https://padlet.com/alanizj/4c641scqeq12iuq3 IB ESS Y2- Unit 4 en-us 2020-09-01 19:29:30 UTC 2025-04-11 13:57:39 UTC hello@padlet.com https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713070299 Forest deforestation affects the hydrological cycle by: 
- Trees intercept rainfall. When deforestation occurs, there is more soil erosion.
- Trees impede the movement of water which allows for infiltration
- Trees absorb water through the root system. 

The forest absorbes water and reduces run-off. 

]]> 2020-09-01 19:37:26 UTC https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713070299 https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713073366 The movement of people from rural areas to town and cities.

--> Implementation of concrete and tarmac prevents water from passing through.
--> Run-off is often diverted into drainage systems which discharge into nearby rivers and streams. 
--> Increased volume of water entering surface waters can increase the risk of flooding. 
--> Aquatic habitats can also become degraded by the polluted run-off.

]]> 2020-09-01 19:38:36 UTC https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713073366 https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713073888 - Replanting forest vegetation can protect soil and reduce soil erosion because it intercepts rainfall
---> less erosion = less sediment = less water pollution

- Slows the movement of water
---> Allows time for infiltration

- Plant roots absorb run-off
---> reduced water flow and risk of floods

- Reforestation increases air moisture
---> prevents droughts

]]> 2020-09-01 19:38:48 UTC https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713073888 https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713074647

Reduce the amount of fertilizer used in crops.

Reuse animal waste is a sustainable way - preventing pollution run-off.

Limit the amount of pesticides used to control pests, and instead use integrated pest control (IPM) which is far more natural against pests.

]]> 2020-09-01 19:39:02 UTC https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713074647 https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713101930 - This human activity has the largest impact on the hydrological cycle.
- As population rises and there is a change to a meat-based diet, more water is required for the production and distribution of food.
- Poor drainage alongside excessive irrigation increases soil salinity levels.
---> Soil becomes sterile
- Water runs through agriculture land and accumulates pesticides.
---> Aquatic ecosystems and organisms are harmed.
---> Eutrophication is caused by fertilizers.
---> "Blue baby syndrome" (methaemoglobinaemia) is caused by an increased level of nitrates.
-Water comes into contact with animal waste.
---> There are pathogens and disease in animal waste.
---> Photosynthesis cannot happen as well, because light penetration to plants is reduced.]]> 2020-09-01 19:48:39 UTC https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713101930 https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713103702 (Sustainable Urban Drainage System).
Improve water quality and slow down water, thus reducing flood risk.

--> Encourage water to pass into the ground and aquifer.
-->  Slow the velocity of runoff into soak-away or infiltration trenches.
--> Provides protection from polluted water and can create green spaces.

 ]]> 2020-09-01 19:49:04 UTC https://padlet.com/alanizj/4c641scqeq12iuq3/wish/713103702