The evolution of the modern Luanhe River delta, north China

Feng, Jing-Chun; Zhang, Wen

doi:10.1016/s0169-555x(98)00066-x

Cited by 26 publications

(6 citation statements)

References 1 publication

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“…The modern coastal plain was formed through the accumulation of the highstand prograding delta on top of Holocene marine strata, together with artificial fill. In addition, lagoons are important components of the Luanhe River delta (Feng and Zhang, 1998). Based on the records of lagoon facies in the published cores for this region, the approximate distribution range of the buried lagoon is shown as a purple dashed line in Fig.…”

Section: Sedimentary Evolution Since the Late Pleistocenementioning

confidence: 99%

Saline groundwater evolution in the Luanhe River delta (China) during the Holocene: hydrochemical, isotopic, and sedimentary evidence

Dang

Gao

Wen

et al. 2022

Hydrol. Earth Syst. Sci.

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Abstract. Since the Quaternary Period, paleo-seawater intrusions have been suggested to explain the observed saline groundwater that extends far inland in coastal zones. The Luanhe River delta (northwest coast of the Bohai Sea, China) is characterized by the distribution of saline, brine, brackish, and fresh groundwater from the coastline inland. The groundwater in this region exhibits a wide range of total dissolved solids (TDS): 0.38–125.9 g L−1. Meanwhile, previous studies have revealed that this area was significantly affected by Holocene marine transgression. This study used hydrochemical, isotopic, and sedimentological methods to investigate groundwater salinization processes in the Luanhe River delta and its links to paleo-environmental settings. Isotopic results (2H, 18O, 14C) allowed old groundwater recharge to be distinguished from new groundwater recharge. Hydrochemical analysis using the PHREEQC code indicated that the salt in saline and brine groundwater originates from a marine source. The 18O–Cl relationship diagram yields three-end-member groundwater mixing, and two mixing scenarios are suggested to explain the freshening and salinization processes in the study area. When this was interpreted along with data from paleo-environmental sediments, we found that groundwater salinization may have occurred since the Holocene marine transgression. The brine is characterized by radiocarbon activities of ∼ 50–85 pMC and relatively depleted stable isotopes, which are associated with seawater evaporation in the ancient lagoon during delta progradation and mixing with deeper fresh groundwater, which was probably recharged in the cold Late Pleistocene. The brackish and fresh groundwaters are characterized by river-like stable isotope values, where high radiocarbon activities (74.3–105.9 pMC) were formed after the washing out of the salinized aquifer by surface water in the delta plain. This study presents an approach that utilizes geochemical indicator analysis with paleo-geographic reconstruction to better assess groundwater evolutionary patterns in coastal aquifers.

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Section: Sedimentary Evolution Since the Late Pleistocenementioning

confidence: 99%

Saline groundwater evolution in the Luanhe River delta (China) during the Holocene: hydrochemical, isotopic, and sedimentary evidence

Dang

Gao

Wen

et al. 2022

Hydrol. Earth Syst. Sci.

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“…Though the extent to which variations in sediment supply can impact delta sustainability is well documented (Bevington et al., 2017; Feng & Zhang, 1998; Luo et al., 2017; Panin & Jipa, 2002), local hydrodynamics, which dictate the degree to which introduced sediments are retained in the delta complex, are also important. Velocity (Burke & Stolzenbach, 1983; Leonard & Luther, 1995; Wang et al., 1993) and intensity of bottom‐generated turbulence (Christiansen et al., 2000; Kadlec, 1990; Leonard & Croft, 2006) are inversely related to vegetation stem density and distance from creek edges in salt marsh settings, and the degree to which velocity and turbulence are reduced can be directly related to the amount of biomass present in the water column (Leonard & Croft, 2006), resulting in more rapid sediment removal from the water column in more densely vegetated marsh canopies.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Controls on Sediment Delivery and Hydrodynamics in a Vegetated Tidally Influenced Interdistributary Island

et al. 2021

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River deltas are among the world's most imperiled landscapes. Their low elevations, combined with their typically low elevation gradients, make them particularly vulnerable to changes in sediment supply, eustatic sea-level rise (Cazenave & Llovel, 2010) and subsidence (Erickson, 2006), as their sustainability largely hinges on the relative balance between these factors (Syvitski, 2008). With over 500 million people

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“…The sediment concentration in the west region is higher than that in the east. concentrations decrease in general due to the reduction of sediment sources from the Luan River (Feng and Zhang, 1998). The sediment concentration in the west of Caofeidian is obviously higher than that in the east of Caofeidian.…”

Section: Suspended Load and Bed Materialsmentioning

confidence: 96%

Morphodynamic responses to the deep water harbor development in the Caofeidian sea area, China's Bohai Bay

Lü

Zuo

2009

Coastal Engineering

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The evolution of the modern Luanhe River delta, north China

Cited by 26 publications

References 1 publication

Saline groundwater evolution in the Luanhe River delta (China) during the Holocene: hydrochemical, isotopic, and sedimentary evidence

Saline groundwater evolution in the Luanhe River delta (China) during the Holocene: hydrochemical, isotopic, and sedimentary evidence

Seasonal Controls on Sediment Delivery and Hydrodynamics in a Vegetated Tidally Influenced Interdistributary Island

Morphodynamic responses to the deep water harbor development in the Caofeidian sea area, China's Bohai Bay

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