Cumulative Environmental Effects Flashcards
define cumulative environmental effect
effects of an additive, interactive, synergistic, or irregular (surprise) nature
caused by individually minor but collectively significant actions that accumulate over space and time
a good cumulative environmental assessment (CEA) focuses on what
-conditions of the environmental receptors
-whether the total effects by the stressors are acceptable
single source pathway of cumulative effect
-single activity has multiple effects
-potential interactions between them may create cumulative effects
multiple source pathway of cumulative effect
multiple actions accumulate in an additive manner
multiple action interact in a synergistic way
regional assessments
are studies of existing and/or anticipated development in a region and help manage cumulative effects.
used in planning process
CEA in IAA 2019
-CEA in project focused
-The CEA must consider other physical activities that have been carried out up to the time of the analysis or that will be carried out in the future, provided that they are likely to affect the same VCs as those of the designated project for which residual effects have been identified.
what are the two models for CEA
Effects Based CEA
Stressor Based CEA
Effects Based CEA
considers the effects to VEC’s and indicators of VECs
“what has happened?”
Stressors Based CEA
considers agents of change like the projects and types of changes
“what might happen?”
CEA Framework/steps
Scoping
Retrospective Analysis
Prospective Analysis (risk assessment)
Management
scoping in CEA
Spatial Boundaries (spatial/analysis/phenomenon/administrative scale)
Temporal Boundaries
What is the MB Hydro Bipole-3 transmission line
1400km transmission line from N MB near Gillam to S Winnipeg
Regional Cumulative Effect Assessment MB Hydro
The Regional Cumulative Effects Assessment (RCEA) of existing hydroelectric developments will be retrospective in nature and will assess environmental change (quantitative and qualitative) and socio-economic effects over time in the main areas directly affected by Lake Winnipeg Regulation, Churchill River Diversion and associated transmission projects.
challenges and concerns of CEA
-primary concern is reducing project based stress
-thresholds are not easily determined
-future based and demand foresight
-predictions can be inconsistent to due environmental variability
-roles and responsibilities
