IMPACTS OF DEVELOPMENT PROJECTS

IMPACTS OF

DEVELOPMENT PROJECTS

SNSCE/CIVIL/KEERTHI KUMAR B/GE8071 - DM - Unit 3

WHAT IS THE FUNCTION OF A

DAM?

DAMS PROVIDE A MEANS OF

REGULATING DOWNSTREAM

SURFACE WATER FLOWS OVER

SPACE AND TIME BY ALTERING THE

NATURAL SPATIAL AND TEMPORAL

DISTRIBUTIONS OF STREAM FLOWS.


WHY BUILD DAMS?

TO IMPROVE THE QUALITY OF HUMAN LIFE BY PROVIDING……

WATER QUALITYIRRIGATION SNSCE/CIVIL/KEERTHI KUMAR B/GE8071 - DM - Unit 3

FLOOD CONTROL

HYDROPOWER

RECREATION

NAVIGATION


TOURISM WATER DIVERSION


ENVIRONMENTAL IMPACTS OF DAMS



ENVIRONMENTAL IMPACTS OF DAMS

➢ Terrestrial Ecosystems and Biodiversity

➢ Greenhouse Gas Emissions

➢ Downstream Aquatic Ecosystems and Biodiversity

➢ Impacts of changes in flow regimes

➢ Impacts of trapping sediments and nutrients behind a dam

➢ Blocking migration of aquatic organismsSNSCE/CIVIL/KEERTHI KUMAR

B/GE8071 - DM - Unit 3


NON RECIPROCAL EFFECTS OF DAMS ON SOCIETY

▪ Hydropower

▪ Irrigation, Drainage & Flood control

▪ Displacement of People and Livelihoods

▪ Downstream Livelihoods

▪ Cultural Heritage

▪ Under-counting of the displaced

▪ Physically displaced populations enumerated but not resettled

▪ Socio-economic Impacts through the Planning and Project CycleSNSCE/CIVIL/KEERTHI KUMAR B/GE8071 - DM - Unit 3


DAM FAILUREMAIN CAUSES OF DAM FAILURE-

▪ EARTHQUAKES

▪ EXTREME INFLOW

▪ POOR MAINTENANCE , ESPECIALLY OF OUTLET PIPES

▪ HUMAN, COMPUTER OR DESIGN ERROR

▪ INTERNAL IRROSION OR PIPING, ESPECIALLY IN EARTHEN DAMS

▪ SLIDING OF MOUNTAIN INTO RESERVOIR

▪ SUB-STANDARD CONSTRUCTION MATERIALS/TECHNIQUES

▪ SPILLWAY DESIGN ERROR

▪GEOLOGICAL INSTABILITY CAUSED BY CHANGES TO WATER LEVELS DURING FILLING OR POOR SURVEYINGSNSCE/CIVIL/KEERTHI KUMAR

B/GE8071 - DM - Unit 3

LIST OF DAM FAILURES



Documents

IMPACTS OF DEVELOPMENT PROJECTS