This study explored the possible variations in crop evapotranspiration (ET<sub>c</sub>) and irrigation water requirement (IWR) for wheat-rice cropping system of Upper Chenab Canal (UCC) in Punjab province of Pakistan. First, most influenti...
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https://www.riss.kr/link?id=A105335320
2016
Korean
학술저널
44-44(1쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
This study explored the possible variations in crop evapotranspiration (ET<sub>c</sub>) and irrigation water requirement (IWR) for wheat-rice cropping system of Upper Chenab Canal (UCC) in Punjab province of Pakistan. First, most influenti...
This study explored the possible variations in crop evapotranspiration (ET<sub>c</sub>) and irrigation water requirement (IWR) for wheat-rice cropping system of Upper Chenab Canal (UCC) in Punjab province of Pakistan. First, most influential climatic variable responsible for variation in reference evapotranspiration (ET<sub>o</sub>) was determined by conducting a sensitivity analysis. A 32 year (1980-2012) weather data set obtained from Pakistan Meterological Department was used for the analysis. Temperature was found to be the most influential climatic variable for ET<sub>o</sub> variations. Hypothetical future scenarios were then designed based on temperature rise of 1-3℃ with 1℃ interval and rainfall variations based on 80%, 50% and 20% probability of occurence ( dry, normal and wet). CROPWAT model was used to simulate the ET<sub>c</sub> and IWR under average and scenario based climatic conditions. Average ET<sub>c</sub> for wheat and rice were 342 mm and 580 mm. Results showed that as a result of temperature rise, ET<sub>c</sub> for both crops would increase in the range of 2.31%-7.50%. At +3℃ temperature rise, wheat showed 7.5% and rice showed 7% increase in ET<sub>c</sub> as compared to average values. Results also showed that under dry rainfall conditions IWR could rise up to 31% and 34% for wheat and rice. Monthly analysis showed that March & April and August & September were the months with maximum IWR for wheat and rice respectively.