Existing regulatory frameworks aiming to improve the quality of rivers place hydromorphology as a key factor in the assessment of hydrology, morphology and river continuity. The majority of available methods for hydromorphological characterisation rely on the identification of homogeneous areas (i.e., features) of flow, vegetation and substrate. For that purpose, aerial imagery is used to ident...

In order to explore the water level variations of Caizi Lake under river-lake isolation, monthly Chefuling station in from 1989 2018 and daily level, rainfall flow local hydrological stations were analyzed by using Mann-Kendall trend test wavelet analysis. Results showed that difference average between flood dry seasons was 3.34 m, with a multi-year 10.42 m above sea level. The first second mai...

The salinity difference between seawater and river water is a renewable source of enormous entropic energy, but extracting it efficiently as a form of useful energy remains a challenge. Here we demonstrate a device called "mixing entropy battery", which can extract and store it as useful electrochemical energy. The battery, containing a Na(2-x)Mn(5)O(10) nanorod electrode, was shown to extract ...

A stochastic state space model for the estimation f fiver temperature is presented, setting the stage for its implementation in optimal control algorithms. Physical processes modeled include advection, diffusion, and environmental heat exchange; the mathematical formulation isone dimensional. The deterministic formulation uses a hybrid characteristics-finite differences numerical scheme for the...

Bacterioplankton and archaeaplankton communities play key roles in the biogeochemical processes of water, and they may be affected by many factors. In this study, we used high-throughput 16S rRNA gene sequencing to profile planktonic bacterial and archaeal community compositions in the upper section of the tidal reach in Yangtze River. We found that the predominant bacterial phyla in this river...

Deep-water navigation channels in the tidal reaches of lower Yangtze River are affected by water and sediment fluxes that produce complex shoals unstable channel conditions. The Fujiangsha reach is particularly difficult to manage, as it has many braided within fluctuation zone. In this study, hydrologic topographic data from 2012 2017 were used examine variations deposition erosion, flow diver...