Construction Technology – Irrigation Technology I – NVQ 5 - Semester 1
Assignment 01 – End Submission Day – 19/11/2022
Assignment 01
Question 01
The following hydro-data are for a village irrigation tank (Minor Tank) in the dry
zone.
Contour Level (m above
MSL)
Water Spread area (ha)
i.
ii.
iii.
100
101
102
103
104
105
106
107
108
1.5
2.8
5.6
10.6
22.6
40.0
78.0
120.0
180.0
- Gross Catchment area - 21km2
- Net Catchment area - 15km2
- Irrigation Water requirement (Maha)
- 160 ha.m
- Irrigation water requirement (Yala)- 210ha.m
- Co-ordinates
- F/15 (2.5 x 6.0)
- Sill level of the sluice
- 102.4 m above MSL
Plot Area Capacity diagram (Select proper scales).
Dead storage of the tank.
Find the total yield separately for the two seasons.
(10 Marks)
(05 Marks)
(10 Marks)
Assignment 02
i.
ii.
iii.
iv.
v.
vi.
Give the brief introduction of “Weather patterns of Sri Lanka”. (20 Marks)
Explain the following terms
a. Anicut
(10 Marks)
b. Drip Irrigation System
(10 Marks)
c. Sprinkler Irrigation System
(10 Marks)
Mention four (04) advantages and disadvantages of drip Irrigation System?
(10 Marks)
Mention four (04) advantages and disadvantages of Sprinkler irrigation
system
(10 Marks)
Draw a Typical cross section of a “Earth Dam”.
(15 Marks)
Draw a Typical cross section of a “Spill way”.
(15 Marks)