Design of Flexible Water Pool in Solar Plastic Greenhouse

In the high lifting irrigation to district along two sides of Yellow River in Gansu Province, the biggest problem for developing solar plastic greenhouse is no water resources in winter production because pump stations cannot operate in cold season and the second is high cost of water pool construction for strong permeability and wet collapse property of the loess with large pore and loose structure. In order to develop solar plastic greenhouse in the region, a water pool lined with flexible materials, which was constructed in the greenhouse, was designed. The greenhouse water pool was a large of amount water stored up, such as 300 m 3 of reserved water in a water pool in 50m length by 7m width. Its characteristic was good anti permeability, and small evaporation losses. Becouse of the temperature of water to be high the water in the poool was favorable to the crops growing in winter. The building cost of water pool was low. Hence, it was very suitable for the arid and cold regions and higher permeable soils to develop solar plastic greenhouse.