tailieunhanh - Drought risk assessment during the dry season in Tien river estuary (HNUE Journal Of Science)

In this study, the author assessed the risk of drought at Tien river estuary through two indices: Normalize Difference Vegetation Index (NDVI) and Standardized Precipitation Index (SPI) during the dry season months of 1991, 2001, 2010 and 2018. SPI values are interpolated to construct spatial modeling of meteorological drought levels. | HNUE JOURNAL OF SCIENCE DOI Natural Sciences 2020 Volume 65 Issue 6 pp. 191-200 This paper is available online at http DROUGHT RISK ASSESSMENT DURING THE DRY SEASON IN TIEN RIVER ESTUARY Dao Ngoc Hung and Nguyen Thanh Luan Faculty of Geography Hanoi National University of Education Abstract. Drought simply is a period of moisture deficiency. It depends on temperature evaporation capacity vegetation cover topography etc. in addition it often happens on a large scale making it difficult to use traditional research methods. With the development and widespread application of remote sensing technology and geographic information systems GIS the use of satellite images as well as GIS software is becoming more and more effective in monitoring monitoring and assessing drought. In this study the author assessed the risk of drought at Tien river estuary through two indices Normalize Difference Vegetation Index NDVI and Standardized Precipitation Index SPI during the dry season months of 1991 2001 2010 and 2018. SPI values are interpolated to construct spatial modeling of meteorological drought levels. Through the LANDSAT satellite image NDVI is calculated and built on a map of drought levels. Weighted overlay SPI and NDVI map layers for a drought risk map. Research results have shown that the Tien river estuary area is divided into 2 zones light drought and moderate drought occurs in the dry season. Drought occurred with strong intensity in the eastern coastal area of Ben Tre and Tra Vinh provinces the deeper the inland the level of drought decreased. Keywords drought index NDVI SPI risk assessment Tien river estuary. 1. Introduction Drought together with climate change is one of the prominent global issues so many authors in the world have studied drought research. But this is inherently severe natural phenomena with high complexity so far there is no general method to study the problems of drought. However it is now common in .

• Môi trường
• Drought index
• Risk assessment
• Tien river estuary
• Drought risk assessment
• Dry season
• Tien river estuary
• Drought intensity
• Drought magnitude
• Effective drought index and ArcGIS
• Meteorological drought
• Assessment of meteorological drought
• Drought severity
• Effective drought index
• Meteorological drought characterization
• According to EDI
• Agricultural drought
• Agricultural rezoning
• Palmer index
• Agricultural drought rezoning
• Selecting drought index
• Drought indices
• Standardized precipitation index
• Reconnaissance drought index
• RDI meteorological drought indices
• Rainfall departure
• Relative departure index
• Meteorological drought characteristics
• Analysis of drought occurrences categorise
• Meteorological drought trends
• Drought assessment
• Normalized difference vegetation index
• Vegetation index
• Based on remote sensing data
• Drought reconnaissance index
• Climate change
• Climate change context
• Ped index
• Scenarios of meteorological drought
• Drought monitoring
• Temporal pattern
• Drought intensity assessment
• SPI series was done
• Post anthesis drought
• Drought susceptibility index
• Biochemical responses of soybean
• Post anthesis drought stress
• Biochemical responses
• Hydro climatological drought conditions
• Using high resolution model simulation
• Coupled WEHY HCM model
• Streamflow drought index
• Rajasthan wster resource department
• Drought characterization
• Magnitudes of drought
• Rainfall data and SPI tool
• Relative yield
• Indian mustard
• Drought stress response of Indian mustard
• Indian mustard (Brassica juncea L
• Stress tolerant index
• PGRs on seed germination
• Catalase activity in tomato
• Tomato under drought
• Tomato in early growth stage
• Seed vigor index
• Early drought
• Membrane stability
• Characterize genetic resources
• Breeding programs
• Agronomic traits
• Drought stress
• Grain yield
• Photosynthetic efficiency
• Stability index
• Winter wheat cultivar
• Ctenanthe setosa
• Enzyme activity
• Leaf rolling index
• Leaf water potential
• Long term drought stress
• Relative water content
• Arid index
• Propose suitable adaptive solutions
• Meteorological data
• Bài báo khoa học
• Bài viết nghiên cứu khoa học
• Báo cáo lâm nghiệp hay
• cách trình bày báo cáo
• báo cáo lâm nghiệp
• công trình nghiên cứu lâm nghiệp
• tài liệu về lâm nghiệp
• quality assured generic
• medicines and promoting
• appropriate actions
• Drought Environments
• Response Crosstalk
• Reactive Oxygen
• Durum wheat
• Superoxide dismutases
• Oxygen inactivate enzymes
• Chlorophyll content index
• Reactive oxygen species
• Red River Delta
• Intergovernmental Panel on Climate Change
• Socio economic
• Water resources
• Hydroelectric power generation
• Osmotic stress
• PEG 6000
• Promptness index
• Association analysis
• Seedling stage traits in Maize