science

Illegal construction

Illegal construction is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Illegal construction rather than just read about it. In short: Illegal construction (also known as illegal building or illegal housing) is construction work (or the result of such) without a valid construction permit. Besides the potential technical hazards on uncontrolled construction sites and in finished buildings, illegal building activity can be a major environmental violation when the works encroach upon preserve areas like nature reserves.

Key takeaways

Illegal construction belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Illegal construction to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Illegal construction from memory before moving on to harder problems.

Reference excerpt

Illegal construction (also known as illegal building or illegal housing) is construction work (or the result of such) without a valid construction permit. Besides the potential technical hazards on uncontrolled construction sites and in finished buildings, illegal building activity can be a major environmental violation when the works encroach upon preserve areas like nature reserves. Likewise, illegal building can have serious political implications when it is practiced as landgrabbing or for illegal settling in foreign territories (see e.g. International law and Israeli settlements). Illegal building can be the consequence of a combination of urbanization, overpopulation, homelessness and poverty in which case expanding slums, Shanty towns or similar will result. On the other hand, illegal building activity may be due to profitable speculation with and exploitation of valuable real property. Demand for mass tourism accommodation (hotels, etc.) as well as its counterpart, individualistic luxury retreats for the very rich are visible drivers of such speculation. Similar motivation may come from incentives connected with the illegal construction of great shopping malls or similar on greenfield land. Even construction works with apparently valid permits can be a result of bribery. In some cases it can be observed that legal or tolerated settlements are later declared illegal by governmental institutions in order to make room for more lucrative investments or simply for political demonstration purposes (see e.g. Operation Murambatsvina) sometimes under the pretext of beautification.

Notable examples An infamous example of organized illegal construction can be found in the so-called Sack of Palermo. On the western edge of the Ilola district in Vantaa, Finland, there is an illegal village called Simosenkylä, where the houses are mainly dilapidated, some completely abandoned.

Environmental risks Increased landslide risk has been found to be associated with illegal building in hillside regions of densely populated urban areas in Italy and Bosnia and Herzegovina, because of loss of stabilizing vegetation by deforestation, etc.. Due to uncontrolled increase in impervious surface, the role of illegal construction has also been discussed in connection with flash floods (see 2011 European floods#Italy).

Detection In addition to human observation, large-scale screening for illegal building (activity) can also rely on remote sensing technology using satellite imagery (e.g. from EROS B, IRS-P5,...) and geospatial information systems.

References

http://www.jcpa.org/jl/vp498.htm Archived 2016-03-09 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with Illegal construction

Start with the simplest possible case. Write down what Illegal construction claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Illegal construction before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Illegal construction ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Illegal construction

In research: Illegal construction appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Illegal construction in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Illegal construction is common in secondary-school and first-year university syllabi. It links to neighbouring topics Construction safety, Criminal occupations, Environmental crime, so understanding it makes those chapters shorter.
In everyday life: Look for Illegal construction outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Illegal construction in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Illegal construction means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Illegal construction out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Illegal construction in simple terms?

Why does Illegal construction matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Illegal construction?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Illegal construction.