Created by Ma. Maiden Continedo from University of Southeastern Philippines taking Bachelor of Science in Secondary Education Major in Biological Science.

2.  Arch dams
 Gravity dams
 Arch- gravity dams
 Barrages dams
 Embankments dams

3. Arch dams
-The most desirable place
for an arch dams is a
narrow canyon with steep
side wall abutments
Two types:
Constant-radius dam
Constant-angle dam

4. Gravity dams
- Classified as ‘solid’ or
‘hollow’ and made either
concrete or masonry.
-The force that holds the
dam in place against the
push from the water in
earth’s gravity pulling down
on the mass of the dam.
- can prove to be a better
alternative to other types of
dam.

5. Arch-gravity dams
- for areas with massive
amounts of water flow less
material available for a
purely gravity dam.

6. Barrages dams
- is a special kind of dam
which consist of a line of
large gates that can be
opened or closed to control
the amount of water
passing the dam.

7. Embankment dams
-are made from compacted
earth, and have two main
types; rock -fill and earth –
fill dams.
-rely on their weight to hold
back the force of water, like
gravity dams made from
concrete.

8.  Power generation
 Water supply
 Stabilize water flow/irrigation
 Flood prevention
 Land reclamation
 Water diversion
 Navigation
 Recreation and aquatic beauty

10.  The word ‘ flood’ comes from old English ‘flod’ ( float , flow )
 As flood as a covering by water of land not normally covered by
water, “ Flowing water”. Flooding may result from the volume of
water w/in a body of water, such as lakes or rivers, which overflows
or breaks levees w/ the result that some of the water escapes its
usual boundaries.

11. Principles and causes
 Revering
 Estuarine
 Coastal
 Catastrophic
 Human-induced
 Muddy
 other

12. Effects:
 Primary effects
 Secondary effects
 Tertiary and Long-term
effects
- physical damage
- Water supplies
- Diseases
- Crops and food supplies
- Trees
- Transport
- Economic

14.  comes form the ground
 is even used to irrigate crops w/c grows food.
 comes from rain, snow, sleet and hail that soaks into the ground.
 the area that filled w/ water is called the saturated zone and the top zone
is called the water table.
 an area that holds a lot of water, w/c can be pumped up w/ a well is
called an aquifer.
Note:
Most groundwater is clean but groundwater can become polluted or
contaminated.

15. The End......
Prepared by:
Continedo, Ma. Mieden D.
BSED- Bio Sci II