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12. environmental issues, impacts, mitigations
This document discusses the environmental impacts of roads, including both positive and negative impacts. It outlines how roads can improve quality of life but also cause issues like water degradation, wildlife mortality from habitat fragmentation and vehicle collisions, invasion of exotic species, erosion, and pollution. The document provides examples of mitigation techniques like culverts, fish ladders, wildlife overpasses, and restoration efforts. It emphasizes the importance of considering environmental impacts and mitigation in all phases of road planning, design, construction, and maintenance.
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12. environmental issues, impacts, mitigations
- 1. Environmental Issues, Impacts,and Mitigations of Roads Gordon Keller, PE, GE Geotechnical Engineer grkeller@fs.fed.us gordonrkeller@gmail.com
- 3. A Well Built MinimumImpact Road • Planning/Environmental Analysis • Location • Design • Construction • Maintenance • Road Closure or Obliteration
- 4. GOOD PLANNING + GOODENGINEERING (with conscience) = GOOD ENVIRONMENTAL MITIGACION
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- 6. What are theimpacts from roads? Positive Impacts • Improving quality of life • Better access to schools and clinics • Promoting development of areas • More rapid movement of goods and services • Lower operating costs • Lower cost of food and products • Everybody wants a road
- 7. What are theimpacts from roads? Negative Impacts • Degradation of water quality • Wildlife mortality and habitat fragmentation • Barriers to fish and AOP movement • Promoting movement of invasive species • Loss of terrain • Land use changes –forests to crops • Pressure on reserves and sensitive areas • Promotion of landslides and stream channel changes • Damage to coastal areas, mangroves, and swamps • High cost of maintenance and repairs • Use of resources • Deforestation and illegal logging/hunting • Pollution and trash • Traffic accidents
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- 14. Clean Water DirtyWater
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- 19. • Culverts • Fordsand LWX • Bridges Drainage Crossing Structures
- 22. A Fish Barrier FishPassage
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- 29. How big ofa problem is mortality, anyway? • Vehicle-caused wildlife mortality estimated at ONE MILLION vertebrates each day in US • Deer/vehicle collisions cost BILLIONS of dollars ANNUALLY • Virtually all wildlife species affected • Hundreds of people killed annually
- 35. Huan Xi Township,China
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- 40. Lake Jackson- turtle fence leading intoa culvert •
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- 44. Roads/Riparian Restoration Team KNAPWEEDSBLACKLOCUSTSTAR THISTLEMUSK THISTLE PURPLE LOOSESTRIFE KUDZUTAMARIX LEAFY SPURGEAILANTHUSRUSSIAN OLIVE
- 47. Roads/Riparian Restoration Team CostosAnuales en Billones de Dolares $1 Diseases $1 Mollusks $37 Mammals $25 Microbes $57 Insects $34 Plants $1 Fish $138 Billon por Ano!!
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- 50. Roads/Riparian Restoration Team Referencias 2002 DavidPimentel, Lori Lach, Rodolfo Zuniga, and Doug Morrison. Chapter 16 Environmental and Economic Costs Associated with Non- Indigenous Species in the United States
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- 57. COASTAL IMPACTS ONMANGROVES AND REEFS
- 59. DEFORESTATION AND ILLEGALLOGGING
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- 65. TRAFFIC SAFETY ANDACCIDENTS
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- 68. POOR OR MISSINGSIGNS
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