Advances in Space Research, Год журнала: 2024, Номер unknown
Опубликована: Дек. 1, 2024
Язык: Английский
Atmospheric Research, Год журнала: 2025, Номер unknown, С. 107929 - 107929
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Journal of Hydrology, Год журнала: 2025, Номер unknown, С. 132757 - 132757
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Journal of Hydrology, Год журнала: 2025, Номер unknown, С. 132804 - 132804
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
0
International Journal of Digital Earth, Год журнала: 2025, Номер 18(1)
Опубликована: Март 30, 2025
Язык: Английский
Процитировано
0
Earth and Space Science, Год журнала: 2024, Номер 11(3)
Опубликована: Март 1, 2024
Abstract We study vertical ground displacement time series from Global Navigation Satellite System (GNSS) stations to measure deformation associated with hydrological drought in the Po river basin. Focusing on interannual trend changes, rather than seasonal (annual) components, we found a clear spatially correlated signal that is temporally (anti)correlated changes level and SPEI‐12 index, moving upward during periods of river/index decrease vice versa. In 2021–2022 span, which culminated most severe last two centuries, estimate amount spatial distribution water loss basin its surroundings. Excluding signals, between January 2021 August 2022, GNSS underwent uplift, up 7 mm, corresponds ∼70 Gtons loss. Compared Land Data Assimilation Gravity Recovery Climate Experiment estimates, results show similar temporal evolution content but more heterogeneous values. continuous networks provide an effective way monitor multiannual storage even small basins serve as reliable indicator severity.
Язык: Английский
Процитировано
3
Land Degradation and Development, Год журнала: 2024, Номер unknown
Опубликована: Дек. 13, 2024
ABSTRACT Current research on ecological security pattern (ESP) primarily emphasizes preserving the overall connectivity of ecosystems. However, a significant gap exists in systematically identifying ecologically degraded areas and optimizing regional networks. In particular, southwestern region China, characterized by complex terrain diverse ecosystems, lacks comprehensive dynamic changes ESP. This study uses machine learning to identify primary drivers spatial patterns remote sensing index (RSEI) establishes corresponding resistance surface. Through integrating morphological analysis with circuit theory, we developed “point‐line‐area” combined ESP for Yunnan Province proposed recommendations protection. Results show that 66 sources were identified 2000, decreasing 52 2023, area increasing from 29,730.57 43,122.06 km 2 , southwest. Additionally, 69 corridors 2000 total length reducing 5934 4813 km. Ecological improved significantly; however, northeast remain sparse, contributing pressure. Furthermore, 71 65 pinch points, along 46 53 barriers, identified. Overall, source increased significantly, substantial improvements, especially such as Kunming economic circle exhibit limited functionality. Future efforts should focus expanding buffer zones restoring enhance stability.
Язык: Английский
Процитировано
3
Remote Sensing, Год журнала: 2023, Номер 15(23), С. 5524 - 5524
Опубликована: Ноя. 27, 2023
Revealing the mechanism of hydrological and agricultural drought has been challenging vital in environment under extreme weather water resource shortages. To explore evolution process from meteorological to further, multi-source remote sensing data, including Gravity Recovery Climate Experiment (GRACE) product, were collected Huaihe River basin China during 2002–2020. Three machine learning methods, long short-term memory neural network (LSTM), convolutional (CNN), categorical boosting (CatBoost), constructed for forecasting. The propagation time surface storage terrestrial drought, evaluated by standardized precipitation evapotranspiration index, was 8 11 months with Pearson correlation coefficients (R) 0.68 0.48, respectively. Groundwater correlated vegetation growth a 12-month lag time, In addition, affected soil moisture at depths ranging 100 200 cm an 8-month R −0.39. Although forecasting performances better than those groundwater CNN always performed LSTM CatBoost models, Nash–Sutclife efficiency values testing 0.28 0.70, 0.26 0.33, −0.10 −0.40 lead times 0–3 months, Furthermore, splitting training data random significantly improved methods rather chronological order non-stationary data.
Язык: Английский
Процитировано
5
GPS Solutions, Год журнала: 2023, Номер 28(1)
Опубликована: Дек. 27, 2023
Abstract The use of the global navigation satellite system (GNSS) for monitoring changes in terrestrial water storage (TWS) is growing. However, density GNSS stations sparse most areas, and widely used Green’s function (GF) method cannot provide a satisfactory resolution inversion problems. As Slepian basis (SBF) has been successfully gravity inversions, geodesists have recently applied SBF to displacements. evaluation TWS differences inferred from using GF rarely assessed. In this study, we both methods investigate Yunnan by more than ten years (2010–2021) observations. We observe remarkable consistency between two employed data, as well strong agreement with equivalent heights (EWH) Gravity Recovery Climate Experiment (GRACE) GRACE Follow-On (GFO), hydrological model (GLDAS-NOAH), precipitation despite variations amplitude. Furthermore, affected monsoon climate topography, prone drought. analyze main nine drought events, evaluate connection GNSS-inverted during 2010–2021, find that almost all droughts occurred "trough period" within GNSS-DSI.
Язык: Английский
Процитировано
5
Geodesy and Geodynamics, Год журнала: 2024, Номер unknown
Опубликована: Авг. 1, 2024
Vertical position changes of ground-based Global Navigation Satellite System (GNSS) stations have been used to study regional terrestrial water storage (TWS) changes. However, the feasibility is still unclear in many areas due diverse local effects. This aims evaluate capability GNSS vertical displacements monitoring hydrological variations four climate settings over Chinese mainland. The spatial and temporal load-induced (HYDL) at 208 sites during 2011–2020 were analyzed by comparing with Gravity Recovery Climate Experiment (GRACE)/GRACE Follow-On (GFO) Land Data Assimilation (GLDAS) derived TWS results show that positions different capabilities capturing seasonal non-seasonal dynamics regions. Among climatic settings, subtropical monsoon (SMC) region, largest deformation fluctuation (the mean root square (RMS) 7.97 mm), has highest HYDL-GRACE HYDL-GLDAS anti-correlation coefficients (CCs) −0.47 −0.45 scale, respectively. For individual site, number CC <−0.40 between HYDL GRACE/GLDAS-derived accounts for 55.1% (SMC), 13.0% 7.4% (temperate climate, TMC), 6.7% 13.3% continental TCC), 32.3% 38.7% (plateau PC), term, although proportion each type decreases mainly influence geodynamic human activities, especially SMC PC regions, site deformations good extremes. provide valuable information better application hydrology.
Язык: Английский
Процитировано
1
Sensors, Год журнала: 2024, Номер 24(16), С. 5329 - 5329
Опубликована: Авг. 17, 2024
Due to its unique geographical location and rapid urbanization, Xiamen is particularly susceptible geological disasters. This study employs 80 Sentinel-1A SAR images covering spanning from May 2017 December 2023 for comprehensive dynamic monitoring of the land subsidence. PS-InSAR SBAS-InSAR techniques were utilized derive surface deformation field time series separately, followed by a comparative analysis their results. was finally chosen in this higher coherence. Based on results, we conducted cause obtained following findings. (1) The most substantial subsidence occurred Maluan Bay Dadeng Island, where maximum rate 24 mm/yr cumulative reached 250 mm over course study. Additionally, regions exhibiting rates ranging 10 30 included Yuanhai Terminal, Bay, Xitang, Guanxun, Jiuxi entrance, Yangtang, southeastern part Yundang Lake. (2) Geological structure, groundwater extraction, reclamation engineering construction all have impacts fault belts seismic focus areas significant, area above clay layer settled significantly. Both direct indirect can prove that as amount extraction increases, increases. Significant prone occur after initial reclamation, during consolidation period old fill materials, compaction. changes soil appearance new buildings increases risk
Язык: Английский
Процитировано
1