Impact of Climate Change on Irrigation Water Requirement for Hsinchu Irrigation Area

• Main Authors: Cheng-Shan Mao, 毛承善
• Other Authors: Wen-Cheng Huang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/76451022928773405450

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 101 === The aim of this research is to investigate the impact of irrigation water on climate change at cultivation area of Hsinchu Irrigation Association (HIA) in northern Taiwan. The meteorological data in 2046-2065 are from five downscaled A1B GCMs (CCCma_CGCm3, CNRM_Cm3, CSIRO_Mk3.0, GFDL_Cm2.0 and LASG_FGOALS-g1.0). The bias of future evapotranspiration would be corrected by quadrant transformation method (QTM). Then we use a water balance model of paddy field to evaluate rice crop water requirements, effective rainfall and irrigation water in the future. Projections are compared with the present in 2008-2011. The results show climate change would lead rainfall and temperature both to rise. In the future, the crop water requirement at the first and second cropping season will increase 667mm(34.6%) and 819mm(46.3%), respectively. However, the effective rainfall will increase 88mm at the first cropping season and 210mm at the second. The future planning irrigation water requirement based on a 5-yr irrigation demand at the first cropping season would increase 111mm (5.9%) and decrease 102mm (4.2%) at the second cropping season.