| 摘要 |
<p>PURPOSE:To make a function of purification workable without fail by providing drainage channels that collect and drain waste water from structural parts of a golf course, and by providing structures for purification of agricultural chemicals in the middle or at the end of the drainage channels. CONSTITUTION:A structure 20 for purification of agricultural chemicals is constructed of a water-retaining layer 21 made of sands or the like, a carbonaceous layer 22 in thickness of 15 cm or more made of charcoal or bark coal granulated in average particle size of 0.5-6 mm, and water-permeable layer made of gravels. Water-solved agricultural chemicals, stuck to sods and existent on the surface of a golf course 10, flow over the surface of the golf course and are brought into drain channels 11 and are brought into the structure 20 for purification. Water and the agricultural chemicals are partially retained in the water-retaining layer 21 and the remainders that are not held in the retaining layer are caught in pores of charcoals in the carbonaceous layer 22, and the water permeating the said layer penetrate through the water- permeable layer 23 and are drained to the outside through a drainage part 24.</p> |
