Results 281 to 290 of about 32,689,927 (337)
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Hydrological Processes, 2015
AbstractWith a maize seed planting area of about 67 000 hm2, Zhangye city supplies the seeds for more than 40% of the maize planting area in China. Irrigation water is often overused to ensure the quality of the maize seeds, leading to serious water shortage problems in recent years.
Liwen Zhao, Wenzhi Zhao
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AbstractWith a maize seed planting area of about 67 000 hm2, Zhangye city supplies the seeds for more than 40% of the maize planting area in China. Irrigation water is often overused to ensure the quality of the maize seeds, leading to serious water shortage problems in recent years.
Liwen Zhao, Wenzhi Zhao
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A direct method for forest transpiration measurement
Journal of Hydrology, 1983In the Cretaceous-Tertiary formations of Czechoslovakia intensive studies have been initiated on the groundwater recharge and exploitation in Turonian and Cenomanian aquifers. The region, which covers 16,000 km2, is one of the most promising sources of water in the country.
J. Balek +3 more
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DIFFUSION EFFECTS IN THE TRANSPIRATION METHOD OF VAPOR PRESSURE MEASUREMENT
The Journal of Physical Chemistry, 1959The kinetic effects in laminar flow assuming constant evaporation rate and in turbulent flow are discussed. Results are given for diffusion coefficient measurements at zero flow rate in equilibrium studies of the chlorinepalladium system. (B.O.G.)
U. Merten
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Transpiration Cooling Methods for the SpaceLiner
2008At the Space Launcher System Analysis (SART) department of DLR-Cologne, a hypersonic spaceplane for passenger transportation is being investigated. The spaceplane is called the “SpaceLiner”. The vehicle performs its rocket powered, intercontinental flight via a suborbital trajectory. The major challenge is the aerodynamic heating of the vehicle.
A. Foreest +3 more
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A simple method to determine transpiration efficiency in sorghum
Field Crops Research, 2008Sorghum [Sorghum bicolor (L.) Moench] is a C4 cereal grain crop grown primarily in arid and semi-arid regions in the world with limited or no irrigation. Sorghum production fluctuates and largely depends on the amount and distribution of rainfall. Transpiration efficiency (TE), the biomass produced per unit water transpired, could be a potential trait ...
Z. Xin, C. Franks, P. Payton, J.J. Burke
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Transpiration Boundary Conditions for a Steady Inverse Method
ASME 2012 Gas Turbine India Conference, 2012Computational fluid dynamics has been widely used in the analysis of turbomachinery blades, however, its use as a design tool is far from sophisticated. The inverse method is such a design approach, which lends it self to the latter category. One application of the inverse method is the so called “pure inverse methd”, which differs from common analysis
Jinguang Yang, Hu Wu
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Application of the Transpiration Cooling Method for Reentry Vehicles
45th AIAA Aerospace Sciences Meeting and Exhibit, 2007In the present study, we investigated mechanisms of the transpiration cooling method applied to the thermal protection system of entry vehicles numerically and experimentally. In the transpiration cooling method, cold gases are ejected from the vehicle surface through a kind of porous materials, which blockades the convective and conductive heat fluxes
Hirotaka Otsu +2 more
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Agricultural and Forest Meteorology, 2019
Canopy conductance (Gc) largely regulates carbon/water cycling and land–atmosphere interactions, but quantifying Gc using eddy flux data is limited by the difficulty of partitioning plant transpiration (T) and surface evaporation (E).
Yansong Bai +13 more
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Canopy conductance (Gc) largely regulates carbon/water cycling and land–atmosphere interactions, but quantifying Gc using eddy flux data is limited by the difficulty of partitioning plant transpiration (T) and surface evaporation (E).
Yansong Bai +13 more
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A canopy resistance estimation method to calculate transpiration
Physics and Chemistry of the Earth, 1998Abstract The Penman - Monteith (PM) equation is widely accepted as a tool for transpiration estimates using standard meteorological data. The weak point of this approach is estimation of the surface (canopy) resistances (rc), in PM equation. This contribution presents a method of rc estimate based on the experimentally verified relations between rc ...
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A new method to measure plant water uptake and transpiration simultaneously
Journal of Experimental Botany, 1994A new weighing lysimeter system is described measuring transpiration and water uptake simultaneously on one plant, growing in water culture. The measurements may be made for short time intervals (min) making it possible to monitor quick responses to changing environmental conditions.
van Ieperen, W., Madery, H.
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