Abstract The ecological condition of waterways has attracted increasing public attention in recent years, and the evaluation status is practical scientific significance. To carry out an objective credential waterways, this study compares performance two artificial neural networks (ANN) models, including traditional Back Propagation (BP)-ANN model Particle Swarm Optimization (PSO)-BP-ANN model. ...

New Zealand is unique in that half of its national greenhouse gas (GHG) inventory derives from agriculture--predominantly as methane (CH4) and nitrous oxide (N2O), in a 2:1 ratio. The remaining GHG emissions predominantly comprise carbon dioxide (CO2) deriving from energy and industry sources. Proposed strategies to mitigate emissions of CH4 and N2O from pastoral agriculture in New Zealand are:...

This paper proposes a combined control and state estimation strategy for inland waterways, aiming at simultaneously attaining the optimal water level management maximizing hydroelectricity generation. The latter can be realized by turbines installed in canal locks that harness energy generated during lock filling draining operations. These two objectives are of opposed nature, as maximization g...

Building inland waterways affects the natural structure, formation, and extent of riverbed riparian zone. It alters hydrology sediment deposition conditions hence damages aquatic ecosystem. To address effects construction on riverine biome, benthic macroinvertebrate communities were compared at different building stages along a gradient shipping traffic density two montane rivers in China. The ...

Most often, our waterways are being polluted by municipal, agricultural and industrial wastes. When this happens, much of the available dissolved oxygen is consumed by aerobic bacteria in decomposing the waste, thereby robbing other aquatic organisms of the oxygen they need to live. In this paper, we consider the solution of the optimal control problem for the modified Dissolve Oxygen(DO)/ Biol...

Proliferation of toxic cyanobacteria in waterways is a significant global problem. Environmental stressors, including metal toxicity, can affect algal growth and metabolism. There is a need to understand the influence of environmental stressors on the formation and regulation of both cyanobacterial blooms and toxin production. This review will investigate the effects of metal stressors on cyano...

Introduction River management of national and regional waterways has become a complex matter involving multiple disciplines and stakeholders. The decision-making processes in river management regard issues that have a broad, wide-spread, non-transparent and frequently politically sensitive impact on a large and diverse group of stakeholders. The decisionmaking processes are therefore multidisci...