Hydrological regime has been widely recognized as one of the major forces determining vegetation distribution in seasonally flooded wetland. Poyang Lake, largest freshwater lake China, encountering dramatic changes hydrological conditions last decade, which greatly influenced wetland vegetations. To explore relationships between hydrology and distribution, water-table depth, soil moisture, species composition, diversity biomass were measured at a section Wucheng National Nature Reserve....

Abstract Floodplain systems are most often hydrologically complex settings characterized by highly variable surface water–groundwater interactions that subjected to wide‐ranging wetting and drying over seasonal timeframes. This study used field methods, statistical analysis, the Darcy's law approach explore dynamics, interactions, fluxes in a geographically river‐floodplain wetland‐isolated lake system (Poyang Lake, China). The floodplain of Poyang Lake is affected strongly shifts between...

Numerous floodplain lakes in the world have been shrinking and gradually transformed into semi-closed reservoirs under control of sluices for past century, which has led to substantial ecosystem services loss. In this study, historical topographic maps 1930s 1970s remote sensing images (1980s–2020s) are used reconstruct centennial evolution characteristics typical Central Yangtze Ecoregion, i.e., Wanjiang lake group. Moreover, we focus on their driving factors from perspective sluice...

Hydrological properties are driving forces of wetland systems. The influence water level fluctuations on vegetation distribution is growing interest as wetlands increasingly disturbed by climate change and intensive human activity. Based time series MODIS (Moderate Resolution Imaging Spectroradiometer) imagery from 2000 to 2012, we investigated the spatial–temporal dynamics in Poyang Lake using a combined Sen’s slope Mann–Kendall (MK) test approach, explored their correlations with different...

Estuarine wetlands have experienced a variety of ecological and environmental problems caused by natural anthropogenic factors. China has proposed series measures made great efforts to control coastal degradation; however, decision makers still urgently need know which implement how they will influence the estuarine environment functions. This study used field observations, hydrodynamic model, statistical methods investigate effects potential restoration scenarios on conditions in...

Although changes in water temperature influence the rates of many ecosystem processes lakes, knowledge regime for large floodplain lake systems subjected to multiple stressors has received little attention. The coupled models can serve derive more on impact ecosystems. For this purpose, we used a physically-based hydrodynamic model with transport examine spatial and temporal behavior primary causal factors within Poyang Lake that is representative shallow lakes China. Model performance...

Abstract Lakes play a crucial role in retaining water and altering biogeochemical processes on floodplains. Existing strategies algorithms for estimation of storage are insufficient dynamic floodplain lakes due to the scarcity available observations. Combining time series open area with fine spatial-temporal resolution by integrating Landsat MODIS observations Poyang Lake (China) digital elevation models, limited gauge data, generated estimates as function surface hydrological connectivity....

Abstract The dynamic responses of wetlands to upstream water conservancy projects are becoming increasingly crucial for watershed management. Poyang Lake is a wetland system critical ecological importance and connected with the Yangtze river. However, in context disturbed regime resulting from human activities climate change, vegetation dynamics Three Gorges Dam (TGD) have not been investigated. We addressed this knowledge gap by using daily level data Landsat images 1987 2018. were acquired...

Water regime characteristics have been recognized as critical factors for aquatic vegetation. In this study, we examined changes in vegetation coverage area two shallow sub-lakes of Poyang Lake (Bang and Cuoji Lake) during the dry season from 1987 to 2017. The relationships between eight water components (annual average level, annual maximum minimum flooded days at five levels [11, 13, 15, 17, 19 m]) were determined. most regimes identified results demonstrated that Bang peaked drier years...

Abstract The weakening of hydrological connectivity caused by hydraulic barriers and its impact on the ecological environment has gained worldwide attention. Previous studies have primarily focused obstructive effect barriers, often overlooking influence internal regulated water systems. study employed a new conceptual framework utilized assessment tool to assess proposed Poyang Lake Hydraulic Project (PLHP) lake's connectivity. estimated impacts were based various factors, including...

A static and exhaustive extraction mode of hollow fiber-supported liquid membrane was developed for field sample passive pretreatment environmental water samples. The device prepared by immobilizing dihexyl ether in the wall a polypropylene fiber (60 cm length, 50 μm thickness, 280 id) as filling lumen with 0.1 M NaOH acceptor, closing two ends an aluminum foil. Passive conducted immersing into 15 mL samples modified 0.01 HCl 20% m/v NaCl. Model analytes including 4-chlorophenol,...

Hydrological connectivity plays a major role in solving water resource and eco-environmental problems. However, this phenomenon has not been afforded the attention it deserves. Detailed analysis of river systems could provide considerable insight into structural functional attributes riverine landscapes. The current study used graph theory approach associated indicators to explore characteristics evolution hydrological large catchment (Poyang Lake, China). results revealed that structure...