Assessing effective hydrological connectivity for floodplains with a framework integrating habitat suitability and sediment suspension behavior

Tan, Zhiqiang; Li, Yunliang; Zhang, Qi; Liu, Xinggen; Song, Yunbo; Xue, Chenyang; Lu, Jianzhong

doi:10.1016/j.watres.2021.117253

Cited by 34 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, there were many shallow sub‐lakes in Poyang Lake wetland (as many as 77 sub‐lakes with an area of more than 1.0 km 2 ), and the hydrological connectivity between these shallow sub‐lakes and the main lake water body or the surrounding water system played a key role in regulating and changing the transfer and exchange of materials, energy and organisms (Bracken & Croke, 2007; Freeman et al, 2007; Higgisson et al, 2020; Perkin et al, 2015) and also had a close relationship with water quality and number of waterbirds and fishes in Poyang Lake (Li et al, 2021; Tan et al, 2021). Therefore, in the following study, the impact of increasing water release of the TGR on hydrological connectivity in Poyang Lake wetland will also be taken into account to fully understand the ecological and environmental effects of water regime changes in Poyang Lake.…”

Section: Discussionmentioning

confidence: 99%

“…Increasing the water release of the TGR and replenishing water to the middle and lower reaches of the Yangtze River during the dry periods is a good and effective way to alleviate the severe drought plaguing in Poyang Lake (Zhang et al, 2014). However, increasing water release of the TGR inevitably disturbed the dynamic balance between the downstream wetland system and lake hydrological regimes, and easily had greater impacts on the distribution pattern and stability of wetland vegetation, and even the structure and function of the wetland ecosystem (Li et al, 2021; Tan et al, 2021). Previous studies have focused more on the impact of the impoundment of the TGR on lakes and wetlands downstream and have not paid enough attention to the influences of increase of water release in dry season, which is critical to formulating drought relief measures and ensuring wetland ecological security in Poyang Lake area.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influences of increasing water release of the Three Gorges Reservoir during dry season on water regimes of downstream lake

Yao

et al. 2023

Hydrological Processes

View full text Add to dashboard Cite

The severe and frequent drought in Poyang Lake, the largest freshwater lake in China, has seriously affected the local water resources security and wetland ecological security. Especially, the impoundment of the Three Gorges Reservoir (TGR) in the Yangtze River further aggravated the drought in lake. To explore the approaches to alleviate drought in Poyang Lake, this study simulated and quantified the influences of increasing water release of the TGR during the dry periods on water regimes of Poyang Lake, including the lake water level, duration of low water, flow velocity, flow field of lake, as well as potential suitable habitat area of migratory birds, based on a hydrodynamic model. Major results showed that the increase of water release of the TGR raised the lake water level, especially in the northern lake area, with the average lake level increase of 0.2–1.08 m and the lowest lake level increase of 0.16–0.68 m. Meanwhile, the duration of low water was significantly shortened, from 127 days to 87–116 days (threshold lake level of 12.0 m) at Xingzi station. In addition, the hydrodynamic simulations revealed that the increasing water release of the TGR reduced the lake flow velocity and discharge of Poyang Lake, which decreased the outflow of lake by 1.66–17.87 × 108 m3, accounting for about 0.47%–5.11% of the total outflow in the dry season. Finally, the potential suitable habitat area with 0.2–0.6 m water depth increased by 1.7–27.9 km2 in December–February, and showed a significant expansion trend in the central area of Poyang Lake. Outcomes of the study are useful for understanding the influences of water release of the TGR on water regimes of downstream lakes, and can provide valuable references for mitigating lake droughts in complex river–lake system.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influences of increasing water release of the Three Gorges Reservoir during dry season on water regimes of downstream lake

Yao

et al. 2023

Hydrological Processes

View full text Add to dashboard Cite

show abstract

“…The structural connectivity of river networks refers to connectivity between surface forms that are susceptible to runoff generation and sediment transport (Williams et al, 2016), while the hydrological connectivity of the river network refers to the smoothness of the material, energy and biological transport processes in the river system regulated by hydrological processes, mainly depending on flow paths, bifurcation points, flows and water levels (Chi et al, 2018). In recent years, researchers have proposed a variety of hydrological connectivity assessment methods from different perspectives (Bracken et al, 2013, 2020; Tan et al, 2021; Wei et al, 2022). The common methods include the index monitoring method (Liu et al, 2020), graph theory method (Zhang et al, 2022), connected function method (Nguyen et al, 2021), hydrological model method (Li, Zhang, et al, 2019b), comprehensive index method (Li et al, 2018) and so on.…”

Section: Introductionmentioning

confidence: 99%

Analysis of water source contributions and their impacts on hydrological structural connectivity in plain urban river network areas based on stable isotopes (δ²H, δ¹⁸O)

Zhang

Bu²,

et al. 2022

Hydrological Processes

View full text Add to dashboard Cite

Water sources carry chemicals that can have a significant impact on the water environment of a river network, and understanding the contribution of different water sources to the river network can help to manage the pollution of the river network at its source. The hydrological connectivity of a river network affects the self‐purification capacity and flood prevention capacity of the river. Therefore, an isotope tracer approach was applied to determine the contribution rate of different water bodies to a river network and hydrological connectivity was quantified by introducing the retention rate. Changzhou city was selected as the study area because it is an urbanized city with the characteristics of a plain river network and it is faced with poor hydrological connectivity due to artificial constructions (dams and pumps) and human activity (urbanization). River water, well water (shallow groundwater), lake water and rainfall were collected during the flood season and nonflood season, and hydrogen and oxygen isotopes were determined. The temporal and spatial variations in hydrogen and oxygen isotopes in different water bodies and the state of the water cycle in different water bodies were analysed. IsoSource and MixSIAR models were established to analyse the contribution rate of river network water sources in the study area, and their effectiveness was compared. The results of the MixSIAR model were selected to evaluate the hydrological connectivity of the river network in the study area, providing a method to quantify the hydrological connectivity of specific rivers of the river network in Changzhou city. This method could also be applied to other urban plain river network areas to study river connectivity.

show abstract

“…Hydrological connectivity refers to the process of transferring various materials, energies, and organisms within or between elements of a hydrological cycle, using water as a medium [3,4], including spatial three-dimensional changes as well as temporal dynamic changes [5]. Wetland hydrological processes play a direct and important role in the processes of formation, development, succession, and extinction of wetlands [6][7][8]. In wetland ecosystems, the transfer of materials, energy, and information is mostly related to wetland hydrological processes, and is accompanied by the water cycle, which makes hydrological connectivity very important for the stability and maintenance of wetlands [9].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Evolution of Wetland Eco-Hydrological Connectivity in the Poyang Lake Area Based on Long Time-Series Remote Sensing Images

et al. 2021

View full text Add to dashboard Cite

Hydrological connectivity is important for maintaining the stability and function of wetland ecosystems. Small-scale hydrological connectivity restricts large-scale hydrological cycle processes. However, long-term evolutionary studies and quantitative evaluation of the hydrological connectivity of wetlands in the Poyang Lake area have not been sufficiently conducted. In this study, we collected 21 Landsat remote sensing images and extracted land use data from 1989 to 2020, introducing a morphological spatial pattern analysis model to assess the wetland hydrological connectivity. A comprehensive method for evaluating the hydrological connectivity of wetlands was established and applied to the Poyang Lake area. The results showed that, over the course of 31 years, the wetland landscape in the Poyang Lake area changed dramatically, and the wetland area has generally shown a decreasing and then increasing trend, among which the core wetland plays a dominant role in the hydrological connectivity of the Poyang Lake area. In addition, the hydrological connectivity decreases as the core wetland area decreases. From 1989 to 2005, the landscape in the Poyang Lake area focused mainly on the transition from wetland to non-wetland. From 2005 to 2020, the conversion of wetland landscape types shows a clear reversal compared to the previous period, showing a predominant shift from non-wetland to wetland landscapes. The eco-hydrological connectivity of the wetlands in the Poyang Lake area from 1989 to 2020 first decreased, and then increased after 2005. In the early stage of the study (1989−2005), we found that the connectivity of 0.3444 in 2005 was the lowest value in the study period. A resolution of 30 m and an edge effect width of 60 m were optimal for studying the hydrological connectivity of wetlands in the Poyang Lake area. The main drivers of the changes in hydrological connectivity were precipitation and the construction of large-scale water conservation projects, as well as changes in land use. This study provides a good basis for assessing hydrological connectivity in a meaningful way, and is expected to provide new insights for maintaining and restoring biodiversity and related ecosystem services in the Poyang Lake area.

show abstract

Assessing effective hydrological connectivity for floodplains with a framework integrating habitat suitability and sediment suspension behavior

Cited by 34 publications

References 35 publications

Influences of increasing water release of the Three Gorges Reservoir during dry season on water regimes of downstream lake

Influences of increasing water release of the Three Gorges Reservoir during dry season on water regimes of downstream lake

Analysis of water source contributions and their impacts on hydrological structural connectivity in plain urban river network areas based on stable isotopes (δ²H, δ¹⁸O)

Spatiotemporal Evolution of Wetland Eco-Hydrological Connectivity in the Poyang Lake Area Based on Long Time-Series Remote Sensing Images

Contact Info

Product

Resources

About

Assessing effective hydrological connectivity for floodplains with a framework integrating habitat suitability and sediment suspension behavior

Cited by 34 publications

References 35 publications

Influences of increasing water release of the Three Gorges Reservoir during dry season on water regimes of downstream lake

Influences of increasing water release of the Three Gorges Reservoir during dry season on water regimes of downstream lake

Analysis of water source contributions and their impacts on hydrological structural connectivity in plain urban river network areas based on stable isotopes (δ2H, δ18O)

Spatiotemporal Evolution of Wetland Eco-Hydrological Connectivity in the Poyang Lake Area Based on Long Time-Series Remote Sensing Images

Contact Info

Product

Resources

About

Analysis of water source contributions and their impacts on hydrological structural connectivity in plain urban river network areas based on stable isotopes (δ²H, δ¹⁸O)