The document analyzes the water footprints of rice crops at the Madurai station, calculating blue, green, and grey water footprints using CropWat and ClimWat apps. It reports a paddy yield of 2.71 t/ha with a total green water footprint of 5.04 m3/ha, blue water footprint of 2.30 m3/ha, and a grey water footprint of 96.77 m3/ha. Overall, the green, blue, and grey water footprints per ton of paddy yield are summarized as 7.75 m3/ton, 5.01 m3/ton, and 99.48 m3/ton, respectively.

1. Water Footprints for
Rice crop
KAAVIYAAV
AGRI -
INFORMATICS

2. OBJECTIVE
• The main aim of this
assignment is to find the
Blue, green and grey Water
footprints of Rice crop.
• It’s done by Cropwat and
Climwat app.
• Rice crop grown in Madurai
station was taken.

4. • Effective Rainfall available = 700
• USDA S.C Method was used.

9. • ETc = 754.2 mm/dec = 0.7542 m/decade = 0.21mm/day
• ETo = 4.80 mm/day
• Eff rain = 125.6 mm/dec = 0.1256 m/dec = 0.03mm/day
• Irr.Req = 846.8 mm/dec = 0.8468m/dec = 0.23mm/day
• Paddy yield = 2705 Kg/ha = 2.71 t/ha
• Eff+ETo+ETc = (0.03+4.80+0.21)mm/day = 5.04m3/ha = Total Green
water foot print
• Irr.Req = 0.23mm/day = 2.300000000000000003m3/ha = Total Blue
Water foot print
• Application of Nitrate = 480 tones
• Permissible limit of Nitrate = 4.9604t/m3
• Total Grey Water footprint = 96.7741935484m3/ha

10. We Know that,
Paddy yield = 2.71 t/ha
Total Green water foot print=5.04m3/ha
Total Blue Water FP=
2.300000000000000003m3/ha
Total Grey Water footprint =
96.7741935484m3/ha
By adding the Paddy Yield we can conclude that
Green water foot print=7.75m3/ton
Blue water foot print =5.01m3/ton
Grey water foot print = 99.48m3/ton