搜索结果: 1-9 共查到“知识库 理学 wetness”相关记录9条 . 查询时间(0.082 秒)
Numerical Modelling of the Topographic Wetness Index: An Analysis at Different Scales
Resolution DEM Grid Size Wetness Index
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2013/3/7
A variety of landscape properties have been modeled successfully using topographic indices such as topographic wetness index (TWI), defined as ln(a/tanβ), where a is the specific upslope area and β is...
Space-time variability of hydrological drought and wetness in Iran using NCEP/NCAR and GPCC datasets
Space-time variability hydrological drought wetness NCEP/NCAR
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2010/12/22
Space-time variability of hydrological drought and wetness over Iran is investigated using the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanal...
Snow Wetness Influence on Impulse Radar Snow Surveys Theoretical and Laboratory Study
Snow Wetness Influence Impulse Radar Snow Surveys Laboratory Study
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2009/10/23
The snow-water equivalent of late-winter snowpack is of utmost importance for
hydropower production in areas where a large proportion of the reservoir water
emanates from snowmelt. Impulse radar can...
Observed drought and wetness trends in Europe:an update
www.hydrol-earth-syst-sci.net www.hydrol-earth-syst-sci.net www.hydrol-earth-syst-sci.net www.hydrol-earth-syst-sci.net www.hydrol-earth-syst-sci.netObserved drought wetness trends
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2009/9/11
Linear and nonlinear trends of drought and wetness are analysed in terms of the gridded Standardized Precipitation Index (SPI) determined from monthly precipitation in Europe (NCEP/NCAR). In character...
On the calculation of the topographic wetness index：evaluation of different methods based on field observations
topographic wetness index field observations
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2009/5/13
The topographic wetness index (TWI, ln(a/tanβ)), which combines local upslope contributing area and slope, is commonly used to quantify topographic control on hydrological processes. Methods of comput...
Modelling the dynamic chemical interactions of atmospheric ammonia with leaf surface wetness in a managed grassland canopy
dynamic chemical interactions atmospheric ammonia leaf surface wetness grassland canopy
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2010/1/19
Ammonia exchange fluxes between grassland and the atmosphere were modelled on the basis of stomatal compensation points and leaf surface chemistry, and compared with measured fluxes during the GRAMINA...
Dryness-wetness change and regional differentiation of flood-drought disasters in Guangdong during 1480-1940AD
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2007/8/24
Based on the historical records of the drought and flood disasters during 1480-1940AD, this paper reconstructs the sequences of wetness index (WI) and drought and flood disasters. We find ...
Monitoring soil wetness variations by means of satellite passive microwave observations:the HYDROPTIMET study cases
soil wetness variations satellite passive microwave observations HYDROPTIMET
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2009/12/28
Soil moisture is an important component of the hydrological cycle. In the framework of modern flood warning systems, the knowledge of soil moisture is crucial, due to the influence on the soil respons...
Assessing the potential of SWVI (Soil Wetness Variation Index) for hydrological risk monitoring by means of satellite microwave observations
Soil Wetness Variation Index hydrological risk satellite microwave observations
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2010/1/22
In the last years satellite remote sensing applications in hydrology have considerably progressed. A new multi-temporal satellite data-analysis approach has been recently suggested in order to estimat...