Estimation of evaporation

The process of evaporation is influenced by a number of factors, the most common and important meteorological parameters affecting evaporation are solar radiation, temperature, relative humidity, wind speed and atmospheric pressure. There are number of models for the estimation of evaporation developed by investigators in different fields of study. The interrelated factors are incorporated into various formulae for estimating evaporation. Due to complex interactions between the components of the land-plantatmospheric systems the reliable estimation of evaporation are extremely difficult.

14p caygaocaolon8 07-11-2020 11 1   Download

This paper aims to quantify the amount of water surface evaporation with special regard to the EWM evaporation pan and to relate the direct measurements to the Penman and other empirical equations. Based on the available 10-minute interval data on the EWM pan evaporation and the data on precipitation for the same intervals, the net water surface evaporation was estimated for the period from July 2010 to October 2012 (excluding the time EWM pan did not function in winter).

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The comparison of ETo estimates was done based on the weekly averages of PET using correlation coefficient and regression methods through different empirical methods namely Modified Penman, Blaney criddle, Christiansen, Thornthwaite, OpenPan, FAO penman method by using daily weather data for the period 1981-2012 (32 years) has collected for three stations of Chhatisgarh state.

9p nguaconbaynhay5 16-05-2020 7 1   Download

Present study examines the effect of climatic factor e.g. Temperature (Maximum and Minimum), Relative humidity (Morning and Evening), Evaporation and Rainfall variation on the yield of different stages of wheat in Samastipur district of Bihar by using Box plot method. The data of wheat yield of 29 Years (1984-2013) was taken from Department of Agricultural Economics, RAU, Pusa and Weather Variables (1984-2013) was taken from Agro-metrology Unit, RAU, Pusa. Box plot will used to estimate the effect of climate variables on the stages of wheat yield.

8p angicungduoc4 04-05-2020 12 1   Download

The study was conducted in Shipra river basin to determine actual evapotranspiration in the area. Long term daily meteorological data including rainfall, maximum temperature, minimum temperature, relative humidity, wind speed and sunshine hours of Indore IMD station was used as input data in CROPWAT Model 8.0. The potential evapotranspiration was converted into actual evapotranspiration by using the crop coefficient. Reference evapotranspiration is a measure of evaporative demand, while the crop coefficient accounts for crop characteristics and management practices (e.g.

12p angicungduoc4 26-04-2020 13 0   Download

The water is an essential component of human life and survival of plants and animals. Estimation of evaporation is very important in arid and semi-arid region where the shortage of water occurs. It plays an important role for planning and management of water resources projects, necessary for scheduling of irrigation and in planning farm irrigation systems. It is a very important component of hydrologic cycle and water resources problems.

9p caygaocaolon4 01-04-2020 17 1   Download

Insufficient water supply is one of the most important factor governing agricultural productions. In addition to rainfall, a thorough knowledge of seasonal values of evaporation and crop transpiration, runoff, deep drainage and soil water storage is required to estimate the water need of crop. Water management is crucial to rightly offer and economize on water use in improvement of rice productivity.

7p chauchaungayxua4 18-03-2020 21 0   Download

The climatic parameters such as Rainfall, mean daily temperature, Wind Speed, relative humidity are spatial and changing with time space and position. That directly affects the availability of basic resources such as surface runoff, vegetation, soil health and quality needed for betterment of sustainability of human being. The predicting the surface runoff is complex and uncertain. It depended of these climatic parameters. Hence, their behaviour needed to be understood before putting in the hydrologic model.

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The evaporation of I2 was observed to follow primarily first order kinetics, depending on the I2 concentration. The evaporation rate constant increased rapidly with increase in temperature. The presence of Ie slightly reduced the evaporation rate of I2 by forming relatively stable I 3 . The effect of Cle at

7p minhxaminhyeu4 26-06-2019 12 1   Download

Marine oil spilled frequently in the Vietnamese waters requires that give rise to the development of effective response system to mitigate or reduce the impacts of an oil spill. In this study, the physical characteristics of types of oil group such as density of oil, evaporation of oil, dispersion of oil were considered.

5p vidoraemon2711 04-06-2019 22 1   Download

(bq) part 2 book "air conditioning and refrigeration" has contents: evaporators, servicing and safety, freezers, comfort air conditioning, commercial air conditioning systems, various types of air conditioners and heat pumps, various types of air conditioners and heat pumps, estimating load and insulating pipes,... and other contents.

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Onewaytogetaroundthissituation istounderstandthewateruseofcropduringgrowth,as this period demands maximum input. With this information, the contribution/influence of energycropsonwaterresourcescanbeunderstood.Waterrequirementsofaplantspeciescan becalculatedbyestimatingtheminimumamountofwaterperhectareyield(orwater limited
yield),whichisbasedonthepotentialyieldofthecropspeciesandtheavailabilityofwater. Wateruseofplants(evapotranspiration) isdependentontheplantspecies.

20p loixinloi 08-05-2013 58 4   Download

Breaking waves on the sea cause the ejection of many tiny droplets of seawater into the atmosphere. These droplets dry by evaporation leaving sea salt particles suspended in the air. Particles are also directly emitted by the bursting of air bubbles on sea surface Such particles are generally in the size range between 1 to 20µm. [19]. Whilst these particles are, in the main, rather coarse in size, a minor part of their mass is in particles small enough to have an appreciable atmospheric lifetime, which has been estimated as three days [20].

73p saimatkhauroi 01-02-2013 48 4   Download

W Water balance of the Aral Sea – the water balance of the sea depends on the correlation between the inflow of river and groundwaters, atmospheric precipitation, and water losses to evaporation. The structure of the A.S. water balance is a function of various levels of economic development. From 1930 through 1990, the available water resources in the basin were estimated at 115 cu. km annually. Natural water losses in 1930 were 36 cu. km, in 1960 – 13 cu. km, and in 1990 – 7 cu. km. Water consumption in 1930 was 25 cu. km, in 1960 – 48 cu....

7p dalatngaymua 27-09-2010 81 4   Download