Results 231 to 240 of about 1,306,830 (307)

Evaporation from Very Shallow Pans

Journal of Applied Meteorology, 1967
Abstract Evaporation from eight 1-inch deep square pans was studied. The pans were insulated with styrofoam and built in three different sizes. The 1-ft and the 8-ft pans were executed in two colors, black and white, and the 4-ft pans in black, white, green and gray. The measured physical data are tabulated.
Shaw Lei Yu, Wilfried Brutsaert
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Mapping Average Daily Pan Evaporation

Journal of Irrigation and Drainage Engineering, 1984
Voluminous data on monthly averages of Class A pan evaporation can be described concisely by mapping the parameters of Fourier series describing the seasonal variations. Average monthly Class A pan evaporation data were obtained for the 146 U.S. stations east of the Rocky Mountains.
David A. Woolhiser, D. E. Wallace
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Evaluation of Evaporation-Pan Networks

Journal of Irrigation and Drainage Engineering, 1995
A methodology to assess the relative merits of using evaporation-pan networks and semiempirical functions to estimate reference-crop evapotranspiration (ET) is presented. Estimation-error variance is proposed as a basis for comparison. In the case of pan networks, ordinary kriging and universal kriging are viable options for determining estimation ...
David A. Chin, Sifang Zhao
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Evaporation Rate of a White Class A Evaporation Pan

Journal of Irrigation and Drainage Engineering, 2016
AbstractThis study experimentally investigates the influence of color on the evaporation rate of a Class A evaporation pan. Two Class A evaporation pans, one in the original galvanized metal color and the other painted white, are placed in the same meteorological station for 18 months.
Chia-Ren Chu, Ming-Hsu Li, Chien-Han Chen, Jih-Shun Liu   +3 more
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Pan evaporation estimation and derivation of explicit optimized equations by novel hybrid meta-heuristic ANN based methods in different climates of Iran

Computers and Electronics in Agriculture, 2020
Pan evaporation (Ep) estimation is important in scheduling and computing irrigation water requirement. This study evaluated the ability of novel meta-heuristic optimization algorithms including Genetic Algorithm (GA), Grey Wolf Optimization (GWO), and ...
A. Seifi, F. Soroush
semanticscholar   +1 more source

EVAPORATION FROM ATMOMETERS AND PANS

Canadian Journal of Plant Science, 1964
Daily measurements of evaporation from the porous disk and Bellani plate atmometers, the Class A evaporation pan, and the Experimental Farms buried tank were compared and related to daily measurements of temperature, radiation, wind, and vapor pressure.
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Past (1971–2018) and future (2021–2100) pan evaporation rates in the Czech Republic

, 2020
Evaporation from open water surfaces is often estimated based on the pan evaporation (Epan), which is an essential measure for estimating atmospheric evaporative demand.
M. Možný, M. Trnka, V. Vlach, A. Vizina, V. Potopová, P. Zahradníček, P. Štěpánek, L. Hájková, Linda R. Staponites, Z. Žalud   +9 more
semanticscholar   +1 more source

Converting from Pan Evaporation to Evapotranspiration

Journal of Irrigation and Drainage Engineering, 1998
Evapotranspiration is an essential component of the hydrologic cycle, and its accurate estimation is necessary for many hydrologic studies. Via the pan coefficient (\iK\ip), pan evaporation data are widely used to estimate grass reference crop evapotranspiration (\IETo\N).
N. S. Raghuwanshi, W. W. Wallender
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Multi-station artificial intelligence based ensemble modeling of reference evapotranspiration using pan evaporation measurements

Journal of Hydrology, 2019
In this study, different Artificial Intelligence (AI) techniques including Feed Forward Neural Network (FFNN), Adaptive Neuro Fuzzy Inference System (ANFIS), Support Vector Regression (SVR), empirical models including Hargreaves and Samani (HS), Modified
Vahid Nourani, Gozen Elkiran, J. Abdullahi   +2 more
semanticscholar   +1 more source

Investigations of evaporation from pans

Eos, Transactions American Geophysical Union, 1950
The analogy between heat transfer and evaporation yields theoretical equations for evaporation from pans into still air and into moving air under turbulent and laminar boundary conditions. It is found that empirical equations obtained in a wind tunnel (using a water surface covered by blotting paper to prevent spraying) agree well with these ...
openaire   +1 more source