Modeling Lake Titicaca's water balance: the dominant roles of precipitation and evaporation DOI Creative Commons
Nilo Lima, Denis Ruelland, Antoine Rabatel

et al.

Hydrology and earth system sciences, Journal Year: 2025, Volume and Issue: 29(3), P. 655 - 682

Published: Feb. 4, 2025

Abstract. In the face of climate change and increasing anthropogenic pressures, a reliable water balance is crucial for understanding drivers level fluctuations in large lakes. However, poorly gauged hydrosystems such as Lake Titicaca, most components are not measured directly. Previous estimates this lake have relied on scaling factors to close balance, which introduces additional uncertainty. This study presents an integrated modeling framework based conceptual models quantify natural hydrological processes net irrigation consumption. It was implemented Water Evaluation Planning System (WEAP) platform at daily time step period 1982–2016, considering following terms balance: upstream inflows, direct precipitation evaporation over lake, downstream outflows. To estimate we evaluated impact snow ice withdrawals predicted streamflow levels. We also role heat storage from lake. The results showed that proposed makes it possible simulate levels ranging 3808 3812 m a.s.l. with good accuracy (RMSE = 0.32 d−1) wide range long-term hydroclimatic conditions. estimated Titicaca shows inflows account 56 % (958 mm yr−1) 44 (744 total while 93 (1616 outflows due remaining 7 (121 closure has error −15 yr−1 without applying factors. Snow processes, together withdrawals, had minimal variations level. Thus, primarily driven by high rates. These will be useful supporting decision-making resource management. demonstrate simple representation enables accurate simulation could replicated other lakes because relatively easy implement, requires few data, computationally inexpensive.

Language: Английский

Seasonal Vegetation Trends for Europe over 30 Years from a Novel Normalised Difference Vegetation Index (NDVI) Time-Series—The TIMELINE NDVI Product DOI Creative Commons
Christina Eisfelder, Sarah Asam, Andreas Hirner

et al.

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(14), P. 3616 - 3616

Published: July 20, 2023

Remote sensing multi-decadal time-series provide important information for analysing long-term environmental change. The Advanced Very High Resolution Radiometer (AVHRR) has been providing data since the early 1980s. Normalised Difference Vegetation Index (NDVI) derived thereof can be used monitoring vegetation conditions. This study presents novel TIMELINE NDVI product, which provides a consistent set of daily, 10-day, and monthly composites at 1 km spatial resolution based on AVHRR Europe North Africa, currently spanning period from 1981 to 2018. After investigating temporal availability within composite seasonal trends have 1989–2018 assess change in northern Africa. trend analysis reveals distinct patterns with varying spring, summer autumn different regions Europe. Integrating entire growing season, result shows positive large areas that confirm reinforce previous research. analyses show product allows dynamics monitored pan-European scale detection specific regional patterns.

Language: Английский

Citations

25
GRDL: A New Global Reservoir Area‐Storage‐Depth Data Set Derived Through Deep Learning‐Based Bathymetry Reconstruction DOI Creative Commons
Zhen Hao, Fang Chen,

Xiaofeng Jia

et al.

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(1)

Published: Jan. 1, 2024

Abstract Reservoirs play a critical role in the global water cycle by regulating flow of from environment into human systems. Accurate estimation area‐storage‐depth relationships for reservoirs is essential effective hydrological modeling and reservoir storage monitoring. Bathymetry reconstruction presents promising approach to derive this information. Current bathymetry methods either rely on simple approximations or are constrained dependence altimetry data field survey data. To overcome these limitations, study pioneering involving training deep learning model reconstruct establish precise relationships. We trained with approximately 160,000 simulated derived Shuttle Radar Topography Mission (SRTM) fine‐tuned based hundreds By employing SRTM, 7,250 Global Reservoir Dam Database were subsequently reconstructed. The method validated against comprehensive reference sets, including 54 test data, 118 satellite altimetry‐based reservoirs, 68 LiDAR‐based reservoirs. reconstructed achieves mean absolute error 7.87 m +2.05 validation references significantly outperforms previous geometric approximation techniques, median normalized root square (NRMSE) values 20.6% area‐storage 22.1% area‐level curves. Additionally, variations estimated precision, outperforming methods. proposed learning‐based robust solution accurate establishes more reliable worldwide.

Language: Английский

Citations

12
Distinctive Patterns of Water Level Change in Swedish Lakes Driven by Climate and Human Regulation DOI Creative Commons
Saeid Aminjafari, Ian A. Brown, Frédéric Frappart

et al.

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(3)

Published: March 1, 2024

Abstract Despite having approximately 100,000 lakes, Sweden has limited continuous gauged lake water level data. Although satellite radar altimetry (RA) emerged as a popular alternative to measure levels in inland bodies, it not yet been used understand the large‐scale changes Swedish lakes. Here, we quantify 144 lakes using RA data and situ measurements examine effects of flow regulation hydroclimatic variability. We use from several missions, including ERS‐2, ENVISAT, JASON‐1,2,3, SARAL, Sentinel‐3A/B. found that during 1995–2022, around 52% exhibited an increasing trend 43% decreasing trend. Most exhibiting were north Sweden, while most showing south. Regarding potential regulation, unregulated had smaller trends dynamic storage than regulated ones. While seasonal patterns are similar south, they differ substantially. This study highlights need continuously monitor for adaptation strategies face climate change downstream regulatory schemes.

Language: Английский

Citations

12
Global impacts of heat and water stress on food production and severe food insecurity DOI Creative Commons
Tom Kompas,

Tuong Nhu,

R. Quentin Grafton

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: June 22, 2024

In contrast to most integrated assessment models, with limited transparency on damage functions and recursive temporal dynamics, we use a unique large-dimensional computational global climate trade model, GTAP-DynW, directly project the possible intertemporal impacts of water heat stress food supply security 2050. The GTAP-DynW model uses GTAP production data for 141 countries regions, varying baselines, results are aggregated into 30 countries/regions commodity sectors. Blue projections drawn from WRI source material GTAP-Water database incorporate dynamic changes in resources their availability agricultural international trade, thus providing more general measure severe insecurity damages warming. Findings presented three representative concentration pathways: RCP4.5-SSP2, RCP8.5-SPP2, RCP8.5-SSP3 (population growth only SSPs) project: (a) substantial declines, as measured by GCal, some 6%, 10%, 14% 2050 (b) number additional people 2050, correspondingly, increases 556 million, 935 1.36 billion compared 2020 baseline.

Language: Английский

Citations

12
Water resource dynamics and protection strategies for inland lakes: A case study of Hongjiannao Lake DOI
Sun MeiYing, Le Zhang,

Rongjin Yang

et al.

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 355, P. 120462 - 120462

Published: Feb. 28, 2024

Language: Английский

Citations

11
Centennial loss of lake wetlands in the Yangtze Plain, China: Impacts of land use changes accompanied by hydrological connectivity loss DOI
Bing Li, Rongrong Wan,

Guishan Yang

et al.

Water Research, Journal Year: 2024, Volume and Issue: 256, P. 121578 - 121578

Published: April 6, 2024

Language: Английский

Citations

10
Sustainable development of urban agglomerations around lakes in China: Achieving SDGs by regulating Ecosystem Service Supply and Demand through New-type Urbanization DOI
Tongning Li, Yaobin Liu, Xiao Ouyang

et al.

Habitat International, Journal Year: 2024, Volume and Issue: 153, P. 103206 - 103206

Published: Oct. 21, 2024

Language: Английский

Citations

10
Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies DOI Creative Commons
Gesa A. Weyhenmeyer, Azubuike V. Chukwuka, Orlane Anneville

et al.

Earth s Future, Journal Year: 2024, Volume and Issue: 12(4)

Published: April 1, 2024

Abstract The world's 1.4 million lakes (≥10 ha) provide many ecosystem services that are essential for human well‐being; however, only if their health status is good. Here, we reviewed common lake issues and classified them using a simple health‐based approach to outline living systems in need of oxygen, clean water balanced energy nutrient supply. main reason adopting some the terminology classification increase awareness understanding global issues. We show exposed various anthropogenic stressors which can result issues, ranging from thermal, circulatory, respiratory, nutritional metabolic infections poisoning. Of particular concern well‐being widespread drying, severe circulatory issue with cascading effects on health. estimated ∼115,000 evaporate twice as much they gain direct precipitation, making vulnerable potential drying inflowing waters follow trend, putting more than 153 people at risk who live close vicinity those lakes. Where remain untreated, will decline or even vanish, posing threat millions people. recommend coordinated multisectoral multidisciplinary prevention treatment strategies, include follow‐up progress an assessment resilience intensifying threats. Priority should be given implementing sewage treatment, mitigating climate change, counteracting introductions non‐native species decreasing uncontrolled releases chemicals into hydro‐, bio‐, atmosphere.

Language: Английский

Citations

9
Drinking water safety improvement and future challenge of lakes and reservoirs DOI
Yunlin Zhang, Jianming Deng,

Yongqiang Zhou

et al.

Science Bulletin, Journal Year: 2024, Volume and Issue: 69(22), P. 3558 - 3570

Published: June 18, 2024

Language: Английский

Citations

9
Global evaluation of current and future threats to drylands and their vertebrate biodiversity DOI Creative Commons
Amir Lewin, Gopal Murali, Shimon Rachmilevitch

et al.

Nature Ecology & Evolution, Journal Year: 2024, Volume and Issue: 8(8), P. 1448 - 1458

Published: July 4, 2024

Drylands are often overlooked in broad conservation frameworks and development priorities face increasing threats from human activities. Here we evaluated the formal degree of protection global drylands, their land vertebrate biodiversity current threats, projected human-induced land-use changes to drylands under different future climate change socioeconomic scenarios. Overall, have lower protected-area coverage (12%) compared non-drylands (21%). Consequently, most dryland vertebrates including many endemic narrow-ranging species inadequately protected (0-2% range coverage). Dryland threatened by varied anthropogenic factors-including agricultural infrastructure (that is, artificial structures, surfaces, roads industrial sites). Alarmingly, 2100 experience some conversion 95-100% natural habitat due urban, alternative energy expansion. This loss undisturbed regions is expected across pathways, even optimistic scenarios characterized progressive policies moderate trends.

Language: Английский

Citations

9