Drought monitoring

The study "Drought monitoring using MODIS data and the Google Earth Engine platform, case study in Dak Lak province" was conducted to monitor drought conditions in Dak Lak province using satellite data and the GEE platform. Various drought indicators, such as the Vegetation Health Index (VHI) and the Normalized Differential Drought Index (NDDI), were obtained from multi-time MODIS satellite data and used to analyze the spatial and temporal distribution of dry conditions in Dak Lak province during the period from 2001 to 2020.

8p tukhauquantuong1011 22-04-2024 4 3   Download

The prolonged drought due to climate change has significantly affected the agricultural production of rural communities in the mountainous and plain areas of Vietnam. We use the standardized precipitation index (SPI) combined with Geographical Information Systems (GIS) and Remote Sensing (RS) to simulate and forecast the impacts of drought on agricultural land use in Bac Tra My district, Quang Nam province, in the study.

17p vispiderman 15-06-2023 7 2   Download

This study has implemented an index-based approach for monitoring the droughts in the Vu Gia – Thu Bon river basin using remote sensing data and the Google Earth Engine cloud computing service. Landsat series remotely sensed data had been used effectively for the time-series calculation of the indices related to the drought hazard

16p vinebula 02-06-2023 4 3   Download

The report briefly presents Tra Vinh province's location, water resources (underground water and exploitation status, surface water, rainwater), drought in 2016 and damage. By direct measurement methods, the study of monitoring data, isotope hydrological techniques, GIS... the authors have assessed the evolution of saltwater intrusion into the ground aquifers qh, qp3, qp2 -3 in 2014 and 2017.

8p vistephenhawking 26-04-2022 12 1   Download

Drought is a phenomenon related to water shortage that affects various aspects of life, economy and environment. The Vietnamese Mekong Delta (VMD) of Vietnam has recently experienced more frequent extreme weather events, notably drought. Nevertheless, few studies have focused on drought monitoring in this region.

4p viwendy2711 05-10-2021 12 1   Download

Calotropis procera is a wild species that is drought-resistant and plays a number of economic and ecological uses. The species is important in soil fertility improvement, pollution control by monitoring sulphur dioxide emissions in the air and suitable indicator of exhausted soil. This study was undertaken in drylands of South Eastern Kenyato evaluate the species‟ soil ecology and ability to bioaccumulate heavy metalsThe objectives of the research were to determine the soil chemical and physical properties for survival of C. procera and to determine the ability of C.

12p chauchaungayxua12 29-07-2021 16 1   Download

In this context, the present study attempts to assess agricultural drought by using Standard Precipitation Index (SPI) and GIS techniques for monitoring the spatio-temporal extent of agricultural drought in Mewar region of Rajasthan.

11p trinhthamhodang1215 23-09-2020 17 1   Download

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.

10p koxih_kothogmih5 04-09-2020 27 1   Download

The Temperature Vegetation Dryness Index (TVDI) with the combination of LST and NDVI index, was used as an indicator for drought risk assessment in Cu Chi District in 2005, 2010, 2015, and 2020. The results show a significant increase in dry areas between 2005- 2010 and 2015-2020. On the other hand, the results of the TVDI index and mapping drought of Cu Chi district on February 13, 2005, February 11, 2010, January 24, 2015 and February 23, 2020 are a basis for risk assessment and drought monitoring.

12p quenchua5 14-05-2020 9 1   Download

The present study deals with the potential of using precipitation-based Standardized Precipitation Index to analyse the temporal pattern of drought in South Kashmir area of Jammu and Kashmir. Monthly precipitation data from 1980 to 2017 for Anantnag region were used to compute Standardized Precipitation Index (SPI) values. The computation of SPI series was done for short, intermediate as well as for long time scales. Analysis of SPI values were done to study the temporal patterns of drought occurrence. The drought severity and duration were also estimated.

11p trinhthamhodang4 22-03-2020 13 1   Download

Meteorological drought is a natural hazard that can occur under all climatic regimes. Monitoring the drought is a vital and important part of predicting and analyzing drought impacts. In the present study, monthly time series of rainfall data (1980–2016) from five stations were used to derive SPI, particularly at 3-month time scales. This 3-month SPI was interpolated to depict temporal patterns of meteorological drought and its severity during 2014 and 2016 years. SPI was more efficient than departure in spatial analysis of drought.

8p chauchaungayxua3 07-02-2020 16 0   Download

Agricultural drought is a natural hazard that characterized by shortage of water supply. In recent decades, the scientists usually deal with phrases Agricultural drought monitoring as an essential component of drought risk management and using remote sensing (RS) and Geography Information System (GIS) based on drought indicators, proposed and widely used in the field of drought monitoring. This paper presents some agricultural drought indicators to generate a suite of drought levels at monthly, seasonal, and annual time scales for the North Central regions, Vietnam.

10p chauchaungayxua2 04-01-2020 20 1   Download

Remote sensing has several advantages in the field of agronomical research purpose. The assessment of agricultural crop canopies has provided valuable insights in the agronomic parameters. Remote sensing play a significant role in crop classification, crop monitoring and yield assessment. The use of remote sensing is necessary in the field of agronomical research purpose because they are highly vulnerable to variation in soil, climate and other physico- chemical changes.

14p nguaconbaynhay1 04-12-2019 27 2   Download

Objectives of research: 1) To explore mechanism of the seasonal moisture transport in Vietnam. 2) To determine the relationship between the moisture transport and the ENSO event, especially in ENSO years which heavy rainfall or severe drought occurred in Vietnam. 3) To propose the application of the moisture transport information for monitoring droughts (during El Niño) and heavy rainfall (during La Niña) over Vietnam.

29p change00 04-05-2016 28 2   Download

Jim Gahan is a Chartered Surveyor with over 35 years experience, in both the public and private sectors. He has previously held the positions of Deputy Chief Valuer, Dublin City Council; Commercia Director, Custom House Docks Development Authority; Group Property Manager, CIE and Property Investment Director, Cosgrave Property Group. He now works as an independent Property Consultant. He was Chairman of the Society of Chartered Surveyors in 1989 and has been Chairman of the Education Board of The Society of Chartered Surveyors for the past 20 years.

12p docvachiase 03-05-2013 38 2   Download

The EU Water Framework Directive (2000/60/EC) is probably the most significant legislative instrument in the water field that was introduced on an international basis for many years. It moves towards integrated environmental management with key objectives to prevent any further deterioration of water bodies, and protect and enhance the status of aquatic ecosystems and associated wetlands. It aims to promote sustainable water consumption and will contribute to mitigating the effects of floods and droughts.

487p phoebe75 01-02-2013 63 11   Download

Microalgae are prokaryotic or eukaryotic photosynthetic microorganisms that can grow rapidly and live in a wide range of ecosystems extending from terrestrial to aquatic environment. Environmental factors such as temperature, UV-light, irradiance, drought and salinity are known to affect their photosynthesis. Photosynthesis was the most sensitive process in microalgae, leading to numerous changes in structure and function of the photosynthetic apparatus under various conditions.

412p conquynho32 15-09-2012 73 10   Download