Analysis of drought characteristics and comparison of historical typical years with 2022 drought in the Yangtze River Basin

Xing, Lisong; Zhao, Ruxin; Sun, Hongquan; Li, Ming; Tan, Zhuoyan

doi:10.1007/s11069-023-06344-9

Cited by 3 publications

(1 citation statement)

References 46 publications

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“…Climate change is expected to cause a decrease in streamflow, while TGR operations could also cause a decrease in streamflow during these months. In fact, in 2022, a large-scale drought occurred in the Yangtze River basin, leading to severe water shortages (Xing et al, 2023). This deserves more attention as there could be even more severe droughts in the future, especially from July to September.…”

Section: Future Flow Regime Changes and Implications For Tgr Operationmentioning

confidence: 99%

Quantifying the Regulation Capacity of the Three Gorges Reservoir on Extreme Hydrological Events and Its Impact on Flow Regime in a Changing Climate

Cheng,

Wang,

Yang

2024

Water Resources Research

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The Three Gorges Reservoir (TGR) is one of the world's largest hydropower projects and plays an important role in water resources management in the Yangtze River. For the sake of disaster prevention and catchment management, it is crucial to understand the regulation capacity of the TGR on extreme hydrological events and its impact on flow regime in a changing climate. This study obtains historical inflows of the TGR from 1961 to 2019 and uses a distributed hydrological model to simulate the future inflows from 2021 to 2070. These data are adopted to drive a machine learning‐based TGR operation model to obtain the simulated outflow with TGR operation, which are then compared with the natural flow without TGR operation to assess the impact of TGR. The results indicate that the average flood peaks and total flooding days in the historical period could have been reduced by 29.2% and 53.4% with the operation of TGR. The relative declines in drought indicators including duration and intensity were generally less than 10%. Faced with more severe extreme hydrological events in the future, the TGR is still expected to alleviate floods and droughts, but cannot bring them down to historical levels. The impact of TGR operation on flow regime will also evolve in a changing climate, potentially altering the habitats of river ecosystems. This study proposes feasible methods for simulating the operation of large reservoirs and quantifying the impact on flow regime, and provides insights for integrated watershed management in the upper Yangtze River basin.

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Section: Future Flow Regime Changes and Implications For Tgr Operationmentioning

confidence: 99%

Quantifying the Regulation Capacity of the Three Gorges Reservoir on Extreme Hydrological Events and Its Impact on Flow Regime in a Changing Climate

Cheng,

Wang,

Yang

2024

Water Resources Research

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Sudden change of fish functional compositions during a drought in the wet season of the middle Yangtze River, China

Chang,

Wu,

Lin

et al. 2024

Global Ecology and Conservation

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Physiological and Transcriptomic Characterization of Rice Genotypes under Drought Stress

Zhu,

Hassan,

et al. 2024

Agronomy

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Drought is a primary abiotic stress that inhibits rice (Oryza sativa L.) growth and development, and during the reproductive stage it has a negative impact on the rice seed-setting rate. This research study examined two rice lines, La-96 (drought sensitive) and La-163 (drought resistant), for drought stress treatment (with soil moisture at 20% for 7 days) and control (normal irrigation and kept soil moisture ≥40%). To elucidate the photosynthesis and molecular mechanisms underlying drought tolerance in rice, leaf photosynthetic traits and transcriptome sequencing were used to compare differences between two contrasting recombinant inbred lines (RIL) during drought and subsequent recovery at the booting stage. The rice line La-96 showed a significant decrease in seed-setting rate after being treated for seven days’ drought stress (from 86.64% to 22.75%), while La-163 was slightly affected (from 89.04% to 79.33%). The photosynthetic activities of both lines significantly decreased under the drought treatment, and these traits of La-163 recovered to a comparable level with the control after three days of rewatering. The transcriptome of both lines in three treatments (the control, drought stress, and subsequent recovery) were tested, and a total of 16,051 genes were identified, among which 10,566 genes were differentially expressed in various treatments and rice lines. Comprehensive gene expression profiles revealed that the specifically identified DEGs were involved in the ribosome synthesis and the metabolic pathway of photosynthesis, starch, and sucrose metabolism. The DEGs that are activated and respond quickly, as seen during recovery in the tolerant rice line, may play essential roles in regulating subsequent growth and development. This study uncovered the molecular genetic pathways of drought tolerance and extended our understanding of the drought tolerance mechanisms and subsequent recovery regulation in rice.

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Analysis of drought characteristics and comparison of historical typical years with 2022 drought in the Yangtze River Basin

Cited by 3 publications

References 46 publications

Quantifying the Regulation Capacity of the Three Gorges Reservoir on Extreme Hydrological Events and Its Impact on Flow Regime in a Changing Climate

Quantifying the Regulation Capacity of the Three Gorges Reservoir on Extreme Hydrological Events and Its Impact on Flow Regime in a Changing Climate

Sudden change of fish functional compositions during a drought in the wet season of the middle Yangtze River, China

Physiological and Transcriptomic Characterization of Rice Genotypes under Drought Stress

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