07.03.2014 Views

economics of on-farm development - Institute for Social and ...

economics of on-farm development - Institute for Social and ...

economics of on-farm development - Institute for Social and ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

The pattern <str<strong>on</strong>g>of</str<strong>on</strong>g> actual m<strong>on</strong>thly requirement 26 <str<strong>on</strong>g>of</str<strong>on</strong>g> irrigati<strong>on</strong> water in the<br />

Kallada comm<strong>and</strong> area based <strong>on</strong> the Joint Report <str<strong>on</strong>g>of</str<strong>on</strong>g> the Project Planning <strong>and</strong><br />

M<strong>on</strong>itoring (PPM) cell <strong>and</strong> the Departments <str<strong>on</strong>g>of</str<strong>on</strong>g> Agriculture <strong>and</strong> Co-operati<strong>on</strong> has<br />

been given in Table 7.21.<br />

It shows that the water requirement varies across crops <strong>and</strong> seas<strong>on</strong>s. For<br />

instance, the max~mum water dem<strong>and</strong> <strong>for</strong> dry crops is in the m<strong>on</strong>th <str<strong>on</strong>g>of</str<strong>on</strong>g> March,<br />

whereas, that <strong>for</strong> wet crops, it is in the m<strong>on</strong>th <str<strong>on</strong>g>of</str<strong>on</strong>g> December. In other words, it<br />

implies that the opening <str<strong>on</strong>g>of</str<strong>on</strong>g> the canal <strong>for</strong> irrigating dry crops during the m<strong>on</strong>ths<br />

<str<strong>on</strong>g>of</str<strong>on</strong>g> January to March, may cause crop damage in the wet l<strong>and</strong>, because <str<strong>on</strong>g>of</str<strong>on</strong>g> the<br />

water logging problems caused by the canal seepage. It is important to note that<br />

during the six m<strong>on</strong>ths period from January till June (start <str<strong>on</strong>g>of</str<strong>on</strong>g> m<strong>on</strong>so<strong>on</strong>) the water<br />

requirement is the highest <strong>for</strong> the dry crops compared to rest <str<strong>on</strong>g>of</str<strong>on</strong>g> the m<strong>on</strong>ths when<br />

irrigati<strong>on</strong> requirement is very high <strong>for</strong> wet crops, mainly paddy.<br />

However, no canal operati<strong>on</strong>al plans are prepared in advance to supply<br />

<strong>and</strong> regulate water according to the requirements in different seas<strong>on</strong>s. Moreover,<br />

as the existing MCS infrastructure is almost defunct, release <str<strong>on</strong>g>of</str<strong>on</strong>g> water <strong>for</strong> dry<br />

crops is out <str<strong>on</strong>g>of</str<strong>on</strong>g> questi<strong>on</strong>.<br />

26 The crop water requirements have been computed <strong>for</strong>tnightly <strong>for</strong> the projected<br />

cropping pattern. For computing the field irrigati<strong>on</strong> requirement <str<strong>on</strong>g>of</str<strong>on</strong>g> paddy percolati<strong>on</strong><br />

rate <str<strong>on</strong>g>of</str<strong>on</strong>g> 6.5 mm / day, 7 mm / day <strong>and</strong> 10 mm / day have been taken <strong>for</strong> loam soil <strong>for</strong><br />

Kharif, Rabi <strong>and</strong> summer seas<strong>on</strong>s respectively. The overall efficiency <str<strong>on</strong>g>of</str<strong>on</strong>g> 75 per cent<br />

has been taken <strong>for</strong> arriving at the irrigati<strong>on</strong> requirements at the canal head assuming 84<br />

per cent c<strong>on</strong>veyance efficiency (the entire distributi<strong>on</strong> system being lined) <strong>and</strong> field<br />

efficiency <str<strong>on</strong>g>of</str<strong>on</strong>g> 90 per cent. Since the system is lined <strong>and</strong> improved system <str<strong>on</strong>g>of</str<strong>on</strong>g> <strong>on</strong>-<strong>farm</strong><br />

c<strong>on</strong>veyance <str<strong>on</strong>g>of</str<strong>on</strong>g> water distributi<strong>on</strong> (through MCS) is effected <strong>and</strong> because <str<strong>on</strong>g>of</str<strong>on</strong>g> the<br />

319

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!