Study the map extract on a scale of 1:50,000 and answer the following questions
(a) On the map extract:
(I) Print the letters shown in the brackets below on one example of each of the following features: Conical Peak (CP) Narrow River Valley (NRV) Even Slope (ES)
(b) Calculate the gradient of the minor road from the road junction in Sabongidda to the Church in Aviosi
(c) Describe the location and functions of uhomora
Explanation
(a)(i) Both area above 750ft are located on
(i) North Eastern and North western part of the map.
(ii) The three features can be located in
(a) Conical peak (CP) North East.
(b) Narrow River Valley (NRV) (South West)
(c) Even slope (Eastern part)
(b) The gradient of the minor road from the road junction in Sabongida to the Church in Aviosi.
Height of road at Sabongida junction = 250ft.
Height of road at the Church in Aviosi 675ft.
Vertical Interval = 675 – 250ft = 425ft (diff. in height)
Horizontal equivalent = 5.9″ or 14.75 cm (Distance by road)
Scale of Map = 1.25″ to 1 mile or 1:50,000.
Therefore 5.9″ = 5.9 4- 1.25 miles = 4.7 miles or 14.75 x 0.5 = 7.375km.
Gradient = Vertical Interval
Horizontal equivalent
= 425ft or 425 x 12 x 2.5 – = 12,750
4.7 miles 7.375 x 100,000 737,500
1 mile = 5280ft
= 425ft or 12,750
4.7 x 5280ft 737,500
= 425 or 12,750
24816 737,500
1 = 1 or 1:58(1 in 58)
58 58
(c) Location and function of Uhomora: Located on the spur between two tributaries of River Onwan, on a level ground between 250ft and 300ft above sea level. Uhomora is a nodal town which is a meeting point of two minor roads. In term of function it provides medical services because of the presence of hospital and dispensary. It equally performs educational functions because of the presence of schools. Uhomora is located between two tributaries and functions as a religious centre because of the presence of churches. It is located in the South East where the presence of spurs are noticeable.