Classification and Recognition of Fluvial Geomorphic Units Based on Process and Form Relationship by YU Zicheng, DENG Rui, ZHANG Jing, ZHAO Jinyong, DING Yang, LI Xuan

“…Clarifying the types of fluvial geomorphic units and their spatial distribution can better recognize and understand rivers.In the face of problems such as the imperfection and difficult implementation of the existing classification and recognition methods of geomorphic units in China,the mature classification systems of Fryirs and Brierley geomorphic units in other countries were summarized,and the process and form relationship of different geomorphic unit types was sorted out.The Daning River,a first-level tributary of the Yangtze River,was taken as a practical case.The classification and recognition process of fluvial geomorphic units based on the process and form relationship was formed,and the spatial distribution of geomorphic units was defined by combining with the field survey data of air,sky,and ground.The classification system of Fryirs and Brierley geomorphic units was divided into four categories:alluvial and erosional bedrock and boulder units,mid-channel sedimentary units,riparian sedimentary units,and alluvial and erosional fine-grained units,including 42 types of terrace falls,deep pools,and point beaches.The types of geomorphic units included in the confluence section of the Lianghekou area of the Daning River and Houxi River were tandem plunge,rapid beach,slippery water,deep pool,shallow beach,slow flow area,side beach,and heart beach,accounting for 16.43%,21.51%,7.21%,20.45%,16.90%,13.59%,and 3.91% of the studied river section,respectively.Quantitative analysis of the spatial distribution of geomorphic units can provide theoretical support for the restoration of damaged habitats and habitat assessment in the river section.…”
Get full text

Karyotype uniformity in populations of the endemic Hemiancistrus fuliginosus (Loricariidae: Hypostomini) collected in the upper and middle Uruguai River by Jocicléia Thums Konerat, Vanessa Bueno, Ana Luiza de Brito Portela-Castro, Isabel Cristina Martins-Santos, Vladimir Pavan Margarido

“…In this study, cytogenetics analyzes in four populations of H. fuliginosus from tributaries of the Uruguai Riverrevealed 2n = 56 chromosomes (30m + 18sm + 6st + 2a) for all populations. …”
Get full text

Research on Water Quality Improvement Method Based on Slowly-Stored and Quickly-Released System in Xi'an Moat by SUN Chao, HAN Weigang, NONG Xiaoying, WANG Hui, WANG Wenyu, GAO Zehai

“…The slowly-stored and quickly-released system was studied to explore the method of optimizing the hydrodynamic force of rivers in arid regions and reveal its effect on water quality.The south-west tributary of Xi'an moat was defined as the study area.A hydrodynamic force-water quality coupling model of the moat was built based on the collected data of current water quality and hydrodynamic force by using MIKE21.In the coupling model,the impounding gate was designed based on the dam body of the moat to simulate the scouring and silting capacity of the lower reaches caused by rapid discharge from the upper reaches of the channel.The influence law of rapid discharge at different water levels and water quality conditions on hydrodynamics and water quality of the moat was studied.The numerical simulation results from MIKE21 show that water level has a significant influence on the hydrodynamic force,and water quality has a significant influence on the pollutant concentration.The simulation results of the hydrodynamic force-water quality coupling model of the moat show that the working condition with a 1-meter water level and class Ⅲ inlet water quality can greatly improve the water quality and hydrodynamic force of Xi'an moat.By using the water reaching the standard of the class Ⅲ inlet water quality as the supply source,the water quality of Xi'an moat can be effectively improved by enhancing the hydrodynamic force of the moat.…”
Get full text

Floods of 18 and 19 November 2016 in Batouri (East Cameroon): Interpretation of the Hydro-Meteorological Parameters and Historical Context of the Post-Event Survey Episode by Paulin Sainclair Kouassy Kalédjé, Jules-Rémy Ndam Ngoupayou, Alain Fouépé Takounjou, Mireille Zebsa, Felaniaina Rakotondrabe, Joseph Mvondo Ondoa

“…The floods were particularly damaging in the city of Batouri, where a subdivision was submerged by the Boumbé (tributary of the Sangha) with water heights in the houses reaching 1.75 m, despite the presence of a dam allowing clipping floods upstream of the basin. …”
Get full text

Aranzadi (Pamplona) (13 de diciembre de 2019) by Aitor Gallardón

“…Aranzadi is part of Arga’s river basin (Ebro’s tributary). It is located next to it, being considered a meander or an abandoned course. …”
Get full text

Icings in the Selenga River basin by Vladimir Chernykh, Andrey Shikhov, Alexander Ayurzhanaev, Bator Sodnomov, Bair Tsydypov, Margarita Zharnikova, Bair Gurzhapov, Endon Garmaev, Avirmed Dashtseren

“…In this study, we present a GIS dataset and map of icings formed in the transboundary Selenga River basin (largest tributary of the Lake Baikal). The GIS dataset of icings is compiled using Landsat and Sentinel-2 satellite images, as well as materials from the field expedition studies. …”
Get full text

DNA Barcoding Reveals Widespread Co-Occurrence of Other Chub Species in the Range of the Endemic Catalan Chub, <i>Squalius laietanus</i> by Núria Pérez-Bielsa, Sandra Heras, Alba Abras, Jose-Luis García-Marín

“…<i>Squalius laietanus</i> haplotypes were found in 68% of the fish caught. In a tributary of the Ebro River, all specimens (6%) were identified as the Tagus chub, <i>S. pyrenaicus</i>, another endemic Iberian chub species. …”
Get full text

Evaluation of spatio-temporal water quality status of Jeera river, Odisha, India by Aiswarya Pati, Showkat Ahmad Mir, Archana Padhiary, Iswar Baitharu, Binata Nayak

“…The river was formerly a flourishing tributary of the massive Mahanadi River that possessed excellent navigability, an array of aquatic ecosystems, and a well-established basin with an expanding agricultural sector. …”
Get full text

Characteristics of Runoff Variation of Heishui River Basin in the Upper Reach of Minjiang River in Changing Environment by WANG Ning, WANG Wensheng, YU Siyi

“…This paper systematically analyzed the variation characteristics of runoff in the Heishui River Basin,the first tributary on the right bank upstream of Minjiang River,in a changing environment.The variation characteristics of runoff series were studied by using an improved heuristic segmentation algorithm,Mann-Kendall trend test,R/S analysis and wavelet analysis with the runoff data of Shaba hydrological station from 1960 to 2015.The results show the followings:① The abrupt change of annual runoff occurred in 1995.② The annual runoff showed a significant decrease trend with a decreasing rate of 0.32 m³/(s·a) in the past 56 years and may keep the decrease trend in the future.During 1960—1995,the annual runoff showed an insignificant decrease trend with a decreasing rate of 0.12 m³/(s·a),and the period of 1996—2015 witnessed an insignificant increase trend with an increasing rate of 0.80 m³/(s·a).③ Under the influence of environmental changes,the average annual runoff before the change point was larger than that after the point,whereas the inter-annual variation was smaller before the abrupt change.The intra-annual distribution form showed a double-peak curve before 1995 and a single-peak curve after 1995.The intra-annual variation range of runoff was significantly different before and after the change point,which could reduce flood control pressure in the basin but was not conducive to the utilization of water resources in non-flood seasons.④Annual runoff had multi-time-scale variation characteristics.During 1960—2015,the annual runoff had noticeable periods of 6 years,16 years and 28 years.Periods of 7 years and 16 years were found for 1960—1995 and 2 years and 5 years for 1996—2015.…”
Get full text

Aranzadi (Pamplona) (13 de diciembre de 2019) by Aitor Gallardón

“…Aranzadi is part of Arga’s river basin (Ebro’s tributary). It is located next to it, being considered a meander or an abandoned course. …”
Get full text

Exploitation of Documented Historical Floods for Achieving Better Flood Defense by Slobodan Kolaković, Julius Fabian, Sándor Kovács, Ljubomir Budinski, Matija Stipić

“…The investigated cases of flood superposition highlighted the impact of tributary Maros on flood mitigation along the Tisza River.…”
Get full text

Allometric Growth of the Freshwater Crab Potamon algeriense (Bott, 1967) (Decapoda, Brachyura, Potamidae) in Oued Zegzel, a Mountain Stream, in the Northeast of Morocco by Soufiane Fadlaoui, Mohammed Mahjoub, Ouahid El Asri, Mohammed Melhaoui

“…A morphometric study has been carried out for the first time on the population of the freshwater crab Potamon algeriense inhabiting Oued Zegzel, a tributary of the Lower Moulouya River, in the northeast of Morocco. …”
Get full text

The Distribution between the Dissolved and the Particulate Forms of 49 Metals across the Tigris River, Baghdad, Iraq by Samera Hussein Hamad, James Jay Schauer, Martin Merrill Shafer, Esam Abed Al-Raheem, Hyder Satar

“…The distribution of dissolved and particulate forms of 49 elements was investigated along transect of the Tigris River (one of the major rivers of the world) within Baghdad city and in its major tributary (Diyala River) from 11 to 28 July 2011. SF-ICP-MS was used to measure total and filterable elements at 17 locations along the Tigris River transect, two samples from the Diyala River, and in one sample from the confluence of the two rivers. …”
Get full text

The upper Neretva River discontinuum: gradients of taxonomic and functional diversity of benthic invertebrates in a wild Balkan river by Edurne Estévez, Davina Dietrich, Simone Sahler, Fabian Vassanelli, Sara Widera, Jan Martini, Wolfgang Wanek, Gabriel Singer

“…The taxonomic composition differed prominently between a tributary located upstream and the mainstem. However, we also found notable species turnover between the upper (headwater and midsection) reaches and the downstream reaches of the mainstem. …”
Get full text

The population structure and habitat use of resident of Mandarin Duck (Aix galericulata) in Wu River (Southwest China) by Canshi Hu

“…This study provided the first report on the structure of the resident population and the habitat used during the post-breeding period at a tributary of the Wu River in Guizhou Province, Southwest China, which was one of the recently identified breeding sites within the traditional wintering range. …”
Get full text

Cycles of History: China, North Korea and the End of the Korean War by Sheila Miyoshi Jager

“…That war had been fought over influence in Korea and it marked the end of Korea's tributary relationship with China. It was the beginning of China's decline and Japan's ascendancy in East Asian affairs. …”
Get full text

Propagating speedups during quiescence escalate to the 2020–2021 surge of Sít’ Kusá, southeast Alaska by Jukes Liu, Ellyn M. Enderlin, Timothy C. Bartholomaus, Yoram Terleth, Thomas Dylan Mikesell, Flavien Beaud

“…Throughout quiescence, we observe order-of-magnitude speedups that propagate down-glacier seasonally from the glacier's upper northern tributary, above a steep icefall, into the reservoir zone for the surging portion of the glacier. …”
Get full text

Dynamic structural characteristics and vibration susceptibility of Tongren loess under the influence of water content and confining pressure by Changbao Guo, Sanshao Ren, Yinlong Tan, Yaqi Shen

“…Abstract Loess is extensively developed on both sides of the Longwu River, a tributary of the Yellow River, Tongren County, Qinghai Province. …”
Get full text

Applying baseflow approach to the environmental flow needs of the Similkameen River Watershed in British Columbia, Canada by Hongli Chen, Qiang Li, Qiaoqiao Wang, Xuanjiao Chai, Yaping Wang

“…Using calibrated Eckhardt method, baseflow for 23 tributaries were derived allowing for quantification of EFN for spring, summer and fall-winter across tributaries by the EFNBF method. …”
Get full text

THE SALINITY ORIGIN OF THE SURFACE WATER IN THE WATERSHED DAM ZARDEZAS, EASTERN ALGERIA by Sami KEMOUKH, Ali ATHAMENA, Fouad DJAIZ, Halima BELALITE, Malika ATHAMENA

“…To address this issue, we received 45 samples during the 09 campaigns conducted during the period of low and high water of the year 2015-2016, distributed over five points, namely the tributary Oued Khemakhem, Oued Bouadjeb, Oued Safsaf, reservoir of the Zerdazas dam and the downstream of the Zerdazas dam. …”
Get full text