Urbanization and the expansion of impervious surfaces have increased stormwater runoff volumes, altered timing, degraded water quality aquatic ecosystems. Runoff from urban areas carries pollutants such as nitrogen, phosphorus, sediments, heavy metals, which can adversely impact physical characteristics receiving waterbodies. Stormwater management programs aim to mitigate these effects using Best Management Practices (BMPs) retain treat on-site. However, in densely developed areas, space...

This study examines the impact of human-induced changes to lower Brazos-San Bernard delta on sedimentation rates and sediment sources filling estuarine lakes within its western inland area. The began forming in 1929 when Brazos River mouth was relocated 10 km west original position, placing it 5 from San River's mouth. Over time, wave-dominated Delta expanded westward, closing extending beyond it. In 1949, Gulf Coast Intercoastal Waterway (GCIWW) canal completed, bisecting Cedar...

Floods are the most common cause of bridge failures, thus studies superstructures' hydrodynamic properties and how they interact with floods essential for designing safe resilient bridges. Current research on interactions between flow bridges is limited to study around generalized cylinders; therefore, this aims investigate field submerged typical geometry. The structure scale models was examined in a laboratory setting, using particle image velocimetry (PIV). PIV data utilized estimate mean...

Abstract Formation, propagation, and recession of ice cover introduce a dynamic boundary layer to the top rivers during northern winters. Ice affects water velocity magnitude distribution, level consequently conveyance capacity river. In this research, total resistance, i.e., “composite resistance,” is studied for 4 month period including stable cover, breakup, open stages in Lower Nelson River (LNR), Manitoba, Canada. Flow characteristics such as depth thickness condition were measured...

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The size of the largest horizontal coherent structures (HCSs) turbulence in open-channel flows is investigated experimentally on basis three series flow velocity measurements. These are further used to explore dynamics and morphological consequences HCSs. measurements were carried out a 21 m long 1 wide channel, with bed formed by sand average grain 2 mm. surface was flat. turbulent subcritical under investigation uniform, depth 4 cm. slope 0.0015 such that, for present depth, shear stress...

The existence region plan of alternate bars, multiple meandering and braiding, introduced by da Silva in 1991 presented its most recent form Yalin the 2001 IAHR monograph Fluvial Processes, is updated revised. For this purpose, extended adding available laboratory field data from literature, as well earlier that only recently became to authors. Data two series runs conducted authors are also included. These were fill a gap existing data, pertinent definition bars. This work led revision...

River ice complicates river hydraulics and morphodynamics by adding a new boundary layer to the top of flow. This affects velocity distribution throughout depth due increased flow resistance, varies local shear stress on bed (lower boundary) upper (under surface ice). Variation plays an important role in incipient motion lower materials: sediment transport are directly affected stress, as cover thickness, condition, progression. paper provides estimates during stable stage breakup using...

Erosion is a natural process, but it can be accelerated by anthropogenic activities. Two of the predominant types human-induced erosion are related to agricultural and construction Of two, construction-induced more severe because simultaneous removal land cover, disturbance soil, eventual compaction soil heavy machinery. Eroded materials released from bridge sites alter sediment regime geomorphological conditions receiving streams may have short- long-term impacts on aquatic habitats....

This paper explores use of acoustic Doppler current profiler backscatter amplitude as a surrogate for total suspended solids concentration. Total concentration and data were collected at the Lower Nelson River Red in Manitoba, Canada, during both ice-covered open water periods such that could be calibrated to predict TSS concentrations. Several novel calibration schemes evaluated, including multiple linear regression models involved flow parameters determined from addition intensity. The...

This article focuses on developing models that estimate suspended sediment concentrations (SSCs) for the Lower Brazos River, Texas, U.S. Historical samples of SSCs from gauge stations and satellite imagery Landsat Missions Sentinel Mission 2 were utilized to develop River. The used in this study accomplish goal include support vector machines (SVMs), artificial neural networks (ANNs), extreme learning (ELMs), exponential relationships. In addition, flow measurements rating curves River as a...

Urbanization and the expansion of impervious surfaces have increased stormwater runoff volumes, altered timing, degraded water quality aquatic ecosystems. Runoff from urban areas carries pollutants such as nitrogen, phosphorus, sediments, heavy metals, which can adversely impact physical characteristics receiving waterbodies. Stormwater management programs aim to mitigate these effects using Best Management Practices (BMPs) retain treat on-site. However, in densely developed areas, space...

Abstract Previously utilized techniques for analysis of flow velocity in ice‐controlled zone are confirmed to be valid. Potential sources error regarding the estimation energy grade line slope corrected considering comments by discussant. A modified version equation composite roughness calculation originally introduced paper is presented. The revised new method then tested against other available methods and its accuracy evaluated. Other assumptions analyses presented also validated.

Abstract. The field of cohesive soil erosion is still not fully understood, in large part due to the many parameters that affect erodibility. This study focused on two channels, 2-Mile and 8-Mile channels northern Manitoba, Canada, were built connect Lake Winnipeg with Playgreen Kiskikittogisu Lake, respectively. banks consist clay rich soils alluvial deposits layered clay, silts sands. at sites further complicated because flow-induced combined effects significant wave action fetch length...