Portal de Periódicos da CAPES

Đánh giá tác động của xâm nhập mặn do biến đổi khí hậu trên hiện trạng canh tác lúa tại tỉnh Sóc Trăng

2017; Volume: Môi trường 2017; Linguagem: Inglês

10.22144/ctu.jsi.2017.062

2815-5599

Nguyễn Thị Hồng Điệp, Danh Huội, Cần Trọng Nguyễn,

Geochemistry and Geologic Mapping

Soc Trang is one of the coastal provinces, where rice cultivation provides the most important production in the Mekong Delta. However, saline intrusion under climate change impact becomes a big issue which affects rice cultivation in Soc Trang. This research was aimed to evaluate the impact of climate change, specifically saline intrusion on rice cultivation areas in Soc Trang following two climate change scenarios in 2004 and 2030. In this research, time series vegetation index based MODIS data (MOD09Q1) with 250 m of spatial resolution from 31st July 2014 to 31st July 2015 combined with LANDSAT 8 was used to map the rice cropping systems in Soc Trang. The results showed that there were three main rice crops system including triple rice crop (99,182.2 ha, accounting for 30.3% total area), double rice crop (69,484.2 ha, accounting for 21.2% total area) and rice-shrimp rotation crop (69,484.2 ha, accounting for 4.3% total area). The overall accuracy of classification was calculated by using 100 sites of field survey, result of Kappa coefficient was 78%. The impact of saline intrusion following two climate change senarios in 2004 and 2030 to rice cropping system in Soc Trang is mainly distributed to three districts including My Xuyen, Long Phu, and Tran De. By comparing scenarios of climate change in 2004 and in 2030, the affected area of rice-shrimp rotation crop in My Xuyen increased by 14.7 ha; the affected areas of double rice crop in Tran De and those of triple rice crop in Long Phu decreased by 155.5 ha and 35.5 ha, respectively.