Assessing CYGNSS Satellite Soil Moisture Data for Drought Monitoring with Multiple Datasets and Indicators DOI Creative Commons
Zhaolu Hou, Zhaoxia Pu

Remote Sensing, Journal Year: 2023, Volume and Issue: 16(1), P. 116 - 116

Published: Dec. 27, 2023

Drought monitoring is crucial for various sectors, and soil moisture data play a pivotal role, especially in agricultural contexts. This study focuses on the recent CYGNSS Level 3 derived from NASA Cyclone Global Navigation Satellite System (CYGNSS), notable its wide coverage rapid revisit times, yet underexplored drought research. Spanning 1 January 2018 to 31 December 2022, this research analyzed daily data, comparing them with ERA5, SMAP, GLDAS-NOAH datasets. It was found that average standard deviation (std) of exhibited spatial patterns largely similar other datasets, although some regions showed discrepancies (std differences reached up 0.05 regions). The correlation coefficients RMSE values between datasets depended climate land cover types. Four indicators different were compared improved monthly Standardized Precipitation Evapotranspiration Index (SPEI). based demonstrate capacity describe extent intensity. certain obtained SPEI 0.27 percentage 0.16 Further investigations selected extreme cases revealed indicator relatively weak, influenced by regions, indicators. results provide insights into potential application monitoring, offering foundation future practical implementation current products.

Language: Английский

Application of machine learning and emerging remote sensing techniques in hydrology: A state-of-the-art review and current research trends DOI
Asish Saha, Subodh Chandra Pal

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 632, P. 130907 - 130907

Published: Feb. 16, 2024

Language: Английский

Citations

14
Mechanistic insights and future perspectives of drought stress management in staple crops DOI Creative Commons
Amir Khan, Yong-Feng Wang, Rasheed Akbar

et al.

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: March 27, 2025

Due to extended periods of below-normal rainfall and rising temperatures, drought is a significant global issue for agricultural productivity. Hydrological, agricultural, meteorological droughts all pose different problems with regard the availability water important crops, which in turn impacts plant development yield. Depending on crop species stage maturity, stress degrades metabolism physiological processes, resulting decreased growth yield losses that can range from 30% 90%. Acclimatization adaptation are two basic techniques plants use survive drought. Rapid alterations processes chemical composition, including modifications osmotic pressure, root leaf size, antioxidant systems, part acclimatization. Xerophytism succulence characteristics drought-resistant have evolved assist preserve cellular integrity balance water-limited environments. Even these tactics, majority crops—such as maize, rice, wheat—remain extremely vulnerable stress. To lessen effects drought, researchers looked into number strategies, both conventional cutting-edge methods. Conventional techniques, like application growth-promoting bacteria (PGPB) morphological modifications, remain essential improving resilience. Recent breakthroughs provided innovative alternatives such nanoparticle (NP) treatments biochar, enhance Biochar enhances soil moisture retention nutrient accessibility, whereas nanoparticles augment absorption bolster molecular resilience under Furthermore, microbial inoculants absorption, facilitating arid conditions. This review examines three staple emphasizing traditional novel approaches consequences We highlight how combining insights ecology, biochemistry, biology, technologies biochar boost production resistance water-scarce

Language: Английский

Citations

1
Assessing drought in Turkish basins through satellite observations DOI
Ceyhun Özçelik, Mustafa Utku Yılmaz, Kader BENLİ

et al.

International Journal of Climatology, Journal Year: 2024, Volume and Issue: 44(10), P. 3613 - 3640

Published: July 3, 2024

Abstract Drought occurs when there is a sustained decrease in rainfall over an extended period, impacting the socio‐cultural and environmental aspects of humans other living beings. The geographic distribution timing droughts play crucial role drought management mitigation strategies. Identifying predicting onset specific regions, especially watershed areas, primary concern field hydrology. This study focuses on how spatiotemporal patterns are developing Turkish Basins using detailed data Terrestrial Water Storage (TWS), precipitation, temperature at pixel level. GRACE (Gravity Recovery Climate Experiment), PERSIANN (Precipitation Estimation from Remotely Sensed Information Artificial Neural Networks), WorldClim (World Climate) sets employed to assess long‐term changes basin‐scale. Spatial analyses conducted Geographic System (GIS) environment for derivation basinal monthly mean, minimum, maximum statistics TWS, anomalies within Basins. Time series implemented investigate temporal evolution these basins, obtained. Mann–Kendall trend test Pettitt change point detection tests used statistical significance calculated trends expose existence any therein, respectively. findings indicate that Turkiye faces significant risk development nearly all its particularly after 2016. dataset provides realistic insights into behaviour hydrological droughts. effective identifying years with extreme meteorological conditions, standardized precipitation index (SPI) shows similar effectiveness, while they ineffective exposing due nature data. proves insufficient modelling basins.

Language: Английский

Citations

5
Hydro-chemical assessment of coastal groundwater aquifers for human health risk from elevated arsenic and fluoride in West Bengal, India DOI Open Access
Tanmoy Biswas, Subodh Chandra Pal, Asish Saha

et al.

Marine Pollution Bulletin, Journal Year: 2022, Volume and Issue: 186, P. 114440 - 114440

Published: Dec. 5, 2022

Language: Английский

Citations

21
The COP27 screened through the lens of global water security DOI
Marília Carvalho de Melo, Luís Filipe Sanches Fernandes,

Teresa Cristina Tarlé Pissarra

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 873, P. 162303 - 162303

Published: Feb. 18, 2023

Language: Английский

Citations

12
Drought-induced agricultural livelihood vulnerability: Livelihood-based comparative analysis in Northeast highlands of Ethiopia DOI Creative Commons
Simachew Bantigegn Wassie, Daniel Ayalew Mengistu,

Arega Bazezew Birlie

et al.

Cogent Food & Agriculture, Journal Year: 2023, Volume and Issue: 9(1)

Published: Aug. 1, 2023

The main objective of this study was to analyze drought-induced agricultural livelihood vulnerability through a comprehensive assessment agro-meteorological, biophysical, and socioeconomic variables in North Wollo. area has four zones, namely, Abay Tekeze watershed (ATW), Wollo east plain (NWEP), highland belg (NWHB), Northeast woina-dega mixed cereal (NEWMC). A total 274 sample households were selected from all the zones by considering wealth rankings. Survey questionnaire, supplemented with focus group discussions key informant interviews, used collect data. Principal component analysis applied determine indicators assign weights. Consequently, 66 32 prioritized measure exposure, sensitivity, adaptive capacity system. Both framework (LVI) sourcebook approach (LVIVSBA) assess vulnerability. results revealed that entire characterized higher exposure (0.653) sensitivity (0.632) scores drought impacts, while it exhibited lower (0.37). In both approaches, NWHB obtained highest score (0.681/0.715) followed NWEP (0.634/0.619), whilst ATW lowest (0.583/0.555) LVI LVIVSBA, respectively. Similarly, poor (0.671/0.670), medium (0.589/0.593), better-off (0.554/0.537) relatively ordered lowest. conclusion, differential does exist across groups. major sub-components which worsen household's access irrigation, food self-sufficiency problem, scarcity livestock fodder, basic infrastructure, diversification, inadequate economic resources, low educational status, lack training support. Hence, calls for decision-makers development partners develop context-specific planning interventions strengthen farmers' minimize their issue.

Language: Английский

Citations

12
Agricultural drought risk assessments: a comprehensive review of indicators, algorithms, and validation for informed adaptations DOI Creative Commons

Tien Le,

Qian Sun, Suelynn Choy

et al.

Geomatics Natural Hazards and Risk, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 2, 2024

This literature review discusses specific challenges associated with drought risk assessments (DRA) within agricultural systems, particularly concerning the justification for indicator selection, aggregation methods, and DRA-informed adaptation strategies. Employing a multifaceted approach combining quantitative qualitative we systematically reviewed existing DRA literature. The PRISMA methodology bibliometric analysis were employed to quantitatively reveal trends, key contributors, publication patterns in research, offering insights into research evolution field. Simultaneously, aspect of this involved an examination selected papers identify critical gaps. Our reveals that 67% studies lack validation their methodology, underscoring need rigorous results enhance credibility among decision-makers. Additionally, significant 88% primarily focus on identification, less emphasis strategies derived from results. Therefore, emphasize imperative bridging gap between practical applications, advocating linking findings targeted allows identification sector-specific indicators, methodologies, address unique vulnerabilities agriculture, ultimately enhancing effectiveness management efforts contexts.

Language: Английский

Citations

4
Geospatial Insights for Assessing Agricultural Drought Hazards of Rabi Season in Assam DOI

V. Senpakapriya,

Jonali Goswami,

Debashree Battacharjee

et al.

Journal of the Indian Society of Remote Sensing, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Language: Английский

Citations

0
Evaluation of IMERG precipitation product in the investigation of drought events in the Kermanshah Province DOI
Morteza Gheysouri, Ataollah Kavian, Mahin Kalehhouei

et al.

Acta Geophysica, Journal Year: 2025, Volume and Issue: unknown

Published: March 8, 2025

Language: Английский

Citations

0
LONG-TERM ASSESSMENT OF FLOOD AND DROUGHT PHENOMENA IN THE LONG XUYEN QUADRANGLE, VIETNAMESE MEKONG DELTA DOI Open Access
Trần Thế Định, Tran Xuan Long, Ho Nguyen

et al.

Nativa, Journal Year: 2025, Volume and Issue: 13(1), P. 80 - 92

Published: March 24, 2025

Floods and droughts are considered extreme climatic phenomena that significantly negatively impact human life socio-economic activities. Using trend determination methods combined with statistical data, this study evaluates the evolution of floods over past 45 years (1979-2023) in Long Xuyen Quadrangle (LXQ) Vietnamese Mekong Delta (VMD). The results indicate large medium have become less frequent, while small increased significantly. Flood levels fluctuated time tend to decrease. However, contrary decreasing peak flood upstream (Chau Doc) inland areas (Tri Ton), downstream area (Long Xuyen) shows an increasing levels. Additionally, by calculating Standardized Precipitation Index (SPI) Rainfall Anomaly (RAI), has assessed characteristics, frequency, trends meteorological LXQ. from 1979 2023, experienced fairly severe droughts; however, severity decreased gradually recent years. frequency expression vary space, some periods experiencing prolonged droughts. findings can provide a critical basis understanding help managers propose policies solutions mitigate respond natural disasters LXQ region times. Keywords: drought; SPI; RAI; disaster risk; water management. Avaliação de longo prazo dos fenômenos inundação e seca no Quadrilátero Xuyen, do vietnamita RESUMO: Inundações secas são consideradas climáticos extremos que impactam significativamente vida humana as atividades socioeconômicas. Usando métodos determinação tendências combinados com dados estatísticos, este estudo avaliou evolução inundações nos últimos anos (LXQ), Vietnamita Os resultados mostram grandes médias se tornaram menos frequentes, enquanto pequenas aumentaram significativamente. níveis flutuaram ao tempo tendem diminuir. No entanto, contrário da tendência decrescente máximos nas áreas montante interior área jusante mostra uma crescente inundação. Além disso, calcular o Índice Precipitação Padronizado Anomalia Chuva características, frequência meteorológicas indicam sofreu bastante severas, mas severidade diminuiu lentamente anos. A expressão das variam espaço, alguns períodos sofrendo prolongadas. As descobertas deste podem fornecer base crítica compreensão para ajudar os gestores propor políticas soluções mitigar responder aos crescentes desastres naturais na região tempos. Palavras-chave: meteorológica; risco desastre.

Language: Английский

Citations

0