This Slide talks about the effects of human activities on quality and availability of water on the earth's surface.

1. EFFECTS OF ACTIVITIES
ON QUALITY AND
AVAILABILITY OF
WATER

2. “WATER QUALITY COMPRISES THE
PHYSICAL, CHEMICAL, AND
BIOLOGICAL CHARACTERISTICS OF
A WATER BODY… HUMAN
ACTIVITIES AFFECT BOTH WATER
QUALITY AND QUANTITY.”
(PETERS, N., MEYBECK, M.,
CHAPMAN, D., 2006)

3. COMMERCIAL FORESTRY
PLANTING FORESTS NEAR WETLANDS AND
STREAMS CAN RESULT IN THE WATER FLOW
BEING RESTRICTED AND EVENTUALLY DRYING
UP.

4. WETLAND DESTRUCTION
THEY ARE RESPONSIBLE OF STORING LARGE
AMOUNTS OF RAINWATER THAT FEED THE
GROUNDWATER AND STREAMS DURING DRY TIMES.
IF DESTROYED, THERE WILL BE FEWER WETLANDS
THAT ACT AS SPONGES OR NATURAL FILTERS OF
RIVER SYSTEMS.

5. POLLUTION
IMPROPER DISPOSAL OF WASTE CAN POLLUTE
BODIES OF WATER. THE DISCHARGE OF WASTE
OF SOME INDUSTRIES INTO NEARBY STREAMS IS
ALSO A CONTRIBUTOR TO POLLUTION.

6. POLLUTION
CLEANING WATER SOURCES ONCE POLLUTED IS
MORE COSTLY AND IT TAKES A LONGER TIME
TO DO SO.

7. AGRICULTURE
THE CHEMICALS FARMERS SPRAY ON THEIR
CROPS CAN SEEP INTO THE GROUND AND
COULD LATER ON FLOW ON STREAMS OR
RIVERS.

8. EXCESS WATER WITHDRAWAL
AROUND THE WORLD, LAKES, RIVERS AND
INLAND SEAS ARE IN THE PROCESS OF DRYING
UP BECAUSE TOO MUCH WATER IS BEING
DRAWN FROM THEM.

9. SEDIMENTATION
ACTIVITIES SUCH AS FARMING, CLEARING
FORESTS, BUILDING ROADS, AND MINING
INCREASE THE AMOUNT OF SEDIMENTS IN THE
WATER. THESE SEDIMENTS COULD CARRY TOXIC
CHEMICALS.

10. SEDIMENTATION
THEY COULD DAMAGE EQUIPMENT USED IN
WATER SUPPLY INSTALLATIONS AND IN
HYDROELECTRIC POWER PLANTS.
SEDIMENTATION CAN ALSO LIMIT RESERVOIRS’
CAPACITY.

11. URBAN GROWTH
CAUSES SCARCITY OF WATER DUE TO
INCREASING POPULATION

12. INFORMAL SETTLEMENTS
PEOPLE WHO LIVE IN AREAS AROUND WATER
SOURCES USUALLY BATHE, WASH CLOTHES, OR EVEN
DEFECATE, AT THE SAID WATER SOURCE, THUS,
CONTAMINATING IT. THIS INCREASES THE CHANCE
OF PEOPLE CATCHING WATER-BORNE DISEASES.

13. CLIMATE CHANGE
OBSERVED THAT LAND AND MOUNTAIN
GLACIERS ARE SHRINKING, AND THIS TREND
HAS ACCELERATED CONSIDERABLY IN RECENT
YEARS.