Guojian He

ORCID: 0000-0003-2504-2904
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About
Contact & Profiles
Research Areas
  • Hydrology and Sediment Transport Processes
  • Soil erosion and sediment transport
  • Hydrology and Watershed Management Studies
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Soil and Water Nutrient Dynamics
  • Aeolian processes and effects
  • Fish Ecology and Management Studies
  • Marine and coastal ecosystems
  • Flood Risk Assessment and Management
  • Hydraulic flow and structures
  • Geological formations and processes
  • Marine and environmental studies
  • Fluid Dynamics and Turbulent Flows
  • Geology and Paleoclimatology Research
  • Coastal wetland ecosystem dynamics
  • Hydrocarbon exploration and reservoir analysis
  • Cryospheric studies and observations
  • Heavy metals in environment
  • Particle Dynamics in Fluid Flows
  • Constructed Wetlands for Wastewater Treatment
  • Geochemistry and Elemental Analysis
  • Ecosystem dynamics and resilience
  • Freshwater macroinvertebrate diversity and ecology
  • Land Use and Ecosystem Services
  • Microbial Community Ecology and Physiology

Tsinghua University
2016-2025

Hebei University of Economics and Business
2022

Weatherford College
2022

Kleijnen Systematic Reviews (United Kingdom)
2022

State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering
2008-2019

Yellow River Institute of Hydraulic Research
2013

Beijing Water Science and Technology Institute
2010

Abstract Microorganisms are ubiquitous in aqueous environments and crucial for biogeochemical processes, but their community structures functions remain poorly understood. In this paper, a rotating reactor was designed to study the effects of substrata flow conditions on sediment bacterial communities using 16S rRNA gene sequencing, assaying three groups size-fractionated sediments different levels applied shear stress. Proteobacteria , Firmicutes Bacteroidetes were dominant phyla microbial...

10.1038/s41598-017-01446-4 article EN cc-by Scientific Reports 2017-04-25

In this study, macro-rough flows over beds with different permeability values are simulated using the large-eddy simulation, and results analysed by applying double-averaging (DA) methodology. Spheres of sizes arrangements were used to form beds, which deemed be permeable granular beds. The influence bed on turbulence dynamics structure is investigated. It was observed that scales spanwise vortical structures more larger than those less This attributed large-scale spanwise-alternate strips...

10.1017/jfm.2018.314 article EN Journal of Fluid Mechanics 2018-05-25

Abstract In flowing water the incipient motion of sediment can be affected by presence microbial biofilm growth. This article documents a series flume experiments using non‐uniform sediments, in which entrainment was investigated for cases where immersed deionized water, so that no developed, and bio‐sediment cultivated placing mixture natural nutrient solution. Differences velocity at were measured over an eight week period, as grew. It found phenomena quite distinct between two kinds...

10.1111/sed.12065 article EN Sedimentology 2013-07-10

Abstract In this study, we present a three-dimensional numerical model for the interaction of flow with submerged flexible vegetation, based on large-eddy simulation and immersed boundary method. The innovatively realises between highly vegetation clustered leaves. Besides being motion full degrees freedom, study improves consideration in all directions, addition energy momentum transfer spanwise direction. Furthermore, perform flume experiment results which are used to validate effects...

10.1017/jfm.2022.598 article EN cc-by Journal of Fluid Mechanics 2022-08-25

Abstract Most natural sediment is invariably covered by biofilms in reservoirs and lakes, which have significant influence on bed form dynamics transport, also play a crucial role river evolution, pollutant habitat changes. However, most models for transport are based experiments using clean sediments without biological materials. In this study, three‐dimensional mathematical model of hydrodynamics presented with comprehensive consideration the biofilm effects. The changes resistance mainly...

10.1002/2017wr020628 article EN Water Resources Research 2017-08-03

Submerged flexible vegetation occupies the core of aquatic ecosystem research. Hydrodynamics submerged and its interaction with flow in an open channel are great significance studying mass momentum transports flow. In this study, a numerical model for highly based on large eddy simulation immersed boundary method was used to simulate flow–vegetation interaction. It is recognised that alternate vortices opposite sense rotations appear at interface. These prompt canopy have wave-like coherent...

10.1017/jfm.2022.899 article EN cc-by Journal of Fluid Mechanics 2022-11-11

Submerged vegetation plays a subtle role in exchanging the fluid mass and energy vegetated flow zone, where swaying motions of flexible plants are important source turbulent kinetic production. Flume experiments were conducted to study modes, characteristics factors individual submerged plants. A modified plant model new form, representing highly with clustered leaves, was employed. ‘rigid-like’ synchronous mode ‘whip-like’ asynchronous flapping found appear alternately for The interaction...

10.1017/jfm.2023.587 article EN cc-by Journal of Fluid Mechanics 2023-09-15
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