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Which of the following statement is/are incorrect about Canal Irrigation? Canal irrigation provides safety from droughts and it brings fertile sediments to the fields. The main concentration of canal irrigation is in the southern plains. The percentage of canal irrigation area to total irrigated area in the country has fallen from about 40% in 1950-51 to less than 25% at present. Select the incorrect code from below.
1996-7 and 2002-3, the area under canal irrigation declined by 2.4 million ha (13.8 percent), the area under tank irrigation fell by 1.4 million ha (42.4 percent), and the area irrigate by all other sources declined by 1 million ha (28 percent). The only irrigation source that increased its share was groundwater wells, by 2.8 million ha (more than 9 percent) Why has such a change in irrigation demands happened? 1. Not enough supply of water from canals 2. More tubewell irrigation by farmers in the source areas of rivers 3. High cost of irrigation water, and  diversion for non-farm use 4. Joint use of water not possible due to social and economic inequalities
Which one is incorrect? 1. Kumabaram Lift Canal-Older name - Nohar Sohwa Lift Canal. 2. Kawar sen Lift Canal-Older name - Lunaksar Lift Canal. 3. Panna Lal Lift Canal - Older name - Gajner Lift canal. 4. Veer Tejaji Lift Canal-Older name - Bagdsar.
If one plots the tank irrigation in India and superimposes it with map of well irrigation, one may find that the two are negatively related. Which of the following statements explain the phenomenon? 1. Tank irrigation predates well irrigation. 2. Tank irrigation is in the areas with impervious surface layers. 3. Well irrigation requires sufficient groundwater reserves. 4. Other forms of irrigation are not available. Select the correct answer using the code given below.
If one plots the tank irrigation in India and superimposes it with map of well irrigation,one may find that the two are negatively related. Which of the following statements explain the phenomenon?1. Tank irrigation predates well irrigation.2. Tank irrigation is in the areas with impervioussurface layers.3. Well irrigation requires sufficientground water reserves.4. Other forms of irrigation are not available.Select the correct answer using the code given below.
The gross commanded area for a distributary is 6000 hectares, 80 percent of which is culturable irrigable. If the intensity of irrigation for Rabi season is 50 percent, then the area to be irrigated in Rabi season is:
The gross commanded area for a distributary is 8000 hectares, 60 percent of which is culturable irrigable. The intensity of irrigation for Rabi season is 60 percent and the corresponding average duty at the head of the distributary is 2000 hectares/cumec, find the discharge required at the head of the distributary from average demand considerations.
The gross commanded area for a distributary is 6000 hectares, 80% of which is culturable irrigable. The intensity of irrigation for Rabi season is 50% and that for Kharif season is 25%. If the average duty at the head of the distributary is 2000 hectare/cumec for Rabi season and 1000 hectares/cumec for Kharif season, find out the discharge required.
Depending upon the source from which the water is drawn, flow irrigation can be sub-divided into 1.River canal irrigation 2. Reservoir or tank irrigation 3. Combined storage and lift irrigation 4. Combined storage and diversion irrigation Which of the above designations are relevant?
Let us take the gross commanded area of a watercourse is 2000 hectares, 80% of which is culturable irrigable. Intensities of sugarcane and paddy are 30% and 50%. The duties of the crops at the head of the watercourse are 850 hectares/cumec and 1900 hectares/cumec. Find the discharge required at the head of the watercourse?