Advertisements
Advertisements
Questions
What is a Watershed?
Explain the following term.
Watershed
Advertisements
Solution 1
A watershed, or water divide is a ridge which separates the tributaries draining towards one side of it from those drawing towards the other. A watershed is never half way up a slope and on the two sides of it, the slope must be opposite and downwards.
Solution 2
A watershed, also known as a drainage basin, is a geologically defined area of land in which all precipitation and surface runoff flow into a single, shared water body such as a river, lake, or reservoir. Its limits are natural topographic ridges or hilltops that serve as a hydrological split, separating one basin from another. All water movements in this area are interrelated, making it the most important geographic unit for environmental planning. Modern conservation strategies place a strong emphasis on watershed management, which includes rainwater harvesting, soil erosion control, and groundwater recharge to restore ecological balance, prevent local flash floods, and ensure long-term water security for the communities that live within that drainage zone.
Notes
Students should refer to the answer according to their question.
APPEARS IN
RELATED QUESTIONS
What does the blue coloured circle in the grid square 0619 represent?
Give the six figure grid reference of lined well near Chekhla.
Name two relief features that can be seen in grid square 9782 and 9574.
Calculate the distance in kilometres along the cart track between Chitrasani (999747) and Pirojpura (978753).
Describe the importance of colours on the toposheet?
(i) What is the importance of a Relief Map.
(ii) How can we show occupations by the evidences of names or by inference of relief features?
Give a summary of dimension and scale of topographical maps.
Study the extract of the Survey of India Map sheet No. 45D/10 and answer the following questions:
(a) Name and give the four figure grid reference of a settlement where the people of the region meet at least once a year.
(b) What does the conventional symbol at grid reference 145132 mean?
(c)
If a man were to walk from Gulabganj (1820) to Harmatiya (1916):
(i) In which direction would he be walking?
(ii) Which are the two different kinds of roads that he would be using?
(d)
What do the following numbers in grid square 1718 and 1818 mean?
(i) 280 (ii) 281
(e) What are the two differences between the settlement Bamba in 1914 and those in 1813?
(f) Name four facilities that Anadra has which makes it an important settlement
(g) What is the quickest means of communication for the people of Dabani (1313)?
(h) What do the following mean:
(i) Brackish in 1915 (ii) Causeway in 1715 (iii) 6r in 1218?
(i) Mention two factors which support the following:
(i) The Sipu river is in its middle course
(ii) The rainfall in the region shown in the map extract is seasonal.
(j) What is the distance in kilometres between the distance stone 20 in 1818 and the causeway in 1715 along the metalled road?
Answer the following questions on the Survey Sheet Number 45 D/10. Eastings 00 to 10; Northings 17 to 28. (Map G)
(a) Give four-figure grid references of the following:
(i) Dhad Talao (ii) Sheet rock in the North-east
(iii) Rock outcrop in the North (iv) Stony waste in the South-east
(v) Open scrub south of Dhad Talao
(b) Give the six-figure grid references of the following:
(i) Police Chowki in village Dantral
(ii) Temple in Bhamra village
(iii) Well with water in settlement Devka
(iv) Spot height 310 near village Jolpur
(v) Tank near Indaria settlement
(c) Give-the direction of the following:
(i) Village Dantral (0324) from Dhann (0723)
(ii) Village Bhamra (0521) from Dhann (0723)
(iii) Village Jolpur (0718) from Malawa (0519)
(iv) Village Warka (0716) from Bikanwas (0316)
(v) Village Rampura (0617) from Dhann (0723)
(d) Give the meanings of the following:
(i) 15r in blue in grid square 0224.
(ii) 300 in brown in grid square 0426.
(iii) Black line in the northernmost part of the map.
(iv) Red line in grid square 0819.
(v) Black dots in grid square 0617.
(e) Give the settlement patterns of the following:
(i) Village Dhann (ii) In grid square 0220
(f) Measure the distances of the following:
(i) Direct distance in km. from Indaria (0826) to Jolpur (0718)
(ii) Indirect distance in km. along the cart track from Dantral (0324) to Dhann (0723)
(g) Give the drainage patterns of the following:
(i) 0827 (ii) In grid square 0226
(h) Name three man-made features found in grid square 0419 and draw their symbols.
(i) Give two evidences that the region gets seasonal rainfall.
(j) Explain the nature of the river.
(k) Explain the relief of the area.
(l) What is the general slope of the land? Give reason for your answer.
(m) What is the main occupation of the people? Give reason for your answer.
(n) What is the mode of irrigation? Give reasons for your answer.
(o) What is the mode of transport? Give reasons for your answer.
Study the extract of the Survey of India Map Sheet No. 45 D/7 (A – B) and answer the following questions:
(a) (i) What does the abbreviation R. F., stand for?
(ii) What does 20r (grid sq. 8295) mean.
(iii) What does V near Shergadh village in the south-east corner mean.
(b)
(i) What type of relief do you observe in north-west of the map (West Panswala)?
(ii) Why is the land shown in white shade not put to cultivation?
(c)
(i) What seems to be the importance of village Jegol in grid sq. 8590 in the south?
(ii) Find out the length of the joint stream of rivers Sipu, Varka and Hanva.
(d) What type of relief feature is found close to Varkanala and Hanvanala near Gangudra in the centre of the area?
(e) Give four figure grid reference of a well marked meander of Varkanala and Sipu river.
(f)
(i) What does the black line marked 24°30′ in the north denote.
(ii) What is the meaning of 72°20′ north-south black line in the western part of the map?
(iii) What do the figures 280, 300, 500 etc., written in brown on east margin of the map indicate.
(g)
(i) Point out two man-made features on the map.
(ii) What is the direction of the river Sipu 83 C 86 grid lines?
(iii) What is the grid reference (four figures) of the lime kiln located near Rampura village in the north-west?
