Geomorphic criteria for distinguishing and locating abandoned channels from upstream part of Mun River, Khorat Plateau, northeastern Thailand

Nimnate, Parisa; Choowong, Montri; Thitimakorn, Thanop; Hisada, Ken‐ichiro

doi:10.1007/s12665-017-6657-y

Cited by 8 publications

(20 citation statements)

References 20 publications

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“…From upstream to downstream, the δ 56 Fe showed a downward trend as a whole. Compared with the δ 56 Fe in the wet These data are from [16,24,38,63].…”

Section: Discussionmentioning

confidence: 99%

“…Thailand has a large population and its economy dependents on agriculture. The main type of land use is arable land [37], most of which is paddy fields [38,39]. The main rock types of the MRB are clastic rocks and clastic rocks with evaporite, and sporadic igneous rocks existed only in the southern of the MRB [37].…”

Section: Study Regionmentioning

confidence: 99%

“…In summary, the chelation of organic matter with heavy Fe isotopes was one of the important sources of heavy Fe isotopes in river water in different climate zones. These data are from [16,24,38,63].…”

Section: Influence Of Doc On the Dfe Isotopesmentioning

confidence: 99%

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Geochemical and Seasonal Characteristics of Dissolved Iron Isotopes in the Mun River, Northeast Thailand

Xiao

Han

Zeng

et al. 2022

Water

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Dissolved iron (Fe) isotopes in river water have a pivotal role in understanding the Fe cycle in the surficial environment. A total of 13 samples of river water were collected from the Mun River to analyze the Fe isotopes and their controlling factors in river water, such as dissolved organic carbon (DOC) and different supply sources. The results showed that dissolved Fe (DFe) concentrations ranged from 21.49 μg/L to 232.34 μg/L in the dry season and ranged from 10.48 μg/L to 135.27 μg/L in the wet season, which might be ascribed to the dilution effect. The δ56Fe of the dry season (−0.34 to 0.57‰, with an average 0.09‰) was lower than that of the wet season (−0.15 to 0.48‰, with an average 0.14‰). Combined with the δ56Fe and DFe/DAl ratios, the end-members of DFe were identified, including rock weathering (high δ56Fe and low DFe/DAl ratio), anthropogenic inputs (high δ56Fe and high DFe/DAl ratio) and groundwater inputs (low δ56Fe and low DFe/DAl ratio). The relationship between δ56Fe and DOC concentrations suggested that the chelation of organic matter with heavy Fe isotopes was one of the important sources of heavy Fe isotopes in river water.

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“…From upstream to downstream, the δ 56 Fe showed a downward trend as a whole. Compared with the δ 56 Fe in the wet These data are from [16,24,38,63].…”

Section: Discussionmentioning

confidence: 99%

Section: Study Regionmentioning

confidence: 99%

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Geochemical and Seasonal Characteristics of Dissolved Iron Isotopes in the Mun River, Northeast Thailand

Xiao

Han

Zeng

et al. 2022

Water

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“…Briefly, the Mun River lies in the northeast of Thailand between latitudes 14° N to 16° N and longitudes 101°30′ E to 105°30′ E (Figure 1a), the total area is 71,060 square kilometers. It is one of the right tributaries of the Mekong River [24,25]. Thailand is a traditional agricultural country, and agriculture is the largest sector of the economy.…”

Section: Methodsmentioning

confidence: 99%

Hydrochemistry and Dissolved Inorganic Carbon (DIC) Cycling in a Tropical Agricultural River, Mun River Basin, Northeast Thailand

Han

Song

et al. 2019

IJERPH

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Dissolved inorganic carbon isotope composition (δ13CDIC), together with major ion concentrations were measured in the Mun River and its tributaries in March 2018 to constrain the origins and cycling of dissolved inorganic carbon. In the surface water samples, the DIC content ranged from 185 to 5897 μmol/L (average of 1376 μmol/L), and the δ13CDIC of surface water ranged from −19.6‰ to −2.7‰. In spite of the high variability in DIC concentrations and partial pressure of carbon dioxide (pCO2), the δ13CDIC values of the groundwater were relatively consistent, with a mean value of −16.9 ± 1.4‰ (n = 9). Spatial changes occurred in the direction and magnitude of CO2 flux through water-air interface (FCO2). In the dry season, fluxes varied from −6 to 1826 mmol/(m2·d) with an average of 240 mmol/(m2·d). In addition to the dominant control on hydrochemistry and dissolved inorganic carbon isotope composition by the rock weathering, the impacts from anthropogenic activities were also observed in the Mun River, especially higher DIC concentration of waste water from urban activities. These human disturbances may affect the accurate estimate contributions of carbon dioxide from tropical rivers to the atmospheric carbon budgets.

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“…This facies is commonly considered to represent the channel-fill deposits being the major architectural element of fluvial system (e.g. Bristow et al, 1999;Bridge, 2003;Best et al, 2006;Hickin et al, 2009;Nimnate et al, 2017aNimnate et al, , 2017b. It is found in longitudinal and transverse sections.…”

Section: ) Facies V: Facies Assemblage With Channel-shaped Lower Boundarymentioning

confidence: 99%

Late Pleistocene Climate Variation On The Khorat Plateau, Northeastern Thailand Inferred From The Remnants Of Sand Dunes

Ngernkerd¹,

Choowong²,

Choowong³

et al. 2021

BGSM

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The preservation of terrestrial dune field in a tropical region is rare and relies significantly on the degree of weathering process, humidity and anthropogenic condition. In this paper, we report the remnants of sand dunes that is uncovered from Thungkula Ronghai (TKR) dune field in the southern part of the Khorat Plateau, northeastern Thailand. We reveal, for the first time, the results of systematic geomorphological, sedimentological and chronological analyzes of barchanoid ridges and parabolic dunes found on terraces of the Mun and the Chi Rivers. Interpretation in a series of 1952 aerial photographs, satellite images coupled with Ground Penetrating Radar (GPR) survey, and optically stimulated luminescence (OSL) dating were applied. As a result, we found remnants of mega-barchanoid ridges and isolated parabolic dunes varying in height from 1-2 m with maximum length of 4 km, locally distributed in between terraces of the Mun and Chi Rivers, the middle to eastern part of TKR. Dune shapes include lobate, en-echelon and elongate partially overlying on crevasse sand splay, meandered scar, paleo-channel, mid-channel bar of the fluvial depositional sequences. Orientation of all dunes is in NW-SE direction reflecting the formation was due to the prevailing NW monsoon wind. Transition from barchanoid ridge to parabolic dune was observed. Preliminary OSL dating reveals the deposition of sand dunes occurred between 45 to 28 ka. This age range can be inferred to a warmer and drier period occurred in Marine Isotope Stage 3 (MIS3) before the Last Glacial Maximum.

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Geomorphic criteria for distinguishing and locating abandoned channels from upstream part of Mun River, Khorat Plateau, northeastern Thailand

Cited by 8 publications

References 20 publications

Geochemical and Seasonal Characteristics of Dissolved Iron Isotopes in the Mun River, Northeast Thailand

Geochemical and Seasonal Characteristics of Dissolved Iron Isotopes in the Mun River, Northeast Thailand

Hydrochemistry and Dissolved Inorganic Carbon (DIC) Cycling in a Tropical Agricultural River, Mun River Basin, Northeast Thailand

Late Pleistocene Climate Variation On The Khorat Plateau, Northeastern Thailand Inferred From The Remnants Of Sand Dunes

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