Analyze the causes of flooding in Kolkata

The main reasons why Kolkata is susceptible to flooding are as follows:

1.Tropical Monsoon Climate: Kolkata is located in the tropical monsoon climate zone, which is characterized by high temperatures throughout the year, concentrated rainy seasons, and high precipitation. As a result, cities are vulnerable to flooding whenever the rainy season comes.

2.Flat terrain: Kolkata is relatively flat and poorly drained, which makes it easy for rainwater to accumulate in the city, exacerbating the effects of flooding.

3.Near the mouth of the river: Kolkata is located near the mouth of the Ganges River, which means that the city is at the confluence of the river and the sea.

This geographical location makes it difficult for the river to drain quickly in the event of a flood, which exacerbates the flooding.

4.Indian Ocean Hurricane Impact: Kolkata is also frequently affected by Indian Ocean hurricanes. The heavy rainfall brought by these hurricanes is also one of the reasons for the frequent flooding of cities.

In summary, Kolkata is susceptible to flooding for a number of reasons, both related to natural factors such as climate, topography, and human factors such as the city's geographical location and climate change. Therefore, it is necessary to analyze and respond to various factors in an integrated manner.

1. Tropical monsoon climate, the southwest monsoon brings abundant precipitation, and the rainy season is concentrated. 2. Located in the delta terrain, the terrain is flat; 3. Located near the estuary of the river, the river network is dense and the water flow is slow; 4. Often affected by hurricanes in the Indian Ocean.

(1) Characteristics: BAI has the most precipitation at the equator, and DU is in the equatorial direction.

The Tropic of Cancer (subtropical) decreases, and precipitation increases north of 30°N and 30°S, and more precipitation on the island of Madagascar.

Reason: The equatorial region is controlled by the equatorial low pressure zone all year round, and the prevailing updraft has abundant precipitation; Near the Tropic of Cancer, precipitation is scarce all year round under the control of the subtropical high downdraft or dry trade winds. South and north of 30°N, precipitation increased due to the prevailing westerly winds. The island of Madagascar receives a lot of precipitation due to warm currents and the windward slope of the southeast trade winds.

2) The seasonal variation of river water volume is large; In the northern hemisphere, the equatorial depression moves northward (influenced by the southwest monsoon from the ocean) in the summer half of the year (May to October or the rainy season), with abundant precipitation and abundant river water. The winter half of the northern hemisphere (November to April or the dry season) is affected by dry trade winds from the interior of the continent, and there is less precipitation and less river water.

3) Characteristics: high birth rate, reduced mortality rate, high natural population growth rate.

Problem: Population growth is too fast; increasing pressure on the economy, employment, etc. (or affecting the rapid improvement of living standards); Aggravate resource consumption and environmental problems.

4) tropical rainforest climate with sufficient hydrothermal conditions; Convenient sea transportation, convenient for export to overseas markets; Low labor costs, long history of cultivation, (or ** support), etc.

5) drought; Desertification of land.

Drought: It belongs to the savannah climate zone, with large changes in precipitation (unstable precipitation), high temperatures, and high evaporation.

Land desertification: climate change, overgrazing, over-mining, over-farming, etc. Outline.

1) Precipitation decreases from west to east. The precipitation in this region mainly comes from westerly precipitation. There is a west to east from the Atlantic Ocean from near to far, and the water vapor from more to less. (3 points).

2) The terrain is low and flat, and the drainage is not smooth; The permafrost is widely distributed and is not easy to infiltrate; The temperature is low and the evaporation is weak; The river basin area is large, the river network is dense, and there are often floods. (4 points).

3) more abundant resources; Defense Factor (2 points).

4) Mainly distributed in the south of Russia, especially in the southwest. Russia has a high latitude and a cold climate, while the south is relatively warm; The country spans a large east-west span, and the west is relatively far from the Atlantic Ocean, and it is relatively warm and humid. (three minutes) omitted.