Artificial water sediment regulation scheme influences morphology, hydrodynamics and nutrient behavior in the Yellow River estuary

Xu, Bochao; Yang, Disong; Burnett, William C.; Ran, Xiangbin; Yu, Zhigang; Gao, Maosheng; Diao, Shu; Jiang, Xueting

doi:10.1016/j.jhydrol.2016.05.024

Cited by 49 publications

(17 citation statements)

References 40 publications

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“…A small delta was high SSSC center in the river mouth which newly formed after the 2013 'Water Sediment Regulation Scheme'. The delta altered SSSC distribution patterns within the estuary from a single plume to a two-plume pattern (Xu et al, 2016).…”

Section: Sssc Inversion Results Based On the Novel Cubic Modelmentioning

confidence: 98%

Remote sensing retrieval of surface suspended sediment concentration in the Yellow River Estuary

Zhan

Wang

et al. 2017

Chin. Geogr. Sci.

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Accurate assessment of surface suspended sediment concentration (SSSC) in estuary is essential to address several important issues: erosion, water pollution, human health risks, etc. In this study, an empirical cubic retrieval model was developed for the retrieval of SSSC from Yellow River Estuary. Based on sediments and seawater collected from the Yellow River and southeastern Laizhou Bay, SSSC conditions were reproduced in the laboratory at increasing concentrations within a range common to field observations. Continuous spectrum measurements of the various SSSCs ranging from 1 to 5700 mg/l were carried out using an AvaField-3 spectrometer. The results indicated the good correlation between water SSSC and spectral reflectance (R rs) was obtained in the spectral range of 726-900 nm. At SSSC greater than 2700 mg/L, the 740-900 nm spectral range was less susceptible to the effects of spectral reflectance saturation and more suitable for retrieval of high sediment concentrations. The best correlations were obtained for the reflectance ratio of 820 nm to 490 nm. Informed by the correlation between R rs and SSSC, a retrieval model was developed (R 2 = 0.992). The novel cubic model, which used the ratio of a near-infrared (NIR) band (740-900 nm) to a visible band (400-600 nm) as factors, provided robust quantification of high SSSC water samples. Two high SSSC centers, with an order of 10 3 mg/l, were found in the inversion results around the abandoned Diaokou River mouth, the present Yellow River mouth to the abandoned Qingshuigou River mouth. There was little sediment exchange between the two high SSSC centers due to the directions of the residual currents and vertical mixing.

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Section: Sssc Inversion Results Based On the Novel Cubic Modelmentioning

confidence: 98%

Remote sensing retrieval of surface suspended sediment concentration in the Yellow River Estuary

Zhan

Wang

et al. 2017

Chin. Geogr. Sci.

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“…River regulation such as WSRS results in biogeomorphic variation of estuarine saltmarshes in surface elevation, inundation and salinity (Han et al, 2018;Yang et al, 2020), and the resultant response of plant species to changing environments is complicated (Carle et al, 2015;Snedden et al, 2015). The artificial controls on water and sediment input may cause regime shifts in morphological evolution of estuaries and deltas, such as progradation of delta lobes and crevasse splays vs. avulsions (Nienhuis et al, 2018;Gao et al, 2019), which could further affect estuarine biogeomorphic environments (Xu et al, 2016). In previous studies, Keogh et al (2019) and Nienhuis et al (2018) have reported that the crevasse splays were conducive to generation of new land and variations of biogeomorphic conditions in estuaries, due to the water and sediment channeled along the crevasse splays.…”

Section: Discussionmentioning

confidence: 99%

Effects of the Water-Sediment Regulation Scheme on the Expansion of Spartina alterniflora at the Yellow River Estuary, China

Zheng

Gao

et al. 2021

Front. Environ. Sci.

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In recent decades, the invasion of saltmarsh plant Spartina alterniflora (S. alterniflora) over a large part of coastal wetlands in China, including the Yellow River Estuary (YRE) as a regional economic hub and global ecosystem services hotspot, has caused increasing concern because of its serious threats to native ecosystems. During the same period, local authorities have implemented a Water-Sediment Regulation Scheme (WSRS) in the Yellow River for flood mitigation and delta restoration purposes. The altered hydrological regime has resulted in unintended changes to estuarine ecosystem. However, the direct consequence of the WSRS on the expansion of S. alterniflora remains unclear. In this study, quantitative relationship between the inter- and intra-annual expansion patterns of S. alterniflora represented by relevant landscape metrics and indicators that quantify the concurrent variations of river and sediment discharges as the proxy of the WSRS impacts were analysed over the period of Year 2011–2018, and the analyses were performed on the YRE as a whole and on five different zones subdivided based on the invasion sequence. The results showed that there was no significant difference in the inter-annual area variation of S. alterniflora between the years with and without WSRS. Compared with the years without WSRS (2016–2017), the intra-annual (monthly) increment of the various landscape metrics [i.e., NP (number of patches), CA (class area), LPI (largest patch index) and AI (aggregation index] were found to be significantly higher in the initial stage of peak growing season (June-July) than in the mid- and late stages (July-September) in the years with WSRS (2011–2015, 2018) in the subregion located close to the south bank of YRE as the most prominent impact zone. In addition, F (mean flow), Ff (number of high flow pulses), Tf (Julian date of maximum flow) and D (duration of WSRS) were identified as the explanatory variables for the intra-annual vegetation landscape pattern changes, and their relative contributions to resultant changes were also assessed. Our results broaden the understanding of estuarine hydrological disturbance as a potential driver regulating the saltmarsh vegetation, and also have implications for S. alterniflora invasion control at estuaries under changing environment.

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“…Changing fluvial water and sediment fluxes exert a key effect on river ecosystems [1,2] and their management [3]. Such changes represent critical aspects of global change [4], also affecting delta evolution and sustainability [5,6] and aquatic organisms' habitats [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Global trends in water and sediment fluxes of the world’s large rivers

Chang

et al. 2020

Science Bulletin

189

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Implications of water-sediment co-varying trends in large rivers Science Bulletin 65, 4 (2020); Water demand for ecosystem protection in rivers with hyper-concentrated sediment-laden flow Science in China Series E-Technological Sciences 47, 186 (2004); Water demand for ecosystem protection in rivers with hyper-concentrated sediment-laden flow Science in China Series E-Technological Sciences 47, 186 (2004); Regional variation of sediment load of Asian rivers flowing into the ocean Science in China Series B-Chemistry 44, 23 (2001); Sr fluxes and isotopic compositions of the eleven rivers originating from the Qinghai-Tibet Plateau and their contributions to 87 Sr/ 86 Sr evolution of seawater

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Artificial water sediment regulation scheme influences morphology, hydrodynamics and nutrient behavior in the Yellow River estuary

Cited by 49 publications

References 40 publications

Remote sensing retrieval of surface suspended sediment concentration in the Yellow River Estuary

Remote sensing retrieval of surface suspended sediment concentration in the Yellow River Estuary

Effects of the Water-Sediment Regulation Scheme on the Expansion of Spartina alterniflora at the Yellow River Estuary, China

Global trends in water and sediment fluxes of the world’s large rivers

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