Flow regime changes in the Lancang River, revealed by integrated modeling with multiple Earth observation datasets

Zhang, Xingxing; Jiang, Liguang; Liu, Zhaofei; Kittel, Cécile Marie Margaretha; Yao, Zhijun; Druce, Daniel; Wang, Rui; Tøttrup, Christian; Li, Jun; Jiang, Hanfang; Bauer‐Gottwein, Peter

doi:10.1016/j.scitotenv.2022.160656

Cited by 13 publications

(5 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The advances accrued from Earth Observation from space have greatly contributed to the understanding of reservoir dynamics in many aspects (DelSontro et al., 2018; Dong et al., 2023; Gao et al., 2012; Pandey et al., 2016; Shen et al., 2022; X. Zhang et al., 2023). One of the remote sensing techniques is satellite altimetry, which so far is the most feasible approach to retrieve water surface elevation (WSE) from space.…”

Section: Introductionmentioning

confidence: 99%

Reservoir Filling Up Problems in a Changing Climate: Insights From CryoSat‐2 Altimetry

Wang,

Jiang,

Nielsen

et al. 2024

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

Recent droughts have severely threatened water security in many regions worldwide. Reservoirs, designed to combat droughts and secure water supply partially, are reported failing to fill up to the total capacity due to severe droughts. How bad is climate affecting reservoir filling up on a global scale? This issue has not been studied. We present a big picture of reservoirs in crisis using satellite altimetry. Thanks to the unique characteristics of CryoSat‐2, 525 reservoirs worldwide were investigated during 2010–2022. Results show that most reservoirs (93%) are found not fully filled up at least once. About 21% of reservoirs, which are mainly located in the Southern Hemisphere, show a significant decline in water levels. Moreover, about 20% of reservoirs with larger level fluctuations (>3 m) are located in less developed economies, indicating informed operation rules are needed. Further analyses indicate reservoirs are largely affected by extreme climate events, such as ENSO.

show abstract

Section: Introductionmentioning

confidence: 99%

Reservoir Filling Up Problems in a Changing Climate: Insights From CryoSat‐2 Altimetry

Wang,

Jiang,

Nielsen

et al. 2024

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…They are quite vulnerable to human activities like industry, agriculture, aquaculture, and climate change [3][4][5]. Under the influence of natural and anthropogenic factors, lakes and reservoirs may change considerably, and even the water bodies may disappear [6,7]. Water levels can clearly show the changing trends under those factors.…”

Section: Introductionmentioning

confidence: 99%

Estimating and Assessing Monthly Water Level Changes of Reservoirs and Lakes in Jiangsu Province Using Sentinel-3 Radar Altimetry Data

Xu,

Xia,

Ferreira

et al. 2024

Remote Sensing

View full text Add to dashboard Cite

Generating accurate monthly estimations of water level fluctuations in reservoirs and lakes is crucial for supporting effective water resource management and protection. The dual-satellite configuration of Sentinel-3 makes it possible to monitor water level changes with great coverage and short time intervals. However, the potential of Sentinel-3’s Synthetic Aperture Radar Altimetry (SRAL) data to enable operational monitoring of water levels across Jiangsu Province on a monthly basis has not yet been fully explored. This study demonstrated and validated the use of Sentinel-3’s SRAL to generate accurate monthly water level estimations needed to inform water management strategies. The monthly water levels of lakes and reservoirs from 2017 to 2021 were produced using Sentinel-3 level-2 land products. Results showed that, compared with in situ data across eight studied lakes, all lakes presented R (Pearson correlation coefficient) values greater than 0.5 and Root Mean Square Error (RMSE) values less than 1 m. Notably, water level estimates for Tai Lake, Gaoyou Lake, and Luoma Lake were particularly accurate, with R above 0.9 and RMSE below 0.5 m. Furthermore, the monthly water level estimates derived from the Sentinel-3 data showed consistent seasonal trends over the multi-year study period. The annual water level of all lakes did not change significantly, except for Shijiu Lake, of which the difference between the highest and lowest water level was up to about 5 m. Our findings confirmed the water level observation ability of Sentinel-3. The accuracy of water level monitoring could be influenced by internal water level differences, terrain features, as well as the area and shape of the lake. Larger lakes with more altimetry sampling points tended to yield higher accuracy estimates of water level fluctuations. These results demonstrate that the frequent, wide-area coverage offered by this satellite platform provides valuable hydrological information, especially across remote regions lacking in situ data. Sentinel-3 has immense potential to support improved water security in data-scarce regions.

show abstract

“…This region faces challenges due to rapid economic development, population growth, and urbanization, causing an imbalance between increasing water demand and its scarcity [46,47]. Research related to the progress of Lancang-Mekong River Basin studies has mainly focused on changes in precipitation [48][49][50], cooperation in water resources and management [51][52][53], hydropower dam development [54,55], changes in runoff [56][57][58][59], droughts and floods [60,61], and the waterfood-energy nexus in the basin [62,63]. Although these studies have analyzed different aspects of water security, the differences in water security among the six countries in the basin have largely been neglected.…”

Section: Introductionmentioning

confidence: 99%

Assessing Water Security and Coupling Coordination in the Lancang–Mekong River Basin for Sustainable Development

Zheng,

He,

Zhang

et al. 2023

Sustainability

View full text Add to dashboard Cite

Water security is crucial for the sustainable development of regional water resources. Here, we utilize the Driver-Pressure-State-Impact-Response (DPSIR) framework to construct an indicator system for assessing water security in the Lancang–Mekong River Basin (LMRB). This study also delves into the level of development in the coupling coordination between the economic and social systems and the water resources systems in the basin. The findings reveal that the overall water security situation in the LMRB is satisfactory, with three countries (China, Laos, and Vietnam) surpassing the “safe” threshold and three countries (Thailand, Cambodia, and Myanmar) “Basically safe”. However, water security issues persist, particularly in relation to water pollution and scarcity. Seasonal water shortages and water-related disasters arise due to uneven rainfall distribution throughout the year and inadequate regulating facilities such as wetlands and reservoirs. In addition, the overall coupling coordination level in the LMRB is low, ranging between 0.3 and 0.4, corresponding to a moderate imbalance level in the assessment criteria system. Specifically, Laos and China exhibit the highest coupling coordination level, with a degree of 0.36, whereas Thailand and Myanmar demonstrate the lowest level, with degrees of 0.33 and 0.31, respectively. Overall, our results offer a scientific foundation for the sustainable development of countries within the LMRB.

show abstract

Flow regime changes in the Lancang River, revealed by integrated modeling with multiple Earth observation datasets

Cited by 13 publications

References 91 publications

Reservoir Filling Up Problems in a Changing Climate: Insights From CryoSat‐2 Altimetry

Reservoir Filling Up Problems in a Changing Climate: Insights From CryoSat‐2 Altimetry

Estimating and Assessing Monthly Water Level Changes of Reservoirs and Lakes in Jiangsu Province Using Sentinel-3 Radar Altimetry Data

Assessing Water Security and Coupling Coordination in the Lancang–Mekong River Basin for Sustainable Development

Contact Info

Product

Resources

About