5.- Videos.

Equity - Everyone has equitable, affordable and safe sanitation - is one of the six Manila-principles, which provide a framework for action by setting the broad vision for sustainable and inclusive urban sanitation.

Please find more videos & information about the principles and on how African and Asian cities are moving towards CWIS here: http://www.sandec.ch/towards_cwis

Environment & public health is one of the six Manila-principles, which provide a framework for action by setting the broad vision for sustainable and inclusive urban sanitation.

Please find more videos & information about the principles and on how African and Asian cities are moving towards CWIS here : http://www.sandec.ch/towards_cwis

Water is essential for life, but for many people the quality of water available may be poor.

Analysis of a water supply may be required to find out whether the water is safe to drink or whether it needs to be treated before consumption.

Methods of analysing the quality of water are discussed in other films in this series.

It is just as important, however, to ensure that the samples of water tested are representative of the water supply as a whole.

Water sampling is therefore as important an activity as the process of water analysis and is the subject of this film.

This video presents the relevant tasks required to run a Black Soldier Fly facility.

For more detailed information and a free download of the "Black Soldier Fly Biowaste Processing - A Step-by-Step Guide", go to: https://goo.gl/gBT8dv

.- This is how drinking water gets contaminated. .- The drinking water crisis can be resolved.

Visit www.communitywatercenter.org.

In today's video we'll cover :

.- What wastewater is. .- The different sources of wastewater. .- How we can treat wastewater.

In today's vid, you'll learn:

.- What potable water is. .- How we can get it by treating fresh water sources. .- How we can get it by desalinating seawater.

Biodiversity has loads of benefits.

In this video we explore how we can maintain high biodiversity with things such as breeding programs and conservation.

We also cover why these things don't happen as much as they should.

What is global warming and climate change and how will they affect the planet?

Learn about how and increase in greenhouses gases is leading to global warming, and how organisms across the world are responding to this warmer world!

This video discusses how aquifers can be exposed at the surface (unconfined) or buried by overlying rocks and sediments (confined).

Key ideas:

💧 Aquifers are replenished where they are unconfined 💧 Confined aquifers are covered by low permeability rocks 💧 Confining layers may prevent a direct connection between different aquifers 💧 Groundwater in confined aquifers is under pressure 💧 Pumping groundwater from boreholes lowers the water table in the surround aquifer

This video discusses groundwater in terms of the aquifer rock properties; porosity and permeability.

Key ideas:

💧 Aquifer porosity is the total amount of water that it can store 💧 Aquifer permeability is the rate that groundwater flows through 💧 For groundwater to flow easily through the rock (highly permeable) the open spaces must be interconnected

Water is continually moving through the environment – we call this the water cycle. This video talks about an important aspect of the water cycle – groundwater.

Key ideas:

Groundwater forms an important component of the water cycle:

💧 Rainfall infiltrates into the ground to replenish groundwater 💧 Rocks that store groundwater are called aquifers 💧 Groundwater is contained in rocks in the spaces between grains and in cracks 💧 The level of groundwater in an aquifer is called the water table 💧 We monitor groundwater levels using observation boreholes 💧 Groundwater levels vary with time and spatially 💧 Groundwater flows from areas where the water level is high to areas where the water level is low 💧 Flow in many of our rivers is supported by groundwater inflow from aquifers.