Topographical Maps ANSWER KEY- Assignment 6 Question 1 (To be answered using toposheet 45 D/7, Grid reference 76 to 85) 1. Cite two differences between the Sipu River and the Mahadeviyo Nala? Sipu River Mahadeviyo Nala 1 Has a perennial channel Completely dry 2 Flows through broken ground Doesn t flow through broken ground 3 Broad Narrow 2. What is the main occupation of people in the map? State another occupation of the people in grid square 8189. Agriculture, Construction / Lime making 3. What inference can be drawn from the black lines found along the river in grid square 8195? The black lines indicate broken ground. This feature is caused due to gully erosion along the river banks. This happen when long dry spells are followed by sudden downpour. This indicates that the area has seasonal rainfall / alternate wet and dry spells. 4. What is the slope of the area given in the map extract? Give reasons for your answer. The slope of the area is towards south-south-west. This can be said because the main river (Sipu River) flows towards SSW as indicated by the arrow in the river. 5. Describe the relief of the area. The area is mainly a plain / has low relief. There are a few sand dunes in the northwest corner of the map. There are two rivers Sipu River and Mahadeviyo Nala. Both are dry and contain a lot of sediment. However, there is a perennial channel in Sipu River. Both the rivers flow through broken ground. Question 2 (To be answered using toposheet 45 D/7, Grid reference 85 to 93) 1. Name three rivers in the map extract and distinguish between them. The three rivers in the map are a) Sipu River main river, has more sediment, has perennial water channel b) Varka nala tributary of Sipu river, has less sediment and a perennial water channel c) Hanva Nala tributary of Varka Nala, has less sediment and is completely dry 2. What is the main occupation of people in the map? Give reasons for your answer. Agriculture; this is indicated by the yellow colour on the map. SN Kansagra School / Department of Geography / Std 10 2008-09 1
3. State two evidences that suggest that the area receives seasonal rainfall. Dry streams, broken ground, wells 4. What is the slope of the area given in the map extract? Give reasons for your answer. The slope of the area is towards the west. This can be said because all the rivers converge towards the western part of the map. 5. What kind of slope do you find in the extreme south east corner of the map? Give reasons for your answer. The slope in the south east corner of the map is steep. This can be said as the contours are close to each other. Question 3 (To be answered using toposheet 45 D/7, Grid reference 92 to 01) 1. In which course of river development is Dholva Nala? Give reasons for your answer. Dholva Nala is in the upper course of river development. This can be said because the area is a hilly one and the rivers are narrow and have less water 2. List two occupations of people in the map. Support your answer with evidences from the map. The occupations of the people in the area are a. Agriculture as indicated by yellow colour found in the map b. Lumbering as indicated by the presence of forests in the region and settlements in the forests 3. What kind of vegetation is found in the map? Tropical deciduous forests, thorny shrubs 4. What is the slope of the area given in the map extract? Give reasons for your answer. The slope of the area is towards west-south-west. This can be said because the main river (Dholva Nala) flows towards SSW as indicated by the arrow in the river. 5. Which relief feature do you find in the grid square 0094? What other relief features are seen in the map? The feature seen in 0094 is a saddle. Other features seen in the map are mountains, hills, plains, dry rivers, V-shaped valleys (0091), etc. SN Kansagra School / Department of Geography / Std 10 2008-09 2
Question 4 (To be answered using toposheet 45 D/7, Grid reference 76 to 85) 1. Describe the nature of rivers found in the given map extract. Banas River flows towards the west. It is in its middle course as indicated by the large amount of sediment present in the river valley. It consists of a perennial water channel. At a few places it flows through broken ground. Sarod Nala is a tributary of Banas River. It is dry and consists of sediment. It flows towards the south west through broken ground. 2. What is the main occupation of people in the map? Give reasons for your answer. Agriculture; this can be said because most of the map has a yellow colour. 3. State two evidences that suggest that the area receives seasonal rainfall. Dry rivers, broken ground 4. If you walk downstream along the Banas river, which features would you see on your left and which features would you see on your right? Left Hill, Canal, Sand dune, stone quarry Right Sarod Nala, Dense Jungle, broken ground 5. What is the difference between the relief of the northern and southern part of the map? The northern part is mostly a southward sloping plain with features like broken ground. The southern part is a very flat plain as indicated by disappearing rivers. At a few places, broken ground is also seen. Question 5 (To be answered using toposheet 45 D/7, Grid reference 85 to 93) 1. List two differences between the northern and southern rivers. The northern rivers are longer and meet the main river while the southern rivers are short and disappear before meeting the main river. 2. What are the occupations followed by people in the map? Give reasons for each of them. Agriculture, Cattle rearing; this is because the area has seasonal rainfall and cattle rearing provides monthly income by selling milk. 3. Give evidences that the area receives seasonal rainfall. Dry rivers, broken ground and wells. SN Kansagra School / Department of Geography / Std 10 2008-09 3
4. What is the general slope of land in the northern part? Give reasons for your answer. The slope of the land in the northern part is towards the south. This can be said because there is a hilly region in the north from which many rivers originate and meet the main river present in the southern part of the hills. 5. What is the type of relief in the southern part of the map? The area is mainly a plain / has low relief. There are a many depressions and sand dunes. Since the area is sandy and has low relief rivers originating from this area disappear into the sand. Question 6 (To be answered using toposheet 45 D/7, Grid reference 93 to 01) 1. Why is the volume of water less in the rivers? The volume of water is less in the rivers as the area receives seasonal rainfall. 2. What are the occupations followed by people in the map? Give reasons for each of them. Agriculture yellow colour; Construction metalled road under construction 3. What is indicated by broken ground in the region? Broken ground is caused due to gully erosion along the river banks. This happens when long dry spells are followed by sudden downpour. This indicates that the area has seasonal rainfall / alternate wet and dry spells. 4. What is the general slope of the area? Give reasons for your answer. The slope of the area is towards the west. This can be said because the both Banas river and Balaram Nadi meet and start flowing towards the west. 5. What is the type of relief is found in the following grid locations? a. In grid square 9782 - Hill b. In grid square 9578 - Sand dune c. In grid square 9574 - Ridge d. In grid square 9679 - Broken Ground Question 7 (To be answered using toposheet 45 D/10, Grid reference 01 to 10) 1. Explain the nature of the river. The river is dry and flows towards the south. The presence of sediment and broken ground indicate that it is in its middle course. SN Kansagra School / Department of Geography / Std 10 2008-09 4
2. Which is the main occupation followed by people in the map? Which additional occupation is likely to be followed by people? Agriculture, Cattle rearing 3. List three evidences which prove that the area receives seasonal rainfall. The three evidences that prove that the area receives seasonal rainfall are dry rivers and tanks, broken ground and wells. 4. What is the general slope of the area? Give reasons for your answer. The slope of the area is towards south. This can be said because the main river flows towards the south as indicated by growing width of the river in the southward direction. Additionally, the presence of greater heights in the north (339 metres in grid square 0427) and lower heights in the south (263 metres in grid square 0316) also endorses this fact. 5. Explain the relief of the area. The area is mainly a plain / has low relief. There is only one river which flows southwards. It is dry and flows through broken ground. There is only one small hill in the south east corner of the map. Question 8 (To be answered using toposheet 45 D/10, Grid reference 10 to 18) 1. Name two rivers found in the region and list three differences between them. The two rivers found in the map are Dior Nadi and Unda Nala Dior Nadi Unda Nala 1 Broad Narrow 2 More sediment Less sediment 3 Main river Tributary of Dior Nadi 2. Which is the main occupation followed by people in the map? Support your answer with evidence from the map. Agriculture. This is indicated by the presence of yellow colour in the map. 3. Why is there no water in the rivers? There is no water in the river as this area receives seasonal rainfall. 4. Which part of the map do the rivers originate from? The rivers in the map originate from the north. 5. What is the difference between the relief in the northern and southern part of the map? Northern part has high relief and comprises of hills. Southern part has low relief and comprises of plains. SN Kansagra School / Department of Geography / Std 10 2008-09 5
Question 9 (To be answered using toposheet 45 D/10, Grid reference 17 to 26) 1. Describe the nature of Sukli Nadi. Sukli Nadi is narrow, dry and has little sediment. It flows westward and has no broken banks. 2. List three occupations followed by people in grid square 1923. Support your answer with evidence from the map. The occupations followed by people in grid square 1923 are a. Agriculture presence of yellow colour b. Public services presence of post office and dispensary c. Trade radial settlemet pattern 3. State three evidences that the area gets seasonal rainfall. Evidences which indicate that the area receives seasonal rainfall are dry rivers and tanks, wells, canals and open scrub. 4. List two reasons why has grid square 2221 been chosen as the location for the dam. The dam is located in grid square as this is at the base of the hilly area. Hence the river will have more water. Besides the dam can be easily accessed by people in the area. 5. What is the difference between the relief in the north and south east of the area? The northern part is a plain / has low relief and consists of a few scattered hills. The south-eastern part has high relief and comprises of hills whose average height is 400 metres. Question 10 (To be answered using toposheet 45 D/10, Grid reference 01 to 10) 1. Describe the nature of Sipu Nadi. Sipu River is broad, consists of a lot of sediment which indicates that it is in the middle course. It flow through broken ground at a few places in the south west direction. Sukli Nadi is its major tributary. 2. List two occupations followed by people in the north east corner of the map. Support your answer with evidence from the map. Two occupations followed by people in the map are a. Agriculture indicated by yellow colour b. Construction / brick making / Limestone quarrying brick kiln, limestone quarry 3. What is the meaning of black broken line along the river in 0609? Describe how this feature is formed. SN Kansagra School / Department of Geography / Std 10 2008-09 6
The black lines indicate broken ground. This feature is caused due to gully erosion along the river banks. This happen when long dry spells are followed by sudden downpour. This indicates that the area has seasonal rainfall / alternate wet and dry spells. 4. What is the difference between the slope between the northern and the southern part of the map? Northern part has a gentle southward slope while the southern part has a steeper (concave) slope towards the north-west. 5. Compare the relief of the south east corner of the map with the remaining part of the map. The south-eastern part has high relief as indicated by hills of average height 300-350 metres while the other part has a low relief as it is a flat plain Question 11 (To be answered using toposheet 45 D/10, Grid reference 09 to 18) 1. Describe the nature of Devangan Nadi. Devangan Nadi is dry and has some sediment. Wherever it is broad, it flows through broken ground. It flows towards the WNW direction. Its meandering nature indicates that it is in its middle course. 2. List two occupations followed by people in the plains found in the map. Support your answer with evidence from the map. Agriculture yellow colour; cattle rearing cart tracks, tanks, yellow colour 3. Describe the climate of the region in the map along with suitable evidences from the map. The area has a tropical monsoon kind of climate with seasonal rainfall. This can be said because of the presence of dry rivers, broken ground and open scrub. 4. What is the general slope of the map? Give reasons for your answer. The slope of the area is towards north-west. This can be said because there is a hilly region in the south east and the rivers flow towards the NW direction. 5. Compare the relief of the south east corner of the map with the remaining part of the map. The area in the south east is mainly a hilly region and has a high relief with hills rising about 550 metres above sea level. The remaining part of the map is a flat plain and has a low relief. SN Kansagra School / Department of Geography / Std 10 2008-09 7
Question 12 (To be answered using toposheet 45 D/10, Grid reference 18 to 26) 1. In which course of river development are the rivers of the area? Give reasons for your answer. Upper course; this can be said as they are narrow, have less water and flow through a hilly region. 2. What can you infer if the contours are overlapping on each other? Which feature do you find in the map which befits the description stated by you? If contours overlap each other, the conclusion that can be drawn is that the slope is vertical. The feature that befits this description is the waterfall in grid square 2307. 3. List two main occupations followed by people in Abu. Support your answer with evidences from the map. Tourism hilly region, Nakki Talao, Delwara Temple, Sunset Point, Palanpur Palace; Education St. Mary s High School, Sophia High School 4. Describe the vegetation of the region in the map stating reason for the occurrence of this vegetation. The area has tropical deciduous type of vegetation. This would consist of date palms, berries, etc. Besides, thorny shrubs are also found. In addition, due to waterlogging at the foothills, bamboo shrubs are also found. 5. What is the difference in the slope of the northern and southern region of the map? Give reasons for your answer. The slope of the area in the northern part of the map is towards NW while the slope of the area in the southern part of the map is towards the south. This can be easily inferred from the direction in which the streams flow. 6. Describe the relief of the area. The area is a hilly region / has high relief. There are a number of features like mountains, hills, ridges, saddles etc present in the area. There are steep slopes as well as vertical slopes. There is a plain in the NW corner and the SW corner. The average height of the area is 100 metres above mean sea level while the highest point is 1426 metres above sea level. SN Kansagra School / Department of Geography / Std 10 2008-09 8