Surface water erosion
In order to stop surface water erosion it is necessary to reduce water speed. At this regard and in order to protect a riverbed, men build river bridles, i.e. a series of steps along the river flow. In order to prevent floods, instead, artificial banks are built. When building them, it is important to calculate the natural space the river needs in order to let floodwater drain off. In order to reduce the quantity of water of a riverbed during a flood, water tanks (that can provisionally transmit a certain quantity of water) and drainage channels (that divert the river flow) are designed.
Special reports
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13 May 2013
Small steps, great footprints
Have you ever wondered how much space is taken up by an apple or a steak?...
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28 August 2020
The Earth seen from above: signs of fires
This image was taken by the ASTER sensor installed on the NASA TERRA satellite platform. The image was taken on…
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15 July 2020
Earth viewed from above
Remote satellite sensing: what it is and what it is used for In the scientific field, the images produced by…
30 April 2019
Urban woods
When walking along a tree-lined avenue in a crowded and traffic-congested city, wrapped up in our daily commitments, we do…
12 April 2019
Easter with extinct friends
Easter Island is shaped like a triangle with three extinct volcanoes placed at the vertices, and has a total area…
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13 May 2013
Small steps, great footprints
Have you ever wondered how much space is taken up by an apple or a steak?...
-
28 August 2020
The Earth seen from above: signs of fires
This image was taken by the ASTER sensor installed on the NASA TERRA satellite platform. The image was taken on…
-
13 May 2013
Small steps, great footprints
Have you ever wondered how much space is taken up by an apple or a steak?...
From the Multimedia section
Facts
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Mountains on the Earth
The different landscapes that we analysed in the previous section are distributed...
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The most populated cities in the world
In the last 50 years the world population has passed from 2.5 billion to 6 billion...
Soil erosion
Just like water, air and other natural elements, the soil may be considered a resource; it is, however, a non-renewable…
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13 May 2011
Mountains on the Earth
The different landscapes that we analysed in the previous section are distributed...
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13 May 2011
The most spectacular waterfalls
The highest waterfalls in the world are located in Venezuela...
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Mountains on the Earth
The different landscapes that we analysed in the previous section are distributed...