A kind of floating ball for preventing the evaporation of the water surface of plain reservoirs and flood dams in arid areas

Abstract

The invention relates to a capping anti-evaporation technology and especially relates to a floating ball capable of preventing water surface evaporation of a plain reservoir and a logging dam in an arid area. The floating ball is characterized in that the sealed hollow floating ball is made of plastic, wherein the plastic is composed of polyolefin with an added inhibitor, the inhibitor occupies a weight percentage of 2.5%-3.7% in the weight of a floating ball shell, and the rest part is made of the polyolefin; a balance weight is firmly connected to the bottom of an inner shell of the hollow floating ball; the radius of the hollow floating ball is 40-60 mm; the ball shell thickness of the hollow floating ball is 1.2-1.8 mm; and the hollow floating ball is light grey. The floating ball has the advantages that the structure is simple; the floating ball floats on a water surface and does not require connection and fixation; the floating ball has high strength and a low gravity center; under external force of winds and waves, the floating ball does not turn over vertically easily; anti-evaporation and water-saving effects are good; the floating ball is highly resistant to the winds and waves, collision, freezing and thawing, leakage, ultraviolet light and water erosion; the manufacture cost is low; and practicability is high.

Description

technical field [0001] The invention relates to the anti-evaporation technology of covering, in particular to a floating ball for preventing the water surface evaporation of plain reservoirs and dams in arid areas. Background technique [0002] There are many plain reservoirs in arid and semi-arid regions, most of which are located on oxbow lakes, paleochannels, and fan-edge depressions in the alluvial plains, and are characterized by large areas, small water depths, and large evaporation losses. Among the 564 reservoirs built in Xinjiang, most of them are plain reservoirs. The total storage capacity of these reservoirs is about 59.3×10 8 m 3 , the water surface area of ​​the reservoir is about 2000 km 2 , with an average water depth of 2.97m. According to estimates from existing research results, the annual evaporation loss of Xinjiang reservoirs is 26.1×10 8 m 3 , the annual leakage is 8×10 8 m 3 , the total annual water loss is about 34.1×10 8 m 3 . It can b...

AI Technical Summary

Problems solved by technology

However, there are a series of problems that follow, such as the limited spreading of film-forming substances on the water surface, whether the film can be repaired automatically under the interference of external strong forces (such as wave force, etc.), the stability and reliability of the film in chemical and biological environments. Degradability and service life, as well as the ecological impact of these chemicals on underwater organisms, are still far from large-scale practical applications.

There are also researchers who use cattail grass to evaporate on the waterproof surface, but its own transpiration makes the anti-evaporation rate low and the effect is not obvious

In addition, cattail grass can only grow under the condition of water depth less than 1m, whether it can be planted in cold and arid areas, and whether it can survive the winter smoothly, so this technology has not been promoted.

At home and abroad, materials such as polystyrene foam boards, polyethylene soft sheets, paraffin wax, and lightweight concrete slabs are used to conduct physical covering measures and waterproof surface evaporation experiments. , poor UV resistance and poor water erosion resistance, especially these materials are easily damaged by wind and waves above level 5 when they are fixed and connected, and it is difficult to achieve a good water-saving effect

Images