The first area of 1.2 hectares, 2 swimming pond water retention ability to retain much water. Adequate supply of water is used in farming throughout the year, but the diversion of water to use. If the vast For example, with an area of about 12-13 acres of pond area using 3-4 acres that still need to use the machinery used to pump water. Thus losing a lot of energy. Especially during the dry season You can reduce energy usage. Or other renewable fuels for energy Or are planning to use the water, as if the area has a lot of different levels. Pipelines can be taken out without using the pump and oil. The drop in agricultural management costs in the long term. For small area of 1-2 acres can be made into a ditch by a modest shift to a narrow area that is too narrow because water is scarce.