INVESTIGATING WATER SURFACE TEMPERATURE AT SHRIMP FARMS IN QUYNH LUU DISTRICT, NGHE AN PROVINCE BY USING REMOTELY SENSED DATA IN GOOGLE EARTH ENGINE

Abstract

Temperature is a fundamental environmental element of all aquatic ecosystems, including aquaculture ponds. However, the availability of in situ water temperature data typically only represent a small portion of shrimp farms’ thermal profile, and this often leads to limitation in investigating impacts of global warming and climate change on shrimp farming. For this aim, satellite-derived water surface temperature (WST) at shrimp farms in Quynh Luu district, Nghe An province, Vietnam were investigated using Landsat data in Google Earth Engine. Results showed that there was a seasonal variation of WST at shrimp farms, with monthly mean WST ranged from 21.8^oC (December) to 30.7^oC (July). Annual WST at shrimp farms in Quynh Luu district showed an increasing trend from 2000 to 2022. A remarkable warming trend of WST was detected during shrimp farming season (often from April to October each year) and this may lead to high risk for shrimp farms there. Findings of this study indicate that greater awareness of shifts in WST regime at shrimp farms is required if this activity is to be sustainable under climate change.