Abstract The present study sought to use a 20 mm thick foam coated with cement slurry and blue ball diameter of 6 cm, as physical methods, in 50 80% surface covers, their composite coverage the Colorado pan. water depth pans was measured for 1 month autumn season. Then, pans' daily evaporation calculated compared amount control evaporation. results indicated that combined method (plastic foam) ...

[1] Newly available data from extended weather stations and time period reveal that much of China has experienced significant decreases in cloud cover over the last half of the Twentieth century. This conclusion is supported by the analysis of the more reliably observed frequency of cloudfree sky and overcast sky. The total cloud cover and low cloud cover have decreased 0.88% and 0.33% per deca...

evaporation from the soil surface has an important role in the water balance model in nature, so that the major part of rain fall and irrigation water in arid and semi-arid regions is lost via evaporation from the soil surface. in such areas, there are some regions with high water table and because of evaporation from the soil surface, salts accumulation also occur in the soil surface. so evapo...

current study aimed at determining the most reliable drought tolerant criteria for identification of sugar beet genotypes. a split plot design based on randomized complete block design with three replications was applied at motahari research station, karaj, iran in 2012. two irrigation treatments including normal irrigation after 80-90 mm and irrigation after 270 mm evaporation (stress conditio...

The imbalance between precipitation and water evaporation has caused crop yield reduction, drought, desertification. Furthermore, most parts of the world are short water, including China. We proposed a low-cost polymer multilayer film to reduce by only passing through several sunlight wavelengths necessary for photosynthesis. A series experiments were conducted characterize influence partial on...

Despite potential evaporation rates in excess of the local precipitation, dry climates often support saline lakes through groundwater inputs of water and associated solutes. These groundwater-fed lakes are important indicators of environmental change, in part because their shallow water levels and salinity are very sensitive to weather and climatic variability. Some of this sensitivity arises f...