Embankment dams, their zoning and selection - Geotechnical Engineering of Dams - page 325

3. Social and economic
Loss of service to the community None expected 10% of the community 10% to 30% of the community 30% of the community affected

affected affected

Public health adversely affected No effect 100 people affected 100 to 1000 people affected for 1000 people affected for

one month one month one month

Cost of emergency management None expected 10 person days 10 to 100 person days 100 person days

Dislocation of people No effect 5 families 5-100 families 100 families

Dislocation of business No effect 5 businesses 5-20 businesses 20 businesses

Employment affected No jobs lost 10 jobs lost 10 to 100 jobs lost 100 jobs lost

Production affected None expected Regional output affected Regional output affected by Regional output affected by 30%

by 10% 10% to 30%

Post disaster trauma and stress None expected 100 person months 100 to 500 person months 500 person months

Injured and hospitalized Nil 10 10 to 50 50

Loss of heritage None expected Assessment based on community

consultation

Loss of recreation facility None expected Local facility Regional developed facility National facility

4. Natural environmental
Area of environmental impact

0.1 km 2 0.1 km 2 to 1 km 2 1km 2 to 10 km 2 10 km 2

Duration of environmental impact 1 month 1 month to 1 year 1 year to 10 years 10 years

Significant factors None expected Forested land may contain Diverse species are likely to Endangered species identified

environmental factors exist

Ecological value None expected Likely to alter, say, fish Significant habitat may exist Impact on an important value, say

habitat fish breeding area

Habitat units None expected Minor effect on wetland Medium effect Major effect

or forest