A5100425678- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Landslides and related hazards
- Hydrology and Watershed Management Studies
- Hydraulic flow and structures
- Bacteriophages and microbial interactions
- Particle Dynamics in Fluid Flows
- Flood Risk Assessment and Management
- Water resources management and optimization
- Geology and Paleoclimatology Research
- Water Resources and Management
- Sexual Differentiation and Disorders
- Fluid Dynamics and Turbulent Flows
- Water-Energy-Food Nexus Studies
- Metabolism and Genetic Disorders
- Genomics and Phylogenetic Studies
- CRISPR and Genetic Engineering
- Granular flow and fluidized beds
- Geological formations and processes
- Bacterial Genetics and Biotechnology
Watershed
2024
Jiangxi Normal University
2024
Tsinghua University
2009-2022
University of Illinois Urbana-Champaign
1994-2022
Huazhong University of Science and Technology
2022
Qinghai University
2018-2020
Hohai University
2018
North China University of Water Resources and Electric Power
2018
Desert Research Institute
2018
Central South University
2009
Conjugal transfer of the nopaline-type Agrobacterium Ti plasmid pTiC58 is regulated by a transcriptional activator, TraR, and diffusible signal molecule, conjugation factor (CF). CF member family substituted homoserine lactones (HSLs) that act as coinducers for regulating gene expression in diverse Gram-negative bacteria mechanism called autoinduction. In Vibrio fischeri HSL production conferred luxI gene. Homologues this are responsible other bacteria. A we call traI, conferring material...
During its 6,300-km course from the Tibetan Plateau to ocean, Yangtze River is joined by two large lakes: Dongting Lake and Poyang Lake. We explain why these lakes exist. Deglaciation forced ocean adjacent mouth rise ∼120 m. This a wave of rising water surface elevation concomitant bed aggradation upstream. While attenuated upstream, low slope Middle-Lower (∼2 × 10-5 near Wuhan) made it susceptible sea level rise. The main stem, sourced at 5,054 m above level, had substantial sediment load...
Factors such as flow and sediment characteristics affecting the spur dike’s local depth of erosion have yielded considerable research results, but there is little discussion geometry scour holes. This study focuses on spatial holes in straight-wall dikes. The shows that dike arrangement clearly changes plane hole. maximum has a power function relationship with area hole hole-volume. Moreover, ratio product to hole-volume fixed constant. average slope upstream along axis direction slightly...
Abstract Mountain rivers subject to earthquakes and intense precipitation have highly variable sediment supply rates. Here we consider the morphodynamics of 1‐D mixed bedrock‐alluvial with temporally varying We use a periodic sedimentograph, characterized by short periods high feed rate longer low rate. study problem corrected Macroroughness Saltation‐Abrasion‐Alluviation model. In this model, incision is driven bedload colliding bedrock, but can be turned off either zero transport or...
By changing the alignment angle of spur dike, this study focused on evolution scour hole morphology in three alignments under clear-water conditions, including 3-D structure hole, 2-D profile morphological process and characteristics local bed shear stress. The results show that plane area volume both are power functions over time, which is similar to depth. Local includes stages: initial stage, development stage balance stage. stress presents successively: τb > τc, = τc < τc. Based...
Understanding historical changes of water and sand characteristics in the Ganjiang River basin their influencing factors is critical task for ecological construction, resources management, human production life basin.We here used Mann-Kendall sliding t-tests to analyze annual runoff transport based on data from hydrological stations 1958 2019.Our results show that: (1) interannual variation 2019 significant, alternating between flat, dry, abundant conditions, with an abrupt change occurring...
Abstract Purely alluvial rivers cannot sustain knickpoints along their long profiles, as they would be obliterated by diffusional morphodynamics. Bedrock streams with a partial cover, however, form and slope breaks over periods of time. Here we consider the case an initial profile bedrock-alluvial stream sharp break, or knickpoint, from high to low midway. We show that if flow is sufficiently Froude-supercritical in upstream reach Froude-subcritical downstream reach, three-tiered structure...
Incising rivers may be confined by low-slope, erodible hillslopes or steep, resistant sidewalls. In the latter case, system forms a canyon. We present morphodynamic model that includes essential elements of canyon incising into plateau, including 1) abrasion-driven channel incision, 2) migration canyon-head knickpoint, 3) sediment feed from an alluvial upstream and 4) production sidewall collapse. calculate incision in terms collision clasts with bed. knickpoint using moving-boundary...
Closed basins are commonly found in desert environments. They delineate an excellent configuration with which to study source-to-sink processes. Here we use the Rainbow Canyon-Panamint Valley canyon-fan system, Death Valley, USA as example for development of a general numerical model. The upstream region our reach is incising into bedrock, retreating knickpoint. downstream alluviated, and ends closed boundary. In between normal fault. relative uplift, driving incision (e.g. Argus Range),...
&lt;p&gt;River networks are ubiquitous in nature. The example of the Amazon River, South America, is shown below.&lt;/p&gt;&lt;p&gt;Typically, channel branches farther upstream tend to be steeper than downstream. Here we explain this tendency via a simple model lowland sand-bed stream networks. Any given downstream branch bifurcates into two upstream, here each assumed have discharges equal half branch. . Each satisfies (at bankfull flow) relation for flow resistance,...