Geomorphology最新文献

{"title":"Landscape responses to differential rock uplift in the Phetchabun Mountain ranges and basin, Central Thailand: Insights from morphometric indices","authors":"Pichawut Manopkawee ,&nbsp;Thitima Wongthibet","doi":"10.1016/j.geomorph.2025.110110","DOIUrl":"10.1016/j.geomorph.2025.110110","url":null,"abstract":"<div><div>The morphometric properties of mountainous topographies result from tectonic processes, climatic conditions, and the erosional resistance of bedrock, all of which exert measurable impacts on erosional mechanisms and the resulting landscape shapes. The study used geomorphic indices to investigate how differential rock uplift imprints the shaping of the Phetchabun Mountain ranges and their adjacent basin in Central Thailand, a region characterized by complex Cenozoic tectonic activity. We used high-resolution DEMs, morphometric indices, including basin-averaged channel steepness, concavity, chi plots, and knickpoint mapping, which we evaluated across 94 watersheds along the western and eastern ranges. The results show a systematic north–south gradient in channel steepness and mean elevation, with higher values in the north reflecting stronger cumulative uplift, and lower values in the south indicating reduced rock uplift and incision. The central watersheds, however, display the strongest transient signals, as indicated by major slope-break knickpoints and convex chi plots, suggesting a response to localized fault reactivation along the Phetchabun Fault Zone. Statistical analysis confirms tectonics as the dominant control on landscape morphology, while precipitation, lithology, and sediment supply support the view that the depositional systems were mainly driven by tectonic uplift. Field-based evidence, including triangular facets, shutter ridges, offset streams, and alluvial fans, supports syn-tectonic construction and the conclusion that relative uplift is the dominant force. Overall, the findings demonstrate that tectonic uplift, expressed through both transient adjustments and cumulative long-term relief, is the primary driver of topographic evolution in the Phetchabun Mountain ranges, with implications for regional tectonic hazards and landscape development.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110110"},"PeriodicalIF":3.1,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of offshore wind flow and aeolian sand transport by artificial foredunes","authors":"Antoine Lamy ,&nbsp;Nicolas Robin ,&nbsp;Patrick A. Hesp ,&nbsp;Thomas A.G. Smyth ,&nbsp;Camille René ,&nbsp;Olivier Raynal ,&nbsp;Bertil Hebert","doi":"10.1016/j.geomorph.2025.110106","DOIUrl":"10.1016/j.geomorph.2025.110106","url":null,"abstract":"<div><div>Airflow dynamics and aeolian sand transport under offshore wind conditions have primarily been examined over relatively large coastal dunes, where dune morphology significantly alters flow structure and sediment pathways. In contrast, the role of smaller-scale, anthropogenically constructed coastal sand dunes, remains relatively understudied. This study investigates airflow patterns and sand transport over a low (&lt;2.5 m) artificial foredune in Leucate (South of France), exposed to dominant offshore winds. A high resolution network of anemometers and aeolian sand traps was deployed along a cross-shore transect during four field campaigns. Results indicate that the direction of incident offshore winds generated distinct patterns of airflow and sediment transport from the dune's lee slope to the beach. When wind approached within 20° of crest-normal, flow separation occurred on the lee side, with wind speeds reduced to 10–20 % of crest values. For angles &gt;20°, flow remained attached but deviated alongshore, with wind speeds reaching 35–50 % of crest values at the dune seaward toe. Wind velocity consistently increased seaward, enhancing sand transport toward the berm, with maximum transport rates exceeding 300 kg/m/h. This seaward-directed transport contributed to a negative sediment budget under persistent offshore wind dynamics. These findings highlight the capacity of small, artificial dunes to modify offshore wind dynamics and sediment pathways, with implications for dune management and coastal sediment budgets.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"495 ","pages":"Article 110106"},"PeriodicalIF":3.1,"publicationDate":"2025-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145665697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"No transcontinental paleo-Red River flowing to the South China Sea: A mass balance perspective","authors":"Guihong Zhang ,&nbsp;Yuntao Tian ,&nbsp;Zengjie Zhang ,&nbsp;Michael B.W. Fyhn ,&nbsp;Zhenglian Xiao ,&nbsp;Zhen Sun ,&nbsp;Peizhen Zhang","doi":"10.1016/j.geomorph.2025.110107","DOIUrl":"10.1016/j.geomorph.2025.110107","url":null,"abstract":"<div><div>The southeastern Tibetan Plateau hosts several of the world's largest rivers, such as the Yangtze, Mekong, and Salween, which are proposed to have formed by early Cenozoic breakup of a Mississippi-like paleo-Red River. The model predicts that the modern Red River, which flows along the Ailaoshan-Red River Shear Zone (ASRRSZ) and eventually into the Song Hong-Yinggehai Basin (SHYGB), extended northward to involve the upper Yangtze, Mekong, and Salween Rivers in the past. To test model, this study reconstructs the Cenozoic exhumation history of the SHYGB's proximal sources using thermochronological datasets, and compares it with the sedimentation records. Results reveal that since the late Eocene, the Red River supplied ~84 % of the sediment in the SHYGB, with the remainder from Hainan Island to the east and central Vietnam to the west. The volumetric comparability contradicts the paleo-Red River model. We show that deep exhumation along the ASRRSZ dominated sediment ‘source-to-sink’ transport pattern of the Red River drainage basin.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110107"},"PeriodicalIF":3.1,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Quaternary seismic stratigraphy and evolution of the shelf-incised Krka river valley on the Eastern Adriatic coast, Croatia","authors":"Natalia Smrkulj ,&nbsp;Ozren Hasan ,&nbsp;Slobodan Miko ,&nbsp;Dimitris Christodoulou ,&nbsp;Maria Geraga ,&nbsp;Nikolina Ilijanić ,&nbsp;George Papatheodorou ,&nbsp;Valentina Hajek Tadesse ,&nbsp;Martina Šparica Miko ,&nbsp;Tatjana Durn","doi":"10.1016/j.geomorph.2025.110104","DOIUrl":"10.1016/j.geomorph.2025.110104","url":null,"abstract":"<div><div>The late Quaternary seafloor morphology, seismic stratigraphy, and depositional history of the submerged parts of the Krka River incised karst valley along the continental shelf area of the Eastern Adriatic coast were investigated using swath bathymetry, seismic profiles, and core sediments. Legacy and new seismic data reveal that these facies constitute up to 100 m of deltaic deposits. The shelf sequence experienced several episodes of erosion and subsequent drowning and consists of lowstand, transgression, and highstand deposits. During a sea-level lowstand, most of the shelf area was exposed, resulting in a valley incision on an alluvial plain. The alluvial environment is characterized by sediment bypass with the deposition of progradational clinoforms on the eastern slope of the Middle Adriatic Depression. Following the subsequent transgression, the shelf flooded, and the sediments filled the paleovalley, resulting in a transition from brackish to estuarine and marine deposits. As the transgression continued, the near-surface sediments were reworked and redistributed by shelf erosion, resulting in a thin transgressive sand sheet covering most of the shelf area. The uppermost deposits in the area of the Krka incised valley are regarded as highstand marine deposits. Modern erosional processes dominate the karst shelf area.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110104"},"PeriodicalIF":3.1,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grain-size controls on quartz OSL sensitivity in fluvial systems: insights from transport mechanisms in the upper Yellow River","authors":"Ya Liu ,&nbsp;Song-Xi Du ,&nbsp;Jia-Fu Zhang ,&nbsp;Xue Rui ,&nbsp;Yu-He Shen ,&nbsp;Jia-Jing Wang ,&nbsp;Qing-Hao Ma ,&nbsp;Zheng-Hao Gu","doi":"10.1016/j.geomorph.2025.110102","DOIUrl":"10.1016/j.geomorph.2025.110102","url":null,"abstract":"<div><div>Understanding sediment transport dynamics in large river systems remains challenging due to the complex grain-size-dependent processes. Optically Stimulated Luminescence (OSL) sensitivity of quartz grains offers potential as a sediment tracer, but its response to fluvial transport modes remains poorly constrained. Here we analyze 26 modern fluvial sediments along the Upper Yellow River (615 km from Zhaling Lake to Ruoergai Basin), comparing OSL characteristics across three transport regimes. The study reveals distinct patterns between fine and coarse fractions: Suspension-transported fine silt (4–11 μm) exhibits low OSL sensitivity (34.0 ± 12.0 to 551.3 ± 272.0 counts·mg⁻¹·Gy⁻¹, avg. 221.3 ± 125.0 counts·mg⁻¹·Gy⁻¹) and high residual doses (−2.2 ± 2.1 Gy to 19.0 ± 3.8 Gy, avg. 8.2 ± 4.9 Gy). This results from: (1) persistent turbidity shielding particles from sunlight exposure; (2) colloidal aggregation significantly reducing effective surface area for bleaching; and (3) Organic acid etching from riparian vegetation degrading luminescence centers. Bedload-transported medium-coarse grains (63–250 μm) show significantly higher sensitivity (63–90 μm: 137.9 ± 272.0 to 1939.0 ± 198.0 counts·mg⁻¹·Gy⁻¹, avg. 775.8 ± 138.7 counts·mg⁻¹·Gy⁻¹; 90–250 μm: 120.0 ± 52.0 to 1115.7 ± 20.0 counts·mg⁻¹·Gy⁻¹, avg. 513.2 ± 139.0 counts·mg⁻¹·Gy⁻¹) and near-zero residual doses (63–90 μm: -–0.5 ± 0.1 to 7.3 ± 0.9 Gy, avg. 0.7 ± 0.7 Gy; 90–250 μm: −0.7 ± 0.1 to 7.39 ± 0.9 Gy, avg. 0.5 ± 0.7 Gy), benefiting from repeated sunlight exposure during saltation/rolling and mechanical abrasion regenerating luminescence centers. Downstream trends show 24–27 % sensitivity increase within 300 km (e.g., 63–90 μm: 422.7 ± 13.2 to 1314.3 ± 26.1 counts·mg⁻¹·Gy⁻¹), demonstrating progressive signal enhancement. Notable deviations occur at: (1) Dari County (334 km), where road construction introduces low-sensitivity debris (DML: 527.0 ± 111.0 counts·mg⁻¹·Gy⁻¹), and (2) Maqu (744 km), where aeolian inputs elevate sensitivity (817.0 ± 51.0 counts·mg⁻¹·Gy⁻¹). The Ruoergai Basin shows 19–24 % sensitivity reduction due to tectonic subsidence limiting sediment reworking. These findings establish OSL sensitivity as an effective discriminator of transport mechanisms, with bedload grains (&gt;63 μm) optimal for depositional dating and fine grains preserving source signals. The study provides a quantitative framework for sediment routing analysis in large fluvial systems.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110102"},"PeriodicalIF":3.1,"publicationDate":"2025-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristics and formation mechanisms of sand-flow talus slopes in cold–arid Valleys, Southeastern Tibet","authors":"Yang Xue ,&nbsp;Ningsheng Chen ,&nbsp;Tao Wen ,&nbsp;Yankun Wang ,&nbsp;Bocheng Zhang ,&nbsp;Yunpeng Yang ,&nbsp;Zhenye Yang","doi":"10.1016/j.geomorph.2025.110099","DOIUrl":"10.1016/j.geomorph.2025.110099","url":null,"abstract":"<div><div>Talus slopes are prevalent throughout alpine mountain regions. In southeastern Tibet, along the Bomi–Ranwu section of the G318 National Highway, sand-flow talus (SFT) deposits pose a significant threat to the road. This research explores their development, environmental influences, and formation processes through field surveys, remote sensing, laboratory tests, and spatiotemporal data analysis. The findings show that factors such as precipitation, elevation, the aridity index, and stream order play crucial roles in shaping these slopes. Approximately 72 % of the slopes are found close to first-order streams. Detrital particles primarily originate from the physical weathering of granites, which are primarily made up of mineral particles such as quartz and feldspar, with minimal clay content. The weathered material comes from medium- to coarse-grained granite bedrock and is shaped by dense structural planes in cold-arid valley conditions. Daily temperature fluctuations induce thermal fatigue and freeze–thaw cycles, which primarily facilitate the physical weathering of rock. The development of SFT slopes involves rock-mass collapse, gravity-driven downward movement, and particle transport over long distances via flow zones. Hydraulic erosion processes, such as interrill and rill erosion, primarily drive the movement and accumulation of grain materials. This study offers new insights into the formation mechanisms of SFT slopes in alpine mountain environments and establishes a scientific basis for hazard prevention.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110099"},"PeriodicalIF":3.1,"publicationDate":"2025-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145693628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Storm-driven coastal boulder transport over two winter storm seasons on Inishmaan, Ireland","authors":"Hannah R. Spero ,&nbsp;Melissa A. Berke ,&nbsp;Jacob Berryhill ,&nbsp;Mary C. Bourke ,&nbsp;Niamh D. Cullen ,&nbsp;Frederic Dias ,&nbsp;Isabel Garcia ,&nbsp;James G. Herterich ,&nbsp;Michael J. Starek ,&nbsp;Mariana Silva ,&nbsp;Joannes J. Westerink ,&nbsp;Andrew B. Kennedy","doi":"10.1016/j.geomorph.2025.110105","DOIUrl":"10.1016/j.geomorph.2025.110105","url":null,"abstract":"<div><div>This work presents the results of a two-year coastal boulder study in Inishmaan, Ireland, where individual boulder motion was tracked using accelerometers, aerial photography, and on-ground surveys. The study monitored boulder movement across four sites during Winter 2022/23 (<em>n</em> = 22), expanded in Winter 2023/24 (<em>n</em> = 36), and prepositioned some boulders to be isolated on the supratidal shore or cliff platform to increase their exposure.</div><div>Although coastal boulder deposits in Western Ireland have been studied extensively over recent decades and have been hypothesized to be active only in extreme winter storms, we observed multiple storm inundation events transporting boulders each year. Transport was likely for boulders on open platforms than those constrained by other boulders or topographic barriers, and smaller, lower-elevation boulders were more likely to be transported than larger, higher-elevation boulders. Transport directions were complex and net seaward boulder motion was not observed.</div><div>Our results show that boulders were predominantly transported during storm events coinciding with high tide, highlighting the significant role of the tidal stage in mesotidal locations. These findings demonstrate that some coastal boulder deposits can be active annually, with isolated boulders particularly vulnerable to storm transport. With boulders moving more regularly than previously thought, there are implications for coastal planning, safety, and management.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110105"},"PeriodicalIF":3.1,"publicationDate":"2025-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linkage between sediment supply and transport in a large alpine catchment: Oi River basin, Japan","authors":"Juan Antonio Ballesteros Cánovas ,&nbsp;Fumitoshi Imaizumi ,&nbsp;Daniel Trappmann ,&nbsp;Markus Stoffel","doi":"10.1016/j.geomorph.2025.110100","DOIUrl":"10.1016/j.geomorph.2025.110100","url":null,"abstract":"<div><div>This study examines the frequency and magnitude of extreme sediment-laden flows in the Oi River catchment, focusing on their relationship with climate, sediment supply, and transport processes. To this end, we reconstructed historical sediment-laden floods in twelve subcatchments using paleostage indicators from trees and different empirical equations. We also included in-situ hourly climate data and long-term sediment records along the main river. Our results provide insights into the seasonal occurrence of sediment-laden floods in the region. More than 72 % of the events occurred during the pre-typhoon period, but typhoon-related flows exhibited higher rainfall intensities (9.6 ± 3.3 mm/h) and peak discharges (233.4 ± 145.5 m³/s) compared to non-typhoon events (6.8 ± 3.2 mm/h and 171.6 ± 90.9 m³/s, respectively). This implies that typhoon-related flows are more intense, whereas the more frequent non-typhoon events can significantly contribute to time-averaged sediment volumes. Yet, our findings further indicate that sediment transfer differs between tributaries and the main Oi River: while tributaries experienced episodic sediment transfer events linked to debris flows and landslides, the main river showed more sustained sediment transfer patterns driven by fluvial processes. These results underscore the influence of temporary sediment storage in the Oi River basin, which acts as a buffer to downstream sediment transfer during moderate events. This study also highlights the importance of integrating event dating techniques with hydraulic and geomorphic approaches in order to improve our understanding of the mechanisms of sediment-laden flows. Such insights are crucial for a better prediction and management of sediment hazards in similar mountain environments.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110100"},"PeriodicalIF":3.1,"publicationDate":"2025-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stream channel morphology and water flow in ice-free areas of Byers Peninsula, South Shetland Islands, Antarctica","authors":"José Antonio Ortega-Becerril ,&nbsp;Thomas Schmid ,&nbsp;Juan Pablo Corella ,&nbsp;Luis Carcavilla ,&nbsp;Mikel Calle ,&nbsp;Jerónimo López-Martínez","doi":"10.1016/j.geomorph.2025.110101","DOIUrl":"10.1016/j.geomorph.2025.110101","url":null,"abstract":"<div><div>Fluvial stream channels in Antarctic ice-free areas provide valuable insights into deglaciation/neoglaciation, and the pace of morphogenetic processes shaping the landscape. The northern Antarctic Peninsula, particularly the South Shetland Islands, offers unique conditions for such studies due to extensive ice-free zones, glacial history, and rapidly changing environments. This research focuses on Byers Peninsula (BP), the largest ice-free area of the archipelago, characterized by a well-developed drainage system previously studied and mapped. This paper expands knowledge of channel development, water flow, and related morphologies, relevant for understanding other ice-free Antarctic regions. Morphometric analyses were conducted on 26 streams, alongside evaluation of channel equilibrium in three selected watersheds. Water flow was monitored for two years in two streams using data loggers, with complementary field data from a third. Seven morphotypes were distinguished within a theoretical watershed, including diffuse drainage, platform lakes, braided systems, canyons, cutting raised platforms, open braided channels, entrenched channels on raised beaches, lagoons and/or small fans. Results highlight significant variability in channel size and hydraulic properties across sub-basins. Southern BP streams reveal higher fluvial energy, while Western streams, draining larger basins with higher stream orders, display more advanced fluvial development and concentrate the main systems of the region. Basin orientation, glacier proximity, and topography emerged as key factors shaping channel dimensions, while glacial lake outburst floods strongly influenced morphology and sediment dynamics. The presence of paired morphometrically similar channels on North and South coasts supports a stepwise west–east retreat of Rotch Dome Glacier, marked by stagnation phases producing mature channels and rapid retreats yielding less developed systems.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110101"},"PeriodicalIF":3.1,"publicationDate":"2025-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tectonic imprints and channel dynamics in the Upper Ken Basin, Peninsular India: Insights from neotectonics and inversion structures","authors":"Kundan Parmar ,&nbsp;Satheesh Chothodi","doi":"10.1016/j.geomorph.2025.110091","DOIUrl":"10.1016/j.geomorph.2025.110091","url":null,"abstract":"<div><div>The Upper Ken Basin of central India, located at the junction of the Bundelkhand Craton and the Vindhyan Basin, exhibits strong tectonic and lithological control over its fluvial systems. We analyzed 25 sub-catchments using a 30 m DEM and GSI Bouguer gravity maps, applying DEM-based morphometric indices (hypsometric integral, stream-length gradient, and Transverse Topographic Symmetry). Hypsometric integrals range from ~0.30 to 0.70: several upland catchments (S-1) have HI &gt; 0.60 (convex profiles), whereas deeply incised catchments (S-6–S-8) have HI &lt; 0.30 (concave), indicating localized uplift and enhanced erosion. Stream-length gradient (SL) analysis identifies pronounced knickpoints; notably, the Ken River shows an SL index ≈4.4 × 10⁴ (≈44,000) at ~141 km from its source, coincident with a topographic cusp and a positive gravity anomaly. The Sonar and Bearma rivers also exhibit SL peaks that align with resistant sandstone units and Bouguer highs. ANOVA results indicate that catchment elevation (η² ≈ 0.023–0.083) explains substantially more SL-index variance than lithology (η² ≈ 0.008–0.045; <em>p</em> &lt; 0.001). The Transverse Topographic Symmetry Index reveals a coherent southeastward channel migration in most western and southwestern catchments (mean azimuth ≈130°), consistent with tilting toward the Vindhyan syncline; a few eastern catchments display southwestward trends associated with local lithologic controls. These geomorphic asymmetries spatially coincide with NE–SW-trending lineaments and N–S grabens (e.g., Sonar–Jabera faults). Together, these findings underscore the role of hidden intraplate deformation in shaping drainage networks and imply that such tectonic signals should be considered in regional water-resource management and seismic-hazard planning.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"494 ","pages":"Article 110091"},"PeriodicalIF":3.1,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145624663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}