绪言和其他灌溉方法相比,喷灌受土壤、地形等自然条件的制约较少,适用范围广,所以近几年已在旱地灌溉中大量采用,以致于逐渐在大面积普及,特别在象日本西南部地区果树园那样有复杂地形的坡地上,由于便于控制灌溉水、提高灌溉水的有效利用系数及利于防止土壤浸蚀等被重视,而作为高效率的灌溉方法。于是,尽管对此 Introduction Compared with other irrigation methods, sprinkler irrigation by the soil, topography and other natural conditions less restricted, a wide range of applications, so in recent years has been widely used in dryland irrigation, so that gradually widespread in large areas, especially in Southwest Japan As a highly efficient method of irrigation, slopes with complex terrain such as the orchard in the northern part of the prefecture are favored for controlling irrigation water, increasing the effective utilization factor of irrigation water and preventing soil erosion. So, despite that