface </li></ul><ul><li>In cold climates the risk of frost ...
Events require the greatest efforts for maintenance of road drainage system   Scores
Impact of adjacent environment on road infrastructure   <ul><li>Agricultural area </li></ul><ul><li>Changes on hydrologica...
<ul><li>Forestry </li></ul><ul><li>Increase in surface water inflow and runoff  </li></ul><ul><li>Mud flows and landslides...
<ul><li>Building  </li></ul><ul><li>The more hard surfaces the more surface water  </li></ul><ul><li>Railways, other lando...
Examples of proposed solutions and mitigations <ul><li>Contingency / Inspection </li></ul><ul><li>Identify vulnerable poin...
Examples of proposed solutions and mitigations <ul><li>Publish a reliable, well documented description regarding road drai...
Examples of proposed solutions and mitigations <ul><li>Physical screen </li></ul><ul><li>Sealing the culverts and bank slo...
Examples of proposed solutions and mitigations <ul><li>Control dams </li></ul><ul><li>Increase the dimension of the road d...
<ul><li>An often-repeated adage in road construction and maintenance business is: </li></ul><ul><li>“ The three most impor...
 
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Session 70 Zahra Kalantari

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Session 70 Zahra Kalantari

  1. 1. <ul><li>Climate Change Adaptation of </li></ul><ul><li>Road Drainage </li></ul><ul><li>By Zahra Kalantari </li></ul>
  2. 2. <ul><li>The PhD project </li></ul><ul><li>“ Climate Change Adaptation of Road Drainage” </li></ul><ul><li>Funded by The Swedish Road Administration (Vägverket) </li></ul><ul><li>Operated by KTH, Land and Water Resources Dep. </li></ul><ul><li>PhD Student Zahra Kalantari </li></ul><ul><li>Supervisors: Professor Lennart Folkeson </li></ul><ul><li>Professor Per-Erik Jansson </li></ul><ul><li>Professor Bo Olofsson </li></ul>
  3. 3. <ul><li>Motivations </li></ul><ul><li>Road disruption </li></ul><ul><li>Aims </li></ul><ul><li>Methodology </li></ul><ul><li>Common causes of road damages </li></ul><ul><li>Impact of adjacent environment on road infrastructure </li></ul><ul><li>Examples of proposed solutions and mitigations </li></ul>
  4. 5. Motivations <ul><li>The climate change will lead to an increase in </li></ul><ul><ul><ul><li>The frequency of extreme precipitation events </li></ul></ul></ul><ul><ul><ul><li>Snow melt periods </li></ul></ul></ul><ul><ul><ul><li>Flooding on the roads </li></ul></ul></ul><ul><li>Hence the number of incidences on roads will increase. </li></ul>
  5. 6. Road disruptions <ul><li>Damages on the roads due to climate change including more frequent floods </li></ul>
  6. 7. Aims <ul><li>Analyse how climate change directly or indirectly affects road dewatering and drainage facilities in Sweden </li></ul><ul><li>Review the existing problems in road drainage systems focusing on the current Swedish climate </li></ul>
  7. 8. Aims <ul><li>Identify future problems considering the climate change including more frequent flood </li></ul><ul><li>Study the mitigation regarding the extreme weather events and climate change </li></ul>
  8. 9. Methodology <ul><li>International state-of-the-art review </li></ul><ul><li>Questionnaires </li></ul>
  9. 10. Common causes of road damages <ul><li>Water, the major cause of road damages </li></ul><ul><li>Reduced bearing capacity of the road by water </li></ul><ul><li>Clogged culverts inlets/outlets </li></ul>
  10. 11. <ul><li>The insufficient maintenance in form of ditch cleaning and edging </li></ul>
  11. 12. <ul><li>Lack of planning </li></ul><ul><li>Lack of knowledge </li></ul><ul><li>Standing water due to improper construction slope along the ditches </li></ul><ul><li>No overview over the shortcomings in road drainage </li></ul>
  12. 13. <ul><li>Limitation in ditch cleaning due to el-/tel cables </li></ul><ul><li>Intervals of culvert inspection and clearance </li></ul><ul><li>Location of the culverts and road drainage exposed, sensitive and critical to high flows </li></ul><ul><li>200-400 million SEK per year in lost efficiency </li></ul>
  13. 14. <ul><li>Frost heave movements and deformation of the ground surface </li></ul><ul><li>In cold climates the risk of frost damage is magnified when water is present </li></ul><ul><li>Washed-away roads and landslides due to </li></ul><ul><li>Flooding and high flows </li></ul><ul><li>Inadequate road drainage and dewatering system dimension </li></ul><ul><li>Improper road maintenance </li></ul>
  14. 15. Events require the greatest efforts for maintenance of road drainage system Scores
  15. 16. Impact of adjacent environment on road infrastructure <ul><li>Agricultural area </li></ul><ul><li>Changes on hydrological condition due to land use changes </li></ul><ul><li>Drained water from the agricultural area </li></ul>
  16. 17. <ul><li>Forestry </li></ul><ul><li>Increase in surface water inflow and runoff </li></ul><ul><li>Mud flows and landslides </li></ul><ul><li>Fraction of road ditches and soil damage </li></ul>
  17. 18. <ul><li>Building </li></ul><ul><li>The more hard surfaces the more surface water </li></ul><ul><li>Railways, other landowners and municipalities </li></ul><ul><li>Deficiencies in railway drainage systems </li></ul><ul><li>Poorly managed ponds; dam failure </li></ul><ul><li>Environmental protection </li></ul><ul><li>Legislation regarding nature protection </li></ul>
  18. 19. Examples of proposed solutions and mitigations <ul><li>Contingency / Inspection </li></ul><ul><li>Identify vulnerable points </li></ul><ul><li>Identify drainage shortages </li></ul><ul><li>Choose the right action </li></ul>
  19. 20. Examples of proposed solutions and mitigations <ul><li>Publish a reliable, well documented description regarding road drainage system standards </li></ul><ul><li>A business economic analysis model </li></ul>
  20. 21. Examples of proposed solutions and mitigations <ul><li>Physical screen </li></ul><ul><li>Sealing the culverts and bank slope </li></ul><ul><li>Prevent surface erosion by covering the bank </li></ul><ul><li>Erosion safe slopes </li></ul>
  21. 22. Examples of proposed solutions and mitigations <ul><li>Control dams </li></ul><ul><li>Increase the dimension of the road drainage </li></ul><ul><li>Extra culverts or drainage pipes </li></ul>
  22. 23. <ul><li>An often-repeated adage in road construction and maintenance business is: </li></ul><ul><li>“ The three most important things to understand in building and maintaining road are </li></ul><ul><li>drainage, drainage, and drainage” </li></ul>
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