Predicting the water use-demand as a climate change adaptation strategy for rice planting crops in the Long Xuyen Quadrangle Delta

Shifting crop planting calendar as a climate change adaptation solution for rice cultivation region in the Long Xuyen Quadrilateral of Vietnam

“…According to Lee and Dang (2019c), for the three last decades, a significant change in precipitation has been recorded in the Long Xuyen Quadrilateral. Specifically, a slight upward trend in annual precipitation is recorded in the eastern and northern sub-regions, whereas a significant downward trend is found in the western and southern sub-regions, and this may be negatively impacted, leading to drought and flooding in the Long Xuyen Quadrilateral (Lee and Dang, 2019a;Kontgis et al, 2019). For example, in 2016 and 2019, the two extreme drought events in 90 and 93 yr were recorded in the Mekong Delta, resulting in a widespread irrigation water shortage and seriously hampered for rice paddies in the entire Mekong Delta (CGIAR-CCAFS SEA, 2016; Lee and Dang, 2020).…”

“…Long Xuyen Quadrilateral is one of the two major deltas in the Mekong Delta, with a total of 490 000 ha area for agriculture belonging to a part of An Giang, Kien Giang and Can Tho Provinces (Vu et al, 2018;Lee and Dang, 2019c). Yearly, this delta region provides up to 4.9 million tons of rice (Oryza sativa L.), resulting in abundant irrigation water and soil rich in nutrients (Kontgis et al, 2019;Lee and Dang, 2019a).…”

“…(Mainuddin et al, 2013;Vu et al, 2018). Therefore, the agricultural activities often face the challenges from salt intrusion due to sea level rise and waterlogging due to heavy precipitation as well as off-season precipitation, as part of climate change (CGIAR-CCAFS SEA, 2016; Deb et al, 2016;Lee and Dang, 2019a). Based on topographical conditions and precipitation distribution, the study area is divided into the two main experiment areas.…”

Study on assessing the impact of climate change (temperature and rainfall) on rice yield in the Long Xuyen Quadrangle region (LXQR) – Vietnam

“…For rice, the variation of yield and yield has a great participation of hydro-meteorological factors [4]. To estimate and evaluate the impact of hydro-meteorological factors on crop yields in general and rice in particular, the Food and Agriculture Organization (FAO) developed a CropWat model in 1990, based on temperature conditions, precipitation, sunny hours, humidity, wind speed [5][6].…”

“…Kc coefficients of rice plants in the study area[11][12]. Climate change scenarios According to the climate change scenarios of the Ministry of Natural Resources and Environment[5], the beginning of the century (2016-2035) between the century (2045-2065) and the end of the century (2080-2099) with 2 scenarios of the emission concentration medium low (RCP4.5) and high (RCP8.5)[20][21].…”