International Journal of Sediment Research最新文献

{"title":"Using Cs-137 measurements and RUSLE model to explore the effect of land use changes on soil erosion and deposition rates in a mid-sized catchment in southern Italy","authors":"Paolo Porto ,&nbsp;Giovanni Callegari ,&nbsp;Abid Ouadja ,&nbsp;Ernesto Infusino","doi":"10.1016/j.ijsrc.2023.11.004","DOIUrl":"10.1016/j.ijsrc.2023.11.004","url":null,"abstract":"<div><p>In some areas of southern Italy, the change in land use over the last 4–5 decades has increased pressure on land and water resources and caused different forms of soil degradation. In order to mitigate the magnitude of soil erosion, different strategies that include construction of flood control structures and reforestation programs have been done in several areas. However, quantifying the effectiveness of these strategies is difficult in absence of direct measurements of soil erosion. To cover this information gap, the use of distributed numerical models coupled with measurements of the radionuclide cesium-137 (¹³⁷Cs) offers a good alternative to the classic experimental sites (plot, catchments) that, on the contrary, require long term datasets to produce reliable estimates of soil loss. In this paper, measurements of ¹³⁷Cs in a floodplain area are firstly described for a representative Calabrian catchment as an example to reconstruct the trend of soil deposition rates during the last six decades. These measurements have been integrated with estimates of soil loss obtained with the Revised Universal Soil Loss Equation (RUSLE) model for which land use maps of different periods are available. The final comparison between estimates of soil erosion provided by the RUSLE at catchment scale and sedimentation rates derived from ¹³⁷Cs measurements on depositional areas allowed interesting information on the trend of soil erosion and deposition rates in these areas to be obtained.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 2","pages":"Pages 167-177"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627923000719/pdfft?md5=cf0327d6b051b93a469dc4e21ca2332c&pid=1-s2.0-S1001627923000719-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TOC","authors":"","doi":"10.1016/S1001-6279(24)00025-8","DOIUrl":"https://doi.org/10.1016/S1001-6279(24)00025-8","url":null,"abstract":"","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 2","pages":"Pages ii-iii"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627924000258/pdfft?md5=a63452edf4550e760bf1ef3b06d92bf6&pid=1-s2.0-S1001627924000258-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140558332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preliminary assessment of the suspended sediment dynamics in the Sikkim–Darjeeling Himalayan river","authors":"Paweł Prokop","doi":"10.1016/j.ijsrc.2023.08.005","DOIUrl":"10.1016/j.ijsrc.2023.08.005","url":null,"abstract":"&lt;div&gt;&lt;p&gt;The Sikkim–Darjeeling Himalaya region receives the highest amount of rainfall along the whole southern Himalayan margin and is known for the occurrence of extreme hydrometeorological and geomorphological events. The massive amounts of water and sediment transported each year through the mountain part of the Teesta River drainage system (∼8,150 km&lt;sup&gt;2&lt;/sup&gt;)––the largest river in the region––have been severely impacted by dam construction in recent decades. The aim of the current study was to determine, for the first time in this part of the Himalaya region, the dynamics of suspended sediment transfer at a number of points distributed through the mountainous part of the Teesta River catchment prior to dam construction and preliminarily assess the impact of dam operations on the suspended sediment. Sediment sources were identified using a database of landslide inventories from 1965 to 2019, combined with visual interpretation of satellite imagery from the U.S. Corona programme and Google Earth. Hydrological and sediment data up to the second half of the 1990s were used to reconstruct the discharge and suspended sediment dynamics before direct human intervention in the river channels. The beginning and end of the construction of the reservoirs was determined by analyzing satellite images. The impact of dam operations on the suspended sediment was compiled from the available literature. The results of the current study indicate that the primary sources of sediment are landslides caused by the interaction of rainfall and road undercutting of slopes as well as channel erosion. During extreme rainfall events, the influence of deforested areas in the mobilization and delivery of sediment to the river network increases. The current analysis reveals that reconstruction of the suspended sediment dynamics should take into account the course of extreme events responsible for supplying material to the river network, as well as the long-term remobilization of already deposited sediment in the river channel. It was found that the mean suspended sediment load (SSL) following extreme rainfall, flooding, and landslides in the Teesta River catchment can be up to four times higher than its average values for the same catchment unaffected by such an event, and the effects can be observed for more than a decade afterwards. Under these conditions, the mean suspended sediment yield can reach 12,000 and up to 20,000 t/(km&lt;sup&gt;2&lt;/sup&gt;·y) in individual years, which is among the highest in the Himalaya region and, indeed, the world. The construction of 13 dams in the last 30 years has disrupted the hydrological regime and sediment transport in the Teesta River catchment along 70% of its main course and largest tributaries, and this has resulted in the selective retention of coarser material in the reservoirs and a reduction in the SSL in the Himalayan piedmont. The high density of the dams suggests that further transport of suspended sediment will depend on the eff","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 2","pages":"Pages 184-193"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627923000537/pdfft?md5=20d73db2baecc042fc43ed19e995938b&pid=1-s2.0-S1001627923000537-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135200834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Palynofacies and sediment texture response from sub-tropical mixed sub-urban to urban floodplains of the Gomati River, Lucknow, India","authors":"Pooja Tiwari ,&nbsp;Purnima Srivastava ,&nbsp;Biswajeet Thakur","doi":"10.1016/j.ijsrc.2024.01.003","DOIUrl":"10.1016/j.ijsrc.2024.01.003","url":null,"abstract":"<div><p>Hydromorphodynamic interactions with vegetation are a part of fluvial biomorphodynamics in actively meandering rivers. Using palynofacies and grain size from sub-urban to urban reaches across the river valley, the spatial patterns of organic matter behavior are examined in a 38 km reach of the Gomati River in Lucknow District, Uttar Pradesh, India. This is done to understand how they respond to the alteration, preservation, and degradation after getting transported and deposited in sediment. Thirteen surface sediment samples of the Gomati River floodplain were analyzed for palynofacies and grain size to ascertain its fate in this reach, which comprises the big picture for past human settlement. The shifts in the proportions of palynofacies associations, i.e., phytoclasts, palynomorphs, and amorphous organic matter (AOM) along with grain size, are considered to visualize the depositional process. The CONISS cluster analysis revealed four zones reflecting high degradation and alteration of palynofacies in the urban regime compared to the sub-urban reaches where the low interference with natural settings illustrates the low deterioration of palynofacies. The relation between grain size and palynofacies was obtained using Principal Component Analysis (PCA) to emphasize the correlation with palynofacies in the meandering fluvial system of the Gomati River. In the floodplain deposits, the behavior of palynofacies, allows for the distinction of the regional aspects of fluvial sediment disposition. The current study compares urban and sub-urban settlement premises of today's communities and contributes to the understanding of the growth, dispersal, and decline of earlier human settlements.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 2","pages":"Pages 276-290"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S100162792400009X/pdfft?md5=22bf1b1a88edfb155d3c3ab01bdf9b4b&pid=1-s2.0-S100162792400009X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139649145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydraulics and bedload in unsteady flow: Example of the Volga River","authors":"Gennadii Gladkov ,&nbsp;Viktor Katolikov ,&nbsp;Pakhom Belyakov ,&nbsp;Polina Rzhakovskaya ,&nbsp;Vitaly Zamyshlyaev","doi":"10.1016/j.ijsrc.2024.01.004","DOIUrl":"10.1016/j.ijsrc.2024.01.004","url":null,"abstract":"<div><p>The current paper deals with the navigable section of the Volga River tailwater of the Nizhny Novgorod Hydropower Plant. To ensure navigation in this area, the existing navigation structures are being reconstructed and an additional chamber of the Gorodets Navigation Lock is to be constructed, and an extended navigable channel in the Volga River is to be created. To assess the impact of the planned measures on hydrological and riverbed regimes, the hydromorphological situation has been analyzed, and the flow parameters and the water level regime in the tailwater pool of the hydro system have been studied. An analysis of the changes in the riverbed along the design channel path was done and the kinematics of the flow and sediment transport parameters were studied under conditions of unsteady water movement resulting from the daily regulation of the river flow. Numerical experiments have revealed the peculiarities of river sediment movement under conditions of unsteady water movement, and recommendations for modeling river bed deformation under such conditions have been developed. It was found that with daily and weekly regulation of river, discharge bedload transport becomes more active at the moment when a wave of daily release from the upper reaches of the hydrosystem passes through. The basic characteristics of bedload transport, i.e., dune velocity and bedload rate, increase in comparison with a steady water flow. Under the conditions of unsteady water movement due to the daily regulation of the river flow, there are no strong changes in the size of the bottom dunes, while their velocity, and, consequently, the bedload rate increases significantly during periods when the wave of daily water releases from upstream passes. The results obtained indicate that for hydraulic calculations of the characteristics of water movement and sediment transport, it is necessary to use data from hourly observations of flow rates and water levels. It was found that during the passage of release waves under daily flow regulation, there are short periods of increase in Froude number values. Similarly, the bedload rate increased during these periods compared to the average daily values. The result of this comparison ultimately led to the recommendation that daily flow regulation should be abandoned in order to reduce the intensity of bedload transport rate and channel erosion in the tailwater of the hydrosystem.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 2","pages":"Pages 209-221"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627924000118/pdfft?md5=7399bdccb3f36a07fc3da94c9e78e3bf&pid=1-s2.0-S1001627924000118-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139689626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"River system sediment flow modeling using artificial neural networks","authors":"Tushar Khankhoje,&nbsp;Parthasarathi Choudhury","doi":"10.1016/j.ijsrc.2023.11.006","DOIUrl":"10.1016/j.ijsrc.2023.11.006","url":null,"abstract":"<div><p>Sediment leads to problems with navigation, agricultural productivity, and water pollution. The study of sediment flow in river reaches, which is a non-linear and complex process, is, thus, essential to addressing these issues. The application of artificial neural networks (ANN) to such problems needs to be investigated. For unsteady flow in a river system, river reach storage is an important variable that needs to be considered in data-driven models. However, previous research on sediment modeling did not involve the explicit use of storage variables in such models as is investigated in the current study. In the current study, storage variables have been explicitly (Model 2) used to predict the output state of the system at time ‘<em>t</em> + 1’ from the input state at time ‘<em>t</em>’ using ANNs. Sediment discharge at six gaging stations on the Mississippi River system, USA, has been considered as the state variable. The model has been compared with a model considering implicit variation of the storage parameter in the river system (Model 1). Dynamic ANNs are used for time-series datasets, which are more suitable for incorporating the sequential information within the dataset. Focussed gamma memory neural networks have been used in the current study. The numbers of hidden layers and hidden nodes, activation function, and learning rate have been varied step by step to obtain the optimal ANN configurations. The best selected input–output variables are those used in Model 2 as it performed slightly better than the other model in terms of Nash–Sutcliffe efficiency coefficient (CE) values. Model performance evaluated using normalized root mean square error (NRMSE) and CE shows satisfactory results. NRMSE was &lt; 10% for all the outputs except for the Venedy and Murphysboro locations and CE values for sediment loads were &gt; 0.45 for all locations except Murphysboro indicating acceptable performance by both the models. The models proved highly efficient (CE &gt; 0.80, i.e., very good predictions) for predicting sediment discharge at locations along the main river channel with acceptable accuracy (CE &gt; 0.45) for other locations and the storage change for the river system. These models can be used for real-time forecasting and management of sediment-related problems.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 2","pages":"Pages 222-229"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627923000732/pdfft?md5=928d7bab1a5349e77970dfd200c8008d&pid=1-s2.0-S1001627923000732-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Past, present, and future of River Sediment Quality and Quantity: Introduction to the special issue","authors":"Sergey Chalov,&nbsp;Kristina Prokopeva,&nbsp;Michal Habel","doi":"10.1016/j.ijsrc.2024.04.001","DOIUrl":"https://doi.org/10.1016/j.ijsrc.2024.04.001","url":null,"abstract":"","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 2","pages":"Pages 165-166"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627924000350/pdfft?md5=530d2b02095dd56b95a0b548bf6d5c8d&pid=1-s2.0-S1001627924000350-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140558333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved estimation of critical bed shear stress downstream of low-head weirs in streams with coarse bed material","authors":"Anbin Li ,&nbsp;Bruce W. Melville ,&nbsp;Yifan Yang ,&nbsp;Liyao Gao ,&nbsp;Asaad Y. Shamseldin ,&nbsp;Genguang Zhang","doi":"10.1016/j.ijsrc.2024.03.009","DOIUrl":"10.1016/j.ijsrc.2024.03.009","url":null,"abstract":"<div><p>Existing methods for estimating critical bed shear stress are limited and usually do not consider local scour processes; therefore, the accuracy of numerical modeling is usually compromised. This paper presents the results of physical experiments on scour downstream of low-head weirs and proposes new equations for estimating the critical bed shear stress in scour holes. The experiments were done using a camel hump weir and coarse-bed materials which are applicable to steep streams with coarse-bed materials (gravel, rocks, etc.). The critical shear stress was regarded as the bed shear stress within the scour holes, which was determined using the three-dimensional (3D) flow field and bed morphology measured at the equilibrium scour state. The influence of the sediment size also was investigated. The experimental results showed that a scour hole can be divided into three zones: Zone-I for the upstream scour slope, Zone-II for the downstream scour slope, and Zone-III for the downstream slope of the sediment deposit downstream of the hole. The relation between the critical shear stress of the bed surface in Zone-I, the flow rate, and bed position was established, and the new equations yielded better accuracy than existing methods. In addition, the relation between the critical shear stress and the slope of the bed and the ratio of the local water depth to the particle size in Zone-II and Zone-III were established. After verification, the calculation results of the newly proposed equations were in good agreement with the standard values of the dimensionless critical Shields parameter obtained through processing the experimental results in the current study. Further discussion is provided regarding the integration of the parameters calculated applying the new parameters in the numerical models.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 3","pages":"Pages 340-354"},"PeriodicalIF":3.6,"publicationDate":"2024-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627924000349/pdfft?md5=2b8a59cc5c614cbece68a6d0fbe3f3b7&pid=1-s2.0-S1001627924000349-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Post-fire erosion and sediment yield in a Mediterranean forest catchment in Italy","authors":"Giovanni Mastrolonardo ,&nbsp;Giulio Castelli ,&nbsp;Giacomo Certini ,&nbsp;Melanie Maxwald ,&nbsp;Paolo Trucchi ,&nbsp;Cristiano Foderi ,&nbsp;Alessandro Errico ,&nbsp;Elena Marra ,&nbsp;Federico Preti","doi":"10.1016/j.ijsrc.2024.03.008","DOIUrl":"10.1016/j.ijsrc.2024.03.008","url":null,"abstract":"<div><p>Wildfires are an increasingly alarming phenomenon that affects forests and agroecosystems, generating several cascade effects among which soil erosion is one of the most deleterious. A robust body of data-based evidence on post-fire soil erosion and sediment yield at the watershed scale is, thus, required, especially when dealing with areas where wildfires are particularly frequent, such as the Mediterranean basin. This study analyzes the impact of the first rains after a large wildfire in terms of soil erosion and sediment yield at the watershed scale in a Mediterranean area, the Pisan Mountains, central Italy. Here about 1,000 ha of olive groves, maquis, maritime pine, and chestnut forests, all on steep slopes, burned in 2018. Fire (or burn) severity was mapped by remote sensing and checked by a field survey. Sediment yield was assessed by sampling earthy materials deposited upstream of a check dam at the outlet of the studied watershed. Finally, a hydrological model was developed in the hydrologic engineering center–hydrological modelling system (HEC–HMS) environment to explore the relationship between the erosion–deposition events observed in the watershed and the rainfall-induced hydrological processes. The first two post-fire rainy events relocated a high mass of sediment, mostly non-organic and characterized by light color, perhaps already in the stream before fire, while the subsequent four rain showers deposited materials rich in pyrogenic organic matter. Overall, the soil erosion caused by these six major rainfall events–the larger of which had a return time of one year–was estimated to amount to 7.85 t/ha (0.26 mm in the watershed), corresponding to 42% of the watershed average annual potential erosion rate in unburned conditions. This value is lower than expected, and, overall, moderate if compared to other Mediterranean case studies, possibly because of the nature of soils in the watershed, i.e., shallow and stony, thus, poor in fines prone to erosion.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 3","pages":"Pages 464-477"},"PeriodicalIF":3.6,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627924000337/pdfft?md5=0b3eb8699031f796471bb13307462313&pid=1-s2.0-S1001627924000337-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards an understanding of southern peri-Pannonian lacustrine depositional cycles: Interplay of sediment delivery and shifting intrabasinal height, a case study of drilled Neogene sediments from northwest Toplica Basin (Central Serbia)","authors":"Marija Radisavljević ,&nbsp;Nikola Burazer ,&nbsp;Aleksandra Šajnović ,&nbsp;Darko Spahić ,&nbsp;Gordana Gajica ,&nbsp;Sabina Kovač ,&nbsp;Violeta Gajić ,&nbsp;Branimir Jovančićević","doi":"10.1016/j.ijsrc.2024.03.006","DOIUrl":"10.1016/j.ijsrc.2024.03.006","url":null,"abstract":"&lt;div&gt;&lt;p&gt;A multidisciplinary approach allowed the reconstruction of the shallow, highly complex Neogene lacustrine-type sedimentological interplay between the peri-Pannonian (sub)basin subsidence and its seafloor topography. The current study further discusses the mechanism of localized uplift and subsidence by analyzing depositional cycles of middle Miocene sediments drilled in a northwestern or shallower Toplica Basin depocenter (borehole BL4, depth up to 630 m; Central Serbia). Supported by recent constraints on a deeper basinal section of eastern and western subbasin depocenters, the composite study of the segmented Toplica Basin involved geological, sedimentological, mineralogical, inorganic, and organic geochemical analysis, as well as constraints on interchanging geodynamic drivers. The data were extracted from thirty-one selected samples from four sedimentary lithomembers: A, B, C, and D. The architecture of these deposits reflects an intricate pattern influenced by complex lake bottom and subsurface geology (dis)connecting the two depocenters. The investigated Neogene deposition, as a whole, was dominantly controlled by a lithospheric-scale extensional graben system (involving the Jastrebac core complex-type tectonic exhumation) developed on top of the underlying Serbo-Macedonian basement unit. The crustal extension allowed rapid material inflow from other exposed sequences of the juvenile basin, including the abutting surface exposures. During the initial stretching and basin subsidence stage, sediment inflow towards the eastern Toplica depocenter was hindered. The influx of surface-eroded material was interrupted by a natural “obstacle”. In turn, such a configuration facilitated voluminous material transport into the western depocenter of the basin, thereby controlling the deposition of lithomembers A and B. After the deposition of lithomember B ceased, the “barrier”, or likely intrabasinal structural high, contributed to a reversal of the former westward-directed transport. In that manner, the vertical movements of the structural high enabled material transfer typical for the eastern basin segment, consequently prompting a sedimentary development of the lithomembers C and D.&lt;/p&gt;&lt;p&gt;In this context, mineralogical and geochemical differences between the sequences are used as tracers of depositional changes affected by tectonic events. Sequences of sand and gravel layers of upper lithomembers C and D pointed out that alluvial processes strongly influenced their depositional cycle. On the other hand, a more pronounced presence of sulfide minerals (pyrite concretions) in lithomembers A and B correlated with a calm and anoxic paleoenvironment. The elevated trend of mixed terrigenous and/or microbiologically reworked organic matter (higher carbon/nitrogen (C/N) ratio and terrigenous/aquatic (TAR) ratio, the lower sum of steroids/sum of hopanoids (S/H)) ratio, deposited under anoxic–dysoxic freshwater lacustrine conditions (higher pristane/phyt","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":"39 3","pages":"Pages 401-420"},"PeriodicalIF":3.6,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1001627924000313/pdfft?md5=2b4632e103cfb126e2480c15e5ff9a54&pid=1-s2.0-S1001627924000313-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}