What are the advantages and disadvantages of canals?

What are the advantages and disadvantages of canals?

Canals are fed by rain water received by rivers, and the water is used for irrigation. Production of crops needing more water is also possible through canals. As compared to un-irrigated soils, higher productivity per hectare is also possible due to canals.

What are the main disadvantages of canal irrigation?

The major disadvantages of canal irrigation are:

• Any imbalance in the water distribution process results in a scarcity of water in some areas and water clogging in other areas.
• Water present stationary in the canal results in the growth of worms, mosquitoes, and insects.

What are the advantages and disadvantages of perennial canals?

Perennial canals irrigation: Advantages- It provides water throughout the year because it is connected with dams and barrages. Due to continuous availability of water farmers can grow numbers of crops which will help in their economic growth. We can also avoid drought situation.

What are the disadvantages of Indira Gandhi Canal?

But the downside is the resultant waterlogging, soil salinity and the spread of malaria. The 650-km sprawl of the Indira Gandhi canal has transformed large parts of Rajasthan’s arid wastes into lush farmlands. But the downside is the resultant waterlogging, soil salinity and the spread of malaria.

What are the two most important drawbacks of canal irrigation?

Drawbacks or Disadvantages of Canal Irrigation: The canal water soaks into the ground and results in water-logging along the canal route. Excessive flow of water in the fields raises the ground water level. Capillary action brings alkaline salts to the surface and makes large areas unfit for agriculture.

What were some problems with canals?

Food that rotted quickly could not be transported by canal as refrigerated units had yet to be invented. Canals could freeze up in winter and a hot summer could literally dry them out if they were not topped up with water on a regular basis. Trains were soon to take over the role played by the canals.

What are the two defects of the inundation canals?

1) As there is no head works structure the head of the canal is liable to be washed away during floods. 2) Duty of water is very low. 3) Since availability of water is dependent upon the floods, the scarcity of water is always felt.

What are perennial canals?

Answer: Perennial Canals flow throughout the year and are thus referred to as perennial canals. They draw water from perennial rivers or from artificial reservoirs which sustain a high water level on the upstream side. During the dry months, such canals are not beneficial.

Which is the longest canal in the world?

the Beijing-Hangzhou Grand Canal
Beijing-Hangzhou Grand The world’s oldest and longest man-made waterway is also a UNESCO World Heritage Site. Covering more than 1,100 miles and 2,500 years of history, the Beijing-Hangzhou Grand Canal connects five of the major rivers in China.

What are the advantages and disadvantages of canal lining?

Unlined canal sides and bed are very favourable for the growth of weeds. It reduces the velocity of the water flow through the canal. Hence, by providing lining, growth of weeds can be prevented. 5. Others High velocity prevents silting of the canal.

Why are canals a source of tourist attraction?

Canals are also becoming a source of tourist attraction these days. 1. Due to imbalance in distribution of canal water, a situation of scarcity somewhere and water logging in other areas is caused due to collection of water there.

What are the social evils of canal irrigation?

Many types of social evils are generated in canal areas. Sometimes, disputes arise for water distribution etc. resulting in murders and throwing of dead bodies by the bank of a canal.