Parameterizing the Yellow River Delta tidal creek morphology using automated extraction from remote sensing images

Gong, Zhaoning; Mou, Kuinan; Wang, Qiwei; Qiu, Huachang; Zhang, Cheng; Zhou, Demin

doi:10.1016/j.scitotenv.2020.144572

Cited by 17 publications

(9 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The normalized water index was calculated, and the planar vectors of the tidal creeks were extracted by the combination of supervised classification and visual interpretation. The center line of the planar vector of a tidal creek was extracted by the ArcScan module, considering a linear tidal creek [27,28].…”

Section: Data Sourcesmentioning

confidence: 99%

“…The total length (L), curvature (C) [33,34], fractal dimension (D) [35], and branching rate (Y) [27,36] were calculated to evaluate the morphological characteristics of the tidal creeks, which were then classified according to the principle of natural break point. The tidal creeks with similar morphological characteristics could be grouped together by using the natural break method, so that the differences in length for different tidal creek grades could be observed intuitively, and the differences in the morphological characteristics of tidal creeks of the same grade could be further reduced [37].…”

Section: Tidal Creek Morphological Indexmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative Analysis of Tidal Creek Evolution and Vegetation Variation in Silting Muddy Flats on the Yellow Sea

Zheng,

Wang,

Zhao

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

Coastal wetland ecosystems around the world are facing serious challenges due to rapid economic development, climate change, and sea level rise. These factors have a great influence on the tidal creek network and vegetation ecosystem. Accordingly, based on long-term time-series remote sensing images, the evolution characteristics of tidal creeks and vegetation in silting muddy flats on the Yellow Sea were analyzed, and different quantitative methods were used to describe the relationship between tidal creeks and vegetation. The results showed that the total number of tidal creeks exhibited a downward trend, while the number of small creeks increased over time. The total length of the tidal creeks decreased at a rate of 16.1 km per year during the study period. The length of three-grade tidal creeks, the patch area ratio of Suaeda salsa, and a low vegetation coverage had a great influence on the average return flow length (LOP). LOP was negatively correlated with the patch area ratio of S. salsa, but positively correlated with the reclamation area, both significantly. With the increase in the patch area ratio of S. salsa, the total length of the tidal creeks increased by 12.95 km, and LOP decreased by 35.35 m.

show abstract

Section: Data Sourcesmentioning

confidence: 99%

Section: Tidal Creek Morphological Indexmentioning

confidence: 99%

Quantitative Analysis of Tidal Creek Evolution and Vegetation Variation in Silting Muddy Flats on the Yellow Sea

Zheng,

Wang,

Zhao

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…However, no regular effect was observed for long and short reclamation times on soil nutrient content. The results indicated that soil nutrient content was also significantly influenced by other factors [13]. Furthermore, massive research has been conducted to explore the spatial characterization of arable land, as well as the relationship of the temporal and spatial variability of soil nutrients with environmental factors, including fertilization, topography, crop type, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, the index is calculated by applying scoring equations to compare the final values and enable soil quality assessments. Remote sensing technology has been used by experts to evaluate the temporal and spatial dynamics of soil salinity and nutrients [13]. However, most of the findings have been limited to the visual characteristics of multiple indicators.…”

Section: Introductionmentioning

confidence: 99%

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

Liu,

Li,

Zhang

et al. 2023

Agronomy

View full text Add to dashboard Cite

The saline soils in the Yellow River Delta are primarily affected by seawater intrusion resulting from the intersection of land and sea, which exhibit variations in salinity. The quality of these soils is also influenced by anthropogenic reclamation, including fertilization and irrigation. This study quantitatively evaluated the distinct soil properties and soil quality characteristics of the Yellow River Delta during different reclamation years (i.e., 0a, 1a, 5a, 10a, and 20a) using principal component analysis (PCA) and the Soil Quality Index (SQI). The findings indicated that the soil salt content (SSC) significantly decreased (p < 0.05) from 6.60 g/kg in the initial reclamation year (0a) to 1.63 g/kg in the 10th year (10a) and then slightly increased to 2.85 g/kg in the 20th year (20a). Consequently, the soil salinity level shifted from saline soil to slight salinity and then increased to medium salinity. Ammonium nitrogen (NH4+-N) notably increased by 8.31 mg/kg during the first five years of reclamation (0a to 5a) and gradually decreased by 2.56 mg/kg in the 20th year (20a). On the other hand, nitrate nitrogen (NO3−-N) experienced a significant decrease of 2–5 times after reclamation but continued to increase by 8.96 mg/kg with subsequent reclamation years. The available nitrogen (AN), available phosphorus (AP), and soil organic carbon (SOC) exhibited a significant increase of 24.87 mg/kg, 10.11 mg/kg, and 6.76 g/kg, respectively, with increasing reclamation years. However, available potassium (AK) gradually decreased after reclamation and then increased in the 20th year (20a). The values of SQI for different reclamation years were 0.307 for 0a, 0.339 for 1a, 0.320 for 5a, 0.318 for 10a, and 0.327 for 20a, indicating an increasing trend with increasing reclamation years. It was discovered that long-term reclamation significantly reduced soil salinity and improved soil quality, leading to the sustainable development of reclaimed saline soils in the Yellow River Delta.

show abstract

“…The Yellow River estuary wetland is focused by previous studies on micro-habitat types, biogeochemical processes, and eco-functions of wetlands (Zhao et al, 2010;Yu et al, 2018;Gong et al, 2021). Several recent studies have found that bacteria communities have existed in great variations, which were relevant to geographic patterns, season variations, plant types, and soil salinities (Lv et al, 2016;Zhang et al, 2017;Zhang et al, 2020;Li et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Soil Bacterial Community Structure in Different Micro-Habitats on the Tidal Creek Section in the Yellow River Estuary

Wang

Yang

et al. 2022

Front. Ecol. Evol.

View full text Add to dashboard Cite

Tidal creeks have attracted considerable attention in estuary wetland conservation and restoration with diverse micro-habitats and high hydrological connectivity. Bacterial communities act effectively as invisible engines to regulate nutrient element biogeochemical processes. However, few studies have unveiled the bacterial community structures and diversities of micro-habitats soils on the tidal creek section. Our study selected three sections cross a tidal creek with obviously belt-like habitats “pluff mudflat – bare mudflat – Tamarix chinensis community – T. chinensis-Suaeda salsa community– S. salsa community” in the Yellow River estuarine wetland. Based on soil samples, we dissected and untangled the bacterial community structures and special bacterial taxa of different habitats on the tidal creek section. The results showed that bacterial community structures and dominant bacterial taxa were significantly different in the five habitats. The bacterial community diversities significantly decreased with distance away from tidal creeks, as well as the dominant bacteria Flavobacteriia and δ-Proteobacteria, but in reverse to Bacteroidetes and Gemmatimonadetes. Moreover, the important biomarkers sulfate-reducing bacteria and photosynthetic bacteria were different distributions within the five habitats, which were closely associated with the sulfur and carbon cycles. We found that the bacterial communities were heterogeneous in different micro-habitats on the tidal creek section, which was related to soil salinity, moisture, and nutrients as well as tidal action. The study would provide fundamental insights into understanding the ecological functions of bacterial diversities and biogeochemical processes influenced by tidal creeks.

show abstract

Parameterizing the Yellow River Delta tidal creek morphology using automated extraction from remote sensing images

Cited by 17 publications

References 52 publications

Quantitative Analysis of Tidal Creek Evolution and Vegetation Variation in Silting Muddy Flats on the Yellow Sea

Quantitative Analysis of Tidal Creek Evolution and Vegetation Variation in Silting Muddy Flats on the Yellow Sea

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

Soil Bacterial Community Structure in Different Micro-Habitats on the Tidal Creek Section in the Yellow River Estuary

Contact Info

Product

Resources

About