搜索结果: 1-15 共查到“理学 Roughness”相关记录29条 . 查询时间(0.154 秒)
ESTIMATION OF AERODYNAMIC ROUGHNESS AND ZERO PLANE DISPLACEMENT USING MEDIUM DENSITY OF AIRBORNE LIDAR DATA
Airborne LiDAR Aerodynamic Roughness Length Zero Plane Displacement Forest
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2016/10/14
This paper presents a framework to estimate aerodynamic roughness over specific height (zo/H) and zero plane displacement (d/H) over various landscapes in Kelantan State using airborne LiDAR data. The...
Surface roughness of pyroclastic deposits at Mt. Etna by 3D laser scanning
surface roughness pyroclastic deposits Laser 3D
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2015/9/1
The terrestrial 3D Laser Scanning technique has been applied to analyse the surface roughness of pyroclastic deposits on volcanic surfaces at Mt. Etna. This technique allowed the construction of high ...
Effect of land use-based surface roughness on hydrologic model output
land use-based surface roughness hydrologic model coefficient Manning
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2015/8/14
The Manning’s roughness coefficient (n) is commonly used to represent surface roughness in lumped and distributed hydrologic models. Model parameter sensitivity studies identify runoff response to be ...
Effect of land use-based surface roughness on hydrologic model output
land use-based surface roughness hydrologic model coefficient Manning parameter sensitivity watershed runoff responses
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2015/1/8
The Manning’s roughness coefficient (n) is commonly used to represent surface roughness in lumped and distributed hydrologic models. Model parameter sensitivity studies identify runoff response to be ...
Basal roughness of the Institute and Möller Ice Streams, West Antarctica: Process determination and landscape interpretation
Antarctica Roughness Radio-echo sounding Ice dynamics Mö ller Ice Stream Institute Ice Stream
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2014/5/20
We present a detailed analysis of bed roughness beneath Institute and Möller Ice Streams, west Antarctica, using radio-echo sounding data (RES) acquired in the austral summer of 2010/11. We asses...
Tsunami inundation modelling based on detailed roughness maps of densely populated areas
Tsunami inundation modelling based detailed roughness maps densely populated areas
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2010/10/21
An important part within the German-Indonesian Tsunami Early Warning System (GITEWS) project was the detailed numerical investigation of the impact of tsunamis in densely populated coastal areas of In...
Variations in sea surface roughness induced by the 2004 Sumatra-Andaman tsunami
Variations sea surface roughness Sumatra-Andaman tsunami
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2009/12/8
Observations of tsunamis away from shore are critically important for improving early warning systems and understanding of tsunami generation and propagation. Tsunamis are difficult to detect and meas...
Assessing soil surface roughness decay during simulated rainfall by multifractal analysis
soil surface roughness decay simulated rainfall multifractal analysis
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2009/11/2
Understanding and describing the spatial characteristics of soil surface microrelief are required for modelling overland flow and erosion. We employed the multifractal approach to characterize topogra...
Effect of Local Bottom Slope and Roughness Coefficient Variations in Overland Flows
Local Bottom Slope Roughness Coefficient Variations Overland Flows
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2009/10/28
The investigation analyses the effects of local bottom slope and roughness
coefficient variations in overland flow over a plane by using the kinematic
wave theory. Results are compared with the usua...
A parameterization of momentum roughness length and displacement height for a wide range ofcanopy densities
momentum roughness length canopy densities
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2009/6/8
Values of the momentum roughness length, z0, and displacement height, d, derived from wind profiles and momentum flux measurements, are selected from the literature for a variety of sparse canopies. T...
On the derivation of soil surface roughness from multi parametric PolSAR data and its potential for hydrological modeling
soil surface roughness PolSAR data hydrological modeling
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2009/4/28
The potential of multi parametric polarimetric SAR (PolSAR) data for soil surface roughness estimation is investigated and its potential for hydrological modeling is evaluated. The study utilizes mic...
High-Frequency Components of Ocean Waves and Their Relation to the Aerodynamic Roughness
High-Frequency Components Aerodynamic Roughness Ocean Waves
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2009/4/2
Ocean waves of high frequency (from about 10 to 200 rad sec−1) were observed by means of a thin capacitance-type wave gage. The representative rms height, hp, of the sea-surface irregularities a...
Wind Stress and Roughness Length over Breaking Waves
Wind Stress Roughness Length Breaking Waves
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2009/3/7
The effects of surface wave breaking on the adjacent atmospheric boundary layer are examined. It is argued that the transition from aerodynamically smooth to rough flow in a neutral atmosphere corresp...
Variation of Bulk-Derived Surface Flux, Stability, and Roughness Results Due to the Use of Different Transfer Coefficient Schemes
Bulk-Derived Surface Flux Transfer Coefficient Schemes
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2009/1/15
Ten published bulk transfer coefficient schemes are used with more than 2600 sets of shipboard observations made in the North Atlantic at Ocean Station C over a one-year period. Using the same input d...
Effective Roughness Length for Turbulent Flow over a Wavy Surface
Roughness Length Turbulent Flow Wavy Surface
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2009/1/4
A two-equation turbulence model is used to calculate the effective roughness length for two-dimensional turbulent flow over small amplitude, wavy surface topography. The governing equations are solved...