University of Tabriz Journal of Hydrogeomorphology 2383-3254 12 45 2025 12 22 Moisture stress and drought monitoring based on correlation analysis between spectral indices based on humidity, vegetation cover and temperature in Shadgan Wetland Moisture stress and drought monitoring based on correlation analysis between spectral indices based on humidity, vegetation cover and temperature in Shadgan Wetland 19 1 18048 10.22034/hyd.2024.60376.1727 FA Mehdi Feyzolahpour Associate Professor, Geomorphology, University of Zanjan Journal Article 2024 02 01 Climate change is one of the most important challenges facing the world. It is predicted that climate change will cause changes in climate patterns and increase the frequency of extreme weather events. One of these climate aggravation phenomena is drought. It is estimated that 55 million people are affected by drought every year. Drought occurs slowly and develops gradually. This makes it difficult to determine when it starts and ends. The onset and development of the drought was subtle and slow, but the residual effects are devastating. Lack of water, destruction of the environment, loss of agricultural production, negative impact on human health, hunger and food crises are among the consequences of drought. Drought is a relative situation and should be interpreted separately in each region. Each drought is different in terms of intensity, duration and spatial extent. Drought is defined as a recurring and avoidable phenomenon that is characterized by a lack of rainfall and a lack of water needed by humans Drought can also be defined as a period of unexpectedly dry weather in which a lack of rainfall causes a hydrological imbalance. Climate change is one of the most important challenges facing the world. It is predicted that climate change will cause changes in climate patterns and increase the frequency of extreme weather events. One of these climate aggravation phenomena is drought. It is estimated that 55 million people are affected by drought every year. Drought occurs slowly and develops gradually. This makes it difficult to determine when it starts and ends. The onset and development of the drought was subtle and slow, but the residual effects are devastating. Lack of water, destruction of the environment, loss of agricultural production, negative impact on human health, hunger and food crises are among the consequences of drought. Drought is a relative situation and should be interpreted separately in each region. Each drought is different in terms of intensity, duration and spatial extent. Drought is defined as a recurring and avoidable phenomenon that is characterized by a lack of rainfall and a lack of water needed by humans Drought can also be defined as a period of unexpectedly dry weather in which a lack of rainfall causes a hydrological imbalance. https://hyd.tabrizu.ac.ir/article_18048_dd1a4efd4937f4fa532db62edfb19a0c.pdf