نتایج جستجو برای: suspended load
تعداد نتایج: 168805 فیلتر نتایج به سال:
Prediction of highly non-linear behaviour of suspended sediment flow in rivers is of prime importance in environmental studies and watershed management. In this study, the predictive performance of artificial neural network (ANN) integrated with genetic algorithm (GA) was assessed. GA was used to optimize the parameters and architecture of the ANN. Five simulation scenarios (S1–S5) were develop...
In many water resource projects such as dams, flood control, navigability, river aesthetics, environmental issues and the estimation of suspended load have great importance. The complexity of sediment behavior and mathematical and physical model inability in simulation of sedimentation processes have led to the development of new technologies such as fuzzy logic which has the ability to identif...
The comparison of simultaneous humidity measurements by the Vaisala RS92 radiosonde and by the Cryogenic Frostpoint Hygrometer (CFH) launched at Alajuela, Costa Rica, during July 2005 reveals a large solar radiation dry bias of the Vaisala RS92 humidity sensor and a minor temperature-dependent calibration error. For soundings launched at solar zenith angles between 10° and 30°, the average dry ...
Accurate estimation of sediment load in rivers and reservoirs is an important issue in hydraulic engineering as it affects the design, management and operation of water resources projects. Extract of mathematical relationship in sediment transportation has special complexity. Data-driven methods can be used for Modeling of these phenomena. One of these heuristic self organization methods is Gro...
Zusammenfassung In dieser Arbeit werden zwei numerische Grundlagenuntersuchungen vorgestellt, die das Prozessverständnis von Schwebstoff- und Geschiebetransport erweitern. Die Modellierungen mittels der hochauflösenden Large-Eddy-Simulation durchgeführt. Im Fall des Schwebstofftransports ersten Sekunden nach Verklappung Feinsediment simuliert Geschwindigkeiten Partikel in Schwebstoffwolke im Ve...
Analysis of suspended sediment transport data for rivers in Yunnan and Tibet shows that monsoon fl ows control effective discharge. We calculate effective discharge, defi ned as the discharge that transports the most sediment, for 44 stations for which there is at least one complete year of daily suspended sediment concentration and mean daily discharge data, and fi nd that the effective discha...
Monitoring of surface waters is primarily done to detect the status and trends in water quality and to identify whether observed trends arise from natural or anthropogenic causes. Empirical quality of river water quality data is rarely certain and knowledge of their uncertainties is essential to assess the reliability of water quality models and their predictions. The objective of this paper is...
During flooding, the suspended sediment transport usually experiences a wide-range of dilute to hyper-concentrated depending on local flow and ground conditions. This paper assesses distribution for variety flows. Due differences between flows, linear-power coupled model is proposed integrate these considerations. A parameterised method combining size, Rouse number, mean concentration, depth pa...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید