نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه آبخیزداری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران.
2 گروه مهندسی آبخیزداری دانشکده منابع طبیعی دانشگاه تربیت مدرس
3 گروه مهندسی و مدیریت آب، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Climate change has greatly challenged the management of water resources by affecting the water needs of crops. In this research, the effect of climate change on the water requirement of the rice crops was simulated in the study area of the Tajen watershed and its changes until 2060 were studied. Lars-WG software and HadGEM2 model outputs under climate scenarios (RCP 2.6) and (RCP 8.5) have been used to investigate climate change. To evaluate the impact of climate change in the next 40 years on water demand, using CROPWAT 8.0 software, the amount of potential and actual evapotranspiration and effective rainfall for the future period was calculated and the water demand of the crop was determined and compared with the water demand of the current period. took The results showed that the average water requirement of rice in the RCP 2.6 scenario in 2021-2040 and 2041-2060 is equal to 658.27 and 658.46 mm, respectively, and in RCP 8.5 scenario in 2021-2040 and 2041-2060, It is expected to be 672.93 and 673 mm, respectively. Therefore, according to both climate scenarios, the water requirement has increased in all time periods compared to the historical period, which is about 648 mm. Climate change by affecting the amount of evaporation and transpiration and effective rainfall causes the increasing trend of rice water requirement in both climate scenarios in the future period (2060-2021). The increase in water demand in future period (2041-2060) compared to the near future time period (2021-2040) is more than the historical period.
کلیدواژه‌ها [English]
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