| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the process of obtaining (realizing and maintaining) water body larger than 15,000 m<SP>3</SP>for use at low cost in recreation characterized by the same color, transparency and cleanness as swimming pool or tropical sea. <P>SOLUTION: In this process, a water body larger than 15,000 m<SP>3</SP>for use at low cost in recreation having excellent color, transparency, and cleanness properties, for example, a lake or an artificial lagoon is obtained and maintained. The process comprises the step of providing a structure with a skimmer, which can contain a water body larger than 15,000 m<SP>3</SP>, and a step of feeding an inlet water having iron and manganese levels of less than 1.5 ppm and having a turbidity of less than 5 NTU into the structure in the step (a). <P>COPYRIGHT: (C)2008,JPO&INPIT |
