The study shows that though the soil moisture will decrease and daily evapotranspiration will increase, there will be no major change in total irrigation water requirement due to the shortening of growing length and increase of precipitation.
However, the climate change will increase the irrigation rate or daily use of water for irrigation. In base years, an average of 1,057 mm water is used for irrigation for the time period of 125 days.
In 2025, an average of 1,059 mm water will be used for irrigation in 121 days.
Consequently the irrigation rate will be increased.
The increase of irrigation rate in twenty-first century in the study area is shown by a graph in Fig. 12.
The irrigation rate in the base years is 8.5 mm/day. It will be about 8.8 mm/day in 2025, 8.9 mm/day in 2050, 9.1 mm/day in 2075 and 9.3 mm/day in 2100.
The study shows that though the soil moisture will decrease and daily evapotranspiration will increase, there will be no major change in total irrigation water requirement due to the shortening of growing length and increase of precipitation.However, the climate change will increase the irrigation rate or daily use of water for irrigation. In base years, an average of 1,057 mm water is used for irrigation for the time period of 125 days. In 2025, an average of 1,059 mm water will be used for irrigation in 121 days.Consequently the irrigation rate will be increased. The increase of irrigation rate in twenty-first century in the study area is shown by a graph in Fig. 12. The irrigation rate in the base years is 8.5 mm/day. It will be about 8.8 mm/day in 2025, 8.9 mm/day in 2050, 9.1 mm/day in 2075 and 9.3 mm/day in 2100.
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