Tamil Nadu Agricultural University 2008 B.E FINAL THEORY - Question Paper

TAMILNADU AGRICULTURAL UNIVERSITY
B.Tech (Ag.Engineering) Degree Programme
Final theory examination-november-2008
Year-iii
Semester-v (2006 syllabus)
SWC.C22 Watershed management(2+1)
PART-A
(ANSWER ALL THE QUESTION) 10X.5=5
Fill in the blanks
A.1. In rainfall erosivity , I30 is the ………………………..30 min rainfall intensity of the storm.
A.2. in areas of medium to high rainfalls with soils of medium to low soil moisture retention capacity ………is unavoidable.
A.3. Watershed management is the development of …………………….and ………………of watershed.
A.4. Diversion ditches are constructed for …………………. And …………………….of runoff.
A.5. Water harevesting in the field soil is done by ……………..
State the actual or false with justification.
A.6. chute spillway are generally used at drops of 3-6 m.
A.7. coarse sand soil has high transportability.
A.8. Water harvesting primarily means harvesting water from drains.
A.9. Planting pastures can increase the yield of water from a watershed.
A.10. strip cropping has alternate rows of rows crops and close growing crops.
PART-B
(ANSWER ALL QUESTIONS) 10X .5=5
MATCH THE subsequent
B.1. watershed a) Drainage basin
B.2. pond b) earth embankments
B.3. wind erosion c)shelter belts
B.4. temporary gully controls d)woven wire dams
B.5. permanent gully control e) Drop spillway
f)wires
g)contouring
h)rain drop
select THE accurate ans
B.6 land capability classiii can be farmed with conservation measures that are
a) intensive b) moderate
c)below moderate d) insignificant
B.7. At drops of 3-4m, which of the subsequent structure is recommended?
a) pipe spillway b)drop spillway
c)chute spillway d) temporary check dams
B.8. The line seepage in an earth embankment is also called
a) runoff line b)lowermost flow line
c)phreatic line d)water pressure line
B.9. contour farmin is recommended for lands with slope range of
a) 0-1% b) 2-7%
c) 7-12% d)12-24&
B.10. water harvesting implies stroing wate in
a)reservoirs b)rivers
c)soil d) Both a and c
PART-C 5X3=15
(ANSWER ANY 5 ONLY)
WRITE SHORT NOTES ON
C.1 factors affecting runoff
C.2. describe the functions of various components of straight drop spillway.
C.3 define water harvesting and express the basic relationship for the design of storage structure.
C.4. water conservation practices in irrigated lands
C.5. what is meant by gully plugging? Which are the structures used for temporary gully control?
C.6. write a note on preparation of watershed development plan.
PART-D
(ANSWER ANY TWO) 2X7.5=15
D.1 give a detailed account on permanent gully control structures
D.2. define hill area development programme, its objective s and area of operation.
D.3. detail on the role of NGO’S in watershed development.

Earning:   Approval pending.