Write a short note on Indian dessert
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Answer:
The Thar Desert, also known as the Great Indian Desert, is a large arid region in the northwestern part of the Indian subcontinent that covers an area of 200,000 km2 (77,000 sq mi) and forms a natural boundary between India and Pakistan. It is the world's 17th largest desert, and the world's 9th largest subtropical desert.
About 85% of the Thar Desert is located within India, with the remaining 15% in Pakistan.[1] In India, it covers about 170,000 km2 (66,000 sq mi), and the remaining 30,000 km2 (12,000 sq mi) of the desert is within Pakistan. The Thar desert forms approximately 5%(~4.56%) of the total geographic area of India. More than 60% of the desert lies in the state of Rajasthan, and extends into Gujarat, Punjab, and Haryana.[2] The desert comprises a very dry part, the Marusthali region in the west, and a semidesert region in the east with fewer sand dunes and slightly more precipitation.[3]
The Thar Desert extends between the Aravalli Hills in the north-east,[1] the Great Rann of Kutch along the coast and the alluvial plains of the Indus River in the west and north-west. Most of the desert is covered by huge shifting sand dunes that receive sediments from the alluvial plains and the coast. The sand is highly mobile due to strong winds occurring before the onset of the monsoon. The Luni River is the only river integrated into the desert.[4] Rainfall is limited to 100–500 mm (3.9–19.7 in) per year, mostly falling from July to September.[1]
Salt water lakes within the Thar Desert include the Sambhar, Kuchaman, Didwana, Pachpadra and Phalodi in Rajasthan and Kharaghoda in Gujarat. These lakes receive and collect rain water during monsoon and evaporate during the fat season. The salt is derived by the weathering of rocks in the region.[5]
Lithic tools belonging to the prehistoric Aterian culture of the Maghreb have been discovered in Middle Paleolithic deposits in the Thar Desert.[6]
Desertification control
Greening desert with plantations of jojoba at Fatehpur, Shekhawati
Checking of shifting sand dunes through plantations of Acacia tortilis near Laxmangarh town
Indira Gandhi Canal flowing in Thar Desert near Sattasar village, Bikaner district, Rajasthan
The soil of the Thar Desert remains dry for much of the year and is prone to wind erosion. High velocity winds blow soil from the desert, depositing some on neighboring fertile lands, and causing shifting sand dunes within the desert. Sand dunes are stabilised by erecting micro-windbreak barriers with scrub material and subsequent afforestation of the treated dunes with seedlings of shrubs such as phog, senna, castor oil plant and trees such as gum acacia, Prosopis juliflora and lebbek tree. The 649 km (403 mi) long Indira Gandhi Canal brings fresh water to the Thar Desert.[1] It was conceived to halt spreading of the desert to fertile areas.
There are few local tree species suitable for planting in the desert, which are slow growing. Therefore, exotic tree species were introduced for plantation. Many species of Eucalyptus, Acacia, Cassia and other genera from Israel, Australia, US, Russia, Zimbabwe, Chile, Peru and Sudan have been tried in Thar Desert. Acacia tortilis has proved to be the most promising species for desert afforestation and the jojoba is another promising species of economic value found suitable for planting in these areas.[1]
Protected areas
There are several protected areas in the Thar Desert.
In India:
the Desert National Park covers 3,162 km2 (1,221 sq mi) and represents the Thar Desert ecosystem;[7] it includes 44 villages.[8] Its diverse fauna includes the great Indian bustard (Chirotis nigricaps), blackbuck, chinkara, fox, Bengal fox, wolf, and caracal. Seashells and massive fossilized tree trunks in this park record the geological history of the desert;
the Tal Chhapar Sanctuary covers 7 km2 (2.7 sq mi) and is an Important Bird Area.[8] It is located in the Churu District, 210 km (130 mi) from Jaipur, in the Shekhawati region. This sanctuary is home to a large population of blackbuck, fox and caracal such as partridge and sand grouse;
the Sundha Mata Conservation Reserve covers 117.49 km2 (45.36 sq mi) and is located in the Jalore District.[9]
In Pakistan:
the Nara Desert Wildlife Sanctuary covers 6,300 km2 (2,400 sq mi);[10]
the Rann of Kutch Wildlife Sanctuary.
The Thar Desert, also known as the Great Indian Desert, is a large arid region in the northwestern part of the Indian subcontinent that covers an area of 200,000 km² and forms a natural boundary between India and Pakistan. It is the world's 17th largest desert, and the world's 9th largest subtropical desert.
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