ecology help needed!!?

Question

How does the human population disrupt the water cycle?

Answer 1

over popúlation and some related effects

in Mexico ,South America,Asia etc. the expanding
populations are consuming forrests for agriculture and habitat.
In the last 50 years world population has doubled a faster growth ever since we became homo sapian.
the effects on the environment are
,erosian,over pumping of carbon aquifiers(deep wells)
desertification,rising seas,land loss,deforrestation,watershort...
excess carbon emissions,mass extinction of species and global warming.

DEFORRESTATION if it continues ,is that we could end up looking like Mars.Without an atmosphere ,without water,without air,with out life

the forrests make most of the water that we can drink or use for plant growth(sweet water)
some is condensed from the sea but that reaches only the coastel aereas .
the bulk ,comes from the forests ,and the rivers come from the rainfall which comes from the trees ,
and the trees with precipitation,feed the rivers when it is not raining and keep them running all year round.

If we kill all the trees,we kill the rivers .we kill the rain. we kill us.
the trees also absorb the heat in the day and heat up the place in the night ,so they keep the temperature confertable to live in.

in the dessert the nights are freezing cold and during the days you burn up

CARBON MONOXIDE
the trees absorb carbon emisions ,which is poison to us and they produce oxygen which we need to breathe.

so in short the trees produce the air that we need to breathe.
they also produce wood which is usefull and a wide range of food such as fruits

deforestation must be stopped before desertification goes out of control and consumes the planet.

DESERTIFICATION
the sahara is growing by 7 kilometres every day.
two major desserts in northern china are growing together making one giant dessert and,causing dust storms so making thousands of people refugeese

the trees evaporate a mist which ,which protects us from the strong rays of the sun .

the planet is drying out at an alarming rate.

in the days of the dinasaurs this planet was under an aquiferus manta ,a mist that covered the entire earth ,and there were no desserts .
Count how many there are today,and all of them are as a result of mans actions.
the sahara used to be forrests
arabia ,irak ,iran used to be fertile lands in biblical times
Ghengas Kahn burned all the forrests here and filled the well with water and so turning vast lands into dessert.

Bad agricultural practises is turning vast teritories into desserts ,because of over grazing and the exessive pumping of carbon aquifiers ,the surface aquifiers already having been depleted.
And the use of fertilisers and heavy machinery that compacts the ground which raises the salt in the soil.
Modern agriculture today is doing the same as ghengas kahn but in much bigger territories.

And because agricultural lands are lost, farmers are forced to cultivate highly erodable lands, to keep up with the growing demand for food.an extra 70 million people each year and this is increasing
the world population has doubled in the last 50 years the fasted increase ever since the first homo sapian.

EROSION
soil erosion is almost always as a result of human intervention.
the trees are cut down and these trees existed to provide a cover against the rays of the sun which now dries out the soil ,and the wind can than easily blow away the dust that is formed ,------this is wind erosian

because the trees are no longer there, whose roots bound the soil together ,and because their canapies of foilidge no longer exist the rain now has easy acces to the unprotected ,now dry surface and the rain waters wash away the top soils ,------this is water erosian

In Mexico indigenous peoples are cutting down trees to plant corn ,this land is productive for a few years before it becomes poor and useless for farming.

MUD SLIDES
the roots of the trees that have been cut down rot and tunnels are created with their diaaperance ,with heavy rains thes tunnels fill up with water and the soil lift and moves down wards .

mudslides are caused and large parts of the mountains are exposed to the rock.

the mud destroys the lands beneath and the exposed areas NEVER recover leaving the area with out vegetation forever

WATERSHORTAGE,OVERPOPULATION
each year 70 million more people are consuming water but this is ,but a small part of what agriculture uses.

so our consumption of water is ever increasing and our drinkable water supply is shrinking because of polution ,and the production of potable water is less all the time because of deforestation. Source(s) Lester E Brown is the director and founder of the global institute of Environment in the United states .he has compiled a report based on all the satalite information available from NASA,and all the information that has
come from Universities and American embassies WORLD WIDE ,
his little book--a planet under stress , Plan B has been trans lated into 50 languages and won the best book award in 2003.

Answer 2

Human population doesn't disrupt the water cycle, but it certainly puts demands on fresh water.

Answer 3

We remove water from the natural system for our own uses, and when we return that water into the natural system, it is not necessarily in the same condition or in the same place that we got it.